1. Influence of the chlorophyll-a gradient on the community structure of plankton microcrustaceans (Cladocera and Copepoda) in a Neotropical reservoir
- Author
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Tatiane Mantovano, Vanessa Graciele Tibúrcio, João Vitor Fonseca da Silva, and Claudia Costa Bonecker
- Subjects
Chlorophyll ,zooplankton ,Science ,Species distribution ,Zooplankton ,Copepoda ,primary productivity ,Animals ,anthropic activity ,Ecosystem ,Relative species abundance ,Trophic level ,Multidisciplinary ,biology ,Ecology ,Chlorophyll A ,fungi ,Plankton ,biology.organism_classification ,Cladocera ,trophy reservoir ,Eutrophication ,Brazil - Abstract
Fish farming in net cages is considered as an alternative to food production in response to elevated population growth, and zooplankton is an important resource to the development of this economic activity. We (i) compared microcrustacean composition in eutrophic and oligotrophic habitats under net tank influence, (ii) investigated changes in species distributions in these habitats, and (iii) indicated which chlorophyll-a concentrations presented thresholds that alter community structure. We expected different responses of species to changes in chlorophyll-a concentration due to net cage management, as chlorophyll-a represents an estimate of food availability. Microcrustacean samplings and chlorophyll-a estimation were made upstream, downstream and close to the net cages, during 120 days, in the Rosana Reservoir (Brazil). Species composition differed significantly (p
- Published
- 2021