Effects of food web structure and resource subsidies on the patterns and mechanisms of temporal coherence in a tropical coastal lagoon: an experimental mesocosm approach

Detalhes bibliográficos
Autor(a) principal: Carneiro,Luciana Silva
Data de Publicação: 2013
Outros Autores: Caliman,Adriano, Guariento,Rafael Dettogni, Rocha,Adriana de Melo, Quesado,Leticia Barbosa, Fonte,Ellen da Silva, Santangelo,Jayme Magalhães, Leal,João José Fonseca, Lopes,Paloma Marinho, Meirelles-Pereira,Frederico, Esteves,Francisco de Assis, Bozelli,Reinaldo Luiz
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=S2179-975X2013000300010
Resumo: AIM: The study of the patterns and mechanisms of temporal coherence of ecological variables among lakes has become an important area of limnology. However, no study to date has experimentally tested whether and how resource subsidies and food web configuration affect the patterns and mechanisms of temporal coherence of limnological variables. We conducted a field mesocosm experiment to test the following hypotheses: (i) nutrient enrichment would reduce the temporal coherence of system variables; (ii) fish predation would enhance the temporal coherence of system variables; and (iii) the strength of temporal coherence decreases from physical (water transparency), to chemical (dissolved oxygen concentration [DO]) to biological variables (total zooplankton biomass). METHODS: For 11 weeks, we manipulated fish presence and nutrient (N and P) concentration in a 2 × 2 factorial design in sixteen within-lake enclosures installed in a tropical coastal lagoon. Coherence was estimated by pair-to-pair Pearson's moment correlations of the temporal trajectories of each response variable among enclosures of the same treatment. RESULTS: Fish presence only enhanced the temporal coherence of zooplankton biomass, whereas contrary to our expectations, nutrient addition enhanced the temporal coherence of [DO]. The strength of the individual effects of fish and nutrients on temporal coherence was affected by variable identity, but this variation did not occur in a consistent pattern across variables. However, the interactive effects of fish and nutrients on the temporal coherence of the three variables monitored were not statistically significant. CONCLUSIONS: Our results indicate that local factors, such as fish presence and nutrient availability, may affect the temporal coherence of several system variables, but these effects are better predicted by the strength of direct interactions between the local factor and the variable than by the identity of the variable itself. We conclude that eutrophication and overfishing may alter the coupling of spatial and temporal dynamics of some ecosystem variables.
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spelling Effects of food web structure and resource subsidies on the patterns and mechanisms of temporal coherence in a tropical coastal lagoon: an experimental mesocosm approacheutrophicationtemporal synchronystabilityshallow lakesfishpredationAIM: The study of the patterns and mechanisms of temporal coherence of ecological variables among lakes has become an important area of limnology. However, no study to date has experimentally tested whether and how resource subsidies and food web configuration affect the patterns and mechanisms of temporal coherence of limnological variables. We conducted a field mesocosm experiment to test the following hypotheses: (i) nutrient enrichment would reduce the temporal coherence of system variables; (ii) fish predation would enhance the temporal coherence of system variables; and (iii) the strength of temporal coherence decreases from physical (water transparency), to chemical (dissolved oxygen concentration [DO]) to biological variables (total zooplankton biomass). METHODS: For 11 weeks, we manipulated fish presence and nutrient (N and P) concentration in a 2 × 2 factorial design in sixteen within-lake enclosures installed in a tropical coastal lagoon. Coherence was estimated by pair-to-pair Pearson's moment correlations of the temporal trajectories of each response variable among enclosures of the same treatment. RESULTS: Fish presence only enhanced the temporal coherence of zooplankton biomass, whereas contrary to our expectations, nutrient addition enhanced the temporal coherence of [DO]. The strength of the individual effects of fish and nutrients on temporal coherence was affected by variable identity, but this variation did not occur in a consistent pattern across variables. However, the interactive effects of fish and nutrients on the temporal coherence of the three variables monitored were not statistically significant. CONCLUSIONS: Our results indicate that local factors, such as fish presence and nutrient availability, may affect the temporal coherence of several system variables, but these effects are better predicted by the strength of direct interactions between the local factor and the variable than by the identity of the variable itself. We conclude that eutrophication and overfishing may alter the coupling of spatial and temporal dynamics of some ecosystem variables.Associação Brasileira de Limnologia2013-09-01info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersiontext/htmlhttp://old.scielo.br/scielo.php?script=sci_arttext&pid=S2179-975X2013000300010Acta Limnologica Brasiliensia v.25 n.3 2013reponame:Acta Limnologica Brasiliensia (Online)instname:Associação Brasileira de Limnologia (ABL)instacron:ABL10.1590/S2179-975X2013000300010info:eu-repo/semantics/openAccessCarneiro,Luciana SilvaCaliman,AdrianoGuariento,Rafael DettogniRocha,Adriana de MeloQuesado,Leticia BarbosaFonte,Ellen da SilvaSantangelo,Jayme MagalhãesLeal,João José FonsecaLopes,Paloma MarinhoMeirelles-Pereira,FredericoEsteves,Francisco de AssisBozelli,Reinaldo Luizeng2014-02-07T00:00:00Zoai:scielo:S2179-975X2013000300010Revistahttp://www.ablimno.org.br/publiActa.phphttps://old.scielo.br/oai/scielo-oai.php||actalb@rc.unesp.br2179-975X0102-6712opendoar:2014-02-07T00:00Acta Limnologica Brasiliensia (Online) - Associação Brasileira de Limnologia (ABL)false
dc.title.none.fl_str_mv Effects of food web structure and resource subsidies on the patterns and mechanisms of temporal coherence in a tropical coastal lagoon: an experimental mesocosm approach
title Effects of food web structure and resource subsidies on the patterns and mechanisms of temporal coherence in a tropical coastal lagoon: an experimental mesocosm approach
spellingShingle Effects of food web structure and resource subsidies on the patterns and mechanisms of temporal coherence in a tropical coastal lagoon: an experimental mesocosm approach
Carneiro,Luciana Silva
eutrophication
temporal synchrony
stability
shallow lakes
fish
predation
title_short Effects of food web structure and resource subsidies on the patterns and mechanisms of temporal coherence in a tropical coastal lagoon: an experimental mesocosm approach
title_full Effects of food web structure and resource subsidies on the patterns and mechanisms of temporal coherence in a tropical coastal lagoon: an experimental mesocosm approach
title_fullStr Effects of food web structure and resource subsidies on the patterns and mechanisms of temporal coherence in a tropical coastal lagoon: an experimental mesocosm approach
title_full_unstemmed Effects of food web structure and resource subsidies on the patterns and mechanisms of temporal coherence in a tropical coastal lagoon: an experimental mesocosm approach
title_sort Effects of food web structure and resource subsidies on the patterns and mechanisms of temporal coherence in a tropical coastal lagoon: an experimental mesocosm approach
author Carneiro,Luciana Silva
author_facet Carneiro,Luciana Silva
Caliman,Adriano
Guariento,Rafael Dettogni
Rocha,Adriana de Melo
Quesado,Leticia Barbosa
Fonte,Ellen da Silva
Santangelo,Jayme Magalhães
Leal,João José Fonseca
Lopes,Paloma Marinho
Meirelles-Pereira,Frederico
Esteves,Francisco de Assis
Bozelli,Reinaldo Luiz
author_role author
author2 Caliman,Adriano
Guariento,Rafael Dettogni
Rocha,Adriana de Melo
Quesado,Leticia Barbosa
Fonte,Ellen da Silva
Santangelo,Jayme Magalhães
Leal,João José Fonseca
Lopes,Paloma Marinho
Meirelles-Pereira,Frederico
Esteves,Francisco de Assis
Bozelli,Reinaldo Luiz
author2_role author
author
author
author
author
author
author
author
author
author
author
dc.contributor.author.fl_str_mv Carneiro,Luciana Silva
Caliman,Adriano
Guariento,Rafael Dettogni
Rocha,Adriana de Melo
Quesado,Leticia Barbosa
Fonte,Ellen da Silva
Santangelo,Jayme Magalhães
Leal,João José Fonseca
Lopes,Paloma Marinho
Meirelles-Pereira,Frederico
Esteves,Francisco de Assis
Bozelli,Reinaldo Luiz
dc.subject.por.fl_str_mv eutrophication
temporal synchrony
stability
shallow lakes
fish
predation
topic eutrophication
temporal synchrony
stability
shallow lakes
fish
predation
description AIM: The study of the patterns and mechanisms of temporal coherence of ecological variables among lakes has become an important area of limnology. However, no study to date has experimentally tested whether and how resource subsidies and food web configuration affect the patterns and mechanisms of temporal coherence of limnological variables. We conducted a field mesocosm experiment to test the following hypotheses: (i) nutrient enrichment would reduce the temporal coherence of system variables; (ii) fish predation would enhance the temporal coherence of system variables; and (iii) the strength of temporal coherence decreases from physical (water transparency), to chemical (dissolved oxygen concentration [DO]) to biological variables (total zooplankton biomass). METHODS: For 11 weeks, we manipulated fish presence and nutrient (N and P) concentration in a 2 × 2 factorial design in sixteen within-lake enclosures installed in a tropical coastal lagoon. Coherence was estimated by pair-to-pair Pearson's moment correlations of the temporal trajectories of each response variable among enclosures of the same treatment. RESULTS: Fish presence only enhanced the temporal coherence of zooplankton biomass, whereas contrary to our expectations, nutrient addition enhanced the temporal coherence of [DO]. The strength of the individual effects of fish and nutrients on temporal coherence was affected by variable identity, but this variation did not occur in a consistent pattern across variables. However, the interactive effects of fish and nutrients on the temporal coherence of the three variables monitored were not statistically significant. CONCLUSIONS: Our results indicate that local factors, such as fish presence and nutrient availability, may affect the temporal coherence of several system variables, but these effects are better predicted by the strength of direct interactions between the local factor and the variable than by the identity of the variable itself. We conclude that eutrophication and overfishing may alter the coupling of spatial and temporal dynamics of some ecosystem variables.
publishDate 2013
dc.date.none.fl_str_mv 2013-09-01
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=S2179-975X2013000300010
url http://old.scielo.br/scielo.php?script=sci_arttext&pid=S2179-975X2013000300010
dc.language.iso.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv 10.1590/S2179-975X2013000300010
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.3 2013
reponame:Acta Limnologica Brasiliensia (Online)
instname:Associação Brasileira de Limnologia (ABL)
instacron:ABL
instname_str Associação Brasileira de Limnologia (ABL)
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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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