Potential effects of mechanically removing macrophytes on the phytoplankton community of a subtropical reservoir
Autor(a) principal: | |
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Data de Publicação: | 2018 |
Outros Autores: | , , , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Acta Botanica Brasilica |
Texto Completo: | http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0102-33062018000400588 |
Resumo: | ABSTRACT Intensive growth of aquatic macrophytes interferes with water quality and ecosystem dynamics worldwide. Although mechanically removing macrophytes is the most commonly used method for their eradication, it can also cause undesirable disturbances in aquatic reservoir communities. We performed laboratory incubations of phytoplankton sampled before and after macrophytes were mechanically removed from the Piraquara II reservoir, South Brazil. We analyzed changes in growth and composition of the main phytoplankton groups with respect to nutrient shifting. Prior to removing the macrophytes, the phytoplankton community was dominated by low cell abundances of diatoms and flagellates. In contrast, growth rates of cyanobacteria (mainly Cylindrospermopsis raciborskii, Pseudanabaena sp., and Geitlerinema sp.) and of colonial chlorophytes were favored after macrophyte removal, while the abundances of diatoms and flagellates decreased. Our results suggest that removing macrophytes causes dramatic changes in phytoplankton composition and biomass and selects for toxigenic species of cyanobacteria. These changes were probably associated with the disturbance caused by removing the macrophytes, which immediately created new environmental conditions prone to species competition. These findings indicate that the use of mechanical techniques to manage macrophytes should be carefully considered, along with monitoring of harmful species and changes of limnological parameters. |
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Potential effects of mechanically removing macrophytes on the phytoplankton community of a subtropical reservoirchlorophytescyanobacteriadiatomsmacrophytesmechanical removalphytoplanktonreservoir managementABSTRACT Intensive growth of aquatic macrophytes interferes with water quality and ecosystem dynamics worldwide. Although mechanically removing macrophytes is the most commonly used method for their eradication, it can also cause undesirable disturbances in aquatic reservoir communities. We performed laboratory incubations of phytoplankton sampled before and after macrophytes were mechanically removed from the Piraquara II reservoir, South Brazil. We analyzed changes in growth and composition of the main phytoplankton groups with respect to nutrient shifting. Prior to removing the macrophytes, the phytoplankton community was dominated by low cell abundances of diatoms and flagellates. In contrast, growth rates of cyanobacteria (mainly Cylindrospermopsis raciborskii, Pseudanabaena sp., and Geitlerinema sp.) and of colonial chlorophytes were favored after macrophyte removal, while the abundances of diatoms and flagellates decreased. Our results suggest that removing macrophytes causes dramatic changes in phytoplankton composition and biomass and selects for toxigenic species of cyanobacteria. These changes were probably associated with the disturbance caused by removing the macrophytes, which immediately created new environmental conditions prone to species competition. These findings indicate that the use of mechanical techniques to manage macrophytes should be carefully considered, along with monitoring of harmful species and changes of limnological parameters.Sociedade Botânica do Brasil2018-12-01info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersiontext/htmlhttp://old.scielo.br/scielo.php?script=sci_arttext&pid=S0102-33062018000400588Acta Botanica Brasilica v.32 n.4 2018reponame:Acta Botanica Brasilicainstname:Sociedade Botânica do Brasil (SBB)instacron:SBB10.1590/0102-33062018abb0015info:eu-repo/semantics/openAccessWojciechowski,JulianaBurda,Tamires MarcelaScheer,Mauricio BergaminiCosta,Elaine Aparecida Dias daFernandes,Luciano Felícioeng2018-09-05T00:00:00Zoai:scielo:S0102-33062018000400588Revistahttps://www.scielo.br/j/abb/ONGhttps://old.scielo.br/oai/scielo-oai.phpacta@botanica.org.br||acta@botanica.org.br|| f.a.r.santos@gmail.com1677-941X0102-3306opendoar:2018-09-05T00:00Acta Botanica Brasilica - Sociedade Botânica do Brasil (SBB)false |
dc.title.none.fl_str_mv |
Potential effects of mechanically removing macrophytes on the phytoplankton community of a subtropical reservoir |
title |
Potential effects of mechanically removing macrophytes on the phytoplankton community of a subtropical reservoir |
spellingShingle |
Potential effects of mechanically removing macrophytes on the phytoplankton community of a subtropical reservoir Wojciechowski,Juliana chlorophytes cyanobacteria diatoms macrophytes mechanical removal phytoplankton reservoir management |
title_short |
Potential effects of mechanically removing macrophytes on the phytoplankton community of a subtropical reservoir |
title_full |
Potential effects of mechanically removing macrophytes on the phytoplankton community of a subtropical reservoir |
title_fullStr |
Potential effects of mechanically removing macrophytes on the phytoplankton community of a subtropical reservoir |
title_full_unstemmed |
Potential effects of mechanically removing macrophytes on the phytoplankton community of a subtropical reservoir |
title_sort |
Potential effects of mechanically removing macrophytes on the phytoplankton community of a subtropical reservoir |
author |
Wojciechowski,Juliana |
author_facet |
Wojciechowski,Juliana Burda,Tamires Marcela Scheer,Mauricio Bergamini Costa,Elaine Aparecida Dias da Fernandes,Luciano Felício |
author_role |
author |
author2 |
Burda,Tamires Marcela Scheer,Mauricio Bergamini Costa,Elaine Aparecida Dias da Fernandes,Luciano Felício |
author2_role |
author author author author |
dc.contributor.author.fl_str_mv |
Wojciechowski,Juliana Burda,Tamires Marcela Scheer,Mauricio Bergamini Costa,Elaine Aparecida Dias da Fernandes,Luciano Felício |
dc.subject.por.fl_str_mv |
chlorophytes cyanobacteria diatoms macrophytes mechanical removal phytoplankton reservoir management |
topic |
chlorophytes cyanobacteria diatoms macrophytes mechanical removal phytoplankton reservoir management |
description |
ABSTRACT Intensive growth of aquatic macrophytes interferes with water quality and ecosystem dynamics worldwide. Although mechanically removing macrophytes is the most commonly used method for their eradication, it can also cause undesirable disturbances in aquatic reservoir communities. We performed laboratory incubations of phytoplankton sampled before and after macrophytes were mechanically removed from the Piraquara II reservoir, South Brazil. We analyzed changes in growth and composition of the main phytoplankton groups with respect to nutrient shifting. Prior to removing the macrophytes, the phytoplankton community was dominated by low cell abundances of diatoms and flagellates. In contrast, growth rates of cyanobacteria (mainly Cylindrospermopsis raciborskii, Pseudanabaena sp., and Geitlerinema sp.) and of colonial chlorophytes were favored after macrophyte removal, while the abundances of diatoms and flagellates decreased. Our results suggest that removing macrophytes causes dramatic changes in phytoplankton composition and biomass and selects for toxigenic species of cyanobacteria. These changes were probably associated with the disturbance caused by removing the macrophytes, which immediately created new environmental conditions prone to species competition. These findings indicate that the use of mechanical techniques to manage macrophytes should be carefully considered, along with monitoring of harmful species and changes of limnological parameters. |
publishDate |
2018 |
dc.date.none.fl_str_mv |
2018-12-01 |
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=S0102-33062018000400588 |
url |
http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0102-33062018000400588 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
10.1590/0102-33062018abb0015 |
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 |
Sociedade Botânica do Brasil |
publisher.none.fl_str_mv |
Sociedade Botânica do Brasil |
dc.source.none.fl_str_mv |
Acta Botanica Brasilica v.32 n.4 2018 reponame:Acta Botanica Brasilica instname:Sociedade Botânica do Brasil (SBB) instacron:SBB |
instname_str |
Sociedade Botânica do Brasil (SBB) |
instacron_str |
SBB |
institution |
SBB |
reponame_str |
Acta Botanica Brasilica |
collection |
Acta Botanica Brasilica |
repository.name.fl_str_mv |
Acta Botanica Brasilica - Sociedade Botânica do Brasil (SBB) |
repository.mail.fl_str_mv |
acta@botanica.org.br||acta@botanica.org.br|| f.a.r.santos@gmail.com |
_version_ |
1752126662990888960 |