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Dietary overlap and seasonality in three species of mormoopid bats from a tropical dry forest.
Mol Ecol 2015; 24(20):5296-307ME

Abstract

Competing hypotheses explaining species' use of resources have been advanced. Resource limitations in habitat and/or food are factors that affect assemblages of species. These limitations could drive the evolution of morphological and/or behavioural specialization, permitting the coexistence of closely related species through resource partitioning and niche differentiation. Alternatively, when resources are unlimited, fluctuations in resources availability will cause concomitant shifts in resource use regardless of species identity. Here, we used next-generation sequencing to test these hypotheses and characterize the diversity, overlap and seasonal variation in the diet of three species of insectivorous bats of the genus Pteronotus. We identified 465 prey (MOTUs) in the guano of 192 individuals. Lepidoptera and Diptera represented the most consumed insect orders. Diet of bats exhibited a moderate level of overlap, with the highest value between Pteronotus parnellii and Pteronotus personatus in the wet season. We found higher dietary overlap between species during the same seasons than within any single species across seasons. This suggests that diets of the three species are driven more by prey availability than by any particular predator-specific characteristic. P. davyi and P. personatus increased their dietary breadth during the dry season, whereas P. parnellii diet was broader and had the highest effective number of prey species in all seasons. This supports the existence of dietary flexibility in generalist bats and dietary niche overlapping among groups of closely related species in highly seasonal ecosystems. Moreover, the abundance and availability of insect prey may drive the diet of insectivores.

Authors+Show Affiliations

Posgrado en Ciencias Biológicas, Instituto de Biología, Universidad Nacional Autónoma de México, México, D. f. 04510, México.Estación de Biología Chamela, Instituto de Biología, Universidad Nacional Autónoma de México, A.P. 21, San Patricio, Jalisco, 48980, México.Estación de Biología Chamela, Instituto de Biología, Universidad Nacional Autónoma de México, A.P. 21, San Patricio, Jalisco, 48980, México.Faculty of Science and Technology, University of the Basque Country UPV/EHU, Sarriena z/g, Leioa, E-48940, Spain.School of Biological and Chemical Sciences, Queen Mary University of London, Mile end Road, London, E1 4NS, UK.

Pub Type(s)

Journal Article
Research Support, Non-U.S. Gov't

Language

eng

PubMed ID

26369564

Citation

Salinas-Ramos, Valeria B., et al. "Dietary Overlap and Seasonality in Three Species of Mormoopid Bats From a Tropical Dry Forest." Molecular Ecology, vol. 24, no. 20, 2015, pp. 5296-307.
Salinas-Ramos VB, Herrera Montalvo LG, León-Regagnon V, et al. Dietary overlap and seasonality in three species of mormoopid bats from a tropical dry forest. Mol Ecol. 2015;24(20):5296-307.
Salinas-Ramos, V. B., Herrera Montalvo, L. G., León-Regagnon, V., Arrizabalaga-Escudero, A., & Clare, E. L. (2015). Dietary overlap and seasonality in three species of mormoopid bats from a tropical dry forest. Molecular Ecology, 24(20), pp. 5296-307. doi:10.1111/mec.13386.
Salinas-Ramos VB, et al. Dietary Overlap and Seasonality in Three Species of Mormoopid Bats From a Tropical Dry Forest. Mol Ecol. 2015;24(20):5296-307. PubMed PMID: 26369564.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Dietary overlap and seasonality in three species of mormoopid bats from a tropical dry forest. AU - Salinas-Ramos,Valeria B, AU - Herrera Montalvo,L Gerardo, AU - León-Regagnon,Virginia, AU - Arrizabalaga-Escudero,Aitor, AU - Clare,Elizabeth L, Y1 - 2015/10/14/ PY - 2015/05/31/received PY - 2015/08/27/revised PY - 2015/09/10/accepted PY - 2015/9/16/entrez PY - 2015/9/16/pubmed PY - 2016/2/5/medline KW - Pteronotus KW - bat KW - molecular diet analysis KW - species’ interactions SP - 5296 EP - 307 JF - Molecular ecology JO - Mol. Ecol. VL - 24 IS - 20 N2 - Competing hypotheses explaining species' use of resources have been advanced. Resource limitations in habitat and/or food are factors that affect assemblages of species. These limitations could drive the evolution of morphological and/or behavioural specialization, permitting the coexistence of closely related species through resource partitioning and niche differentiation. Alternatively, when resources are unlimited, fluctuations in resources availability will cause concomitant shifts in resource use regardless of species identity. Here, we used next-generation sequencing to test these hypotheses and characterize the diversity, overlap and seasonal variation in the diet of three species of insectivorous bats of the genus Pteronotus. We identified 465 prey (MOTUs) in the guano of 192 individuals. Lepidoptera and Diptera represented the most consumed insect orders. Diet of bats exhibited a moderate level of overlap, with the highest value between Pteronotus parnellii and Pteronotus personatus in the wet season. We found higher dietary overlap between species during the same seasons than within any single species across seasons. This suggests that diets of the three species are driven more by prey availability than by any particular predator-specific characteristic. P. davyi and P. personatus increased their dietary breadth during the dry season, whereas P. parnellii diet was broader and had the highest effective number of prey species in all seasons. This supports the existence of dietary flexibility in generalist bats and dietary niche overlapping among groups of closely related species in highly seasonal ecosystems. Moreover, the abundance and availability of insect prey may drive the diet of insectivores. SN - 1365-294X UR - https://www.unboundmedicine.com/medline/citation/26369564/Dietary_overlap_and_seasonality_in_three_species_of_mormoopid_bats_from_a_tropical_dry_forest_ L2 - https://doi.org/10.1111/mec.13386 DB - PRIME DP - Unbound Medicine ER -