Zooplanktonic community of six reservoirs in northeast Brazil

The aim of the present study was to investigate the zooplankton community at six reservoirs in the state of Pernambuco (Brazil). Zooplankton assemblages were identified using current literature and quantitatively analysed under a microscope and stereomicroscope. Concurrently to the sampling of zoopl...

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Main Authors: VLS. Almeida, ÊW. Dantas, M. Melo-Júnior, MC. Bittencourt-Oliveira, AN. Moura
Format: Article
Language:English
Published: Instituto Internacional de Ecologia
Series:Brazilian Journal of Biology
Subjects:
Online Access:http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1519-69842009000100007&lng=en&tlng=en
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author VLS. Almeida
ÊW. Dantas
M. Melo-Júnior
MC. Bittencourt-Oliveira
AN. Moura
author_facet VLS. Almeida
ÊW. Dantas
M. Melo-Júnior
MC. Bittencourt-Oliveira
AN. Moura
author_sort VLS. Almeida
collection DOAJ
description The aim of the present study was to investigate the zooplankton community at six reservoirs in the state of Pernambuco (Brazil). Zooplankton assemblages were identified using current literature and quantitatively analysed under a microscope and stereomicroscope. Concurrently to the sampling of zooplanktonic and phytoplanktonic communities, in situ measurements of abiotic variables, such as water temperature, dissolved oxygen and pH, were determined using field probes and transparency was determined with a Secchi disk. Total phosphorus concentrations were used for the determination of the Trophic State Index. The reservoirs were classified between eutrophic and hypertrophic, oxygenated, with pH varying from slightly acid to alkaline, high temperatures and low water transparency. A total of 27 zooplankton taxa were identified. Phytoplankton was represented by Cyanophyta, Chlorophyta, Baccilariophyta and phytoflagellates. The highest richness of species was observed for Rotifera (17), followed by Crustacea (8), Protozoa (1) and Insecta (1). Rotifers shared quantitative importance with Crustacea, which were mainly represented by juvenile forms. Jazigo Reservoir presented the highest diversity and equitability. Lowest diversity and equitability were recorded at the Poço da Cruz and Mundaú reservoirs, respectively. Dissimilarity was detected between the environments studied regarding zooplankton composition and structure.
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spelling doaj.art-75bb528358df45498640368f51a429ea2022-12-21T18:51:21ZengInstituto Internacional de EcologiaBrazilian Journal of Biology1678-4375691576510.1590/S1519-69842009000100007S1519-69842009000100007Zooplanktonic community of six reservoirs in northeast BrazilVLS. Almeida0ÊW. Dantas1M. Melo-Júnior2MC. Bittencourt-Oliveira3AN. Moura4Universidade Federal de São CarlosUniversidade Federal Rural de PernambucoUniversidade de São PauloUniversidade de São PauloUniversidade Federal Rural de PernambucoThe aim of the present study was to investigate the zooplankton community at six reservoirs in the state of Pernambuco (Brazil). Zooplankton assemblages were identified using current literature and quantitatively analysed under a microscope and stereomicroscope. Concurrently to the sampling of zooplanktonic and phytoplanktonic communities, in situ measurements of abiotic variables, such as water temperature, dissolved oxygen and pH, were determined using field probes and transparency was determined with a Secchi disk. Total phosphorus concentrations were used for the determination of the Trophic State Index. The reservoirs were classified between eutrophic and hypertrophic, oxygenated, with pH varying from slightly acid to alkaline, high temperatures and low water transparency. A total of 27 zooplankton taxa were identified. Phytoplankton was represented by Cyanophyta, Chlorophyta, Baccilariophyta and phytoflagellates. The highest richness of species was observed for Rotifera (17), followed by Crustacea (8), Protozoa (1) and Insecta (1). Rotifers shared quantitative importance with Crustacea, which were mainly represented by juvenile forms. Jazigo Reservoir presented the highest diversity and equitability. Lowest diversity and equitability were recorded at the Poço da Cruz and Mundaú reservoirs, respectively. Dissimilarity was detected between the environments studied regarding zooplankton composition and structure.http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1519-69842009000100007&lng=en&tlng=enzooplanktonreservoirsdiversityTrophic Index Statenortheast Brazil
spellingShingle VLS. Almeida
ÊW. Dantas
M. Melo-Júnior
MC. Bittencourt-Oliveira
AN. Moura
Zooplanktonic community of six reservoirs in northeast Brazil
Brazilian Journal of Biology
zooplankton
reservoirs
diversity
Trophic Index State
northeast Brazil
title Zooplanktonic community of six reservoirs in northeast Brazil
title_full Zooplanktonic community of six reservoirs in northeast Brazil
title_fullStr Zooplanktonic community of six reservoirs in northeast Brazil
title_full_unstemmed Zooplanktonic community of six reservoirs in northeast Brazil
title_short Zooplanktonic community of six reservoirs in northeast Brazil
title_sort zooplanktonic community of six reservoirs in northeast brazil
topic zooplankton
reservoirs
diversity
Trophic Index State
northeast Brazil
url http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1519-69842009000100007&lng=en&tlng=en
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AT mmelojunior zooplanktoniccommunityofsixreservoirsinnortheastbrazil
AT mcbittencourtoliveira zooplanktoniccommunityofsixreservoirsinnortheastbrazil
AT anmoura zooplanktoniccommunityofsixreservoirsinnortheastbrazil