Population stability, cooperation, and the invasibility of the human species

Hamilton, Marcus J., Burger, Oskar F., DeLong, John P., Walker, Robert S., Moses, Melanie E., Brown, James H. (2009) Population stability, cooperation, and the invasibility of the human species. Proceedings of the National Academy of Sciences of the United States of America, 106 (30). pp. 12255-12260. ISSN 1091-6490. E-ISSN 1091-6490. (doi:10.1073/pnas.0905708106) (The full text of this publication is not currently available from this repository. You may be able to access a copy if URLs are provided)

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Official URL
http://dx.doi.org/10.1073/pnas.0905708106

Abstract

The biogeographic expansion of modern humans out of Africa began ?50,000 years ago. This expansion resulted in the colonization of most of the land area and habitats throughout the globe and in the replacement of preexisting hominid species. However, such rapid population growth and geographic spread is somewhat unexpected for a large primate with a slow, density-dependent life history. Here, we suggest a mechanism for these outcomes by modifying a simple density-dependent population model to allow varying levels of intraspecific competition for finite resources. Reducing intraspecific competition increases carrying capacities, growth rates, and stability, including persistence times and speed of recovery from perturbations. Our model suggests that the energetic benefits of cooperation in modern humans may have outweighed the slow rate of human population growth, effectively ensuring that once modern humans colonized a region long-term population persistence was near inevitable. Our model also provides insight into the interplay of structural complexity and stability in social species.

Item Type: Article
DOI/Identification number: 10.1073/pnas.0905708106
Additional information: Unmapped bibliographic data: DA - 2009/// [EPrints field already has value set] DP - Google Scholar [Field not mapped to EPrints]
Uncontrolled keywords: density dependence; hunter–gatherers; intraspecific competition; population ecology; range expansion;
Subjects: Q Science
Divisions: Faculties > Social Sciences > School of Anthropology and Conservation
Faculties > Social Sciences > School of Anthropology and Conservation > Biological Anthropology
Depositing User: Oskar Burger
Date Deposited: 11 Jan 2016 12:38 UTC
Last Modified: 29 May 2019 16:51 UTC
Resource URI: https://kar.kent.ac.uk/id/eprint/53670 (The current URI for this page, for reference purposes)
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