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Artículo

On the roles of hunting and habitat size on the extinction of megafauna

Abramson, GuillermoIcon ; Laguna, Maria FabianaIcon ; Kuperman, Marcelo NestorIcon ; Monjeau, Jorge AdrianIcon ; Lanata, Jose LuisIcon
Fecha de publicación: 02/2017
Editorial: Pergamon-Elsevier Science Ltd
Revista: Quaternary International
ISSN: 1040-6182
Idioma: Inglés
Tipo de recurso: Artículo publicado
Clasificación temática:
Otras Ciencias Biológicas

Resumen

We study a mechanistic mathematical model of extinction and coexistence in a generic hunter-prey ecosystem. The model represents typical scenarios of human invasion and environmental change, characteristic of the late Pleistocene, concomitant with the extinction of fauna in many regions of the world. As a first approach we focus on a small trophic web of three species, including two herbivores in asymmetric competition, in order to characterize the generic behaviors. Specifically, we use a stochastic dynamical system, allowing the study of the role of fluctuations and spatial correlations. We show that the presence of hunters drives the superior herbivore to extinction even in habitats that would allow coexistence, and even when the pressure of hunting is lower than on the inferior one. The role of system size and fluctuating populations is addressed, showing an ecological meltdown in small systems in the presence of humans. The time to extinction as a function of the system size, as calculated with the model, shows a good agreement with paleontological data. Other findings show the intricate play of the anthropic and environmental factors that may have caused the extinction of megafauna.
Palabras clave: Competition , Extinction , Hunter-Gatherers , South American Megafauna
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info:eu-repo/semantics/openAccess Excepto donde se diga explícitamente, este item se publica bajo la siguiente descripción: Creative Commons Attribution-NonCommercial-ShareAlike 2.5 Unported (CC BY-NC-SA 2.5)
Identificadores
URI: http://hdl.handle.net/11336/50245
DOI: https://dx.doi.org/10.1016/j.quaint.2015.08.043
URL: https://www.sciencedirect.com/science/article/pii/S1040618215008150
Colecciones
Articulos(CCT - PATAGONIA NORTE)
Articulos de CTRO.CIENTIFICO TECNOL.CONICET - PATAGONIA NORTE
Citación
Abramson, Guillermo; Laguna, Maria Fabiana; Kuperman, Marcelo Nestor; Monjeau, Jorge Adrian; Lanata, Jose Luis; On the roles of hunting and habitat size on the extinction of megafauna; Pergamon-Elsevier Science Ltd; Quaternary International; 431; 2-2017; 205-215
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