Spatial and temporal distribution of free-living protozoa in aquatic environments of a Brazilian semi-arid region
Autor(a) principal: | |
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Data de Publicação: | 2013 |
Outros Autores: | , , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Revista Ambiente & Água |
Texto Completo: | http://old.scielo.br/scielo.php?script=sci_arttext&pid=S1980-993X2013000200006 |
Resumo: | Free-living protozoa organisms are distributed in aquatic environments and vary widely in both qualitative and quantitative terms. The unique ecological functions they exhibit in their habitats help to maintain the dynamic balance of these environments. Despite their wide range and abundance, studies on geographical distribution and ecology, when compared to other groups, are still scarce. This study aimed to identify and record the occurrence of free-living protozoa at three points in Piancó-Piranhas-Açu basin, in a semi-arid area of Rio Grande do Norte (RN) state, and to relate the occurrence of taxa with variations in chlorophyll a, pH and temperature in the environments. Samples were collected in the Armando Ribeiro Gonçalves Dam, from two lentic environments upstream and a lotic ecosystem downstream. Sixty-five taxa of free-living protozoa were found. The Student's t-test showed significant inter-variable differences (p <0.05). Similar protozoan species were recorded under different degrees of trophic status according to chlorophyll a concentrations, suggesting the organisms identified are not ideal for indicating trophic level. We hypothesize that food availability, the influence of lentic and lotic systems and the presence of aquatic macrophytes influenced protozoan dynamics during the study period. |
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Spatial and temporal distribution of free-living protozoa in aquatic environments of a Brazilian semi-arid regionPlanktonic microorganismsreservoirsbiodiversityFree-living protozoa organisms are distributed in aquatic environments and vary widely in both qualitative and quantitative terms. The unique ecological functions they exhibit in their habitats help to maintain the dynamic balance of these environments. Despite their wide range and abundance, studies on geographical distribution and ecology, when compared to other groups, are still scarce. This study aimed to identify and record the occurrence of free-living protozoa at three points in Piancó-Piranhas-Açu basin, in a semi-arid area of Rio Grande do Norte (RN) state, and to relate the occurrence of taxa with variations in chlorophyll a, pH and temperature in the environments. Samples were collected in the Armando Ribeiro Gonçalves Dam, from two lentic environments upstream and a lotic ecosystem downstream. Sixty-five taxa of free-living protozoa were found. The Student's t-test showed significant inter-variable differences (p <0.05). Similar protozoan species were recorded under different degrees of trophic status according to chlorophyll a concentrations, suggesting the organisms identified are not ideal for indicating trophic level. We hypothesize that food availability, the influence of lentic and lotic systems and the presence of aquatic macrophytes influenced protozoan dynamics during the study period.Instituto de Pesquisas Ambientais em Bacias Hidrográficas2013-08-01info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersiontext/htmlhttp://old.scielo.br/scielo.php?script=sci_arttext&pid=S1980-993X2013000200006Revista Ambiente & Água v.8 n.2 2013reponame:Revista Ambiente & Águainstname:Instituto de Pesquisas Ambientais em Bacias Hidrográficas (IPABHI)instacron:IPABHI10.4136/ambi-agua.1129info:eu-repo/semantics/openAccessMedeiros,Maria Luisa Quinino deAraújo,Magnólia Fernandes Florêncio deSodré Neto,LuizAmorim,Aline de Souzaeng2013-10-08T00:00:00Zoai:scielo:S1980-993X2013000200006Revistahttp://www.ambi-agua.net/PUBhttps://old.scielo.br/oai/scielo-oai.php||ambi.agua@gmail.com1980-993X1980-993Xopendoar:2013-10-08T00:00Revista Ambiente & Água - Instituto de Pesquisas Ambientais em Bacias Hidrográficas (IPABHI)false |
dc.title.none.fl_str_mv |
Spatial and temporal distribution of free-living protozoa in aquatic environments of a Brazilian semi-arid region |
title |
Spatial and temporal distribution of free-living protozoa in aquatic environments of a Brazilian semi-arid region |
spellingShingle |
Spatial and temporal distribution of free-living protozoa in aquatic environments of a Brazilian semi-arid region Medeiros,Maria Luisa Quinino de Planktonic microorganisms reservoirs biodiversity |
title_short |
Spatial and temporal distribution of free-living protozoa in aquatic environments of a Brazilian semi-arid region |
title_full |
Spatial and temporal distribution of free-living protozoa in aquatic environments of a Brazilian semi-arid region |
title_fullStr |
Spatial and temporal distribution of free-living protozoa in aquatic environments of a Brazilian semi-arid region |
title_full_unstemmed |
Spatial and temporal distribution of free-living protozoa in aquatic environments of a Brazilian semi-arid region |
title_sort |
Spatial and temporal distribution of free-living protozoa in aquatic environments of a Brazilian semi-arid region |
author |
Medeiros,Maria Luisa Quinino de |
author_facet |
Medeiros,Maria Luisa Quinino de Araújo,Magnólia Fernandes Florêncio de Sodré Neto,Luiz Amorim,Aline de Souza |
author_role |
author |
author2 |
Araújo,Magnólia Fernandes Florêncio de Sodré Neto,Luiz Amorim,Aline de Souza |
author2_role |
author author author |
dc.contributor.author.fl_str_mv |
Medeiros,Maria Luisa Quinino de Araújo,Magnólia Fernandes Florêncio de Sodré Neto,Luiz Amorim,Aline de Souza |
dc.subject.por.fl_str_mv |
Planktonic microorganisms reservoirs biodiversity |
topic |
Planktonic microorganisms reservoirs biodiversity |
description |
Free-living protozoa organisms are distributed in aquatic environments and vary widely in both qualitative and quantitative terms. The unique ecological functions they exhibit in their habitats help to maintain the dynamic balance of these environments. Despite their wide range and abundance, studies on geographical distribution and ecology, when compared to other groups, are still scarce. This study aimed to identify and record the occurrence of free-living protozoa at three points in Piancó-Piranhas-Açu basin, in a semi-arid area of Rio Grande do Norte (RN) state, and to relate the occurrence of taxa with variations in chlorophyll a, pH and temperature in the environments. Samples were collected in the Armando Ribeiro Gonçalves Dam, from two lentic environments upstream and a lotic ecosystem downstream. Sixty-five taxa of free-living protozoa were found. The Student's t-test showed significant inter-variable differences (p <0.05). Similar protozoan species were recorded under different degrees of trophic status according to chlorophyll a concentrations, suggesting the organisms identified are not ideal for indicating trophic level. We hypothesize that food availability, the influence of lentic and lotic systems and the presence of aquatic macrophytes influenced protozoan dynamics during the study period. |
publishDate |
2013 |
dc.date.none.fl_str_mv |
2013-08-01 |
dc.type.driver.fl_str_mv |
info:eu-repo/semantics/article |
dc.type.status.fl_str_mv |
info:eu-repo/semantics/publishedVersion |
format |
article |
status_str |
publishedVersion |
dc.identifier.uri.fl_str_mv |
http://old.scielo.br/scielo.php?script=sci_arttext&pid=S1980-993X2013000200006 |
url |
http://old.scielo.br/scielo.php?script=sci_arttext&pid=S1980-993X2013000200006 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
10.4136/ambi-agua.1129 |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
dc.format.none.fl_str_mv |
text/html |
dc.publisher.none.fl_str_mv |
Instituto de Pesquisas Ambientais em Bacias Hidrográficas |
publisher.none.fl_str_mv |
Instituto de Pesquisas Ambientais em Bacias Hidrográficas |
dc.source.none.fl_str_mv |
Revista Ambiente & Água v.8 n.2 2013 reponame:Revista Ambiente & Água instname:Instituto de Pesquisas Ambientais em Bacias Hidrográficas (IPABHI) instacron:IPABHI |
instname_str |
Instituto de Pesquisas Ambientais em Bacias Hidrográficas (IPABHI) |
instacron_str |
IPABHI |
institution |
IPABHI |
reponame_str |
Revista Ambiente & Água |
collection |
Revista Ambiente & Água |
repository.name.fl_str_mv |
Revista Ambiente & Água - Instituto de Pesquisas Ambientais em Bacias Hidrográficas (IPABHI) |
repository.mail.fl_str_mv |
||ambi.agua@gmail.com |
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1752129748639678464 |