Trait shifts in bird communities from primary forest to human settlements in Mexican seasonal forests. Are there ruderal birds?
Por:
Vazquez-Reyes, Leopoldo D., Paz-Hernandez, Horacio, Godinez-Alvarez, Hector O., Arizmendi M.D.C., Navarro-Siguenza, Adolfo G.
Publicada:
1 abr 2022
Resumen:
Agriculture, cattle grazing, and human settlements negatively affect
bird biodiversity, driving the loss of ecologically specialized species
and favoring the dominance of generalists. Because ecological pressures
define organisms success by acting on their intrinsic traits,
biodiversity loss due to anthropization might cause directional trait
shifts. Here, we use a trait-based approach to find empirical evidence
of trait-shifts in bird communities across an anthropization gradient in
seasonal forests in central Mexico. We performed point-count bird
surveys within a region of tropical deciduous and seasonal oak forests
considering three degrees of anthropization: primary forest, secondary
growth, and human settlements. A multivariate analysis (PCA) showed
similar trait-covariation patterns for both forest types; in the
anthropized habitat the bird communities exhibited shorter life-cycles,
higher fecundity, and broader ecological niches (diet, foraging habitat,
and nesting resources) than those in the primary forests. Our finding of
directional trait shifts resembles Evolutionary Ecological Strategies
Theory (EES) predictions for successful organisms within highly
disturbed anthropized habitats, which are known as a ruderal adaptative
strategy in the EES framework. The use of trait-based approaches could
improve ecological generalizations in bird communities, leading to a
better understanding of avian biodiversity's responses to
anthropization.
(c) 2021 Associacdo Brasileira de Ciencia Ecologica e Conservacao.
Published by Elsevier B.V. This is an open access article under the CC
BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/).
Filiaciones:
Vazquez-Reyes, Leopoldo D.:
Facultad de Estudios Superiores Iztacala, Universidad Nacional Autónoma de México, Avenida de los Barrios # 1, Los Reyes Ixtacala, Tlalnepantla, Estado de México 54090, Mexico
Paz-Hernandez, Horacio:
Instituto de Investigaciones en Ecosistemas y Sustentabilidad, Universidad Nacional Autónoma de México, Antigua Carretera a Pátzcuaro No. 8701, Ex Hacienda de San José de la Huerta, Morelia, Michoacán 58190, Mexico
Center for Stable Isotope Biogeochemistry and the Department of Integrative Biology, University of California, Berkeley, CA 94720, United States
Godinez-Alvarez, Hector O.:
Facultad de Estudios Superiores Iztacala, Universidad Nacional Autónoma de México, Avenida de los Barrios # 1, Los Reyes Ixtacala, Tlalnepantla, Estado de México 54090, Mexico
Arizmendi M.D.C.:
Facultad de Estudios Superiores Iztacala, Universidad Nacional Autónoma de México, Avenida de los Barrios # 1, Los Reyes Ixtacala, Tlalnepantla, Estado de México 54090, Mexico
Navarro-Siguenza, Adolfo G.:
Museo de Zoología, Facultad de Ciencias, Universidad Nacional Autónoma de México, Apartado Postal 70-399, México, D. F. 04510, Mexico
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