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2 results on '"Malpica A"'

1. Revealing genetic patterns across ecoregions in the northeastern Pacific of California and Baja California.

Author

Ferrera‐Rodríguez, Mariana Ronalda, Malpica‐Cruz, Luis, Munguía‐Vega, Adrián, Beas‐Luna, Rodrigo, Flores‐Morales, Ana Laura, and Abadía‐Cardoso, Alicia

Subjects
*LIFE history theory, *LITERATURE reviews, *GENE flow, *POPULATION genetics, *BIOGEOGRAPHY
Abstract

Aim: We reconstructed the genetic patterns and identified the main genetic breaks of several taxa across California and Baja California coast. Additionally, we evaluated the contribution of different variables to the level of structure. Location: California and Baja California coast. Taxon: Fish, invertebrates, algae, seagrass and mammals. Methods: We generated a map to reconstruct the genetic patterns using genetic information (Fst index and phylogenetic clades distribution) from a literature review of population genetics publications from 2000 to 2023. For the analysis of genetic connectivity drivers, we explored the effect of different variables representing life history traits, reproductive strategies and biogeographic variables and generated five working hypotheses which were evaluated with generalized linear models (GLMs). Results: We identified 42 genetic breaks from 63 species across our study area. The largest number of breaks occurs from 27° N to 29° N and from 31° N to 35° N. This range includes transition zones between ecoregions such as Punta Eugenia, Baja California, Mexico and Point Conception, California, USA. We also identified Ensenada, Baja California region as a barrier to gene flow. From a transboundary perspective, we found 40 species with connectivity between California and Baja California, including 14 commercial and or recreational species. We found none of the variables explored had a clear effect on the level of genetic differentiation of the species assessed in the region. Main Conclusion: Genetic breaks among different taxa do not distribute randomly across the latitudinal range from California and Baja California coastal area, rather they are mainly located in transition zones between marine ecoregions. The challenge to identify specific variables that explain general genetic patterns highlights the complexity that drives population connectivity processes in marine species. [ABSTRACT FROM AUTHOR]

Published
2024
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2. Social Capital Within Ethnic Communities: The Case Of Indigenous Mexicans in Los Angeles.

Author

Malpica, Daniel Melero

Subjects
SOCIAL capital, ETHNIC groups, ETHNOLOGY, SOCIOLOGY
Abstract

SOCIAL CAPITAL WITHIN ETHNIC COMMUNITIES:THE CASE OF INDIGENOUS MEXICANS IN LOS ANGELESDaniel Melero MalpicaSonoma State UniversityABSTRACTIndigenous Mexicans form the largest share of the new Mexican migrants arriving to the United States. Better job opportunities and more attractive wages coupled with severe unemployment and exploitative conditions at home have encouraged indigenous people to migrate in search of employment to the United States. As a result, indigenous Mexicans have come to el norte in record numbers and have reshaped Mexican communities in the United States. In this study, I explore how social capital and its networks facilitate the social and economic incorporation of indigenous Mexican migrants into the United States. In particular, I examine what kind of work indigenous Mexicans do, how they find work, and how they struggle to work in the new low-wage economy, raise families, and move ahead. Based on ethnographic fieldwork and in-depth interviews with Zapotec indigenous migrants from Oaxaca (Mexico) who are living in Los Angeles, the study seeks to shed light on the dynamic processes of family and ethnic networks in contemporary labor markets. The research highlights that indigenous Mexicans can count on social networks, family ties, and communities to mobilize resources more easily and effectively, including the ability to find work. Zapotec migrants rely on their networks and communities; in so doing, they strengthen these institutions and thereby accumulate social capital. This ethnographic analysis pays particular attention to how indigenous Mexicans generate social capital to obtain resources for survival and social mobility. [ABSTRACT FROM AUTHOR]

Published
2008

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