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2. The Power of Believing You Can Get Smarter: The Impact of a Growth-Mindset Intervention on Academic Achievement in Peru. Policy Research Working Paper 9141
- Author
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World Bank, Outes-León, Ingo, Sánchez, Alan, and Vakis, Renos
- Abstract
This paper evaluates the academic impact of a growth-mindset intervention on students starting the secondary level in public schools in urban Peru. ¡Expande tu Mente! is a 90-minute school session aimed at instilling the notion that a person's own intelligence is malleable. Students in schools randomly assigned to treatment showed a small improvement in math test scores and educational expectations, with a large and sustained impact in test scores among students outside the capital city. At a cost of $0.20 per pupil, ¡Expande tu Mente! was highly cost-effective. The results show the potential that brief growth-mindset interventions have for developing countries. [This paper is a product of the Poverty and Equity Global Practice.]
- Published
- 2020
3. Is School Funding Unequal in Latin America? A Cross-Country Analysis. CEPA Working Paper No. 20-11
- Author
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Stanford Center for Education Policy Analysis (CEPA), Bertoni, Eleonora, Elacqua, Gregory, Marotta, Luana, Martinez, Matías, Santos, Humberto, and Soares, Sammara
- Abstract
Public spending on education has increased significantly in Latin America over the last several decades. Yet, the question remains as to whether greater spending translates into a more equitable distribution of resources. We address this issue by measuring inequality in per-pupil spending between regions of varying socioeconomic status (SES) within five different countries: Brazil, Chile, Colombia, Ecuador, and Peru. The results show that while Brazil's funding gap has narrowed over time, this federal nation has the widest socioeconomic spending divide, due to large inequalities in local revenues between high and low SES regions. School funding in Colombia has become more regressive over time, though its gap is half the size of Brazil's. Meanwhile, the distribution of school funding in Peru has changed, shifting from regressive (benefiting the richest regions) to progressive (benefiting the poorest regions). Education spending in Chile and in Ecuador have instead been consistently progressive. However, while the progressiveness of funding in Ecuador is driven by transfers targeting disadvantaged rural areas, the funding formulas in Chile address socioeconomic inequalities beyond the rural-urban gap.
- Published
- 2020
4. Equivalent Years of Schooling: A Metric to Communicate Learning Gains in Concrete Terms. Policy Research Working Paper 8752
- Author
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World Bank, Evans, David K., and Yuan, Fei
- Abstract
In the past decade, hundreds of impact evaluation studies have measured the learning outcomes of education interventions in developing countries. The impact magnitudes are often reported in terms of "standard deviations," making them difficult to communicate to policy makers beyond education specialists. This paper proposes two approaches to demonstrate the effectiveness of learning interventions, one in "equivalent years of schooling" and another in the net present value of potential increased lifetime earnings. The results show that in a sample of low- and middle-income countries, one standard deviation gain in literacy skill is associated with between 4.7 and 6.8 additional years of schooling, depending on the estimation method. In other words, over the course of a business-as-usual school year, students learn between 0.15 and 0.21 standard deviation of literacy ability. Using that metric to translate the impact of interventions, a median structured pedagogy intervention increases learning by the equivalent of between 0.6 and 0.9 year of business-as-usual schooling. The results further show that even modest gains in standard deviations of learning--if sustained over time--may have sizeable impacts on individual earnings and poverty reduction, and that conversion into a non-education metric should help policy makers and non-specialists better understand the potential benefits of increased learning. [This paper is a product of the Office of the Chief Economist, Africa Region and the World Development Report 2018 Team.]
- Published
- 2019
5. Entrepreneurial Learning in TVET. Discussion Paper
- Author
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UNESCO-UNEVOC International Centre for Technical and Vocational Education and Training (Germany) and McCallum, Elin
- Abstract
As a result of its direct link to the labour market, technical and vocational education and training (TVET) plays an important role in equipping the modern workforce with in-demand skills. This discussion paper aims to inspire the introduction of entrepreneurial learning in TVET towards a fully mainstreamed approach, whereby entrepreneurial learning is integrated into the role, function and delivery of TVET systems for the benefit of all learners. The paper provides insight into the different approaches to mainstreaming entrepreneurial learning and illustrates the contribution of the key pillars that make up the entrepreneurial learning ecosystem. This is supported by a series of practical examples from TVET systems around the world, illustrating how entrepreneurial learning is being transformed into reality by governments, TVET systems, communities, networks, institutions, teachers, trainers and TVET learners. This paper explores five elements of the entrepreneurial learning ecosystem: (1) Developing policy for entrepreneurial learning; (2) Curricula and pedagogies; (3) Supporting teachers and trainers; (4) Learning modes other than formal curricula; and (5) Career paths and start-ups.
- Published
- 2019
6. Educational Gaps among Ethnic Minorities: The Case of Afro-Peruvian Girls. Echidna Global Scholars Program Paper
- Author
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Brookings Institution, Center for Universal Education and Villar-Márquez, Eliana
- Abstract
In a multicultural country like Peru, specific and disaggregated data on ethnic and racial minorities are a key resource to inform public policies about neglected populations. For decades, data on Afro-Peruvians has been both limited and inaccurate. Although there are 106 Afro-Peruvian communities, the most recent national census in October 2017 revealed that the Afro-Peruvian population consists of only 828,841 inhabitants, or 3.57 percent of the country's total. For decades, indigenous populations were considered the poorest and most vulnerable minority ethnic group in Peru. That is not always the case. Afro-Peruvian girls are either equally or more disadvantaged than their indigenous counterparts. Peru could benefit from its demographics, because 34.6 percent of its population is aged 0 to 19. However, competitiveness would require a dramatic improvement in the quality of the country's public education. Despite Peru's commitments to the Agenda 2030 and Sustainable Development Goals (SDGs) 4 and 5, the poorest Afro-Peruvian women still have fewer years of schooling than men, which makes them less competitive in the labor market and forces them to take unskilled jobs with lower salaries and few or no benefits. This policy paper relies on a desk review and fieldwork conducted in May 2018 in the community of Yapatera, in the Piura region along the northern coast. Yapatera is a poor community with a high concentration of the Afro-descendant population, located 846 kilometers from the capital city of Lima. The fieldwork included individual interviews and small group conversations. Interview subjects were administrators, teachers, and students (girls and boys in the 4th and 5th grades) at the local public secondary school, as well as community leaders, staff at the Health Center, the Women's Emergency Center, and the police station.
- Published
- 2018
7. Early Mathematics Counts: Promising Instructional Strategies from Low- and Middle-Income Countries. Occasional Paper. RTI Press Publication OP-0055-1807
- Author
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RTI International, Sitabkhan, Yasmin, and Platas, Linda M.
- Abstract
This paper examines common instructional strategies in early grade mathematics interventions through a review of studies in classrooms in low- and middle-income countries. Twenty-four studies met the criteria for inclusion, and analyses reveal four sets of instructional strategies for which there is evidence from multiple contexts. Of the 24 studies, 16 involved the use of multiple representations, 10 involved the use of developmental progressions, 6 included supporting student use of explanation and justification, and 5 included integration of informal mathematics. Based on the review, we provide conclusions and recommendations for future research and policy.
- Published
- 2018
8. Equity and Quality? Challenges for Early Childhood and Primary Education in Ethiopia, India and Peru. Working Papers in Early Childhood Development, No. 55. Studies in Early Childhood Transitions
- Author
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Bernard Van Leer Foundation (Netherlands), Woodhead, Martin, Ames, Patricia, Vennam, Uma, Abebe, Workneh, and Streuli, Natalia
- Abstract
Part of the "Studies in Early Transitions" series, this Working Paper draws on interviews and observations carried out as part of "Young Lives", a 15-year longitudinal study of childhood poverty in Ethiopia, India, Peru and Vietnam based at the University of Oxford's Department of International Development. This paper focuses on the challenges of translating into practice the potential of quality early childhood care and education to transform young lives. These include building a positive equity agenda, setting clear policy objectives, raising quality standards, building the skills and motivation of teachers, and recognising where equity goals can be incompatible with a market-led private system. The paper asks which children do and do not have access to an early childhood programme, and explores children's and parents' views about the quality of what is on offer. A brief summary of data collection methods is appended. (Contains 2 boxes, 21 figures and 9 footnotes.)
- Published
- 2009
9. Opportunity to Learn: A High Impact Strategy for Improving Educational Outcomes in Developing Countries. Working Paper
- Author
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Academy for Educational Development, Gillies, John, and Quijada, Jessica Jester
- Abstract
This paper reports that the basic opportunity to learn does not exist in many countries, and that a concerted management focus to assure that schools provide basic elements of an opportunity to learn (OTL) could potentially yield big improvements in learning. The paper assesses: (1) what basic factors create the opportunity to learn; and (2) to what extent is the lack of these basic elements a problem in developing countries? Elements of a foundational opportunity to learn are identified as: (1) The school is open and located near the student; (2) Minimum instructional time of 850-1000 hours annually; (3) Teacher absenteeism and tardiness; (4) Student absenteeism and tardiness; (5) Appropriate class size and student-teacher ratios; (6) Learning materials are available to every student and regularly used; (7) Time-on-Task; and (8) Learning to read. General strategies suggested for addressing OTL include incorporating OTL issues and awareness in activities and assistance programs such as teacher and principal training; incorporating OTL measures in management and information systems at the school level; and raising awareness by tracking an OTL Index). (Contains 6 figures and 5 tables.) [This paper was written for EQUIP2: Educational Policy, Systems Development, and Management, one of three USAID-funded Leader with Associates Cooperative Agreements under the umbrella heading Educational Quality Improvement Program (EQUIP).]
- Published
- 2008
10. Paper promises: Peruvian frontline health workers' perspectives on mental health policies during COVID-19.
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Mayo-Puchoc N, Bejarano-Carranza J, Paredes-Angeles R, Vilela-Estrada AL, García-Serna J, Cusihuaman-Lope N, Villarreal-Zegarra D, Cavero V, and Ardila-Gómez S
- Subjects
- Humans, Peru, Pandemics, Communicable Disease Control, Health Policy, COVID-19 epidemiology, COVID-19 prevention & control
- Abstract
Governments globally deployed various non-pharmacological public health measures to respond to the COVID-19 pandemic (i.e. lockdowns and suspension of transportation, amongst others); some of these measures had an influence on society's mental health. Specific mental health policies were therefore implemented to mitigate the potential mental health impact of the pandemic. We aimed to explore the implementation of mental health regulations adopted by the Peruvian health system by focusing on the care services at Community Mental Health Centres (CMHCs), based on the experiences of health workers. We conducted a phenomenological qualitative study to understand the implementation of mental health policies launched in Peru during the COVID-19 pandemic. Data were obtained from a document review of 15 national policy measures implemented during the pandemic (March 2020 to September 2021), and 20 interviews with health workers from CMHCs (September 2021 to February 2022). The analysis was conducted using thematic content analysis. Most implemented policies adapted CMHC care services to a virtual modality during the COVID-19 pandemic; however, various challenges and barriers were evidenced in the process, which prevented effective adaptation of services. Workers perceived that ineffective telemedicine use was attributed to a gap in access to technology at the CMHCs and also by users, ranging from limited access to technological devices to a lack of technological skills. Further, although mental health promotion and prevention policies targeting the community were proposed, CMHC staff reported temporary interruption of these services during the first wave. The disparity between what is stated in the regulations and the experiences of health workers is evident. Policies that focus on mental health need to provide practical and flexible methods taking into consideration both the needs of CMHCs and socio-cultural characteristics that may affect their implementation., (© The Author(s) 2023. Published by Oxford University Press in association with The London School of Hygiene and Tropical Medicine.)
- Published
- 2023
- Full Text
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11. Teachers: Powerful Innovators--Generating Classroom Based Education Reform. GEC Working Paper Series. Number 4
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Academy for Educational Development, AED Global Education Center and Alvarado, Felix
- Abstract
The countries of Central America have made great educational strides in recent years. More children are now attending school and more finish primary school; however, there is still a long way to go. We still need to ensure that the children who go to school learn effectively and can use their education to develop useful life and work skills. This document sets out to recognize and commend the many ways in which teachers innovate inside and outside the classroom, as well as to identify the ways in which institutions, programs and projects can more effectively foster innovation. While this paper focuses on experiences in Central America, the findings have worldwide applicability and it is the authors' hope that the information will be shared across regions, countries, and communities to support and improve teacher innovation. The case studies used in this publication are based on Academy for Educational Development (AED) projects in El Salvador, Honduras, Guatemala, Nicaragua, Peru and the Dominican Republic. In particular, the authors have relied on the help of many colleagues and leaders in these countries who are committed to improving educational quality, who have referred them to examples of teacher innovation and in many cases have written down the stories. This paper is divided into four sections. The first section explores the importance of teachers as the linchpin to effective learning in the classroom, the significance of innovation in that role and some of the assumptions that get in the way of seeing the teacher as an innovator. The second section illustrates, by using examples from teaching practice in the different countries, the wealth of innovative practices that teachers have discovered. The third section proposes a model for nurturing innovation based on teacher empowerment, teacher formation and institutional development. Examples of interventions that have been effective in strengthening teacher innovation are used to illustrate this model. Finally, the authors present a working framework of principles and components for a strategy to foster teacher innovation, taking into account the capacities and responsibilities of different actors in the education sector. Appended are: (1) Description of Projects and Initiatives; (2) Additional Resources; and (3) Bibliography. (Contains 1 footnote.) [This paper was written with Diane La Voy.]
- Published
- 2006
12. Continuity and Respect for Diversity: Strengthening Early Transitions in Peru. Working Papers in Early Childhood Development, No. 56. Studies in Early Childhood Transitions
- Author
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Bernard Van Leer Foundation (Netherlands), Ames, Patricia, Rojas, Vanessa, and Portugal, Tamia
- Abstract
This working paper is part of a series on early transitions from "Young Lives," a 15-year longitudinal study of childhood poverty in Ethiopia, India, Peru and Vietnam. It explores the diverse experiences of 28 children from four contrasting communities in Peru as they start school. These detailed case studies highlight common problems: exclusion of certain parts of the population from pre-school services, lack of coordination between pre-schools and primary schools, issues with physical punishment and cultural diversity. It proposes four ways in which children's early educational transitions can be enhanced, looking at such factors as educational structures, curriculum planning and teacher training. (Contains 4 figures, 3 tables and 23 footnotes.)
- Published
- 2010
13. Early Childhood Transitions Research: A Review of Concepts, Theory, and Practice. Working Papers in Early Childhood Development, No. 48
- Author
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Bernard Van Leer Foundation (Netherlands), Vogler, Pia, Crivello, Gina, and Woodhead, Martin
- Abstract
Children face many important changes in the first eight years of life, including different learning centres, social groups, roles and expectations. Their ability to adapt to such a dynamic and evolving environment directly affects their sense of identity and status within their community over the short and long term. In particular, the key turning points in children's lives--such as "graduating" from kindergarten to primary school or going through a culturally specific rite of passage--provide challenges and opportunities for learning and growth on multiple levels. This paper provides a review of the major perspectives in research on early childhood transitions and reveals the predominant areas of focus in both academic and professional studies, as well as important neglected viewpoints and study populations. Beginning with a broad and inclusive definition of the topic, the authors provide an overview of early childhood transitions research, highlighting the underlying assumptions that informed the studies. They assess concepts in the developmental theory that preceded transitions research as well as in the logic that determines how transitions are structured. More recent approaches are examined, including systems theories and the role of children as active participants in transitions. Several examples in this review show how multidisciplinary collaboration and culturally sensitive interventions can result in better participation of both parents and children in crucial early childhood transitions. Citing the need to harmonise early childhood education and care programmes with local education practices, the authors stress the value of greater transparency in the creation of policy and programming for children, in order to identify potentially limiting assumptions. Broadening and diversifying perspectives on transitions can lead to more integrated and culturally relevant rights-based early childhood programmes worldwide. A glossary and a bibliography are included. (Contains 7 footnotes.)
- Published
- 2008
14. Sampling is decisive to determination of Leishmania (Viannia) species.
- Author
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De los Santos, Maxy B., Loyola, Steev, Perez-Velez, Erika S., Santos, Rocio del Pilar, Ramírez, Ivonne Melissa, and Valdivia, Hugo O.
- Subjects
LEISHMANIA mexicana ,RESOURCE-limited settings ,CUTANEOUS leishmaniasis ,LEISHMANIA ,FILTER paper ,POLYMERASE chain reaction - Abstract
Background: Accuracy of molecular tools for the identification of parasites that cause human cutaneous leishmaniasis (CL) could largely depend on the sampling method. Non-invasive or less-invasive sampling methods such as filter paper imprints and cotton swabs are preferred over punch biopsies and lancet scrapings for detection methods of Leishmania based on polymerase chain reaction (PCR) because they are painless, simple, and inexpensive, and of benefit to military and civilian patients to ensure timely treatment. However, different types of samples can generate false negatives and there is a clear need to demonstrate which sample is more proper for molecular assays. Methodology: Here, we compared the sensitivity of molecular identification of different Leishmania (Viannia) species from Peru, using three types of sampling: punch biopsy, filter paper imprint and lancet scraping. Different composite reference standards and latent class models allowed to evaluate the accuracy of the molecular tools. Additionally, a quantitative PCR assessed variations in the results and parasite load in each type of sample. Principal findings: Different composite reference standards and latent class models determined higher sensitivity when lancet scrapings were used for sampling in the identification and determination of Leishmania (Viannia) species through PCR-based assays. This was consistent for genus identification through kinetoplastid DNA-PCR and for the determination of species using FRET probes-based Nested Real-Time PCR. Lack of species identification in some samples correlated with the low intensity of the PCR electrophoretic band, which reflects the low parasite load in samples. Conclusions: The type of clinical sample can directly influence the detection and identification of Leishmania (Viannia) species. Here, we demonstrated that lancet scraping samples consistently allowed the identification of more leishmaniasis cases compared to filter paper imprints or biopsies. This procedure is inexpensive, painless, and easy to implement at the point of care and avoids the need for anesthesia, surgery, and hospitalization and therefore could be used in resource limited settings for both military and civilian populations. Author summary: Human cutaneous leishmaniasis affects low-income populations living in places far from health services. The early sampling and detection of the parasite are necessary for timely treatment, however there are no uniform sampling criteria, thus the sensitivity of molecular tests may vary due to various factors such as the type of sample, the time of the disease and the parasite load in the lesion. In this study, we compared the performance of three sampling methods for molecular identification of the genus and Leishmania (Viannia) species in Peru. Several analytical methods, including composite reference standards and latent class models, suggested that lancet scraping might be the best approach for parasite genus detection by kDNA-PCR and for parasite species determination by FRET probes-based Nested Real-Time PCR. [ABSTRACT FROM AUTHOR]
- Published
- 2024
- Full Text
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15. Helping Children Outgrow War. SD Technical Paper.
- Author
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Agency for International Development (IDCA), Washington, DC. Bureau for Africa., Miller, Vachel W., and Affolter, Friedrich W.
- Abstract
Helping children outgrow war is an overarching goal of educational reconstruction in post-conflict settings, but responses must be highly adaptive and informed by insights gained from interventions elsewhere. This guidebook offers seven examples of successful interventions in post-conflict settings internationally, situating them within a framework that emphasizes the ecology of children's well-being and learning. To facilitate navigation of the guidebook, cases are organized according to post-conflict phases, including emergency, recovery, rehabilitation, and reconstruction. These phases indicate the stability of government and the health of civil society, important parameters for guiding programmatic choices. The cases illustrate many of the key dimensions of a comprehensive approach to helping children overcome violence and rebuild their lives. Following each case study is a discussion of critical theoretical issues and a set of questions regarding practical considerations for project design. While not intended to serve as a training manual per se, the guidebook contains elements that can be extracted for use in training workshops or policy discussions. Following the Teacher Emergency Packages (kits which enable teachers to begin instructional activities in a war-ravaged context), cases are as follows: (1) Child Soldiers (exploitation of child fighters in Africa); (2) Butterfly Garden (Batticaloa, Sri Lanka, has a garden dedicated to creative play for war-affected children); (3) Children's Participation (illustrates challenges of children's participation in a conflict setting in Sri Lanka); (4) Peace Education (insights from a project in a Kenyan refugee camp); (5) Project DiaCom (in Bosnia, the project allows Serb and Bosniak teachers to enter into a dialogue process); (6) Community Leadership (builds capacity for community in internally displaced people in Azerbaijan); and (7) Human Rights Training (in Peru, a human rights organization conducts workshops that bring together diverse participants to learn about their rights and share experiences). (BT)
- Published
- 2002
16. Working Papers in Educational Linguistics, 1996-1997.
- Author
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Pennsylvania Univ., Philadelphia. Graduate School of Education. and Furumoto, Mitchell A.
- Abstract
Reports of language research in the 1996 issue include: "Corpus Planning for the Southern Peruvian Quechua Language" (Serafin M. Coronel-Molina); "Foreign Language Planning in U.S. Higher Education: The Case of a Graduate Business Program" (Mitchell A. Furumoto); "Charting New Directions: Of Communication in a Social Service Setting" (Craig Heim); "Appropriacy Planning: Speech Acts Studies and Planning Appropriate Models for ESL Learners" (Mitsuo Kubota). Reports in the 1997 issue include: "Tradition and Transition in Second Language Teaching Methodology" (Teresa Pica); "Cultural Consciousness in a Language Class" (Hiamanti Banerjee); "Language Policy: Status Planning for the Quechua Language in Peru" (Coronel-Molina); "Politeness Strategies in the Workplace: Which Experiences Help Japanese Businessmen Acquire American English Native-Like Strategies?" (Yuko Nakajima); and "Who Is Telling Stories and Whose Stories Are Being Told?" (Anne Pomerantz). An index to 1984-1997 issues of the journal and abstracts of 1996-97 doctoral dissertations done for the Language in Education Division (LED) of the University of Pennsylvania are also included. (MSE)
- Published
- 1997
17. The Impact of Training on Women's Micro-Enterprise Development. Education Research Paper. Knowledge & Research.
- Author
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Department for International Development, London (England)., Leach, Fiona, Abdulla, Salwa, Appleton, Helen, el-Bushra, Judy, Cardenas, Nora, Kebede, Kibre, Lewis, Viv, and Sitaram, Shashikala
- Abstract
A study investigated the impact of training on women's micro-enterprise development in four programs in Ethiopia, India, Peru, and Sudan. Research design was a series of case studies of projects and programs providing training in technical or business skills. Impact of training was measured against these four indicators: income, access to and control of resources, status, and quality of life. The study examined the training process to find out in what specific ways training helped women to improve and expand their micro-enterprises. The sample in each country consisted of two groups: women about to undergo training (focus of the study) and women who had already received training; 74 women participated. The study showed poor women needed training to develop skills and self-confidence to allow them to operate and survive in the informal sector; access to credit is important but not sufficient for the poorest women; the impact of training and increased income varied in strength but could be negative as well as positive; well-designed and well-delivered training could lead to increased income that could lead to improved self-esteem and status in the household and community; effectively delivered training developed enhanced survival strategies in women; training provided to groups in a participatory model was an empowering and liberating experience for women; and training in generic business skills was more effective than training in technical skills. (Appendixes include 61 references.) (YLB)
- Published
- 2000
18. Women's Work, Education, and Family Welfare in Peru. World Bank Discussion Papers 116.
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World Bank, Washington, DC., Herz, Barbara K., and Khandker, Shahidur R.
- Abstract
This report examines ways of improving women's productivity and education and the consequences for development in Peru. The research finds that women account for about 39 percent of family income in Peru. They carry the main responsibility for child care and heavily influence family decisions on children's education and family size. Improving opportunities for women thus can be a means to foster economic and social development as well as an end in itself. The main way to expand women's opportunities is through human capital investments, notably education beyond the primary level. This will increase women's earning capacity, broaden their labor force participation, and thereby promote economic growth, family welfare, and slower population growth. This report is comprised of seven articles: (1) "The Extent and Impact of Women's Contribution in Peru: A Descriptive Analysis" (M. Schafgans); (2) "Labor Market Participation, Returns to Education, and Male-Female Wage Differences in Peru" (S. Khandker); (3) "Modeling Economic Behavior in the Informal Urban Retail Sector in Peru" (J. Barry Smith; M. Stelcner); (4) "Household Production, Time Allocation, and Welfare in Peru" (J. Dagsvik; R. Aaberge); "Fertility Determinants in Peru: A Quantity-Quality Analysis" (M. Schafgans); (6) "Gains in the Education of Peruvian Women, 1940 to 1980" (E. King; R. Bellew); and (7) "Does the Structure of Production Affect Demand for Schooling in Peru?" (I. Gill). Numerous tables of data, figures, and diagrams appear throughout the report. A lengthy bibliography is included. (Author/DB)
- Published
- 1991
19. Education and Earning in Peru's Informal Nonfarm Family Enterprises. Living Standards Measurement Study Working Paper No. 64.
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World Bank, Washington, DC. and Moock, Peter
- Abstract
Data from the 1985 Living Standards Survey in Peru were studied in this analysis of non-farm family businesses from the informal sector in order to categorize 2,735 family enterprises and to explain the earnings per hour of family labor. Most of the existing research on the self-employed uses the individual as the unit of analysis; however, this study uses the enterprise as the unit of analysis and asks whether schooling makes a difference in family income. Generally these businesses are loosely organized, pay no taxes, and employ a large segment of the Peruvian working sector. Regression analyses show significant effects of schooling on earnings. Returns differed markedly among four sub-sectors and by gender and by location (Lima, other cities, rural). The results were consistent with education being valueless in traditional activities but having a positive effect in jobs requiring literacy, numeracy, and adjustment to change. Post secondary education had a fairly high and significant pay off in urban areas for both women and men. A 20-item bibliography and 11 tables of statistical data are included. (NL)
- Published
- 1990
20. Does Education Pay in the Labor Market? The Labor Force Participation, Occupation, and Earnings of Peruvian Women. Living Standards Measurement Study Working Paper Number 67.
- Author
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World Bank, Washington, DC. and King, Elizabeth M.
- Abstract
This study examined how education and postschool vocational training affect the type and extent of labor market participation of women in Peru. It also estimated monetary returns to different levels of schooling, to formal general and technical schooling, and to training. The sample, which comprised more than 5,600 women in urban and rural Peru, was drawn from the Peruvian Living Standard Survey. More than 70 percent of these women were in the labor force at the time of the survey, about 35 percent working in paid jobs. The overall level of female labor force participation in Peru is 72 percent, and this percentage is higher in rural areas than in urban areas. The majority (60 percent) of paid female workers are self-employed, but these jobs tend to be very low paying. Women holding jobs in the public sector are the best paid. In general, the study found that education and training enhance the contribution of women in the labor market. Although education does not increase the participation of Peruvian women in the labor force (and may in fact decrease it), it alters the occupational distribution of female workers by increasing the proportion of women in paid employment. Among paid employees, education is positively related to hourly earnings; the relationship is nonlinear, with primary education showing higher returns than secondary education. The return to postsecondary education appears low and negative, except for the small fraction of women who have earned a diploma. The poor performance of the Peruvian economy since the early 1970s has influenced this result. (26 references.) (Author/KC)
- Published
- 1990
21. SCIENTIFIC MISCONDUCTS: PAPER MILLS IN PERU.
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Mayta-Tristán, Percy and Borja-García, Ruben
- Subjects
- *
PAPER mills , *SCIENCE databases , *TEACHERS , *STUDENTS , *MANUSCRIPTS - Published
- 2022
- Full Text
- View/download PDF
22. Publication rate and factors associated with the publication of papers submitted to the National Scientific Congresses held by the Peruvian Medical Student Scientific Society between 2010 and 2014.
- Author
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Aquino-Canchari, Christian, Guillen-Macedo, Karla, Gómez-Mamani, Yonatan, and Alarco, Juan Jhonnel
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MEDICAL students ,STUDENT organizations ,BIVARIATE analysis ,MANN Whitney U Test ,POISSON regression - Abstract
Copyright of Revista Facultad de Medicina de la Universidad Nacional de Colombia is the property of Universidad Nacional de Colombia and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
- Published
- 2022
- Full Text
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23. The Willingness To Pay for Education in Developing Countries: Evidence from Rural Peru. Living Standards Measurement Study Working Paper No. 54.
- Author
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World Bank, Washington, DC., Gertler, Paul, and Glewwe, Paul
- Abstract
Schools in developing nations tend to be concentrated in urban areas, making it necessary for children living in rural areas to travel long distances to attend school. Government resources are limited and many countries have limited education expenditures due to faltering economic growth. Since government is the principal provider of education and the demand far exceeds the supply, some economists are now advocating increasing school fees to fund education improvements. Using a theoretical model of the demand for schooling and the principle of compensating variations, this study calculated parental willingness to pay for new secondary schools in rural areas of Peru. The results showed that even those in the poorest quarter of the Peruvian income distribution sector were willing to pay fees high enough to cover operating costs of opening new secondary schools in rural villages. An extensive list of statistical tables and a 25-item bibliography are included in the report. (NL)
- Published
- 1989
24. PHYSICOCHEMICAL INDICATORS OF SOIL WITH CONVENTIONAL RICE (Oriza sativa L.) MANAGEMENT UNDER IRRIGATION.
- Author
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Trigoso-Becerril, Daniel, Florida-Rofner, Nelino, and Rengifo-Rojas, Alex
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IRRIGATION management ,ORGANIC farming ,CROP residues ,SOILS ,RICE ,SECONDARY forests ,INDICATORS & test-papers - Abstract
Copyright of La Granja, de Ciencias de la Vida is the property of Universidad Politecnica Salesiana and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
- Published
- 2023
- Full Text
- View/download PDF
25. Detection and Species Identification of Leishmania DNA from Filter Paper Lesion Impressions for Patients with American Cutaneous Leishmaniasis.
- Author
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Boggild, Andrea K., Valencia, Braulio Mark, Espinosa, Diego, Veland, Nicolas, Ramos, Ana Pilar, Arevalo, Jorge, Llanos-Cuentas, Alejandro, and Low, Donald E.
- Subjects
- *
LEISHMANIASIS , *PRECANCEROUS conditions , *PROTOZOAN diseases , *LEISHMANIA , *DIAGNOSTIC examinations , *CUTANEOUS leishmaniasis , *POLYMERASE chain reaction , *GENETICS , *DIAGNOSIS - Abstract
Background. Traditional detection of Leishmania from ulcers involves collection of invasive specimens that cause discomfort, require technical expertise, and carry risks of invasive procedures. We compared traditional diagnostic methods with a molecular noninvasive filter paper-based method for the diagnosis of cutaneous leishmaniasis. Methods. Consecutive patients presenting to the Leishmania Clinic at Hospital Nacional Cayetano Heredia were enrolled. Polymerase chain reaction (PCR) was performed on lesion scrapings, aspirates, and filter paper impressions. The reference standard was any 2 of 5 tests positive: smear, aspirate culture, invasive-specimen PCR (scrapings and aspirates), filter paper PCR, and leishmanin skin test. Outcome measures were sensitivity and specificity. Leishmania speciation was performed by PCR--restriction fragment length polymorphism (RFLP) of positive specimens. Results. Forty-five patients with 66 lesions were enrolled. Of 52 lesions diagnosed as cutaneous leishmaniasis, 50 were positive by PCR of invasive specimens versus 48 by PCR of filter papers (P = .930). Sensitivity and specificity of PCR on invasively obtained specimens were 94.2% (95% confidence interval [CI], 87.9%-100%) and 92.9% (95% CI, 79.4%-100%). Sensitivity and specificity of filter paper PCR were 92.3% (95% CI, 85.1%-99.5%) and 100%. Culture, smear, and leishmanin skin test all had inferior sensitivities, compared with PCR of invasive or noninvasive specimens (P < .001). Of 50 specimens positive by PCR, 19 had sufficient DNA for PCR-RFLP analysis. Conclusions. Filter paper PCR constitutes a sensitive and specific alternative to traditional diagnostic assays. This novel, rapid, well-tolerated method has the potential for widespread use in the field and in pediatric populations where traditional specimen collection is most difficult to perform, and can potentially be used for rapid species identification. [ABSTRACT FROM AUTHOR]
- Published
- 2010
- Full Text
- View/download PDF
26. Spatial analysis for water supply in seismic emergencies: the Lima-Callao metropolitan area.
- Author
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Santa-Cruz, Sandra, de Córdova, Graciela Fernández, Vilela, Marta, Pajuelo, José, Santa-María, María, Muñoz, Kevin, Najjar, Mohammad K., and Chettri, Nimesh
- Subjects
METROPOLITAN areas ,WATER supply ,WATER analysis ,PUBLIC spaces ,GEOGRAPHIC information systems ,SOCIAL impact - Abstract
Introduction: In urban areas exposed to high-magnitude earthquakes, the drinking water supply would be severely damaged, and domestic services would be disrupted for a large part of the population in the event of an earthquake. The Lima-Callao metropolitan area in Peru, South America, is expected to experience an 8.8 Mw earthquake, and it is estimated that approximately 90% of the population would not have immediate access to emergency water in the case of such an event. The main objective of this paper is to define criteria for a spatial analysis method to guide the design criteria for an Emergency Water Supply System (EWaSS). Methods: This paper combines territorial, urban resilience and participatory approaches and presents the results of an interdisciplinary research with social impact. Thus, it examines the urban territory at macro-, meso- and micro scales; physical-spatial variables indicating risk levels and possible public spaces to implement the system; and socio-spatial variables regarding the population, risk perception and participation in management to strengthen urban resilience. Normative tools and the Geographic Information System are used to spatialize and systematize quantitative and qualitative information. Results and discussion: The EWaSS is an alternative for safe water supply in a post-disaster situation that would provide immediate and autonomous operation during the first 72 h of the emergency. The results show the physical-spatial and social viability of urbanized areas and the system design criteria that guide local actors in making decisions at the three levels of emergency management. [ABSTRACT FROM AUTHOR]
- Published
- 2024
- Full Text
- View/download PDF
27. XRF elemental analysis of inks in South American manuscripts from 1779 to 1825.
- Author
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Luízar Obregón, Celina, Zamalloa Jara, Marco A., Rojas Arizapana, Flor L., Chura Huayllani, Yuri J., Gonzales Bellido, Janet F., and Olivera Olivera, Jorge
- Subjects
ELEMENTAL analysis ,X-ray fluorescence ,X-ray spectrometers ,CHEMICAL detectors ,TRACE elements ,MANUSCRIPTS ,EIGHTEENTH century - Abstract
The Regional Archive of Cusco in Peru guards valuable history collections with exceptional regional and international value dating from the sixteenth century to the present. Historical manuscripts are part of the identity of all people; they constitute a tangible cultural heritage that must be studied, valued, and protected. In this sense, the objective of this research was to identify the chemical compositions of inks and paper, with the goals of setting the background of their originality, identifying relationships between them, and glimpsing antecedents that generated degradation due to the compositions of the inks. This study is the first of its kind in Peru and reveals the chemical elements present in the writing ink, the seal, and the paper of five documents from the late eighteenth and early nineteenth centuries. Duplicate in situ nondestructive analyses were carried out using a hand-held X-ray fluorescence spectrometer under ambient conditions in soil mode, configured with three sequential shots, and energies from zero to 40, 40, and 15 keV, respectively. The elements S and Fe were present as components of iron gall inks. Cu and Zn were less abundant; probably, they provided less corrosion and more color intensity to the inks. The minor elements Pb, As, and especially Ag in all manuscripts differentiate them from European inks of the same period. Additionally, the five documents reflect the same elemental compositions but with different concentrations. This could mean that writers used local raw materials and Spanish ink recipes. Finally, the analyses of standard reference material, SRM 1646a and SRM 196b, gave results with acceptable precision. [ABSTRACT FROM AUTHOR]
- Published
- 2021
- Full Text
- View/download PDF
28. Microbiological indicators of tropical soils quality in ecosystems of the north-east area of Peru.
- Author
-
Valdez-Nuñez, Renzo Alfredo, Rojas-García, José Carlos, and Ríos-Ruiz, Winston Franz
- Subjects
SOIL quality ,MULTIPLE correspondence analysis (Statistics) ,MICROORGANISM populations ,ECOSYSTEMS ,INDICATORS & test-papers - Abstract
Tropical soils withstand heavy pressure due to deforestation as a result of the change in land use, decreasing their quality. Traditionally, the quality of soil has been based on physical and chemical indicators; however, the biological ones can predict variations in the quality, in an early and effective way. In this research, the microbiological quality of soils from two ecosystems was evaluated, one from the Cumbaza Sub-Basin (CSB) and the other from Degraded Pastures at Cuñumbuque (DPC), both in San Martín, Peru. The physicochemical characteristics were studied and the microbial populations of Total Bacteria (TB), Sporulated Bacteria (SB), Total Fungi (TF), Actinobacteria (ACT), and parameters of microbial activity such as Basal Respiration (BR), Microbial Biomass (MB), Metabolic Quotient (qCO2) and Microbial Quotient (qMIC). According to the Principal Component Analysis (PCA), the soils of the CSB had on average a lower biological quality compared to the DPC soils. The PCA discriminated that the microbial populations of TB, SB, ACT and MB represented effective microbiological indicators to evaluate the quality of the soils, in this respect the soils of Shapumba, Chontal, Aucaloma and Vista Alegre are degraded and require the application of new technologies and public policies for their recovery. [ABSTRACT FROM AUTHOR]
- Published
- 2019
- Full Text
- View/download PDF
29. Centralized injustices: understanding energy resilience in times of disruption in low-income settlements in Peru.
- Author
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Lambert, Rita, Tomei, Julia, Escalante Estrada, Carlos, and De Los Rios, Silvia
- Subjects
POOR communities ,COVID-19 pandemic ,SHARING economy ,SUSTAINABILITY - Abstract
What happens once people have electricity has received far less analytical and policy attention than the provision of the infrastructure itself. For low-income settlements that have gained a connection to the grid, energy access challenges can still prevail, keeping many inhabitants in energy poverty. This paper analyses energy practices in three low-income neighbourhoods in Lima, Peru, with particular attention to inhabitants' responses in the face of the COVID-19 pandemic. In doing so, it seeks to draw lessons for energy policy and planning to enhance energy resilience in the transition towards more just and sustainable futures. Building on energy resilience scholarship and drawing links with justice debates, this paper discusses three community coping strategies: (1) fuel stacking; (2) collective practices and the shared economy; and (3) material and spatial changes. It analyses how these strategies relate to dominant policy directions, as well as their implications for energy resilience and justice more broadly. [ABSTRACT FROM AUTHOR]
- Published
- 2023
- Full Text
- View/download PDF
30. Discharge Coefficients of Standard Spillways at High Altitudes.
- Author
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Rendón, Víctor, Sánchez-Juny, Martí, Estrella, Soledad, Sanz-Ramos, Marcos, Rucano, Percy, and Huarca Pulcha, Alan
- Subjects
DISCHARGE coefficient ,SPILLWAYS ,ALTITUDES ,SEA level ,ATMOSPHERIC pressure - Abstract
This paper presents an experimental campaign conducted next to the Condoroma dam, in Perú, at 4075 m a.s.l. The tests carried out in this paper were conducted in a 21 m long channel located at the toe of Condoroma dam. The setup consisted of a series of standard profile spillways with a vertical upstream face of up to five different dimensionless heights (P/H
d ) ranging from 0.5 to 2. The experimental results indicated that, the P/Hd ratio influences the discharge coefficients in Condoroma, and P/Hd ≥ 1 values are recommended for the design of the spillway profile. In addition, for all the P/Hd ratios studied, the discharge coefficients adjusted to the Condoroma altitude were lower than those reported by classical formulations used in conventional spillway designs. Finally, a generalized equation is proposed to estimate the discharge coefficient for standard spillways located in dams at similar elevations above sea level. [ABSTRACT FROM AUTHOR]- Published
- 2024
- Full Text
- View/download PDF
31. IoT Control and Visualization System with Digital Twins and Augmented Reality in a Digital Transformation Space.
- Author
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Yauri, Ricardo and Mallqui, Gerson
- Subjects
DIGITAL transformation ,DIGITAL twins ,DIGITAL control systems ,AUGMENTED reality ,INTERNET of things ,DIGITAL technology - Abstract
This paper describes the use of Internet of Things (IoT) technologies, digital twins (DT), and augmented reality (AR) to raise awareness and disseminate the use of digital services within the INICTEL-UNI institutional project financed by the Inter-American Development Bank to strengthen technological services and satisfy the technological needs of companies, promoting digital transformation in Peru. Within various fields, such as technical education, construction, and manufacturing, challenges are faced related to the adoption of advanced technologies and the need to improve efficiency. The main objective of this paper is to implement an IoT control and visualization system with DT and AR in a digital transformation space. A system is shown to create a technological demonstrator environment that visualizes and monitors sensor data on physical IoT devices in real time, allowing users to interact and operate them through an ESP32 module with data transmission with the MQTT protocol and an AR application developed in Unity and Vuforia. The study results successfully demonstrated the efficiency of real-time communication between the IoT device and the AR application, as well as the efficient ability to perform tasks, validated by users with no prior experience. [ABSTRACT FROM AUTHOR]
- Published
- 2024
- Full Text
- View/download PDF
32. Not in it for the money: Meaningful relationships sustain voluntary land conservation initiatives in Peru.
- Author
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López de la Lama, Rocío, Bennett, Nathan, Bulkan, Janette, de la Puente, Santiago, and Chan, Kai M. A.
- Subjects
CONSERVATION easements ,NATURE reserves ,PROTECTED areas ,SEMI-structured interviews ,HUMAN beings ,PERIODICAL articles - Abstract
Copyright of People & Nature is the property of Wiley-Blackwell and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
- Published
- 2024
- Full Text
- View/download PDF
33. Prehispanic Arid Zone Farming: Hybrid Flood and Irrigation Systems along the North Coast of Peru.
- Author
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Caramanica, Ari
- Subjects
DRY farming ,ARID regions ,SUSTAINABLE agriculture ,EL Nino ,HYBRID zones ,EXTREME environments ,POTASSIUM ,RAINFALL - Abstract
As arid lands expand across the globe, scholars increasingly turn to the archaeological record for examples of sustainable farming in extreme environments. The arid north coast of Peru was the setting of early and intensive irrigation-based farming; it is also periodically impacted by sudden, heavy rainfall related to the El Niño Southern Oscillation (ENSO) phenomenon. While the sociopolitical effects, technologies, and engineering expertise of these irrigation systems have been thoroughly examined and theorized, little is known about how farmers managed periods of water stress. The aim of this study is to test whether arid zone farming was supported by hybrid, intermittent flood and perennial water source systems in the prehispanic past. An arroyo in the Chicama Valley was selected for preliminary data collection, and these data are presented here: (1) drone photography of the arroyo capturing the aftermath of a recent (2023) rain event; and (2) potassium (K) soil test kit results from samples collected near suspected prehispanic check dam features in the same area. The paper combines these data with comparative examples from the literature to suggest that the prehispanic features functioned as water-harvesting infrastructure. The paper concludes that sustainable, arid zone farming can be supported by hybrid, intermittent flood and perennial water source systems. [ABSTRACT FROM AUTHOR]
- Published
- 2024
- Full Text
- View/download PDF
34. The Catholic Church in Fragile Democracies: An Influencer, a Moral Guide, or a Judge? A Case Study from the Peruvian Catholic Church.
- Author
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Piccone-Camere, Carlos and Lecaros, Véronique
- Subjects
JUDGES ,RELIGIOUS institutions ,SERMON (Literary form) ,VALUES (Ethics) ,DEMOCRACY ,LIBERATION theology ,RELIGION & politics - Abstract
This paper navigates the complex roles that the Catholic Church assumes in fragile democracies, exploring whether it functions as an influencer, a moral guide, or a judge in shaping public policies and societal values using the Peruvian context as a focal reference. The authors begin by providing an overview of the global religious landscape, highlighting the diverse and polarized trends within the ecclesial institution. In the second part of this paper, this study delves into the homilies of two influential Peruvian prelates, Mgr. Cipriani and Mgr. Castillo, representing opposing theological currents within the Catholic Church, offering a pertinent exploration of how religious institutions engage with evolving international and local trends in the context of democracy. [ABSTRACT FROM AUTHOR]
- Published
- 2024
- Full Text
- View/download PDF
35. Mapping food system drivers of the double burden of malnutrition using community-based system dynamics: a case study in Peru.
- Author
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Quinteros-Reyes, Carmen, Seferidi, Paraskevi, Guzman-Abello, Laura, Millett, Christopher, Bernabé-Ortiz, Antonio, and Ballard, Ellis
- Subjects
MALNUTRITION ,COMMUNITY-based participatory research ,FOOD quality ,PUBLIC health - Abstract
Background: Peru is facing a double burden of malnutrition (DBM), characterized by the co-existence of undernutrition and overnutrition. Double-duty actions that concurrently target common drivers of undernutrition and overnutrition, while ensuring no unintended side effects, are recommended to effectively address the DBM. To understand these complex common mechanisms and design context-specific double-duty actions, there is a need for participatory systems approaches. This paper provides a case study of applying a community-based system dynamics approach to capture stakeholder perspectives of food system drivers of the DBM in two regions in Peru. Methods: We implemented a multi-stage community-based system dynamics approach, which included processes for research capacity building for systems approaches, and the designing, piloting, and implementation of stakeholder workshops. A total of 36 stakeholders, representing diverse perspectives, participated in five group model building workshops. Stakeholder views are presented in a causal loop diagram that showcases the feedback mechanisms between key food system drivers of overweight and stunting in Peru. Results: The causal loop diagram highlights that prioritization of undernutrition over overnutrition in the policymaking process, due to Peru's historically high levels of undernutrition, may undermine action against the DBM. It also describes potential mechanisms of unintended impacts of undernutrition policies on the DBM in Peru, including impacts related to within-family distribution and quality of food provided through food assistance programs, and unintended impacts due to regional dynamics. Conclusions: This paper highlights the importance of a participatory approach to understand local needs and priorities when recommending double-duty actions in Peru and shares practical methodological guidance on applying participatory systems approaches in public health. [ABSTRACT FROM AUTHOR]
- Published
- 2024
- Full Text
- View/download PDF
36. Coastal upwelling off Peru and Mauritania inferred from helium isotope disequilibrium.
- Author
-
Steinfeldt, R., Sültenfuß, J., Dengler, M., Fischer, T., and Rhein, M.
- Subjects
UPWELLING (Oceanography) ,HELIUM isotopes ,EKMAN motion theory ,VELOCITY - Abstract
Oceanic upwelling velocities are too small to be measured directly. The surface disequilibrium of the ³He/
4 He ratio provides an indirect method to infer vertical velocities at the base of the mixed layer. Samples of helium isotopes were taken from two coastal upwelling regions, off Peru on cruise M91, and off Mauritania on 3 cruises. The helium-3 flux into the mixed layer also depends on the diapycnal mixing. Direct observations of the vertical diffusivity have been performed on all 4 cruises and are also used in this study. The resulting upwelling velocities in the coastal regions vary between 1.1 × 10-5 and 2.8 × 10-5 m s-1 for all cruises. Vertical velocities off the equator can also be inferred from the divergence of the wind driven Ekman transport. In the coastal regimes, the agreement between wind and helium derived upwelling is fairly good at least for the mean values. Further offshore, the helium derived upwelling still reaches 1 × 10-5 m s-1 , whereas the wind driven upwelling from Ekman suction is smaller by at least one order of magnitude. One reason for this difference might be eddy induced upwelling. Both advective and diffusive nutrient fluxes into the mixed layer are calculated based on the helium derived vertical velocities and the measured vertical diffusivities. The advective part of these fluxes makes up at least 50 % of the total. The nutrient flux into the mixed layer in the coastal upwelling regimes is equivalent to a net community production (NCP) of 1.3 g C m² d-1 off Peru and 1.6-1.9 g C m² d-1 off Mauritania. [ABSTRACT FROM AUTHOR]- Published
- 2015
- Full Text
- View/download PDF
37. The organic sea surface microlayer in the upwelling region off Peru and implications for air-sea exchange processes.
- Author
-
Engel, A. and Galgani, L.
- Subjects
SEA surface microlayer ,OCEAN-atmosphere interaction ,UPWELLING (Oceanography) ,BIOGEOCHEMISTRY - Abstract
The sea surface microlayer (SML) is at the very surface of the ocean, linking the hydrosphere with the atmosphere, and central to a range of global biogeochemical and climate-related processes. The presence and enrichment of organic compounds in the SML have been suggested to influence air-sea gas exchange processes as well as the emission of primary organic aerosols. Among these organic compounds, primarily of plankton origin, are dissolved exopolymers, specifically polysaccharides and proteins, and gel particles, such as Transparent Exopolymer Particles (TEP) and Coomassie Stainable Particles (CSP). These organic substances often accumulate in the surface ocean when plankton productivity is high. Here, we report results obtained in December 2012 during the SOPRAN Meteor 91 cruise to the highly productive, coastal upwelling regime off Peru. Samples were collected from the SML and from ~ 20 cm below, and were analyzed for polysaccharidic and proteinaceous compounds, gel particles, total and dissolved organic carbon, bacterial and phytoplankton abundance. Our study provides insight to the physical and biological control of organic matter enrichment in the SML, and discusses the potential role of organic matter in the SML for air-sea exchange processes. [ABSTRACT FROM AUTHOR]
- Published
- 2015
- Full Text
- View/download PDF
38. Exploratory Analysis Using Deep Learning for Water-Body Segmentation of Peru's High-Mountain Remote Sensing Images.
- Author
-
Perez-Torres, William Isaac, Uman-Flores, Diego Armando, Quispe-Quispe, Andres Benjamin, Palomino-Quispe, Facundo, Bezerra, Emili, Leher, Quefren, Paixão, Thuanne, and Alvarez, Ana Beatriz
- Subjects
BODIES of water ,FRESH water ,REMOTE-sensing images ,WATER supply ,DEEP learning - Abstract
High-mountain water bodies represent critical components of their ecosystems, serving as vital freshwater reservoirs, environmental regulators, and sentinels of climate change. To understand the environmental dynamics of these regions, comprehensive analyses of lakes across spatial and temporal scales are necessary. While remote sensing offers a powerful tool for lake monitoring, applications in high-mountain terrain present unique challenges. The Ancash and Cuzco regions of the Peruvian Andes exemplify these challenges. These regions harbor numerous high-mountain lakes, which are crucial for fresh water supply and environmental regulation. This paper presents an exploratory examination of remote sensing techniques for lake monitoring in the Ancash and Cuzco regions of the Peruvian Andes. The study compares three deep learning models for lake segmentation: the well-established DeepWaterMapV2 and WatNet models and the adapted WaterSegDiff model, which is based on a combination of diffusion and transformation mechanisms specifically conditioned for lake segmentation. In addition, the Normalized Difference Water Index (NDWI) with Otsu thresholding is used for comparison purposes. To capture lakes across these regions, a new dataset was created with Landsat-8 multispectral imagery (bands 2–7) from 2013 to 2023. Quantitative and qualitative analyses were performed using metrics such as Mean Intersection over Union (MIoU), Pixel Accuracy (PA), and F1 Score. The results achieved indicate equivalent performance of DeepWaterMapV2 and WatNet encoder–decoder architectures, achieving adequate lake segmentation despite the challenging geographical and atmospheric conditions inherent in high-mountain environments. In the qualitative analysis, the behavior of the WaterSegDiff model was considered promising for the proposed application. Considering that WatNet is less computationally complex, with 3.4 million parameters, this architecture becomes the most pertinent to implement. Additionally, a detailed temporal analysis of Lake Singrenacocha in the Vilcanota Mountains was conducted, pointing out the more significant behavior of the WatNet model. [ABSTRACT FROM AUTHOR]
- Published
- 2024
- Full Text
- View/download PDF
39. Intergenerational learning in a changing world: Knitting generations together.
- Author
-
Bjursell, Cecilia, Boström, Ann-Kristin, and Dybelius, Anders
- Subjects
KNITTING ,WESTERN civilization ,SOCIAL change ,LEARNING - Abstract
Copyright of Ricerche di Pedagogia e Didattica is the property of Universita di Bologna, Dipartimento di Scienze dell'Educazione and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
- Published
- 2023
- Full Text
- View/download PDF
40. Changes in optical characteristics of surface microlayers hint to photochemically and microbially-mediated DOM turnover in the upwelling region off Peru.
- Author
-
Galgani, L. and Engel, A.
- Subjects
UPWELLING (Oceanography) ,TRACE gases ,ORGANIC compound content of seawater ,PHOTOCHEMISTRY ,FLUOROPHORES - Abstract
The coastal upwelling system off Peru is characterized by high biological activity and a pronounced subsurface oxygen minimum zone, as well as associated emissions of atmospheric trace gases such as N
2 O, CH4 and CO2 . During the Meteor (M91) cruise to the Peruvian upwelling system in 2012, we investigated the composition of the sea-surface microlayer (SML), the oceanic uppermost boundary directly subject to high solar radiation, often enriched in specific organic compounds of biological origin like Chromophoric Dissolved Organic Matter (CDOM) and marine gels. In the SML, the continuous photochemical and microbial recycling of organic matter may strongly influence gas exchange between marine systems and the atmosphere. In order to understand organic matter cycling in surface films, we analyzed SML and underlying water samples at 38 stations determining DOC concentration, amino acid composition, marine gels, CDOM and bacterial and phytoplankton abundance as indicators of photochemical and microbial alteration processes. CDOM composition was characterized by spectral slope (S) values and Excitation-Emission Matrix fluorescence (EEMs), which allow to track changes in molecular weight (MW) of DOM, and to determine potential DOM sources and sinks. We identified five fluorescent components of the CDOM pool, of which two had excitation/emission characteristics of protein-like fluorophores and were highly enriched in the SML. CDOM composition and changes in spectral slope properties suggested a local microbial release of HMW DOM directly in the SML as a response to light exposure in this extreme environment. Our results suggest that microbial and photochemical processes play an important role for the production, alteration and loss of optically active substances in the SML. [ABSTRACT FROM AUTHOR]- Published
- 2015
- Full Text
- View/download PDF
41. THINKING THROUGH THE TOOL: COLLABORATIVE ARCHAEOLOGICAL BODYWORK IN IMMERSIVE VIRTUAL REALITY.
- Author
-
Morrow, Giles Spence and Wernke, Steven A.
- Subjects
VIRTUAL reality ,HERMENEUTICS ,ARCHAEOLOGICAL excavations ,SPACE (Architecture) ,ELECTRONIC records ,DIGITAL technology ,HUMAN body - Abstract
Copyright of Virtual Archaeology Review is the property of Virtual Archaeology Review and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
- Published
- 2024
- Full Text
- View/download PDF
42. Economic valuation of environmental and health impacts from mining: the case of Peru.
- Author
-
Mundaca, Gabriela
- Subjects
VALUATION ,STATED preference methods ,MINE safety ,MINE closures ,RURAL health ,CONSUMPTION (Economics) ,SUSTAINABLE development - Abstract
The main objective of this paper is to elicit and assess rural communities' nonmarket values of the effects of mining on their (1) health and (2) environment directly affecting their economic activities. This paper is one of very few to elicit preferences about mining in rural communities in a developing country, close to mines and exposed to mining externalities. Using stated preference methods, we find that to prevent the externalities from mining, the poorest individuals in our sample are willing to contribute average amounts equal to at least their average households' weekly consumption expenditures. Our results are useful for stakeholders. First, this sector plays an essential role in the economy of many developing countries like Peru with little diversified economies. It is critical for these governments to ensure that mining activities are sustainable to avoid conflicts of many types and at various scales. Countries like Peru cannot risk missing out on the development benefits that well-governed mining can bring to them. Second, it is also urgent for mining companies to take care not only of their carbon and water footprint, but also their impacts on the environment and livelihoods in the regions where they operate, and their contribution to attain the Sustainable Development Goals (SDGs). These issues need to be of high priority for countries that are highly dependent on mining as their trading partners implement environmental regulations. [ABSTRACT FROM AUTHOR]
- Published
- 2024
- Full Text
- View/download PDF
43. Investigating Fishing Vessel Casualties in Peru: A Technical and Scientific Review to Support New Regulations.
- Author
-
Mantari, José, Ramirez, Jorge, Figueroa, Edgardo, Huerta, Joel, Cipriano, William, Amaya, David, Cuba, Lizbeth, and Guedes Soares, Carlos
- Subjects
PERU Current ,FISHERIES ,SCIENTIFIC literature ,FISHING ,COASTAL surveillance - Abstract
The reporting system for fishing vessel and crew casualties in Peru needs a disruptive change in order to know what the risks in terms of marine safety are, who should manage them, and how they should be managed. According to a technical review on accidents recorded by the Peruvian Direction of Captaincies and Coast Guards (DICAPI), it is evident there is a need to process the available information on casualties of fishing vessels and crew in the fishing industry since this information is not easy to analyze. Nevertheless, this paper provides the casualties reported between 2004 and 2010, and from 2013 to 2020. In order to understand the research endeavors and trends surrounding the safety of fishing vessels, a systematic review using VOSviewer was performed. After a deep analysis and study of the information available in Peru, as well as reports and regulations from the International Maritime Organization (IMO), Food and Agriculture Organization (FAO), International Convention for the Safety of Life at Sea (SOLAS), and the recent advances available in the scientific literature on the safety of fishing vessels and crew casualties around the world, this paper presents some proposals regarding the current Peruvian scenario that are expected to be considered in new regulations. [ABSTRACT FROM AUTHOR]
- Published
- 2023
- Full Text
- View/download PDF
44. Nitrogen cycling in shallow low oxygen coastal waters off Peru from nitrite and nitrate nitrogen and oxygen isotopes.
- Author
-
Hu, H., Bourbonnais, A., Larkum, J., Bange, H. W., and Altabet, M. A.
- Subjects
NITROGEN cycle ,OXYGEN in water ,NITROGEN isotopes ,ISOTOPIC fractionation - Abstract
O
2 minimum zones (OMZ) of the world's oceans are important locations for microbial dissimilatory NO3 - reduction and subsequent loss of combined nitrogen (N) to biogenic N2 gas. This is particularly so when the OMZ is coupled to a region of high productivity leading to high rates of N-loss as found in the coastal upwelling region off Peru. Stable N isotope ratios (and O in the case of NO3 - and NO2 - ) can be used as natural tracers of OMZ N-cycling because of distinct kinetic isotope effects associated with microbiallymediated N-cycle transformations. Here we present NO2 - and NO3 - stable isotope data from the nearshore upwelling region off Callao, Peru. Subsurface O2 was generally depleted below about 30m depth with O2 less than 10 µM, while NO2 - concentrations were high, ranging from 6 to 10 µM and NO3 - was in places strongly depleted to near 0 µM. We observed for the first time, a positive linear relationship between NO2 - δ15 N and δ18 O at our coastal stations, analogous to that of NO3 - N and O isotopes during assimilatory and dissimilatory reduction. This relationship is likely the result of rapid NO2 - turnover due to higher organic matter flux in these coastal upwelling waters. No such relationship was observed at offshore stations where slower turnover of NO2 - facilitates dominance of isotope exchange with water. We also evaluate the overall isotope fractionation effect for N-loss in this system using several approaches that vary in their underlying assumptions. While there are differences in apparent fractionation factor (ε) for N-loss as calculated from the δ15 N of [NO3 - ], DIN, or biogenic N2 , values for " are generally much lower than previously reported, reaching as low as 6.5 ‰. A possible explanation is the influence of sedimentary N-loss at our inshore stations which incurs highly suppressed isotope fractionation. [ABSTRACT FROM AUTHOR]- Published
- 2015
- Full Text
- View/download PDF
45. Peru upwelling plankton respiration: calculations of carbon flux, nutrient retention efficiency and heterotrophic energy production.
- Author
-
Packard, T. T., Osma, N., Fernández-Urruzola, I., Codispoti, L. A., Christensen, J. P., and Gómez, M.
- Subjects
UPWELLING (Oceanography) ,PLANKTON ,RESPIRATION in plants ,HETEROTROPHIC respiration ,PLANT nutrients - Abstract
Oceanic depth profiles of plankton respiration are described by a power function, ... similar to the vertical carbon flux profile. Furthermore, because both ocean processes are closely related, conceptually and mathematically, each can be calculated from the other. The exponent (F
C ), always negative, defines the maximum curvature of the respiration depth-profile and controls the carbon flux. When b is large, the C flux (FC ) from the epipelagic ocean is low and the nutrient retention efficiency (NRE) is high allowing these waters to maintain high productivity. The opposite occurs when b is small. This means that the attenuation of respiration in ocean water columns is critical in understanding and predicting both vertical FC as well as the capacity of epipelagic ecosystems to retain their nutrients. The NRE is a new metric defined as the ratio of nutrient regeneration in a seawater layer to the nutrients introduced into that layer via FC . A depth-profile of F is the integral of water column respiration. This relationship facilitates calculating ocean sections of FC from water column respiration. In a FC section across the Peru upwelling system we found a FC maximum extending down to 400m, 50 km off the Peru coast. Finally, coupling respiratory electron transport system activity to heterotrophic oxidative phosphorylation promoted the calculation of an ocean section of heterotrophic energy production (HEP). It ranged from 250 to 500 Jd-1 m-3 in the euphotic zone, to less than 5 Jd-1 m-3 below 200m on this ocean section. [ABSTRACT FROM AUTHOR]- Published
- 2014
- Full Text
- View/download PDF
46. On the need to integrate interannual natural variability into coastal multihazard assessments.
- Author
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Odériz, I., Losada, I. J., Silva, R., and Mori, N.
- Subjects
ANTARCTIC oscillation ,EL Nino ,ARCTIC oscillation ,MODES of variability (Climatology) ,OCEAN wave power ,HAZARD mitigation - Abstract
The co-occurrence of multiple hazards can either exacerbate or mitigate risks. The interrelationships between multiple hazards greatly depend on the spatiotemporal scale and can be difficult to detect from large to local scales. In this paper, we identified coastal regions worldwide where the leading tropical (El Niño-Southern Oscillation, ENSO) and polar (Arctic Oscillation, AO; Southern Annular Mode, SAM) modes of climate variability simultaneously modify the seasonal conditions of multiple hazards, including the near-surface wind speed and swell and wind-sea wave powers. We classified the results at the national and municipal levels, with a focus on multiple hazards simultaneously occurring in space and time. The results revealed that the ENSO modulates multiple hazards, affecting approximately 40% of coastal countries, while the polar annular modes affect approximately 30% of coastal countries. The ENSO induced a greater diversity of multiple hazards, with Asian countries (e.g., Indonesia experienced increases of + 2% in wind and + 7% in swell) and countries in the Americas (e.g., Peru exhibited increases of + 1.5% in wind and + 6% in wind-sea) the most notably affected. The SAM imposed a greater influence on swells in the eastern countries of ocean basins (+ 2.5% in Chile) than in other countries, while the influence of the AO was greater in Norway and the UK (+ 12% for wind-sea and 8% for swell). Low-lying islands exhibited notable variations in pairwise hazards between phases and seasons. Our results could facilitate the interpretation of multihazard interactions and pave the way for a wide range of potential implementations of different coastal industries. [ABSTRACT FROM AUTHOR]
- Published
- 2024
- Full Text
- View/download PDF
47. Subnational Oil Resource Governance after the Commodity Boom: The Making and Limitations of Peru's Closing Development Gaps Plan.
- Author
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Arce, Moises, Franco, Omar Awapara, and Merino, Roger
- Subjects
INDIGENOUS peoples of South America ,ENERGY minerals ,INDIGENOUS peoples ,PETROLEUM ,DISTRIBUTION costs - Abstract
To meet the growing global demand for minerals and new energy sources, governments in the Global South advance policy interventions to improve the unequal distribution of the cost and benefits of resource extraction. This paper explains the politics behind the implementation of the Closing Development Gaps (CDG) Plan, a new redistributive plan on behalf of Amazonian Indigenous peoples near the oil circuit in the Loreto region of Peru. It emphasizes the long-lasting impact of mobilizing strategies of indigenous organizations, which relayed critical information to policymakers about the claims both old and new of Indigenous peoples neighboring the oil circuit. It also draws attention to the permeability of state institutions, which allowed newer state agencies with distinct policy streams to advance new solutions to old problems. While the CDG Plan seeks to improve resource governance by focusing on infrastructure gaps (e.g., water and sanitation, electrification), it excludes the "political gaps" and the most contentious claims related to the environment that have moved Amazonian Indigenous peoples into struggle in recent years. [ABSTRACT FROM AUTHOR]
- Published
- 2024
- Full Text
- View/download PDF
48. Comparison of the Stress and Anxiety to Viral Epidemic-9 and SAVE-6 scales among healthcare workers in Peru.
- Author
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Gamonal, Bryan, Quispe-Lizano, Rogelio, Javier-Murillo, Nair, Lapeyre-Rivera, André, Perea-Flórez, Francisco, Velásquez-Rimachi, Víctor, Alva-Diaz, Carlos, Velazco-Gonzales, Gilberth, Ahmed, Oli, and Seockhoon Chung
- Subjects
MEDICAL personnel ,ITEM response theory ,ANXIETY ,CONFIRMATORY factor analysis ,TEST anxiety - Abstract
Introduction: Peru is a country that has a high incidence of viral outbreaks and epidemics, which is why it is necessary to validate a scale that measures anxiety and stress in professionals who are on the front lines of these events. Therefore, our objective was to validate the Peruvian-Spanish version of the Stress and Anxiety to Viral Epidemics-9 items (SAVE-9) scale and to concurrently compare its validity and internal consistency with the SAVE-6 scale among healthcare workers (HCWs). Materials and methods: We conducted a cross-sectional study based on data collected from a self-reported survey in paper-and-pencil format between April and July 2023. A total of 203 HCWs participated in the research. We developed a confirmatory factor analysis (CFA) and item response theory (IRT). We calculated Cronbach’s a coefficient and McDonald’s w to assess the internal consistency of the scales. Results: The results show that SAVE-9 (a two-factor model) and SAVE-6 (a one factor model) provided an excellent fit in the confirmatory factor analysis. Both scales demonstrated strong internal consistency (Cronbach’s a 0.85 and 0.86, respectively). Significant correlations were found between the SAVE-9 and SAVE6 scales and Generalized Anxiety Disorder-7 items scale (r = 0.44 and r = 0.38, respectively, p < 0.001) as well as the Patient Health Questionnaire-9 items (r = 0.39 and r = 0.35, respectively, p < 0.001). The optimal cutoff points for SAVE-9 and SAVE-6 were identified for assessing anxiety, aligned with a GAD-7 score ≥5 points. Conclusion: The Peruvian-Spanish SAVE-9 and SAVE-6 scales are reliable and valid rating scales to assess the anxiety response of HCWs in response to viral epidemics. Though COVID-19 is diminished, these scales will be useful for other viral epidemics in the future. [ABSTRACT FROM AUTHOR]
- Published
- 2024
- Full Text
- View/download PDF
49. Gold Supply Chain Opacity and Illicit Activities: Insights from Peru and Kenya.
- Author
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Smith, Nicole M., Seguin, Kady, Saka, U. Mete, Duzgun, Sebnem, Smith-Roberts, Ashley, Soud, David, and White, Jenna
- Subjects
SUPPLY chains ,GOLD ,GOLD jewelry ,FIELD research ,INTERNAL revenue - Abstract
Illicit gold flows constitute a major development challenge for governments and a social responsibility challenge for many industries along gold supply chains, including gold refiners and jewelry retailers. This paper highlights aspects of gold supply chains that lack transparency and may indicate junctures where illicit activities are taking place, resulting in a loss of tax and customs revenues. Using Peru and Kenya as case study countries, we draw from United Nations Comtrade data and qualitative data from field research to examine the magnitude of the gold trade, the forms in which gold is traded, discrepancies in reported trade data, and key trade partners for each country. We suggest that certain portions of gold supply chains should be given more attention, some types of gold exports and imports present greater traceability challenges than others, and some countries play a much more significant role in the global gold trade. We propose areas where further investigations may be warranted to ensure more transparent and responsible gold supply chains. [ABSTRACT FROM AUTHOR]
- Published
- 2024
- Full Text
- View/download PDF
50. The role of benthic foraminifera in the benthic nitrogen cycle of the Peruvian oxygen minimum zone.
- Author
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Glock, N., Schönfeld, J., Eisenhauer, A., Hensen, C., Mallon, J., and Sommer, S.
- Subjects
FORAMINIFERA ,BENTHIC ecology ,ATMOSPHERIC oxygen ,PROKARYOTES ,NITROGEN cycle ,BIOGEOCHEMICAL cycles - Abstract
The discovery that foraminifera are able to use nitrate instead of oxygen as energy source for their metabolism has challenged our understanding of nitrogen cycling in the ocean. It was evident before that only prokaryotes and fungi are able to denitrify. Rate estimates of foraminiferal denitrification were very sparse on a regional scale. Here, we present estimates of benthic foraminiferal denitrification rates from six stations at intermediate water depths in and below the Peruvian oxygen minimum zone (OMZ). Foraminiferal denitrification rates were calculated from abundance and assemblage composition of the total living fauna in both, surface and subsurface sediments, as well as from individual species specific denitrification rates. A comparison with total benthic denitrification rates as inferred by biogeochemical models revealed that benthic foraminifera account for the total denitrification on the shelf between 80 and 250m water depth. They are still important denitrifiers in the centre of the OMZ around 320m (29-56% of the benthic denitrification) but play only a minor role at the lower OMZ boundary and below the OMZ between 465 and 700m (3-7% of total benthic denitrification). Furthermore, foraminiferal denitrification was compared to the total benthic nitrate loss measured during benthic chamber experiments. Foraminiferal denitrification contributes 1 to 50% to the total nitrate loss across a depth transect from 80 to 700m, respectively. Flux rate estimates ranged from 0.01 to 1.3 mmol m
-2 d-1 . Fur- thermore we show that the amount of nitrate stored in living benthic foraminifera (3 to 705 µmol L-1 ) can be higher by three orders of magnitude as compared to the ambient pore waters in near surface sediments sustaining an important nitrate reservoir in Peruvian OMZ sediments. The substantial contribution of foraminiferal nitrate respiration to total benthic nitrate loss at the Peruvian margin, which is one of the main nitrate sink regions in the world oceans, underpins the importance of previously underestimated role of benthic foraminifera in global biochemical cycles. [ABSTRACT FROM AUTHOR]- Published
- 2012
- Full Text
- View/download PDF
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