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Factors affecting the metacommunity structure of major freshwater invertebrate groups
Nagy, Alexander ; Juračka, Petr Jan (advisor) ; Černý, Martin (referee)
Freshwater organism communities are dependent on the ability of dispersion among habitats through inhospitable terrestrial environment. Therefore, these organisms have developed a variety of dispersal mechanisms. Some species are able to overcome barriers via active dispersion, but most freshwater invertebrates are passive dispersers, depending on abiotic or biotic vectors. Abiotic vectors are e.g., wind or floods, while biotic vectors are other animals such as birds. By linking several locations with dispersion, and thus with a gene flow, a meta- community is created. This is influenced by many factors, including habitat abiotic conditions, especially altitude, and biotic interactions, such as competition and predation. Freshwater invertebrate communities are very complex and influenced by many factors with varying degrees of influence.
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