The effects of abiotic variables on detritus decomposition in Brazilian subtropical mangroves

Detalhes bibliográficos
Autor(a) principal: Rezende,Renan de Souza
Data de Publicação: 2013
Outros Autores: Pinto,Marcelo de Oliveira, Gonçalves Jr.,José Francisco, Petrucio,Mauricio Mello
Tipo de documento: Artigo
Idioma: eng
Título da fonte: Acta Limnologica Brasiliensia (Online)
Texto Completo: http://old.scielo.br/scielo.php?script=sci_arttext&pid=S2179-975X2013000200007
Resumo: AIM: The objective of this study was to determine the rate of decomposition of two dominant arboreal species (Rhizophora mangle and Avicennia schaueriana) in two Brazilian subtropical mangroves (Ratones and Itacorubi) and their relationship with abiotic factors during two periods of the year (winter and summer). METHODS: Senescent leaves (4 ± 0.1 g dry weight) were placed into litter bags (20 × 25 cm with 1 cm mesh size) and submersed in mangrove forests during a winter and a summer sampling period. Replicates (n = 4) of each detritus sample were obtained from the mangroves after 7, 15, 30, 60, 90 and 120 days of incubation during both time periods. During each period, in situ measurements were taken to obtain the temperature, electrical conductivity, pH, and dissolved oxygen in the water column. RESULTS: The species R. mangle and A. schaueriana exhibited slow rates of decomposition at Itacorubi and intermediate rates at Ratones during the winter, while quick rates were observed at both sites during the summer; this result suggested that water temperature is an influential factor. There was no difference in the loss of mass between the sites during the winter, but in the summer, the highest values were observed for R. mangle in Ratones site. The highest summer temperatures were negatively associated with mass loss, suggesting that the temperature is an influential factor. During the winter, remaining mass was associated negatively with electrical conductivity, possibly because of a greater resource available to decomposing communities, and it was also positively associated with oxygen, revealing a pattern opposite to that observed in the literature. CONCLUSIONS: Our results showed that decomposition accelerated with higher temperatures and that electrical conductivity decelerated with increased dissolved oxygen, confirming the effects of abiotic factors on both detritus decomposition and mangrove functioning.
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spelling The effects of abiotic variables on detritus decomposition in Brazilian subtropical mangrovesleaf breakdownRhizophora mangleAvicennia schauerianasubtropical coastal regiontemperatureselectrical conductivitydissolved oxygenAIM: The objective of this study was to determine the rate of decomposition of two dominant arboreal species (Rhizophora mangle and Avicennia schaueriana) in two Brazilian subtropical mangroves (Ratones and Itacorubi) and their relationship with abiotic factors during two periods of the year (winter and summer). METHODS: Senescent leaves (4 ± 0.1 g dry weight) were placed into litter bags (20 × 25 cm with 1 cm mesh size) and submersed in mangrove forests during a winter and a summer sampling period. Replicates (n = 4) of each detritus sample were obtained from the mangroves after 7, 15, 30, 60, 90 and 120 days of incubation during both time periods. During each period, in situ measurements were taken to obtain the temperature, electrical conductivity, pH, and dissolved oxygen in the water column. RESULTS: The species R. mangle and A. schaueriana exhibited slow rates of decomposition at Itacorubi and intermediate rates at Ratones during the winter, while quick rates were observed at both sites during the summer; this result suggested that water temperature is an influential factor. There was no difference in the loss of mass between the sites during the winter, but in the summer, the highest values were observed for R. mangle in Ratones site. The highest summer temperatures were negatively associated with mass loss, suggesting that the temperature is an influential factor. During the winter, remaining mass was associated negatively with electrical conductivity, possibly because of a greater resource available to decomposing communities, and it was also positively associated with oxygen, revealing a pattern opposite to that observed in the literature. CONCLUSIONS: Our results showed that decomposition accelerated with higher temperatures and that electrical conductivity decelerated with increased dissolved oxygen, confirming the effects of abiotic factors on both detritus decomposition and mangrove functioning.Associação Brasileira de Limnologia2013-06-01info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersiontext/htmlhttp://old.scielo.br/scielo.php?script=sci_arttext&pid=S2179-975X2013000200007Acta Limnologica Brasiliensia v.25 n.2 2013reponame:Acta Limnologica Brasiliensia (Online)instname:Associação Brasileira de Limnologia (ABL)instacron:ABL10.1590/S2179-975X2013000200007info:eu-repo/semantics/openAccessRezende,Renan de SouzaPinto,Marcelo de OliveiraGonçalves Jr.,José FranciscoPetrucio,Mauricio Melloeng2013-11-08T00:00:00Zoai:scielo:S2179-975X2013000200007Revistahttp://www.ablimno.org.br/publiActa.phphttps://old.scielo.br/oai/scielo-oai.php||actalb@rc.unesp.br2179-975X0102-6712opendoar:2013-11-08T00:00Acta Limnologica Brasiliensia (Online) - Associação Brasileira de Limnologia (ABL)false
dc.title.none.fl_str_mv The effects of abiotic variables on detritus decomposition in Brazilian subtropical mangroves
title The effects of abiotic variables on detritus decomposition in Brazilian subtropical mangroves
spellingShingle The effects of abiotic variables on detritus decomposition in Brazilian subtropical mangroves
Rezende,Renan de Souza
leaf breakdown
Rhizophora mangle
Avicennia schaueriana
subtropical coastal region
temperatures
electrical conductivity
dissolved oxygen
title_short The effects of abiotic variables on detritus decomposition in Brazilian subtropical mangroves
title_full The effects of abiotic variables on detritus decomposition in Brazilian subtropical mangroves
title_fullStr The effects of abiotic variables on detritus decomposition in Brazilian subtropical mangroves
title_full_unstemmed The effects of abiotic variables on detritus decomposition in Brazilian subtropical mangroves
title_sort The effects of abiotic variables on detritus decomposition in Brazilian subtropical mangroves
author Rezende,Renan de Souza
author_facet Rezende,Renan de Souza
Pinto,Marcelo de Oliveira
Gonçalves Jr.,José Francisco
Petrucio,Mauricio Mello
author_role author
author2 Pinto,Marcelo de Oliveira
Gonçalves Jr.,José Francisco
Petrucio,Mauricio Mello
author2_role author
author
author
dc.contributor.author.fl_str_mv Rezende,Renan de Souza
Pinto,Marcelo de Oliveira
Gonçalves Jr.,José Francisco
Petrucio,Mauricio Mello
dc.subject.por.fl_str_mv leaf breakdown
Rhizophora mangle
Avicennia schaueriana
subtropical coastal region
temperatures
electrical conductivity
dissolved oxygen
topic leaf breakdown
Rhizophora mangle
Avicennia schaueriana
subtropical coastal region
temperatures
electrical conductivity
dissolved oxygen
description AIM: The objective of this study was to determine the rate of decomposition of two dominant arboreal species (Rhizophora mangle and Avicennia schaueriana) in two Brazilian subtropical mangroves (Ratones and Itacorubi) and their relationship with abiotic factors during two periods of the year (winter and summer). METHODS: Senescent leaves (4 ± 0.1 g dry weight) were placed into litter bags (20 × 25 cm with 1 cm mesh size) and submersed in mangrove forests during a winter and a summer sampling period. Replicates (n = 4) of each detritus sample were obtained from the mangroves after 7, 15, 30, 60, 90 and 120 days of incubation during both time periods. During each period, in situ measurements were taken to obtain the temperature, electrical conductivity, pH, and dissolved oxygen in the water column. RESULTS: The species R. mangle and A. schaueriana exhibited slow rates of decomposition at Itacorubi and intermediate rates at Ratones during the winter, while quick rates were observed at both sites during the summer; this result suggested that water temperature is an influential factor. There was no difference in the loss of mass between the sites during the winter, but in the summer, the highest values were observed for R. mangle in Ratones site. The highest summer temperatures were negatively associated with mass loss, suggesting that the temperature is an influential factor. During the winter, remaining mass was associated negatively with electrical conductivity, possibly because of a greater resource available to decomposing communities, and it was also positively associated with oxygen, revealing a pattern opposite to that observed in the literature. CONCLUSIONS: Our results showed that decomposition accelerated with higher temperatures and that electrical conductivity decelerated with increased dissolved oxygen, confirming the effects of abiotic factors on both detritus decomposition and mangrove functioning.
publishDate 2013
dc.date.none.fl_str_mv 2013-06-01
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=S2179-975X2013000200007
url http://old.scielo.br/scielo.php?script=sci_arttext&pid=S2179-975X2013000200007
dc.language.iso.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv 10.1590/S2179-975X2013000200007
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 Associação Brasileira de Limnologia
publisher.none.fl_str_mv Associação Brasileira de Limnologia
dc.source.none.fl_str_mv Acta Limnologica Brasiliensia v.25 n.2 2013
reponame:Acta Limnologica Brasiliensia (Online)
instname:Associação Brasileira de Limnologia (ABL)
instacron:ABL
instname_str Associação Brasileira de Limnologia (ABL)
instacron_str ABL
institution ABL
reponame_str Acta Limnologica Brasiliensia (Online)
collection Acta Limnologica Brasiliensia (Online)
repository.name.fl_str_mv Acta Limnologica Brasiliensia (Online) - Associação Brasileira de Limnologia (ABL)
repository.mail.fl_str_mv ||actalb@rc.unesp.br
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