Simulating the role of connectivity in shaping stream insect metacommunities under colonization cycle dynamics

Autor(es)

Duraes, Lucas ^[1] ; Roque, Fabio O. ^[2] ; Siqueira, Tadeu ^[3] ; Santos, Anderson M. ^[4] ; Borges, Magno A. ^[4] ; Rezendee, Renan S. ^[5]

Afiliação do(s) autor(es)

^[1] Inst Chico Mendes Conservacao Biodiversidade ICMB, BR-78580000 Alta Floresta - Brazil

^[2] James Cook Univ, Ctr Trop Environm & Sustainabil Sci TESS, Cairns, Qld 4878 - Australia

^[3] Univ Fed Sao Carlos, Programa PosGrad Ecol & Recursos Nat, BR-13565905 Sao Carlos, SP - Brazil

^[4] Univ Estadual Montes Claros, Programa Posgrad Ciencias Biol, BR-39400344 Montes Claros - Brazil

^[5] Inst Nacl Pesquisas Amazonia INPA CBio, Coordenacao Biodiversidade, BR-69067375 Manaus, Amazonas - Brazil

• Tipo de documento: Artigo Científico
• Fonte: ECOLOGICAL MODELLING; v. 334, p. 19-26, AUG 24 2016.
• Citações Web of Science: 4

Resumo

We simulated metacommunities in a hypothetical riverine network to investigate whether and how connectivity affects the species richness of groups with different dispersal abilities under different niche and dispersal-assembly rules. The simulated network was represented by a graph in which the nodes represented habitat patches, each with a particular environmental condition. We built our model based on Muller's ``colonization cycle{''} hypothesis, in which adult aquatic insects compensate for the gradual downstream movement of larvae by flying preferentially upstream to oviposition. Species occurrence in each patch was probabilistically determined, taking into account environmental filtering and/or dispersal ability in different assembly scenarios. Variation in local species richness was explained by connectivity in both assembly scenarios, especially when dispersal ability was weak. In niche assembly metacommunities, the effect of connectivity was also dependent on the location of preferable patches. In general, local species richness was higher when dispersal ability was strong. Our findings suggest that the role of connectivity in shaping riverine metacommunities is context dependent and that the spatial structure of riverine networks should be considered in monitoring freshwater biota. (C) 2016 Elsevier B.V. All rights reserved. (AU)

• Processo FAPESP: 13/50424-1 - Scaling biodiversity in tropical and boreal streams: implications for diversity mapping and environmental assessment (ScaleBio)
• Beneficiário: Tadeu de Siqueira Barros
• Modalidade de apoio: Auxílio à Pesquisa - Regular