Title |
Top-predator control-induced trophic cascades: an alternative hypothesis to the conclusion of Colman et al.
|
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Published in |
Proceedings of the Royal Society B: Biological Sciences, January 2015
|
DOI | 10.1098/rspb.2014.1251 |
Pubmed ID | |
Authors |
Benjamin L. Allen |
Abstract |
Colman et al. (2014 Proc. R. Soc. B 281, 20133094. (doi:10.1098/rspb.2013.3094)) recently argued that observed positive relationships between dingoes and small mammals were a result of top-down processes whereby lethal dingo control reduced dingoes and increased mesopredators and herbivores, which then suppressed small mammals. Here, I show that the prerequisite negative effects of dingo control on dingoes were not shown, and that the same positive relationships observed may simply represent well-known bottom-up processes whereby more generalist predators are found in places with more of their preferred prey. Identification of top-predator control-induced trophic cascades first requires demonstration of some actual effect of control on predators, typically possible only through manipulative experiments with the ability to identify cause and effect. |
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Mendeley readers
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