28 results on '"coastal islands"'
Search Results
2. Beneficial use of sediments to restore a Chesapeake Bay marsh island
- Author
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Jenny Davis, Paula Whitfield, Ryan Giannelli, Rebecca Golden, Michael Greene, Leanne Poussard, and Matthew Whitbeck
- Subjects
natural infrastructure ,nature based solutions ,beneficial use ,coastal islands ,salt marsh ,habitat restoration ,Economic theory. Demography ,HB1-3840 - Abstract
Despite rapidly expanding interest in the use of natural coastal habitats for their ability to protect against erosion and flooding, implementation of coastal natural infrastructure (NI) projects has been limited to date. Uncertainty over how the benefits of NI will change over time as they mature and adapt to changing environmental drivers, and a lack of well-documented demonstrations of NI, are often cited as roadblocks to their widespread acceptance. Here, we begin to fill that knowledge gap by describing implementation and early (3 years post-implementation) monitoring results of an NI project at Swan Island, MD. Swan is an uninhabited marsh island in mid-Chesapeake Bay, United States whose position renders it a natural wave break for the downwind town of Ewell, MD. Prior to project implementation, Swan had experienced significant losses in areal extent due to subsidence and erosion. To reverse this trend, the island was amended with dredged sediments in the winter of 2018–2019. The overarching goal was to preserve the Island’s ability to serve as a wave break and make it more resilient to future sea level rise by increasing the elevation of the vegetated platform, while also increasing the diversity of habitats present. A monitoring program was implemented immediately after sediment placement to document changes in the island footprint and topography over time and to evaluate the extent to which project goals are met. Data from the initial three years of this effort (2019 through 2022) indicate an island that is still actively evolving, and point to the need for rapid establishment of vegetative communities to ensure success of coastal NI.
- Published
- 2024
- Full Text
- View/download PDF
3. Using RS and GIS Techniques to Assess and Monitor Coastal Changes of Coastal Islands in the Marine Environment of a Humid Tropical Region.
- Author
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Chettiyam Thodi, Muhamed Fasil, Gopinath, Girish, Surendran, Udayar Pillai, Prem, Pranav, Al-Ansari, Nadhir, and Mattar, Mohamed A.
- Subjects
SHORELINES ,GEOGRAPHIC information systems ,SUSTAINABILITY ,ISLANDS ,MARINE transgression ,SHORELINE monitoring - Abstract
Vypin, Vallarpadam, and Bolgatty are significant tropical coastal islands situated in the humid tropical Kerala region of India, notable for their environmental sensitivity. This study conducted a comprehensive assessment of shoreline alterations on these islands by integrating Remote Sensing (RS) and Geographic Information Systems (GIS) techniques. Utilizing satellite imagery from the LANDSAT series with a spatial resolution of 30 m, the analysis spanned the years from 1973 to 2019. The Digital Shoreline Analysis System (DSAS) tool, integrated into the ArcGIS software, was employed to monitor and analyze shoreline shifts, encompassing erosion and accretion. Various statistical parameters, including Net Shoreline Movement (NSM), End Point Rate (EPR), and Linear Regression Rate (LRR), were utilized to evaluate these changes. Additionally, the study aimed to discern the root causes of shoreline modifications in the study area, encompassing disturbances and the construction of new structures on these islands. The results conclusively demonstrated the substantial impact endured by these coastal islands, with accretion on both sides leading to the creation of new landmasses. This manuscript effectively illustrates that these islands have experienced marine transgression, notably evidenced by accretion. Anthropogenic activities were identified as the primary drivers behind the observed shoreline changes, underscoring the need for careful management and sustainable practices in these fragile coastal ecosystems. [ABSTRACT FROM AUTHOR]
- Published
- 2023
- Full Text
- View/download PDF
4. Application of Remote Sensing to Study the Behavior and Dynamics of Riverine and Coastal Chars
- Author
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Huque, Iffat, Sarker, Maminul Haque, Oberhagemann, Knut, Brilly, Mitja, Advisory Editor, Davis, Richard A., Advisory Editor, Hoalst-Pullen, Nancy, Advisory Editor, Leitner, Michael, Advisory Editor, Patterson, Mark W., Advisory Editor, Veress, Márton, Advisory Editor, Zaman, Mohammad, editor, and Alam, Mustafa, editor
- Published
- 2021
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- View/download PDF
5. Oceanographic gradients explain changes in the biological traits of nesting seabird assemblages across the south-eastern Pacific
- Author
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Joao B. Gusmao, Guillermo Luna-Jorquera, and Marcelo M. Rivadeneira
- Subjects
macroecology ,functional diversity (FD) ,trait diversity ,oceanic islands ,coastal islands ,RLQ ,Science ,General. Including nature conservation, geographical distribution ,QH1-199.5 - Abstract
Seabirds are top predators in coastal and pelagic ecosystems that forage at sea but return to land regularly during the breeding season (i.e., central place foragers). This unique life history strategy is directly related to their biological traits and helps define their role as top predators in marine systems. We analysed the effects of physiographic characteristics of nesting islands (area, elevation, and distance from the continent, as predicted by the General Dynamic Model of Oceanic Island Biogeography) and oceanographic variables from waters surrounding nesting islands that tend to be characterised by steep gradients (temperature, salinity, and primary productivity) on the trait diversity of nesting seabird assemblages on islands of the south-eastern Pacific Ocean. Four biological traits related to species’ life history and feeding strategy were used to calculate two indices, the Functional Richness and Rao’s Quadratic entropy. We used fourth-corner and RLQ analysis to determine the relationship between biological traits and environmental variables. Island physiography and primary productivity in the waters surrounding nesting islands significantly affected seabird trait diversity, which gradually decreased from Chilean coastal islands to the distant Polynesian Islands. The traits for body mass and clutch size showed a significant positive relationship with primary productivity. We identified three assemblages of seabirds that had contrasting trait structures. These were defined as the Galapagos, Coastal Chile, and south-eastern Oceanic islands assemblages, and reflected the adaptations of three different species pools to specific oceanographic conditions. Our results suggest that food-related constraints might be one of the most critical environmental filters that shaped the current trait structure of nesting seabird assemblages on the islands in the eastern South Pacific Ocean.
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- 2022
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- View/download PDF
6. The role of island physiography and oceanographic factors in shaping species richness and turnover of nesting seabird assemblages on islands across the south‐eastern Pacific.
- Author
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Gusmao, Joao B., Luna‐Jorquera, Guillermo, Fernández, Claudia, Luna, Nicolás, Plaza, Paula, Portflitt‐Toro, Matías, Serratosa, Juan, Nuñez, Pamela, Varela, Andrea I., and Rivadeneira, Marcelo M.
- Subjects
- *
SPECIES diversity , *GEOMORPHOLOGY , *ONLINE databases , *ENVIRONMENTAL reporting , *SURFACE temperature - Abstract
Aim: For seabirds, food supplies and nest sites are largely driven by oceanographic gradients and island habitats, respectively. Research into seabirds' ecological roles in insular ecosystems is crucial to understanding processes that structure seabird nesting assemblages. We examined the influence of island physiography and oceanographic factors on the spatial variation in α‐ and β‐diversity of nesting seabird assemblages. Location: South‐eastern Pacific Ocean. Taxon: Birds. Methods: We compiled data from 53 seabirds breeding on 41 coastal and oceanic islands using different sources: our field records, online databases, environmental reports and literature. We used generalized linear models (GLM) to describe the effect of island physiography (area, elevation and isolation) and oceanographic factors (surface temperature, salinity and primary productivity) on seabird species richness (α‐diversity). We applied multivariate GLM to test the effects of physiographic and oceanographic predictors on species composition (β‐diversity). We used Jaccard dissimilarities on species occurrences per island to calculate β‐diversity partitioned into turnover and nestedness. Polynomial models allowed us to model these metrics against geographical and environmental gradients and so analyse patterns in seabird β‐diversity across spatial scales. Results: Species richness was highest in Galápagos, Pitcairn and Rapa Nui. Changes in seabird α‐diversity across islands were determined by island area and distance to South America but not by oceanographic variables. Physiographic and oceanographic factors were significant in determining β‐diversity. Changes in β‐diversity were mostly due to species replacement (β‐turnover) across three major island Systems (Galápagos Archipelago, Chilean coastal islands and oceanic islands of the south‐eastern Pacific). The contribution of β‐nestedness was restricted to small scales (within archipelagos). Main conclusions: Physiographic and oceanographic factors explain species diversity of seabird assemblages on islands of the south‐eastern Pacific. Oceanographic variables did not affect species richness but significantly influenced species composition. Change in species composition reflects gradients across three marine biogeographical realms: Temperate South, Eastern Indo‐Pacific and Tropical Eastern Pacific. The low degree of species nestedness may reflect multiple evolutionary origins. [ABSTRACT FROM AUTHOR]
- Published
- 2020
- Full Text
- View/download PDF
7. 中国东南部主要海岛植物地理分布特点及其影响因素.
- Author
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张 梅, 季长波, 王 鹏, 宋 宇, 张彦文, and 刘 利
- Abstract
Copyright of Journal of Xinyang Normal University Natural Science Edition is the property of Journal of Xinyang Normal University Editorial Office 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
- 2020
- Full Text
- View/download PDF
8. Islands of Coastal Karnataka - A Unique Journey of Discovery.
- Author
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SRIDHAR, R., SACHITHANANDAM, V., MANMADHAN, K., and SWARNAKUMAR, N. S.
- Abstract
This article summarises various information on coastal islands of Karnataka to develop a baseline information structure which will be useful for the purpose of conservation and development planning through the applicable regulatory mechanisms. First, the islands were identified with the help of bhuvan database and satellite imageries and verified with google images for mapping purpose and they have been classified as inhabited islands, un-inhabited islands, and islets/rocky outcrops. The details of geography, demography, shoreline characteristics, transportation, agriculture & industrial activities, biodiversity and, environmental issues & hazards pertaining to individual islands were collected and attempted to compile to provide comprehensive information in one compendium. Also, the information on ecologically sensitive areas and geomorphological features of coastal zone of Karnataka were presented along with tourism creating potential of the places. This baseline information on coastal islands provided in this work would serve as a useful reference for planners, policy makers, academicians and all those interested in becoming familiar with the coastal islands of Karnataka. [ABSTRACT FROM AUTHOR]
- Published
- 2019
9. Assessing the Link between Human Modification and Changes in Land Surface Temperature in Hainan, China Using Image Archives from Google Earth Engine
- Author
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Lixia Chu, Francis Oloo, Helena Bergstedt, and Thomas Blaschke
- Subjects
human modification ,land surface temperature ,temperature zones ,coastal islands ,Science - Abstract
In many areas of the world, population growth and land development have increased demand for land and other natural resources. Coastal areas are particularly susceptible since they are conducive for marine transportation, energy production, aquaculture, marine tourism and other activities. Anthropogenic activities in the coastal areas have triggered unprecedented land use change, depletion of coastal wetlands, loss of biodiversity, and degradation of other vital ecosystem services. The changes can be particularly drastic for small coastal islands with rich biodiversity. In this study, the influence of human modification on land surface temperature (LST) for the coastal island Hainan in Southern China was investigated. We hypothesize that for this island, footprints of human activities are linked to the variation of land surface temperature, which could indicate environmental degradation. To test this hypothesis, we estimated LST changes between 2000 and 2016 and computed the spatio-temporal correlation between LST and human modification. Specifically, we classified temperature data for the four years 2000, 2006, 2012 and 2016 into 5 temperature zones based on their respective mean and standard deviation values. We then assessed the correlation between each temperature zone and a human modification index computed for the year 2016. Apart from this, we estimated mean, maximum and the standard deviation of annual temperature for each pixel in the 17 years to assess the links with human modification. The results showed that: (1) The mean LST temperature in Hainan Island increased with fluctuations from 2000 to 2016. (2) The moderate temperature zones were dominant in the island during the four years included in this study. (3) A strong positive correlation of 0.72 between human modification index and mean and maximum LST temperature indicated a potential link between human modification and mean and maximum LST temperatures over the 17 years of analysis. (4) The mean value of human modification index in the temperature zones in 2016 showed a progressive rise with 0.24 in the low temperature zone, 0.33 in the secondary moderate, 0.45 in the moderate, 0.54 in the secondary high and 0.61 in the high temperature zones. This work highlighted the potential value of using large and multi-temporal earth observation datasets from cloud platforms to assess the influence of human activities in sensitive ecosystems. The results could contribute to the development of sustainable management and coastal ecosystems conservation plans.
- Published
- 2020
- Full Text
- View/download PDF
10. Analysis of Climate Change Induced Parameters of South-Eastern Coastal Islands of Bangladesh: Comparison from 1977 to 2017
- Author
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Barua, Prabal, Rahman, Syed Hafizur, Molla, Morshed Hossan, Barua, Prabal, Rahman, Syed Hafizur, and Molla, Morshed Hossan
- Abstract
Climate change is one of the biggest threats for the new millennium, and Bangladesh is considered as "Poster Child" as an impact on climate change in the world. The main focus of this study is to investigate the changing pattern of climate parameters, particularly temperature, rainfall, humidity, cloud coverage, and wind speed in two coastal islands of the southeastern coast of Bangladesh from 1977 to 2017. The linear regression model described that the temperature in Kutubdia and Sandwip islands was 0.0298 and 0.0444 times increased from 1977 to 2017. Besides, rainfall patterns in Kutubdia decreased by 0.4083, and Sandwip Islands increased by 0.875 every year from its previous counterpart. The humidity level also increased due to the rise of temperature and water availability for evaporation from irrigation. Moreover, significant changes in wind speed and the cloud coverage rate in the Island areas increased with the increasing value of temperature and humidity. It also means the rainfall rate increases with cloud cover in the sky. However, the study found decreasing rates of bright sunshine in the Island areas. The declining rate of sunshine is very high and is a matter of great concern for the agriculture and health sectors in particular areas. Therefore, the community's concept of climate parameters, association, and extremes is well apparent. Identify poor land use planning as the primary anthropogenic driver of the change, and they advocated boosting the capacity of linked fields that are in danger owing to climate change. To conclude, the coastal inhabitants recommended that taking preparedness would be easier if the information transmitted through quicker and reliable sources such as news broadcasts, phone messages, or the internet.
- Published
- 2022
11. The vascular flora and vegetation of Queimada Grande Island, São Paulo State,southeastern Brazil.
- Author
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Coutinho Kurtz, Bruno, Castro Souza, Vinicius, Melo Magalhães, Adriana, de Paula-Souza, Juliana, Romariz Duarte, Alexandre, and Oliveira Joaquim-Jr., Gilberto
- Subjects
- *
BIODIVERSITY conservation , *PROTECTED areas - Abstract
Studies of the vegetation on islands off the coast of southeastern Brazil are still very scarce, despite their importance for assessing, managing, and conserving insular biodiversity. We present here a list of the vascular flora of Queimada Grande Island (QGI; 24°29'10" S, 46°40'30" W, 57 ha, 33.2 km from the coast) in southeastern Brazil and describe its phytophysiognomies. The island is covered mainly by Atlantic Forest (Dense Ombrophilous Forest), as well as with rock outcrop and anthropogenic vegetation with herbaceous-shrub phytophysiognomies. QGI showed relatively low species richness (S = 125) when compared to other Brazilian coastal islands. Herbaceous (52) and climbing species (31) predominated on QGI. The richest families were Fabaceae (11 species), Poaceae (9), and Apocynaceae, Asteraceae and Orchidaceae (8 species each). Most species (S = 112) are autochthonous from different phytophysiognomies of the southeastern Brazilian Atlantic Forest complex. Many species associated with anthropically disturbed areas (S = 26) can be found on QGI, including the invasive grass Melinis minutiflora. There was a slight predominance of zoochory (S = 50). We did not identify any species endemic to QGI. One of its species (Cattleya intermedia, Orchidaceae) is vulnerable at both national and regional levels, and another (Barrosoa apiculata, Asteraceae) is presumably extinct on the mainland in São Paulo State. The vascular flora of QGI originated from the mainland Atlantic Forest complex, following the pattern of other coastal islands in southeastern Brazil. The flora and vegetation of QGI reflect the combination of insular conditions, the small size of the island, habitat restriction, steep topography, incipient soils, and the past use of the area with the introduction of several foreign species. We recommend permanent monitoring of the vegetation cover of QGI and its management, in order to ensure the conservation of the local native biota. [ABSTRACT FROM AUTHOR]
- Published
- 2017
- Full Text
- View/download PDF
12. Environmental sensitivity of the coastal islands of Ubatuba, SP, Brazil (pt)
- Author
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Carolina Rodrigues Bio Poletto, Getulio Teixeira Batista
- Subjects
Environmental Sensitivity Index ,Oil Spill ,Coastal Islands ,Coastal Islands. ,Environmental sciences ,GE1-350 - Abstract
The Environmental Sensitivity Index Maps for Oil Spills (ESI Maps, or SAO inPortuguese) constitute an essential component and source of basic information for emergency planning, response decision support and damage evaluation in case of oil spills. This studyaims at the elaboration of sensitivity maps for oil spills for the islands within the Ubatubamunicipality, north coast of the State of São Paulo. The adopted methodology is based on theTechnical Specifications for the production of Environmental Sensitivity Maps for oil spills(SAO maps) proposed by the Brazilian Ministry of Environment. The study involved thegathering of secondary data, followed by field work carried out in the summer and winterperiods of 2007; the elaboration of the cartographic base maps and, finally, the integration ofthe data to a GIS (Geographic Information System). As a result it was registered and mappedthe physical (geology, geomorphology, oceanography and climatology), biological (fauna,flora and coastal environments) and socioeconomic (anthropic influence, human use, artificialstructures and impacts) resources of Ubatuba coastal islands. Eleven beaches have beenidentified, located at six islands, with distinct topographic and geomorphologic features. Thebeaches were classified with sensitivity index 4, because they are sheltered from actions ofwaves and currents. Most of the mapped environments (44.8%) were classified withsensitivity index 8, indicating high sensitivity of the islands. The oil spill impacts on coastalenvironments can be significantly minimized during the contingency actions when previousknowledge of the ecosystems that compose the islands environment is available, especiallywhen it is integrated into GIS data basis, capable of displaying easy-to-use maps. Theenvironmental sensitivity mapping is an important management instrument, especially whendealing with sensible and poorly studied areas such as the islands of Ubatuba.
- Published
- 2008
13. Environmental sensitivity of the coastal islands of Ubatuba, SP, Brazil
- Author
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Getulio Teixeira Batista and Carolina Rodrigues Bio Poletto
- Subjects
Environmental Sensitivity Index ,Oil Spill ,Coastal Islands ,Environmental sciences ,GE1-350 - Abstract
The Environmental Sensitivity Index Maps for Oil Spills (ESI Maps, or SAO in Portuguese) constitute an essential component and source of basic information for emergency planning, response decision support and damage evaluation in case of oil spills. This study aims at the elaboration of sensitivity maps for oil spills for the islands within the Ubatuba municipality, north coast of the State of São Paulo. The adopted methodology is based on the Technical Specifications for the production of Environmental Sensitivity Maps for oil spills (SAO maps) proposed by the Brazilian Ministry of Environment. The study involved the gathering of secondary data, followed by field work carried out in the summer and winter periods of 2007; the elaboration of the cartographic base maps and, finally, the integration of the data to a GIS (Geographic Information System). As a result it was registered and mapped the physical (geology, geomorphology, oceanography and climatology), biological (fauna, flora and coastal environments) and socioeconomic (anthropic influence, human use, artificial structures and impacts) resources of Ubatuba coastal islands. Eleven beaches have been identified, located at six islands, with distinct topographic and geomorphologic features. The beaches were classified with sensitivity index 4, because they are sheltered from actions of waves and currents. Most of the mapped environments (44.8%) were classified with sensitivity index 8, indicating high sensitivity of the islands. The oil spill impacts on coastal environments can be significantly minimized during the contingency actions when previous knowledge of the ecosystems that compose the islands environment is available, especially when it is integrated into GIS data basis, capable of displaying easy-to-use maps. The environmental sensitivity mapping is an important management instrument, especially when dealing with sensible and poorly studied areas such as the islands of Ubatuba.
- Published
- 2008
- Full Text
- View/download PDF
14. Um estudo sobre as atividades turísticas em seis ilhas brasileiras.
- Author
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Araujo Carvalho, Rita Gabriela, Decol, Felipe, Gil, Lucas Fruet, and Lanzer, Rosane Maria
- Abstract
Copyright of Revista Brasileira de Pesquisa em Turismo is the property of Associacao Nacional de Pesquisa e Pos-Graduacao em Turismo 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
- 2016
- Full Text
- View/download PDF
15. Negative impacts of sea-level rise on soil microbial involvement in carbon metabolism.
- Author
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Zhang, Juanjuan, Fu, Qi, Huang, Yu, Fan, Yuxuan, Liang, Minxia, Chen, Huaihai, and Yu, Shixiao
- Published
- 2022
- Full Text
- View/download PDF
16. Assessing the Link between Human Modification and Changes in Land Surface Temperature in Hainan, China Using Image Archives from Google Earth Engine
- Author
-
Blaschke, Lixia Chu, Francis Oloo, Helena Bergstedt, and Thomas
- Subjects
human modification ,land surface temperature ,temperature zones ,coastal islands - Abstract
In many areas of the world, population growth and land development have increased demand for land and other natural resources. Coastal areas are particularly susceptible since they are conducive for marine transportation, energy production, aquaculture, marine tourism and other activities. Anthropogenic activities in the coastal areas have triggered unprecedented land use change, depletion of coastal wetlands, loss of biodiversity, and degradation of other vital ecosystem services. The changes can be particularly drastic for small coastal islands with rich biodiversity. In this study, the influence of human modification on land surface temperature (LST) for the coastal island Hainan in Southern China was investigated. We hypothesize that for this island, footprints of human activities are linked to the variation of land surface temperature, which could indicate environmental degradation. To test this hypothesis, we estimated LST changes between 2000 and 2016 and computed the spatio-temporal correlation between LST and human modification. Specifically, we classified temperature data for the four years 2000, 2006, 2012 and 2016 into 5 temperature zones based on their respective mean and standard deviation values. We then assessed the correlation between each temperature zone and a human modification index computed for the year 2016. Apart from this, we estimated mean, maximum and the standard deviation of annual temperature for each pixel in the 17 years to assess the links with human modification. The results showed that: (1) The mean LST temperature in Hainan Island increased with fluctuations from 2000 to 2016. (2) The moderate temperature zones were dominant in the island during the four years included in this study. (3) A strong positive correlation of 0.72 between human modification index and mean and maximum LST temperature indicated a potential link between human modification and mean and maximum LST temperatures over the 17 years of analysis. (4) The mean value of human modification index in the temperature zones in 2016 showed a progressive rise with 0.24 in the low temperature zone, 0.33 in the secondary moderate, 0.45 in the moderate, 0.54 in the secondary high and 0.61 in the high temperature zones. This work highlighted the potential value of using large and multi-temporal earth observation datasets from cloud platforms to assess the influence of human activities in sensitive ecosystems. The results could contribute to the development of sustainable management and coastal ecosystems conservation plans.
- Published
- 2020
- Full Text
- View/download PDF
17. Melanistic Diversity in the Maritime Gartersnake, Thamnophis sirtalis pallidulus, in Nova Scotia, Canada.
- Author
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GILHEN, JOHN and SCOTT, FRED W.
- Abstract
We describe an unusual diversity of melanistic conditions in populations of the Maritime Gartersnake, Thamnophis sirtalis pallidulus, in Nova Scotia: pure melanism, melanism, nigrismus (predominantly melanistic), abundismus (mosaic melanism). This variability is widespread in Nova Scotia, and it includes coastal islands. [ABSTRACT FROM AUTHOR]
- Published
- 2014
- Full Text
- View/download PDF
18. Assessing coastal island vulnerability in the Sundarban Biosphere Reserve, India, using geospatial technology
- Author
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Sahana, Mehebub, Hong, Haoyuan, Ahmed, Raihan, Patel, Priyank Pravin, Bhakat, Priya, and Sajjad, Haroon
- Published
- 2019
- Full Text
- View/download PDF
19. A survey of cryptosporidiosis among 2,541 residents of 25 coastal islands in Jeollanam-do (Province), Republic of Korea.
- Author
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Park, Jae-Hwan, Hyo-Jin Kim, Sang-Mee Guk, Eun-Hee Shin, Jae-Lip Kim, Han-Jong Rim, Soon-Hyung Lee, and Jong-Yil Chai
- Subjects
CRYPTOSPORIDIOSIS ,FECES examination ,CRYPTOSPORIDIUM ,MICROSCOPY - Abstract
In order to determine the distribution and prevalence of human cryptosporidiosis on western and southern coastal islands of Jeollanam-do (Province), fecal samples were collected from 2,541 people residing on 25 islands, 13 in the western coasts and 12 in the southern coasts, during July and August 2000. Fecal smears were prepared following formalin-ether sedimentation of the samples and stained by a modified acid-fast procedure. The presence of Cryptosporidium oocysts was determined by light microscopy. Cryptosporidium oocysts were detected in 38 specimens (1.5%). The oocyst positive rate varied (0-6.0%) according to island; the highest was detected on Oenarodo (6.0%), followed by Naenarodo (5.6%) and Nakwoldo (5.4%). The majority (35 persons, 94.6%) of Cryptosporidium-infected individuals were older than 50 years of age. Men (22/1,159; 1.9%) were infected at a higher rate than women (16/1,382; 1.2%). The results of the present survey indicate that human Cryptosporidium infections (due to Cryptosporidium hominis and/or C. parvum) are maintained at a relatively low prevalence on coastal islands of Jeollanam-do, Republic of Korea. [ABSTRACT FROM AUTHOR]
- Published
- 2006
- Full Text
- View/download PDF
20. Remote Sensing / Assessing the link between human modification and changes in Land Surface Temperature in Hainan, China using image archives from Google earth engine
- Author
-
Chu, Lixia, Oloo, Francis, Bergstedt, Helena, and Blaschke, Thomas
- Subjects
human modification ,land surface temperature ,coastal islands ,temperature zones - Abstract
In many areas of the world, population growth and land development have increased demand for land and other natural resources. Coastal areas are particularly susceptible since they are conducive for marine transportation, energy production, aquaculture, marine tourism and other activities. Anthropogenic activities in the coastal areas have triggered unprecedented land use change, depletion of coastal wetlands, loss of biodiversity, and degradation of other vital ecosystem services. The changes can be particularly drastic for small coastal islands with rich biodiversity. In this study, the influence of human modification on land surface temperature (LST) for the coastal island Hainan in Southern China was investigated. We hypothesize that for this island, footprints of human activities are linked to the variation of land surface temperature, which could indicate environmental degradation. To test this hypothesis, we estimated LST changes between 2000 and 2016 and computed the spatio-temporal correlation between LST and human modification. Specifically, we classified temperature data for the four years 2000, 2006, 2012 and 2016 into 5 temperature zones based on their respective mean and standard deviation values. We then assessed the correlation between each temperature zone and a human modification index computed for the year 2016. Apart from this, we estimated mean, maximum and the standard deviation of annual temperature for each pixel in the 17 years to assess the links with human modification. The results showed that: (1) The mean LST temperature in Hainan Island increased with fluctuations from 2000 to 2016. (2) The moderate temperature zones were dominant in the island during the four years included in this study. (3) A strong positive correlation of 0.72 between human modification index and mean and maximum LST temperature indicated a potential link between human modification and mean and maximum LST temperatures over the 17 years of analysis. (4) The mean value of human modification index in the temperature zones in 2016 showed a progressive rise with 0.24 in the low temperature zone, 0.33 in the secondary moderate, 0.45 in the moderate, 0.54 in the secondary high and 0.61 in the high temperature zones. This work highlighted the potential value of using large and multi-temporal earth observation datasets from cloud platforms to assess the influence of human activities in sensitive ecosystems. The results could contribute to the development of sustainable management and coastal ecosystems conservation plans. (VLID)4869414
- Published
- 2020
- Full Text
- View/download PDF
21. The vascular flora and vegetation of Queimada Grande Island, São Paulo State, southeastern Brazil
- Author
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Kurtz, Bruno Coutinho, Souza, Vinicius Castro, Magalhães, Adriana Melo, Paula-Souza, Juliana de, Duarte, Alexandre Romariz, and Joaquim-Jr, Gilberto Oliveira
- Subjects
síndromes de dispersão ,Atlantic Forest ,Floresta Atlântica ,áreas protegidas ,conservação da biodiversidade ,biodiversity conservation ,coastal islands ,protected areas ,ilhas costeiras ,espécies invasoras ,dispersal syndromes ,invasive species - Abstract
Studies of the vegetation on islands off the coast of southeastern Brazil are still very scarce, despite their importance for assessing, managing, and conserving insular biodiversity. We present here a list of the vascular flora of Queimada Grande Island (QGI; 24°29′10″ S, 46°40′30″ W, 57 ha, 33.2 km from the coast) in southeastern Brazil and describe its phytophysiognomies. The island is covered mainly by Atlantic Forest (Dense Ombrophilous Forest), as well as with rock outcrop and anthropogenic vegetation with herbaceous-shrub phytophysiognomies. QGI showed relatively low species richness (S = 125) when compared to other Brazilian coastal islands. Herbaceous (52) and climbing species (31) predominated on QGI. The richest families were Fabaceae (11 species), Poaceae (9), and Apocynaceae, Asteraceae and Orchidaceae (8 species each). Most species (S = 112) are autochthonous from different phytophysiognomies of the southeastern Brazilian Atlantic Forest complex. Many species associated with anthropically disturbed areas (S = 26) can be found on QGI, including the invasive grass Melinis minutiflora. There was a slight predominance of zoochory (S = 50). We did not identify any species endemic to QGI. One of its species (Cattleya intermedia, Orchidaceae) is vulnerable at both national and regional levels, and another (Barrosoa apiculata, Asteraceae) is presumably extinct on the mainland in São Paulo State. The vascular flora of QGI originated from the mainland Atlantic Forest complex, following the pattern of other coastal islands in southeastern Brazil. The flora and vegetation of QGI reflect the combination of insular conditions, the small size of the island, habitat restriction, steep topography, incipient soils, and the past use of the area with the introduction of several foreign species. We recommend permanent monitoring of the vegetation cover of QGI and its management, in order to ensure the conservation of the local native biota. Resumo Estudos sobre a vegetação de ilhas costeiras no sudeste do Brasil ainda são muito escassos, apesar de sua importância para a avaliação, manejo e conservação da biodiversidade insular. Nós apresentamos aqui uma lista da flora vascular da Ilha Queimada Grande (IQG; 24°29′10″ S, 46°40′30″ W, 57 ha, 33,2 km da costa), sudeste do Brasil, e descrevemos suas fitofisionomias. A ilha é recoberta principalmente por Floresta Atlântica (Floresta Ombrófila Densa), bem como por vegetação sobre afloramento rochoso e vegetação antrópica com fisionomias herbáceo-arbustivas. A IQG apresentou riqueza relativamente baixa (S = 125) comparada a de outras ilhas costeiras do Brasil. Espécies herbáceas (52) e trepadeiras (31) predominaram na IQG. As famílias mais ricas foram Fabaceae (11 espécies), Poaceae (9), Apocynaceae, Asteraceae e Orchidaceae (8 espécies cada). A maioria das espécies (S = 112) é autóctone de diferentes fitofisionomias do complexo da Floresta Atlântica do sudeste do Brasil. Muitas espécies associadas a áreas antropicamente alteradas (S = 26) são encontradas na IQG, incluindo a gramínea invasora Melinis minutiflora. Houve ligeira predominância de zoocoria (S = 50). Nós não identificamos espécies endêmicas para a IQG. Uma espécie (Cattleya intermedia, Orchidaceae) encontra-se vulnerável em nível nacional e estadual, e outra (Barrosoa apiculata, Asteraceae) está presumivelmente extinta no estado de São Paulo. A flora vascular da IQG originou-se no complexo da Floresta Atlântica continental, seguindo o padrão de outras ilhas costeiras do sudeste do Brasil. A flora e a vegetação da IQG refletem a combinação da condição insular, tamanho reduzido da ilha, restrição de habitat, topografia acidentada, solos incipientes e o uso pretérito da área com a introdução de várias espécies alóctones. Nós recomendamos o monitoramento permanente da vegetação da IQG e seu manejo, visando garantir a conservação da biota nativa local.
- Published
- 2017
22. Assessing the Link between Human Modification and Changes in Land Surface Temperature in Hainan, China Using Image Archives from Google Earth Engine.
- Author
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Chu, Lixia, Oloo, Francis, Bergstedt, Helena, and Blaschke, Thomas
- Subjects
- *
LAND surface temperature , *MARITIME shipping , *COASTAL wetlands , *ECOSYSTEM management , *INTEGRATED coastal zone management , *LOW temperatures , *COASTAL zone management - Abstract
In many areas of the world, population growth and land development have increased demand for land and other natural resources. Coastal areas are particularly susceptible since they are conducive for marine transportation, energy production, aquaculture, marine tourism and other activities. Anthropogenic activities in the coastal areas have triggered unprecedented land use change, depletion of coastal wetlands, loss of biodiversity, and degradation of other vital ecosystem services. The changes can be particularly drastic for small coastal islands with rich biodiversity. In this study, the influence of human modification on land surface temperature (LST) for the coastal island Hainan in Southern China was investigated. We hypothesize that for this island, footprints of human activities are linked to the variation of land surface temperature, which could indicate environmental degradation. To test this hypothesis, we estimated LST changes between 2000 and 2016 and computed the spatio-temporal correlation between LST and human modification. Specifically, we classified temperature data for the four years 2000, 2006, 2012 and 2016 into 5 temperature zones based on their respective mean and standard deviation values. We then assessed the correlation between each temperature zone and a human modification index computed for the year 2016. Apart from this, we estimated mean, maximum and the standard deviation of annual temperature for each pixel in the 17 years to assess the links with human modification. The results showed that: (1) The mean LST temperature in Hainan Island increased with fluctuations from 2000 to 2016. (2) The moderate temperature zones were dominant in the island during the four years included in this study. (3) A strong positive correlation of 0.72 between human modification index and mean and maximum LST temperature indicated a potential link between human modification and mean and maximum LST temperatures over the 17 years of analysis. (4) The mean value of human modification index in the temperature zones in 2016 showed a progressive rise with 0.24 in the low temperature zone, 0.33 in the secondary moderate, 0.45 in the moderate, 0.54 in the secondary high and 0.61 in the high temperature zones. This work highlighted the potential value of using large and multi-temporal earth observation datasets from cloud platforms to assess the influence of human activities in sensitive ecosystems. The results could contribute to the development of sustainable management and coastal ecosystems conservation plans. [ABSTRACT FROM AUTHOR]
- Published
- 2020
- Full Text
- View/download PDF
23. The vascular flora and vegetation of Queimada Grande Island, São Paulo State, southeastern Brazil
- Author
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Kurtz,Bruno Coutinho, Souza,Vinicius Castro, Magalhães,Adriana Melo, Paula-Souza,Juliana de, Duarte,Alexandre Romariz, and Joaquim-Jr,Gilberto Oliveira
- Subjects
Atlantic Forest ,biodiversity conservation ,coastal islands ,protected areas ,dispersal syndromes ,invasive species - Abstract
Studies of the vegetation on islands off the coast of southeastern Brazil are still very scarce, despite their importance for assessing, managing, and conserving insular biodiversity. We present here a list of the vascular flora of Queimada Grande Island (QGI; 24°29′10″ S, 46°40′30″ W, 57 ha, 33.2 km from the coast) in southeastern Brazil and describe its phytophysiognomies. The island is covered mainly by Atlantic Forest (Dense Ombrophilous Forest), as well as with rock outcrop and anthropogenic vegetation with herbaceous-shrub phytophysiognomies. QGI showed relatively low species richness (S = 125) when compared to other Brazilian coastal islands. Herbaceous (52) and climbing species (31) predominated on QGI. The richest families were Fabaceae (11 species), Poaceae (9), and Apocynaceae, Asteraceae and Orchidaceae (8 species each). Most species (S = 112) are autochthonous from different phytophysiognomies of the southeastern Brazilian Atlantic Forest complex. Many species associated with anthropically disturbed areas (S = 26) can be found on QGI, including the invasive grass Melinis minutiflora. There was a slight predominance of zoochory (S = 50). We did not identify any species endemic to QGI. One of its species (Cattleya intermedia, Orchidaceae) is vulnerable at both national and regional levels, and another (Barrosoa apiculata, Asteraceae) is presumably extinct on the mainland in São Paulo State. The vascular flora of QGI originated from the mainland Atlantic Forest complex, following the pattern of other coastal islands in southeastern Brazil. The flora and vegetation of QGI reflect the combination of insular conditions, the small size of the island, habitat restriction, steep topography, incipient soils, and the past use of the area with the introduction of several foreign species. We recommend permanent monitoring of the vegetation cover of QGI and its management, in order to ensure the conservation of the local native biota.
- Published
- 2017
24. Novos registros e ampliação de limites meridionais de distribuição de poríferos (Porifera, Demospongiae) no Atlântico sudoeste New records and southern boundaries enlargement of sponge distribution (Porifera, Demospongiae) from southwestern Atlantic
- Author
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Cléa Lerner, Beatriz Mothes, and João L. Carraro
- Subjects
mergulho autônomo ,endemism ,lcsh:Zoology ,ilhas litorâneas ,scuba diving ,endemismo ,Coastal islands ,lcsh:Q ,Costão rochoso ,lcsh:QL1-991 ,distribuição de esponjas ,lcsh:Science ,rocky coast - Abstract
Ampliam-se os limites meridionais de sete espécies de poríferos para costa brasileira. Duas espécies representam novos registros: Chalinula zeae de Weerdt, 2000 e Terpios manglaris Rützler & Smith, 1993 e cinco são novas ocorrências para o estado de Santa Catarina: Callyspongia (Toxochalina) pseudotoxa Muricy & Ribeiro, 1999; Mycale (Carmia) magnirhaphidifera van Soest, 1984; Hymeniacidon heliophila Parker, 1910; Monanchora arbuscula (Duchassaing & Michelotti, 1864) e Scopalina ruetzleri (Wiedenmayer, 1977). Apresenta-se também a descrição taxonômica das espécies em questão e as três últimas são descritas pela primeira vez para a costa brasileira, uma vez que foram apenas citadas por outros autores.The southern boundaries of seven species of Brazilian coast sponges were enlarged. Two of them represent new records: Chalinula zeae de Weerdt, 2000 e Terpios manglaris Rützler & Smith, 1993 and five were registered for the first time from the state of Santa Catarina: Callyspongia (Toxochalina) pseudotoxa Muricy & Ribeiro, 1999; Mycale (Carmia) magnirhaphidifera van Soest, 1984; Hymeniacidon heliophila Parker, 1910; Monanchora arbuscula (Duchassaing & Michelotti, 1864) and Scopalina ruetzleri (Wiedenmayer, 1977). The taxonomic description of species is also provided and the three latter were described for the first time from the Brazilian coast, since other authors only cited it.
- Published
- 2005
25. Serpentes das ilhas costeiras do Estado de São Paulo, Sudeste do Brasil
- Author
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Marco Aurélio de Sena, Denise Maria Peccinini-Seale, Paulo José Pyles Cicchi, Marcelo Ribeiro Duarte, Universidade Estadual Paulista (Unesp), Universidade de São Paulo (USP), and Instituto Butantan
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Bothrops jararaca ,biology ,Micrurus corallinus ,Ecology ,Helicops carinicaudus ,Spilotes pullatus ,ilhas ,conservation ,Jararacussu ,biology.organism_classification ,snakes ,diversidade ,diversity ,inventory ,serpentes ,Geography ,Common species ,Boidae ,Colubridae ,inventário ,coastal islands ,conservação - Abstract
Submitted by Guilherme Lemeszenski (guilherme@nead.unesp.br) on 2013-08-22T18:42:46Z No. of bitstreams: 1 S1676-06032007000200026.pdf: 926289 bytes, checksum: 3625c46449d49efd1e5e034bb2420dfb (MD5) Made available in DSpace on 2013-08-22T18:42:46Z (GMT). No. of bitstreams: 1 S1676-06032007000200026.pdf: 926289 bytes, checksum: 3625c46449d49efd1e5e034bb2420dfb (MD5) Previous issue date: 2007-01-01 Made available in DSpace on 2013-09-30T19:30:20Z (GMT). No. of bitstreams: 2 S1676-06032007000200026.pdf: 926289 bytes, checksum: 3625c46449d49efd1e5e034bb2420dfb (MD5) S1676-06032007000200026.pdf.txt: 54465 bytes, checksum: 68eb96de96d0bf31eab502fd44b4e548 (MD5) Previous issue date: 2007-01-01 Submitted by Vitor Silverio Rodrigues (vitorsrodrigues@reitoria.unesp.br) on 2014-05-20T15:08:19Z No. of bitstreams: 2 S1676-06032007000200026.pdf: 926289 bytes, checksum: 3625c46449d49efd1e5e034bb2420dfb (MD5) S1676-06032007000200026.pdf.txt: 54465 bytes, checksum: 68eb96de96d0bf31eab502fd44b4e548 (MD5) Made available in DSpace on 2014-05-20T15:08:20Z (GMT). No. of bitstreams: 2 S1676-06032007000200026.pdf: 926289 bytes, checksum: 3625c46449d49efd1e5e034bb2420dfb (MD5) S1676-06032007000200026.pdf.txt: 54465 bytes, checksum: 68eb96de96d0bf31eab502fd44b4e548 (MD5) Previous issue date: 2007-01-01 Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP) Há poucos estudos sobre a fauna de serpentes em ilhas costeiras do Estado de São Paulo, Sudeste do Brasil e um baixo número de espécies depositadas em coleções zoológicas. No Brasil, pela primeira vez, foi realizado um inventário em 18 ilhas do litoral paulista a partir de pesquisa de registros nas coleções herpetológicas do Sudeste do Brasil. Também foram realizadas coletas de campo em onze ilhas. Trinta e seis espécies de quatro famílias foram registradas: uma espécie de Boidae, trinta de Colubridae, uma de Elapidae e quatro de Viperidae. Os dados de campo apresentaram treze ocorrências novas de espécies sem registro nas coleções. Para estimar a raridade das espécies utilizaram-se categorias de abundância relativa: comum, não-freqüente e rara. Das espécies amostradas, 44,4% foram consideradas raras. As espécies mais comuns foram Micrurus corallinus, presente em doze ilhas; Bothrops jararaca e Liophis miliaris, presentes em onze ilhas, B. jararacussu e Chironius bicarinatus, presentes em 10 ilhas. Foram efetuados sete novos registros para a Ilha do Cardoso (25° 05 S e 47° 59 W): C. bicarinatus, C. multiventris, Dipsas petersi, Echinanthera bilineata, E. cephalostriata, Helicops carinicaudus e Xenodon neuwiedii; três para Ilha Comprida (24° 54 S e 47° 48 W): B. jararacussu, C. bicarinatus e H. carinicaudus; um para Ilha Anchieta (23° 32 S e 45° 03 W): Spilotes pullatus; um para a Ilha das Couves (23° 25 S e 44° 52 W): L. miliaris; um para a Ilha dos Porcos (23° 23 S e 44° 54 W): B. jararaca. B. alcatraz e B. insularis, endêmicos à Ilha de Alcatrazes e à Ilha da Queimada Grande, respectivamente, são considerados criticamente em perigo segundo IUCN. Foi registrada a extinção da fauna de serpentes na Ilha Monte de Trigo. Os ecossistemas insulares, mais vulneráveis que os continentais, carecem de uma proteção mais efetiva. A maioria destas espécies (cerca de 52%) preda anfíbios, reforçando a necessidade de conservação das florestas. There are relatively few studies on snake fauna from coastal islands of the State of São Paulo (SSP), Southeastern Brazil and the number of species housed in Brazilian institutional zoological collections is relatively limited. In Brazil, for the first time, a snake inventory for eighteen islands of coastal SSP is presented. Here we record data from sampling on eleven islands as well information on vouchered species in the main herpetological collections. Thirty-six species from four families: one Boidae, thirty Colubridae, one Elapidae and four Viperidae from eighteen islands are listed as well as the thirteen new island records for snakes. Relative abundance categories were used for species rarity: common, infrequent and rare; 44.4% of the snakes with voucher specimens were considered rare. The most common species in twelve of the eighteen islands was Micrurus corallinus; in eleven of the eighteen islands were Bothrops jararaca and Liophis miliaris; in ten of the eighteen islands were B. jararacussu and Chironius bicarinatus. The most common snake species on coastal islands were Micrurus corallinus which was found in twelve of the eighteen islands, followed by Bothrops jararaca and Liophis miliaris found on eleven of the eighteen islands and B. jararacussu and Chironius bicarinatus which were found in ten of the eighteen islands studied. There are seven new records of snake species for Cardoso Island (25° 05 S and 047° 59 W): C. bicarinatus, C. multiventris, Dipsas petersi, Echinanthera bilineata, E. cephalostriata, Helicops carinicaudus and Xenodon neuwiedii; three new records for Comprida Island (24° 54 S and 47° 48 W): B. jararacussu, C. bicarinatus and H. carinicaudus; one for Anchieta Island (23° 32 S and 045° 03 W): Spilotes pullatus; one for Couves Island (23° 25 S and 44° 52 W): L. miliaris; one for Porcos Island (23° 23 S and 44° 54 W), B. jararaca. The endemic species B. alcatraz from Alcatrazes Island and B. insularis from Queimada Grande Island are considered endangered species by IUCN. Snake fauna on Monte de Trigo Island are extinct. The fragility of insular snake fauna needs more attention for environmental conservation, since 52.0% of snake species preys on amphibians, highlighting the importance of forest conservation. Universidade Estadual Paulista Instituto de Biociências Departamento de Zoologia IBUSP Departamento de Genética e Biologia Evolutiva Instituto Butantan Laboratório de Herpetologia Universidade Estadual Paulista Instituto de Biociências Departamento de Zoologia
- Published
- 2007
26. Cianobactérias marinhas bentônicas de ilhas costeiras do Estado de São Paulo, Brasil
- Author
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Lilian Mos Blois Crispino and Célia Leite Sant'Anna
- Subjects
Cyanobacteria ,Nostocales ,Shore ,geography ,geography.geographical_feature_category ,biology ,Ecology ,taxonomia ,Cyanobacteria bentônica ,benthic Cyanobacteria ,biology.organism_classification ,ilhas costeiras ,São Paulo ,taxonomy ,Habitat ,Benthic zone ,coastal islands ,Oscillatoriales ,Species richness ,Chroococcales - Abstract
O grupo das cianobactérias marinhas bentônicas vem sendo freqüentemente excluído dos levantamentos taxonômicos da costa brasileira, com exceção de alguns trabalhos para o litoral paulista. Para o ambiente de ilhas, apenas é conhecido um trabalho para a Ilha do Cardoso. Assim, o objetivo deste estudo consiste em ampliar o conhecimento da riqueza das cianobactérias marinhas bentônicas de ilhas do litoral paulista. Os resultados obtidos mostram a ocorrência de 24 espécies de cianobactérias em ilhas do litoral paulista. A ordem Oscillatoriales foi representada por 12 espécies (50%), Nostocales por 6 espécies (25%) e Chrooccoccales por seis espécies (25%). Entre as espécies identificadas, quatro são novas ocorrências para o litoral Atlântico sul: Cyanodermatium gonzaliensis H. Leon-Tejera et al., Xenococcus pallidus (Hansg.) Komárek & Anagn., Microchaete aeruginea Batters and Hydrocoryne spongiosa Bornet & Flahault e uma nova referência para o litoral brasileiro: Rivularia atra Roth. Atualizações nomenclaturais foram adotadas de acordo com o sistema de classificação mais atual de Komarek & Agnostidis. Marine benthic Cyanobacteria have always been neglected by taxonomic surveys of the Brazilian coast, exception made for some works focusing the shore of the São Paulo State. For island habitats there is only one study carried out for the Cardoso Island. Therefore, the aim of this study is to improve the knowledge about the richness of cyanobacterial species in marine benthic communities from coastal islands of the São Paulo State. The results show the occurrence of 24 species of Cyanobacteria: Oscillatoriales are represented by 12 species (50%), Nostocales by 6 species (25%) and Chroococcales by 6 species (25%). Among the identified species, four represent new references for the South Atlantic: Cyanodermatium gonzaliensis H. Leon-Tejera et al., Xenococcus pallidus (Hansg.) Komárek & Anagn., Microchaete aeruginea Batters and Hydrocoryne spongiosa Bornet & Flahault, and one is a new occurrence for the coast of Brazil: Rivularia atra Roth. Some nomenclatural updatings were adopted according to the Komárek & Agnostidis more recent system of classification.
- Published
- 2006
27. New records and southern boundaries enlargement of sponge distribution (Porifera, Demospongiae) from southwestern Atlantic
- Author
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João Luís Carraro, Beatriz Mothes, and Cléa Lerner
- Subjects
Monanchora arbuscula ,mergulho autônomo ,Terpios manglaris ,Scopalina ruetzleri ,scuba diving ,Zoology ,Coastal islands ,endemismo ,Costão rochoso ,Biology ,distribuição de esponjas ,biology.organism_classification ,rocky coast ,Callyspongia ,endemism ,Hymeniacidon heliophila ,ilhas litorâneas ,Animal Science and Zoology - Abstract
Ampliam-se os limites meridionais de sete espécies de poríferos para costa brasileira. Duas espécies representam novos registros: Chalinula zeae de Weerdt, 2000 e Terpios manglaris Rützler & Smith, 1993 e cinco são novas ocorrências para o estado de Santa Catarina: Callyspongia (Toxochalina) pseudotoxa Muricy & Ribeiro, 1999; Mycale (Carmia) magnirhaphidifera van Soest, 1984; Hymeniacidon heliophila Parker, 1910; Monanchora arbuscula (Duchassaing & Michelotti, 1864) e Scopalina ruetzleri (Wiedenmayer, 1977). Apresenta-se também a descrição taxonômica das espécies em questão e as três últimas são descritas pela primeira vez para a costa brasileira, uma vez que foram apenas citadas por outros autores. The southern boundaries of seven species of Brazilian coast sponges were enlarged. Two of them represent new records: Chalinula zeae de Weerdt, 2000 e Terpios manglaris Rützler & Smith, 1993 and five were registered for the first time from the state of Santa Catarina: Callyspongia (Toxochalina) pseudotoxa Muricy & Ribeiro, 1999; Mycale (Carmia) magnirhaphidifera van Soest, 1984; Hymeniacidon heliophila Parker, 1910; Monanchora arbuscula (Duchassaing & Michelotti, 1864) and Scopalina ruetzleri (Wiedenmayer, 1977). The taxonomic description of species is also provided and the three latter were described for the first time from the Brazilian coast, since other authors only cited it.
- Published
- 2005
28. Un estudio sobre las actividades turísticas en seis Islas brasileñas
- Author
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Lucas Fruet Gil, Felipe Decol, Rita Gabriela Araujo Carvalho, and Rosane Maria Lanzer
- Subjects
Coastal Islands ,Brasil ,Islas costeras ,Turismo ,General Medicine ,Destinations ,Tourism ,Geography ,Ilhas Costeiras ,Natural processes ,Ecotourism ,Environmental impact assessment ,Environmental planning ,Environmental degradation ,Brazil ,High potential - Abstract
Resumo As ilhas ou estados insulares possuem características físicas que as tornam atraentes para a visitação, sendo suas especificidades propícias para a prática de diversas modalidades turísticas, principalmente aquelas que utilizam os atrativos naturais. Os ambientes insulares são considerados frágeis e podem sofrer facilmente a degradação de seus ecossistemas. As circunstâncias que levam à essa degradação podem ser causadas por ações humanas ou oriundas de processos naturais. Nesse sentido, o presente estudo objetivou identificar as atividades que vêm sendo comercializadas em seis ilhas brasileiras. Para realização da pesquisa foram coletadas informações dos sites dos destinos, a partir das quais foi construído um questionário. Este foi enviado online para 30 agências receptivas das ilhas, visando obter informações acerca das atividades relacionadas ao turismo desenvolvido nas ilhas. Os resultados do estudo demonstram que algumas das atividades citadas pelos entrevistados como frequentes possuem alto potencial de impacto ambiental negativo e requerem melhor planejamento ou até mesmo sua proibição, pois não são compatíveis à fragilidade do ambiente insular. Abstract Abstract: The islands or island states have physical characteristics that make them attractive to the visitation, its specificities are conducive to the practice of various tourist modalities, especially those using the natural attractions. The island environments are considered fragile and can easily suffer the degradation of their ecosystems. The causes of this degradation can be caused by humans or from natural processes. In this sense, the present study aimed to identify the activities that are being sold in six Brazilian tourist islands. To conduct the research, information was collected from sites of destinations, then was developed an on-line questionnaire and sent to 30 incoming agencies of the six islands in order to obtain an overview. The results obtained in this paper concluded that some of the activities cited by respondents as frequent, have high potential for negative environmental impact and require more planning or even its prohibition, by not be consistent with the fragility of the island environment. Resumen Las islas y los Estados insulares tienen características físicas que se hacen atractivos para los visitantes, sus especificidades son propicias para la práctica de diversas modalidades de turismo, especialmente los que usan los atractivos naturales. Las islas son ambientes consideradas frágiles y pueden fácilmente sufrir la degradación de sus ecosistemas. Las causas de la degradación pueden originarse por los seres humanos o derivar de los procesos naturales. En este sentido, el presente estudio tuvo como objetivo identificar las actividades que se están vendiendo en seis islas turísticas de Brasil. Para realizar el estudio, se recogió información de los sitios de los destinos, en seguida, se construyó un cuestionario y se envió a 30 agencias receptivas de las seis islas, con el fin de obtener una visión general. Con los resultados obtenidos, llegase a la conclusión de que algunas de las actividades mencionadas por los encuestados como frecuentes, tienen alto potencial de impacto ambiental negativo y requieren más planificación o incluso su prohibición, ya que no son compatibles con el medio ambiente frágil de las islas.
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