Dinâmica da comunidade de Copepoda (Crustacea, Maxillopoda) no lago Tupé sob a influência da enchente do Rio Negro, Manaus –AM
In the floodplain the variation of the main river water level influences the water level of lakes adjacent to the river. The communities that inhabit these lakes suffer from this influence and are adapted to this change.The studies performed in the Amazon that have analyzed the effects of water l...
| Autor principal: | Raid, Sophia Andrade |
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| Grau: | Dissertação |
| Idioma: | por |
| Publicado em: |
Instituto Nacional de Pesquisas da Amazônia - INPA
2020
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| Assuntos: | |
| Acesso em linha: |
https://repositorio.inpa.gov.br/handle/1/11327 http://lattes.cnpq.br/1736568141282860 |
| Resumo: |
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In the floodplain the variation of the main river water level influences the water level of lakes
adjacent to the river. The communities that inhabit these lakes suffer from this influence and
are adapted to this change.The studies performed in the Amazon that have analyzed the
effects of water level variation in planktonic copepods community were conducted in varzea
lakes, which have different characteristics of black water lakes, these studies are limited to
monthly and fortnightly collections during high and low water periods. This work’s purpose
was oevaluate the effect of the Negro river (black waters) in the composition, richness and
abundance of species of planktonic copepods in Tupé lake. Quantitative samples of the
limnetic region, in three sampling stations in the lake were taken daily during January,
February and March 2011. In the first 10 sampling days there was no influence of the river
and on the 11th day of the Negro river waters begin to flood. A total of 14 taxons of copepods
were recorded, (Oithona amazonica, Macrocyclops albidus albidus, Mesocyclops brasilianus,
Metacyclops brauni, Thermocyclops sp., Aspinus acicularis, Rhacodiaptomus retroflexus,
Rhacodiaptomus calatus, Rhacodiaptomus calamensis, Dasydiaptomus coronatus,
Dactylodiaptomus pearsei, Notodiaptomus inflatus, Notodiaptomus coniferoides, Diaptomus
linus). Diaptomidae was the most representative with 9 species, followed by Cyclopidae who
presented four species and Oithonidae with only one representative. The specie Oithona
amazonica was the most abundant throughout the study, with ist maximum abundance
occurring in the lake's isolation period. The most abundant specie of Calanoida was Aspinus
acicularis which also showed higher abundance in the lake's isolation period. The entrance of
the Negro river waters negatively influenced the abundance of adult copepods and there was
also a decrease in nauplii and copepodites density. However, the diversity and species
richness increased during the rising water period. |