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Variation in abundance and habitat relationship of three understory insectivorous birds in a disturbed landscape of Neotropical dry forest of Colombia

Fecha

2020-09-02

Autores

Loaiza, Camilo
Montenegro, Olga L.
King, David
Spínola, Manuel
Palacio, Lilibeth Arinda
Rudas, Agustín

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Editor

BioMed Central Ltd

Resumen

Background: Evaluating relationships between avian populations and their habitat is important for understanding the biology of these species and for management decisions that improve the efectiveness of restoration practices. We investigated how habitat variation along a disturbance gradient afected the abundance of three insectivorous bird species, White-bellied Antbird (Myrmeciza longipes), Barred Antshrike (Thamnophilus doliatus), and Pale-breasted Spinetail (Synallaxis albescens) in a Neotropical dry forest remnant in central Colombia. Methods: The study area, which is located in Magdalena Valley, is under ecological restoration after the construction of the “El Quimbo” hydroelectric dam, with a gradient of habitat conditions, from relatively advanced secondary growth to recently disturbed areas. We conducted bird surveys and quantifed the habitat conditions from June 2018 to June 2019. We compared the relative abundance of the birds among the three zones with increasing disturbance and modeled the relationship between the bird abundance with the micro- and landscape-habitat conditions, with Poisson generalized linear model regression. Results: The relative abundance of the three bird species varied according to the habitat features and disturbance level. The abundance of White-bellied Antbirds was higher in forests and thickets than shrubland fragments; Barred Antshrike was more abundant in shrubland and thickets than in forest fragments, and Pale-breasted Spinetail had the highest abundance in shrubland and the lowest in forest fragments. The abundance of both White-bellied Antbird and Pale-breasted Spinetail did not difer among zones with diferent levels of disturbance, while the abundance of Barred Antshrike decreased in zones with more disturbance. Conclusions: There were signifcant diferences in the habitat relationships of the three understory insectivorous species along the disturbance gradient, although these species were within the same trophic group. These bird species preferred diferent stages of habitat succession and responded to diferent habitat and landscape features. Increasing forest fragment areas and decreasing the amount of edge would be useful restoration priorities for these and other similar avian species in this study area.

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Se seleccionó la licencia Creative Commons para este envío. El documento trae lo siguiente: © The Author(s) 2020. This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons licence, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons licence, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons licence and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this licence, visit http://creative commons.org/licenses/by/4.0/. The Creative Commons Public Domain Dedication waiver (http://creativecommons.org/publicdomain/zero/1.0/) applies to the data made available in this article, unless otherwise stated in a credit line to the data.(En caso de duda consultar a Meilyn Garro).

Palabras clave

BIRD POPULATION ECOLOGY, GENERALIZED LINEAR MODELS, WILDLIFE HABITAT RESTORATION, ECOLOGÍA DE LAS POBLACIONES DE AVES, MODELOS LINEALES GENERALIZADOS, RESTAURACIÓN DE HÁBITATS SILVESTRES

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