期刊
PLOS COMPUTATIONAL BIOLOGY
卷 13, 期 10, 页码 -出版社
PUBLIC LIBRARY SCIENCE
DOI: 10.1371/journal.pcbi.1005774
关键词
-
资金
- Conselho Nacional de Desenvolvimento Cientifico e Tecnologico Research [CNPq 1435-2012, CNPq 3545-2104, CNPq 5380-2015]
- Fundacao de Amparo a Ciencia e Tecnologia do Estado de Pernambuco (BR) FACEPE [12355]
- Coordenadoria de Aperfeicoamento de Pessoal de Nivel Superior PhD scholarship Capes
- Conselho Nacional de Desenvolvimento Cientifico e Tecnologico postdoc fellowship CNPq
We study through a reaction-diffusion algorithm the influence of landscape diversity on the efficiency of search dynamics. Remarkably, the identical optimal search strategy arises in a wide variety of environments, provided the target density is sparse and the searcher's information is restricted to its close vicinity. Our results strongly impact the current debate on the emergentist vs. evolutionary origins of animal foraging. The inherent character of the optimal solution (i.e., independent on the landscape for the broad scenarios assumed here) suggests an interpretation favoring the evolutionary view, as originally implied by the Levy flight foraging hypothesis. The latter states that, under conditions of scarcity of information and sparse resources, some organisms must have evolved to exploit optimal strategies characterized by heavy-tailed truncated power-law distributions of move lengths. These results strongly suggest that Levy strategies-and hence the selection pressure for the relevant adaptations-are robust with respect to large changes in habitat. In contrast, the usual emergentist explanation seems not able to explain how very similar Levy walks can emerge from all the distinct non-Levy foraging strategies that are needed for the observed large variety of specific environments. We also report that deviations from Levy can take place in plentiful ecosystems, where locomotion truncation is very frequent due to high encounter rates. So, in this case normal diffusion strategies-performing as effectively as the optimal one-can naturally emerge from Levy. Our results constitute the strongest theoretical evidence to date supporting the evolutionary origins of experimentally observed Levy walks.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据