On the interplay of speciation and dispersal: An evolutionary food web model in space

JOURNAL OF THEORETICAL BIOLOGY

卷:366

Article

Allhoff, Korinna T.¹  Weiel, Eva Marie¹  Rogge, Tobias¹  Drossel, Barbara¹ 

[1] Tech Univ Darmstadt, Inst Condensed Matter Phys, D-64289 Darmstadt, Germany

关键词: Evolutionary assembly;    Extinction;    Diversity;    Metacommunity;    Metapopulation;   

DOI  :  10.1016/j.jtbi.2014.11.006

来源: Elsevier

【 摘 要 】

We introduce an evolutionary metacommunity of multitrophic food webs on several habitats coupled by migration. In contrast to previous studies that focus either on evolutionary or on spatial aspects, we include both and investigate the interplay between them. Locally, the species emerge, interact and go extinct according to the rules of the well-known evolutionary food web model proposed by Loeuille and Loreau (2005). Additionally, species are able to migrate between the habitats. With random migration, we are able to reproduce common trends in diversity-dispersal relationships: Regional diversity decreases with increasing migration rates, whereas local diversity can increase in case of a low level of dispersal. Moreover, we find that the total biomasses in the different patches become similar even when species composition remains different. With adaptive migration, we observe species compositions that differ considerably between patches and contain species that are descendant from ancestors on both patches. This result indicates that the combination of spatial aspects and evolutionary processes affects the structure of food webs in different ways than each of them alone. (C) 2014 Elsevier Ltd. All rights reserved.

【 授权许可】

Free