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Tipo do documento: Artigo
Título: Metacommunity organisation, spatial extent and dispersal in aquatic systems: patterns, processes and prospects
Autor: Heino, Jani
Melo, Adriano Sacnhes
Siqueira, Tadeu
Soininen, Janne
Valanko, Sebastian
Bini, Luis Mauricio
Abstract: 1. Metacommunity ecology addresses the situation where sets of local communities are connected by the dispersal of a number of potentially interacting species. Aquatic systems (e.g. lentic versus lotic versus marine) differ from each other in connectivity and environmental heterogeneity, suggesting that metacommunity organisation also differs between major aquatic systems. Here, we review findings from observational field studies on metacommunity organisation in aquatic systems. 2. Species sorting (i.e. species are ‘filtered’ by environmental factors and occur only at environmentally suitable sites) prevails in aquatic systems, particularly in streams and lakes, but the degree to which dispersal limitation interacts with such environmental control varies among different systems and spatial scales. For example, mainstem rivers and marine coastal systems may be strongly affected by ‘mass effects’ (i.e. where high dispersal rates homogenise communities to some degree at neighbouring localities, irrespective of their abiotic and biotic environmental conditions), whereas isolated lakes and ponds may be structured by dispersal limitation (i.e. some species do not occur at otherwise-suitable localities simply because sites with potential colonists are too far away). Flow directionality in running waters also differs from water movements in other systems, and this difference may also have effects on the role of dispersal in different aquatic systems. 3. Dispersal limitation typically increases with increasing spatial distance between sites, mass effects potentially increase in importance with decreasing distance between sites, and the dispersal ability of organisms may determine the spatial extents at which species sorting and dispersal processes are most important. 4. A better understanding of the relative roles of species sorting, mass effects and dispersal limitation in affecting aquatic metacommunities requires the following: (i) characterising dispersal rates more directly or adopting better proxies than have been used previously; (ii) considering the nature of aquatic networks; (iii) combining correlative and experimental approaches; (iv) exploring temporal aspects of metacommunity organisation and (v) applying past approaches and statistical methods innovatively for increasing our understanding of metacommunity organisation.
Palavras-chave: Dispersal limitation
Dispersal rates
Environmental heterogeneity
Mass effects
Spatial processes
Species sorting
País: brasil
Programa: Programa de Pós-Graduação em Ecologia e Evolução
Citação: HEINO, Jani; MELO, Adriano S.; SIQUEIRA, Tadeu; SOININEN, Janne; VALANKO, Sebastian; BINI, Luis Mauricio. Metacommunity organisation, spatial extent and dispersal in aquatic systems: patterns, processes and prospects. Freshwater Biology, v. 60, p. 845-869, 2014. Disponível em: <>.
Tipo de acesso: Acesso Aberto
Identificador do documento: 10.1111/fwb.12533
Identificador do documento: 10.1111/fwb.12533
Data de publicação: 29-Dez-2014
Aparece nas coleções:ICB - Artigos publicados em periódicos

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