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- W1959532238 abstract "The agricultural matrix surrounding forested areas serves critical functions as dispersal corridors and alternate habitat for wildlife. Agricultural intensification, however, can reduce the conservation value of these areas. To evaluate the effects of agroecosystem management on bat assemblages, we studied the abundance and diversity of leaf-nosed bats (family: Phyllostomidae) in southwestern Chiapas, Mexico, a landscape dominated by shade coffee agroforestry. During 2104 mist-net hour (MNH), we captured 3167 bats of 27 phyllostomid species. Total species richness in each land-use type varied from 24 species in forest fragments to 22 species in commercial shade polycultures. Although the cumulative observed species richness showed little change in response to management intensity, the number of bats captured per MNH declined significantly in the more intensively managed (i.e., low-shade monocultures) plantations. Intensively managed coffee plantations had lower phyllostomid diversity and species similarity, and had lower proportions of nectarivorous and animalivorous bats. Among frugivores, the proportion of large (>25 g) frugivores captured increased with management intensity. Recapture frequency was significantly higher than expected in forest fragments, and lower than expected in more intensively managed coffee. Our results suggest that less intensively managed coffee agroforests can serve as valuable feeding and commuting areas for most leaf-nosed bats, and that maintaining forest fragments in agricultural landscapes contributes to bat diversity. Declines in populations of gleaning insectivores, however, could compromise natural suppression of insect pests in these agricultural areas. La matriz agrícola que rodea áreas protegidas y fragmentos de bosque tiene un papel crítico como corredores para la dispersión y hábitat alternativo para la vida silvestre. Sin embargo, la intensificación de la agricultura puede reducir el valor de estas áreas para la conservación. Para evaluar los efectos del manejo agrícola en la comunidad de murciélagos, estudiamos la abundancia y diversidad de murciélagos con hoja nasal (Phyllostomidae) en el suroeste de Chiapas, México, un paisaje dominado por el cultivo de café. Tras 2104 horas-red, capturamos 3167 murciélagos en la familia Phyllostomidae, representando 27 especies. La riqueza total de especies en cada tipo de uso de suelo varió entre 24 especies en fragmentos de bosque tropical a 22 especies en monocultivos comerciales de café. Mientras la riqueza cumulativa mostró pocos cambios tras el gradiente de intensificación, la cantidad de murciélagos capturado por noche disminuyó significativamente en los cafetales de alto manejo (monocultivos de sombra). Cafetales bajo manejo intensivo mostraron menos diversidad y similitud entre especies, y proporciones bajas de murciélagos nectarívoros e insectívoros. Entre los frugívoros, la proporción de murciélagos grandes (> 25 g) aumentó con manejo más intensivo. La frecuencia de recapturas fue mayor que la esperada en fragmentos de bosque, y menor en cafetales bajo manejo intensivo. Nuestros resultados sugieren que los cafetales con sombra diversa pueden servir como áreas valiosas para la mayoría de los murciélagos en la familia Phyllostomidae, y que la persistencia de fragmentos pequeños de bosque en los agropaisajes contribuye a la diversidad de murciélagos en hábitat antropogénico. Sin embargo, la disminución de poblaciones de insectívoros de follaje puede poner en peligro el control natural de plagas en estos agroecosistemas. TABLE S1. Results of factorial ANCOVA for the effects environmental and landscape variables, season, management intensity, and their interactions on the species richness and abundance of bats in forest fragments and coffee plantations. TABLE S2. Results of factorial ANCOVA for the effects season, management intensity, and their interactions on the species richness and abundance of bats in forest fragments and coffee plantations. TABLE S3. Average number of phyllostomid bat captures per 100 MNH in forest fragments, low-management coffee, medium-management coffee, and high-management coffee in southern Chiapas, Mexico. FIGURE S1. Study area in Soconusco region, Chiapas, Mexico, showing coffee plantations and forest fragments where surveys were conducted and locations where bats were captured. Please note: Wiley-Blackwell is not responsible for the content or functionality of any supporting materials supplied by the authors. Any queries (other than missing material) should be directed to the corresponding author for the article. Please note: The publisher is not responsible for the content or functionality of any supporting information supplied by the authors. Any queries (other than missing content) should be directed to the corresponding author for the article." @default.
- W1959532238 created "2016-06-24" @default.
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- W1959532238 date "2010-02-26" @default.
- W1959532238 modified "2023-09-25" @default.
- W1959532238 title "Effects of Agricultural Intensification on the Assemblage of Leaf-Nosed Bats (Phyllostomidae) in a Coffee Landscape in Chiapas, Mexico" @default.
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- W1959532238 doi "https://doi.org/10.1111/j.1744-7429.2010.00626.x" @default.
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