Tracking of spatial changes in the structure of the zooplankton community according to multiple abiotic factors along a hypersaline lagoon

In this study we evaluated the effects of changes in salinity, temperature, pH and dissolved oxygen on the spatiotemporal variation of zooplankton. Samples were collected in January-March, May; October-December 2010; and January-March 2011 in the Araruama lagoon, state of Rio de Janeiro, Brazil. The...

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Published inNauplius Vol. 28; p. e2020012
Main Authors Rosa, Judson da Cruz Lopes da, Batista, Lucas Lemos, Monteiro-Ribas, Wanda Maria
Format Journal Article
LanguageEnglish
Portuguese
Published Cruz das Almas Sociedade Brasileira de Carcinologia 2020
Subjects
Abiotic factors
Acartia tonsa
Aquatic crustaceans
Araruama lagoon
bioindicator species
Brackish
Cirripedia
Dissolved oxygen
Environmental conditions
Eutrophication
Fixed stations
Indicator organisms
Lagoons
Larvae
Limiting factors
Marine
Monstrilla bahiana
New records
Plankton
Salinity
Temperature
Tracking
ZOOLOGY
Zooplankton
Brazil, Rio de Janeiro, Araruama Lagoon
temperature
Araruama lagoon
bioindicator species
Acartia tonsa
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Summary:In this study we evaluated the effects of changes in salinity, temperature, pH and dissolved oxygen on the spatiotemporal variation of zooplankton. Samples were collected in January-March, May; October-December 2010; and January-March 2011 in the Araruama lagoon, state of Rio de Janeiro, Brazil. There were eight fixed stations sampled using a WP2 net equipped with a flow meter. The zooplankton diversity of the Araruama lagoon was low and dominated by Cirripedia larvae and by the copepod Acartia tonsa, which is an indicator species of eutrophication. In general, a few species from the Cabo Frio region were able to adapt to the conditions of this hypersaline lagoon. In addition, a specimen of Monstrilla bahiana (Monstrilloidae) was found at a salinity of 46. This is the first record of the order Monstrilloida in the region of Cabo Frio. Temperature, salinity and pH were shown to be limiting factors for the species present in the lagoon since Cirripedia seemed to avoid releasing their larvae under unfavorable environmental conditions. The abundance of A. tonsa was always associated with that of Cirripedia larvae, and it was higher at cooler temperatures
ISSN:2358-2936
0104-6497
2358-2936
DOI:10.1590/2358-2936e2020012