In-situ soil greenhouse gas fluxes under different cryptogamic covers in maritime Antarctica

Detalhes bibliográficos
Autor(a) principal: Durán, J.
Data de Publicação: 2021
Outros Autores: Rodriguez, A., Fangueiro, David, De los Rios, A.
Tipo de documento: Artigo
Idioma: eng
Título da fonte: Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)
Texto Completo: http://hdl.handle.net/10400.5/21993
Resumo: Short Communication
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spelling In-situ soil greenhouse gas fluxes under different cryptogamic covers in maritime Antarcticanitrous oxidemethanecarbon dioxidecryptogamstrace gasespolar areasShort CommunicationSoils can influence climate by sequestering or emitting greenhouse gases (GHG) such as carbon dioxide (CO2), methane (CH4), and nitrous oxide (N2O). We are far from understanding the direct influence of cryptogamic covers on soil GHG fluxes, particularly in areas free of potential anthropogenic confounding factors. We assessed the role ofwell-developed cryptogamic covers in soil attributes, aswell as in the in-situ exchange of GHG between Antarctic soils and the atmosphere during the austral summer.We found lower values of soil organicmatter, total organic carbon, and total nitrogen in bare areas than in soils covered by mosses and, particularly, lichens. These differences, together with concomitant decreases and increases in soil temperature and moisture, respectively, resulted in increases in in-situ CO2 emission (i.e. ecosystem respiration) and decreases in CH4 uptake but no significant changes inN2O fluxes.We found consistent linear positive and negative relationships between soil attributes (i.e. soil organic matter, total organic carbon and total nitrogen) and CO2 emissions and CH4 uptake, respectively, and polynomial relationships between these soil attributes and net N2O fluxes. Our results indicate that any increase in the area occupied by cryptogams in terrestrial Antarctic ecosystems (due to increased growing season and increasingly warming conditions) will likely result in parallel increases in soil fertility aswell as in an enhanced capacity to emit CO2 and a decreased capacity to uptake CH4. Suchchanges,unless offset by parallel C uptake processes, would represent a paradigmatic example of a positive climate change feedback. Further, we show that the fate of these terrestrial ecosystems under future climate scenarios, as well as their capacity to exchange GHG with the atmosphere might depend on the relative ability of different aboveground cryptogams to thrive under the new conditionsElsevierRepositório da Universidade de LisboaDurán, J.Rodriguez, A.Fangueiro, DavidDe los Rios, A.2021-09-24T12:45:34Z20212021-01-01T00:00:00Zinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articleapplication/pdfhttp://hdl.handle.net/10400.5/21993engScience of the Total Environment 770 (2021) 144557https://doi.org/10.1016/j.scitotenv.2020.144557info:eu-repo/semantics/embargoedAccessreponame:Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)instname:Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informaçãoinstacron:RCAAP2023-03-06T14:51:33Zoai:www.repository.utl.pt:10400.5/21993Portal AgregadorONGhttps://www.rcaap.pt/oai/openaireopendoar:71602024-03-19T17:06:30.759213Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) - Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informaçãofalse
dc.title.none.fl_str_mv In-situ soil greenhouse gas fluxes under different cryptogamic covers in maritime Antarctica
title In-situ soil greenhouse gas fluxes under different cryptogamic covers in maritime Antarctica
spellingShingle In-situ soil greenhouse gas fluxes under different cryptogamic covers in maritime Antarctica
Durán, J.
nitrous oxide
methane
carbon dioxide
cryptogams
trace gases
polar areas
title_short In-situ soil greenhouse gas fluxes under different cryptogamic covers in maritime Antarctica
title_full In-situ soil greenhouse gas fluxes under different cryptogamic covers in maritime Antarctica
title_fullStr In-situ soil greenhouse gas fluxes under different cryptogamic covers in maritime Antarctica
title_full_unstemmed In-situ soil greenhouse gas fluxes under different cryptogamic covers in maritime Antarctica
title_sort In-situ soil greenhouse gas fluxes under different cryptogamic covers in maritime Antarctica
author Durán, J.
author_facet Durán, J.
Rodriguez, A.
Fangueiro, David
De los Rios, A.
author_role author
author2 Rodriguez, A.
Fangueiro, David
De los Rios, A.
author2_role author
author
author
dc.contributor.none.fl_str_mv Repositório da Universidade de Lisboa
dc.contributor.author.fl_str_mv Durán, J.
Rodriguez, A.
Fangueiro, David
De los Rios, A.
dc.subject.por.fl_str_mv nitrous oxide
methane
carbon dioxide
cryptogams
trace gases
polar areas
topic nitrous oxide
methane
carbon dioxide
cryptogams
trace gases
polar areas
description Short Communication
publishDate 2021
dc.date.none.fl_str_mv 2021-09-24T12:45:34Z
2021
2021-01-01T00:00:00Z
dc.type.status.fl_str_mv info:eu-repo/semantics/publishedVersion
dc.type.driver.fl_str_mv info:eu-repo/semantics/article
format article
status_str publishedVersion
dc.identifier.uri.fl_str_mv http://hdl.handle.net/10400.5/21993
url http://hdl.handle.net/10400.5/21993
dc.language.iso.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv Science of the Total Environment 770 (2021) 144557
https://doi.org/10.1016/j.scitotenv.2020.144557
dc.rights.driver.fl_str_mv info:eu-repo/semantics/embargoedAccess
eu_rights_str_mv embargoedAccess
dc.format.none.fl_str_mv application/pdf
dc.publisher.none.fl_str_mv Elsevier
publisher.none.fl_str_mv Elsevier
dc.source.none.fl_str_mv reponame:Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)
instname:Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação
instacron:RCAAP
instname_str Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação
instacron_str RCAAP
institution RCAAP
reponame_str Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)
collection Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)
repository.name.fl_str_mv Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) - Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação
repository.mail.fl_str_mv
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