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22 February 2019 Foraging behavioural traits of tropical insectivorous birds lead to dissimilar communities in contrasting forest habitats
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Abstract

Many deforested areas worldwide have been planted with Alnus spp. to protect watersheds and soils. However, the effects of these plantations on biodiversity are little known yet. Contrasting forest types may impose strong environmental filters to some behavioural traits, leading to dissimilar communities. Insectivorous birds are known to be sensitive to changes in habitat structure due to their specialized foraging behaviour. We contrasted species richness, abundance and composition of insectivorous birds, according to functional behaviour groups (foraging strategy and stratum), between secondary forest stands and Andean alder Alnus acuminata plantations, to assess how contrasting forest types affect this bird group in the Colombian Andes. Insectivorous bird species richness and abundance were higher at the Alder plantation rather than at the secondary forest, resulting in dissimilar communities. In this regard, forest plantations act as a positive filter for foliage gleaners and flycatchers, whereas secondary forests act as a positive filter for bark foragers. Secondary forests and alder plantations impose different ecological scenarios to insectivorous birds, related to foraging strategies and foraging stratum, which ultimately leads to a dissimilar species composition.

© 2019 The Authors. This is an Open Access article This work is licensed under the terms of a Creative Commons Attribution 4.0 International License (CC-BY). The license permits use, distribution and reproduction in any medium, provided the original work is properly cited.
Gabriel J. Castaño-Villa, Rafael Santisteban-Arenas, Alejandro Hoyos-Jaramillo, Jaime V. Estévez-Varón, and Francisco E. Fontúrbel "Foraging behavioural traits of tropical insectivorous birds lead to dissimilar communities in contrasting forest habitats," Wildlife Biology 2019(1), (22 February 2019). https://doi.org/10.2981/wlb.00483
Accepted: 15 January 2019; Published: 22 February 2019
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