Informations et ressources scientifiques
sur le développement des zones arides et semi-arides

Titre : Ecomorfologia da ictiofauna de reservatórios do semiárido

Auteur : Lima, Railla Maria Oliveira

Université de soutenance : Universidade Estadual da Paraíba

Grade : Mestre em Ecologia e Conservação 2019

Résumé partiel
Considered a highly diverse group, freshwater fish communities are greatly influenced by disturbances to aquatic environments. The northeastern semi-arid region, which was considered for a long time little diverse, supports rich communities and endemic species, according to current studies, but the region’s environmental conditions such as low precipitation, temperature increase and habitat loss are factors that affect the region. maintenance and structuring of these communities. The association of these factors with human action, such as the construction of water storage dams, can affect the way these ecosystems function due to their dynamics. Since these artificial ecosystems are considered heterogeneous and complex, with chemical and physical multiformity, reservoir river connectivity will determine the conditions and integrity of these ecosystems, as well as predation as it is responsible for regulating prey through top-down control. Considering the peculiar characteristics of these ecosystems, studies have been directed to understand the structure of the ichthyological communities in the region, which are influenced by smaller scale abiotic elements and larger scale abiotic elements. In the environment, the availability of resources has great interference in exploitation and forms of interactions between species, since its abundant availability is exploited widely and when scarce, is exploited in a specialized way due to the intensification of predation and competition,

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