Methane and carbon dioxide dynamics in the paraguay river floodplain (pantanal) in episodic anoxia events
Autor(a) principal: | |
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Data de Publicação: | 2016 |
Outros Autores: | , , , , , , , |
Tipo de documento: | Capítulo de livro |
Idioma: | eng |
Título da fonte: | Repositório Institucional da UNESP |
Texto Completo: | http://dx.doi.org/10.1007/698_2015_353 http://hdl.handle.net/11449/221036 |
Resumo: | Worldwide wetlands contribute to the global carbon cycle by emitting about a third of the global methane (CH4) emissions. However, CH4 and carbon dioxide (CO2) dynamics remain poorly understood in the largest tropical wetland on Earth, the Pantanal. In this chapter, we aim to characterize the CH4 and CO2 biogeochemistry in the floodplain of the Paraguay River, near Corumbá, during the course of annual anoxia phenomena locally known as dequada. The strong anoxia is associated to the flooding of terrestrial habitats that enhances respiration, dissolved oxygen (DO) consumption, and methanogenesis. The extremely low DO also leads to high fish mortality in the region. CH4 and CO2 concentration in surface waters and diffusive water–air fluxes were measured in the oxbow Tuiuiú Lake and in the Paraguay River main stem in order to identify temporal and spatial patterns. The whole dataset shows that, for instance, dissolved CH4 and diffusive CH4 fluxes increased dramatically during the dequada. In the study area, CH4 emissions can reach 9–85 mg CH4 m−2 h−1 during dequada climax. Riverine anoxic waters steadily penetrate the oxbow Tuiuiú Lake, indicating water inflow from the river main stem, whereas small reminiscent patches of oxbow waters not mixing with anoxic river waters may function as survival refuges to the aquatic wildlife. Clearly, the DO distribution during several dequadas in major rivers of the Pantanal highlights the importance of geomorphology on the biogeochemistry in the riverine floodplains of the Pantanal wetland. |
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Methane and carbon dioxide dynamics in the paraguay river floodplain (pantanal) in episodic anoxia eventsCarbon cycleDequadaFish mortalityFlood pulseWetlandWorldwide wetlands contribute to the global carbon cycle by emitting about a third of the global methane (CH4) emissions. However, CH4 and carbon dioxide (CO2) dynamics remain poorly understood in the largest tropical wetland on Earth, the Pantanal. In this chapter, we aim to characterize the CH4 and CO2 biogeochemistry in the floodplain of the Paraguay River, near Corumbá, during the course of annual anoxia phenomena locally known as dequada. The strong anoxia is associated to the flooding of terrestrial habitats that enhances respiration, dissolved oxygen (DO) consumption, and methanogenesis. The extremely low DO also leads to high fish mortality in the region. CH4 and CO2 concentration in surface waters and diffusive water–air fluxes were measured in the oxbow Tuiuiú Lake and in the Paraguay River main stem in order to identify temporal and spatial patterns. The whole dataset shows that, for instance, dissolved CH4 and diffusive CH4 fluxes increased dramatically during the dequada. In the study area, CH4 emissions can reach 9–85 mg CH4 m−2 h−1 during dequada climax. Riverine anoxic waters steadily penetrate the oxbow Tuiuiú Lake, indicating water inflow from the river main stem, whereas small reminiscent patches of oxbow waters not mixing with anoxic river waters may function as survival refuges to the aquatic wildlife. Clearly, the DO distribution during several dequadas in major rivers of the Pantanal highlights the importance of geomorphology on the biogeochemistry in the riverine floodplains of the Pantanal wetland.Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)Fundação de Apoio ao Desenvolvimento do Ensino, Ciência e Tecnologia do Estado de Mato Grosso do SulConselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)Laboratory of Biomass Conversion Embrapa PantanalGéosciences Environnement Toulouse (GET) Observatoire Midi Pyrénées Université de Toulouse CNRS IRD, 14 avenue E. BelinDepartment of Geosciences and Environment Paulista State UniversityDepartment of Geography Federal University of Mato Grosso do SulCenter for Nuclear Energy in Agriculture University of São PauloDepartment of Thematic Studies – Environmental Change Linköping UniversityDepartment of Geosciences and Environment Paulista State UniversityFAPESP: 2008/58089-9FAPESP: 2014/06889-2Fundação de Apoio ao Desenvolvimento do Ensino, Ciência e Tecnologia do Estado de Mato Grosso do Sul: 23/200.628/2012CNPq: 312386/2014-1CNPq: 447402/2014-5CNPq: 562441/2010-7Empresa Brasileira de Pesquisa Agropecuária (EMBRAPA)IRDUniversidade Estadual Paulista (UNESP)Federal University of Mato Grosso do SulUniversidade de São Paulo (USP)Linköping UniversityBergier, IvanSilva, Ana P. S.Monteiro, HernandesGuérin, FrédéricMacedo, Hudson A. [UNESP]Silva, AguinaldoKrusche, AlexSawakuchi, Henrique O.Bastviken, David2022-04-28T19:08:47Z2022-04-28T19:08:47Z2016-01-01info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/bookPart163-178http://dx.doi.org/10.1007/698_2015_353Handbook of Environmental Chemistry, v. 37, p. 163-178.1867-979Xhttp://hdl.handle.net/11449/22103610.1007/698_2015_3532-s2.0-85043532902Scopusreponame:Repositório Institucional da UNESPinstname:Universidade Estadual Paulista (UNESP)instacron:UNESPengHandbook of Environmental Chemistryinfo:eu-repo/semantics/openAccess2022-04-28T19:08:47Zoai:repositorio.unesp.br:11449/221036Repositório InstitucionalPUBhttp://repositorio.unesp.br/oai/requestopendoar:29462022-04-28T19:08:47Repositório Institucional da UNESP - Universidade Estadual Paulista (UNESP)false |
dc.title.none.fl_str_mv |
Methane and carbon dioxide dynamics in the paraguay river floodplain (pantanal) in episodic anoxia events |
title |
Methane and carbon dioxide dynamics in the paraguay river floodplain (pantanal) in episodic anoxia events |
spellingShingle |
Methane and carbon dioxide dynamics in the paraguay river floodplain (pantanal) in episodic anoxia events Bergier, Ivan Carbon cycle Dequada Fish mortality Flood pulse Wetland |
title_short |
Methane and carbon dioxide dynamics in the paraguay river floodplain (pantanal) in episodic anoxia events |
title_full |
Methane and carbon dioxide dynamics in the paraguay river floodplain (pantanal) in episodic anoxia events |
title_fullStr |
Methane and carbon dioxide dynamics in the paraguay river floodplain (pantanal) in episodic anoxia events |
title_full_unstemmed |
Methane and carbon dioxide dynamics in the paraguay river floodplain (pantanal) in episodic anoxia events |
title_sort |
Methane and carbon dioxide dynamics in the paraguay river floodplain (pantanal) in episodic anoxia events |
author |
Bergier, Ivan |
author_facet |
Bergier, Ivan Silva, Ana P. S. Monteiro, Hernandes Guérin, Frédéric Macedo, Hudson A. [UNESP] Silva, Aguinaldo Krusche, Alex Sawakuchi, Henrique O. Bastviken, David |
author_role |
author |
author2 |
Silva, Ana P. S. Monteiro, Hernandes Guérin, Frédéric Macedo, Hudson A. [UNESP] Silva, Aguinaldo Krusche, Alex Sawakuchi, Henrique O. Bastviken, David |
author2_role |
author author author author author author author author |
dc.contributor.none.fl_str_mv |
Empresa Brasileira de Pesquisa Agropecuária (EMBRAPA) IRD Universidade Estadual Paulista (UNESP) Federal University of Mato Grosso do Sul Universidade de São Paulo (USP) Linköping University |
dc.contributor.author.fl_str_mv |
Bergier, Ivan Silva, Ana P. S. Monteiro, Hernandes Guérin, Frédéric Macedo, Hudson A. [UNESP] Silva, Aguinaldo Krusche, Alex Sawakuchi, Henrique O. Bastviken, David |
dc.subject.por.fl_str_mv |
Carbon cycle Dequada Fish mortality Flood pulse Wetland |
topic |
Carbon cycle Dequada Fish mortality Flood pulse Wetland |
description |
Worldwide wetlands contribute to the global carbon cycle by emitting about a third of the global methane (CH4) emissions. However, CH4 and carbon dioxide (CO2) dynamics remain poorly understood in the largest tropical wetland on Earth, the Pantanal. In this chapter, we aim to characterize the CH4 and CO2 biogeochemistry in the floodplain of the Paraguay River, near Corumbá, during the course of annual anoxia phenomena locally known as dequada. The strong anoxia is associated to the flooding of terrestrial habitats that enhances respiration, dissolved oxygen (DO) consumption, and methanogenesis. The extremely low DO also leads to high fish mortality in the region. CH4 and CO2 concentration in surface waters and diffusive water–air fluxes were measured in the oxbow Tuiuiú Lake and in the Paraguay River main stem in order to identify temporal and spatial patterns. The whole dataset shows that, for instance, dissolved CH4 and diffusive CH4 fluxes increased dramatically during the dequada. In the study area, CH4 emissions can reach 9–85 mg CH4 m−2 h−1 during dequada climax. Riverine anoxic waters steadily penetrate the oxbow Tuiuiú Lake, indicating water inflow from the river main stem, whereas small reminiscent patches of oxbow waters not mixing with anoxic river waters may function as survival refuges to the aquatic wildlife. Clearly, the DO distribution during several dequadas in major rivers of the Pantanal highlights the importance of geomorphology on the biogeochemistry in the riverine floodplains of the Pantanal wetland. |
publishDate |
2016 |
dc.date.none.fl_str_mv |
2016-01-01 2022-04-28T19:08:47Z 2022-04-28T19:08:47Z |
dc.type.status.fl_str_mv |
info:eu-repo/semantics/publishedVersion |
dc.type.driver.fl_str_mv |
info:eu-repo/semantics/bookPart |
format |
bookPart |
status_str |
publishedVersion |
dc.identifier.uri.fl_str_mv |
http://dx.doi.org/10.1007/698_2015_353 Handbook of Environmental Chemistry, v. 37, p. 163-178. 1867-979X http://hdl.handle.net/11449/221036 10.1007/698_2015_353 2-s2.0-85043532902 |
url |
http://dx.doi.org/10.1007/698_2015_353 http://hdl.handle.net/11449/221036 |
identifier_str_mv |
Handbook of Environmental Chemistry, v. 37, p. 163-178. 1867-979X 10.1007/698_2015_353 2-s2.0-85043532902 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
Handbook of Environmental Chemistry |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
dc.format.none.fl_str_mv |
163-178 |
dc.source.none.fl_str_mv |
Scopus reponame:Repositório Institucional da UNESP instname:Universidade Estadual Paulista (UNESP) instacron:UNESP |
instname_str |
Universidade Estadual Paulista (UNESP) |
instacron_str |
UNESP |
institution |
UNESP |
reponame_str |
Repositório Institucional da UNESP |
collection |
Repositório Institucional da UNESP |
repository.name.fl_str_mv |
Repositório Institucional da UNESP - Universidade Estadual Paulista (UNESP) |
repository.mail.fl_str_mv |
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1799965202553241600 |