Potential effects of mechanically removing macrophytes on the phytoplankton community of a subtropical reservoir

Detalhes bibliográficos
Autor(a) principal: Wojciechowski,Juliana
Data de Publicação: 2018
Outros Autores: Burda,Tamires Marcela, Scheer,Mauricio Bergamini, Costa,Elaine Aparecida Dias da, Fernandes,Luciano Felício
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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spelling 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
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