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Seasonal dietary niche changes in Neotropical bats

Published online by Cambridge University Press:  21 September 2023

Sebastião Maximiano Corrêa Genelhú*
Affiliation:
Centro de Biodiversidade e Recursos Genéticos, Universidade Federal de Lavras (UFLA), Caixa Postal 3037, 37200-000, Lavras, MG, Brazil Departamento de Ecologia e Conservação, Universidade Federal de Lavras (UFLA), Caixa Postal 3037 – 37200-000, Lavras, MG, Brazil
Rafael de Souza Laurindo
Affiliation:
Instituto Sul Mineiro de Estudos e Conservação da Natureza (ISMECN), Campo Belo, MG, Brazil
Arthur Setsuo Tahara
Affiliation:
Centro de Biodiversidade e Recursos Genéticos, Universidade Federal de Lavras (UFLA), Caixa Postal 3037, 37200-000, Lavras, MG, Brazil Departamento de Ecologia e Conservação, Universidade Federal de Lavras (UFLA), Caixa Postal 3037 – 37200-000, Lavras, MG, Brazil
Letícia Langsdorff Oliveira
Affiliation:
Centro de Biodiversidade e Recursos Genéticos, Universidade Federal de Lavras (UFLA), Caixa Postal 3037, 37200-000, Lavras, MG, Brazil
Renato Gregorin
Affiliation:
Centro de Biodiversidade e Recursos Genéticos, Universidade Federal de Lavras (UFLA), Caixa Postal 3037, 37200-000, Lavras, MG, Brazil Departamento de Biologia da Universidade Federal de Lavras (UFLA), Caixa Postal 3037 – 37200-000 – Lavras, MG, Brazil
*
Corresponding author: Sebastião Maximiano Corrêa Genelhú; Email: sebastiaogenelhum@gmail.com

Abstract

In the vast Neotropic seasonal environment, the most diverse family of bats, the Phyllostomidae (leaf-nosed bats), includes up to 93 species. As the quality and quantity of food resources fluctuate in the habitats, diet heterogeneity is observed among bat species and regions of the Neotropics. In this study, we investigated by faecal analyses, how the dietary niche (DN) of eight Phyllostomidae bat species (Artibeus planirostris, A. fimbriatus, Carollia brevicauda, C. perspicillata, Chiroderma villosum, Glossophaga soricina, Platyrrhinus lineatus, and Sturnira lilium) that occur in a karstic area in the Midwest region of Minas Gerais, Brazil, change in response to seasonal food availability. We recorded the consumption of insects and nine plant families. Moraceae was the most frequent, followed by Piperaceae. Given that seasonal dietary changes can be subtle and hardly noticeable along with fluctuating habitat conditions, we performed the DN decomposition of the eight bats species into subniches, by analysing the data with the WitOMI, which is a decomposition of the niche into temporal subniches. By improving the accuracy and details of the results, we assessed the effects of abiotic (precipitation and environmental temperature) and biotic (quantity and quality of food resources) interactions within the phyllostomid bat community. For each species, we compared niche breadth and overlap and found higher values for the dry season among morphologically similar species. The results of our study suggest that ecologically similar bat species coexist occupying different DNs.

Type
Research Article
Copyright
© The Author(s), 2023. Published by Cambridge University Press

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