Eight years of continuous carbon fluxes measurements in a portuguese eucalypt stand under two main events: drought and felling

Detalhes bibliográficos
Autor(a) principal: Rodrigues, Abel
Data de Publicação: 2011
Outros Autores: Pita, Gabriel, Mateus, João, Kurz-Besson, Cathy, Casquilho, Miguel, Cerasoli, Sofia, Gomes, Alberto, Pereira, João Santos
Tipo de documento: Artigo
Idioma: eng
Título da fonte: Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)
Texto Completo: http://hdl.handle.net/10400.5/4271
Resumo: Available at ScienceDirect
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spelling Eight years of continuous carbon fluxes measurements in a portuguese eucalypt stand under two main events: drought and fellingEddy covariancecarbontree fellingwater stressdoughtGEEsAvailable at ScienceDirectThis paper reports on results from eddy covariance measurements of carbon uptake and evapotranspiration in the eucalypt site of Espirra in Southern Portugal (38◦38 N, 8◦36 W). This site was included in the “Carboeurope” European network and is part of a 300 ha eucalypt forest, with about 1100 trees ha−1, intensively managed as a coppice for pulp production and characterized by a 12-month annual growing period. The climate is of Mediterranean type with a long term (1961–1990) annual average precipitation of 709mm and an annual average air temperature of 15.90 ◦C. During the measurement period (2002–2009) two main events took place, which changed the annual sink pattern of the forest: a drought period of two years (2004–2005) and a tree felling (October and November 2006). We analyzed the daily, seasonal and inter-annual variation of carbon uptake and evapotranspiration, and their relationships with the events and the variability of the main meteorological variables. Before the felling, annual net ecosystem exchange (NEE) increased from −865.56gCm−2 in 2002 to −356.64gCm−2 in 2005 together with a deep decrease in rainfall from 748mm in 2002 to 378.58mm and 396.64mm in 2004 and 2005, respectively. For the same period, seasonal patterns of carbon uptake showed maximum values in April and decreased in July–August. The eucalypt stand recovered its carbon sink ability since June 2007 and had a NEE of −209.01gCm−2 in 2009. After the felling, the carbon uptake occurred from mid-February to mid-October, following an almost opposite pattern than that of the trees in the term of their productive cycle. A quantitative approach using generalized estimating equations (GEEs) was made for the period before the felling to relate monthly NEE and GPP with accumulated photosynthetic active radiation, water vapour pressure and precipitation. In conclusion, our study showed the relevant effects of water stress and anthropogenic interventions in the daily, seasonal and annual patterns of carbon uptake, under a context of good environmental conditions for carbon sequestration.ElsevierRepositório da Universidade de LisboaRodrigues, AbelPita, GabrielMateus, JoãoKurz-Besson, CathyCasquilho, MiguelCerasoli, SofiaGomes, AlbertoPereira, João Santos2012-04-24T13:45:36Z20112011-01-01T00:00:00Zinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articleapplication/pdfhttp://hdl.handle.net/10400.5/4271eng"Agricultural and Forest Meteorology". ISSN 0168-1923. 151 (2011) 493-5070168-1923info:eu-repo/semantics/openAccessreponame:Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)instname:Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informaçãoinstacron:RCAAP2023-03-06T14:35:16Zoai:www.repository.utl.pt:10400.5/4271Portal AgregadorONGhttps://www.rcaap.pt/oai/openaireopendoar:71602024-03-19T16:51:58.145310Repositório 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 Eight years of continuous carbon fluxes measurements in a portuguese eucalypt stand under two main events: drought and felling
title Eight years of continuous carbon fluxes measurements in a portuguese eucalypt stand under two main events: drought and felling
spellingShingle Eight years of continuous carbon fluxes measurements in a portuguese eucalypt stand under two main events: drought and felling
Rodrigues, Abel
Eddy covariance
carbon
tree felling
water stress
dought
GEEs
title_short Eight years of continuous carbon fluxes measurements in a portuguese eucalypt stand under two main events: drought and felling
title_full Eight years of continuous carbon fluxes measurements in a portuguese eucalypt stand under two main events: drought and felling
title_fullStr Eight years of continuous carbon fluxes measurements in a portuguese eucalypt stand under two main events: drought and felling
title_full_unstemmed Eight years of continuous carbon fluxes measurements in a portuguese eucalypt stand under two main events: drought and felling
title_sort Eight years of continuous carbon fluxes measurements in a portuguese eucalypt stand under two main events: drought and felling
author Rodrigues, Abel
author_facet Rodrigues, Abel
Pita, Gabriel
Mateus, João
Kurz-Besson, Cathy
Casquilho, Miguel
Cerasoli, Sofia
Gomes, Alberto
Pereira, João Santos
author_role author
author2 Pita, Gabriel
Mateus, João
Kurz-Besson, Cathy
Casquilho, Miguel
Cerasoli, Sofia
Gomes, Alberto
Pereira, João Santos
author2_role author
author
author
author
author
author
author
dc.contributor.none.fl_str_mv Repositório da Universidade de Lisboa
dc.contributor.author.fl_str_mv Rodrigues, Abel
Pita, Gabriel
Mateus, João
Kurz-Besson, Cathy
Casquilho, Miguel
Cerasoli, Sofia
Gomes, Alberto
Pereira, João Santos
dc.subject.por.fl_str_mv Eddy covariance
carbon
tree felling
water stress
dought
GEEs
topic Eddy covariance
carbon
tree felling
water stress
dought
GEEs
description Available at ScienceDirect
publishDate 2011
dc.date.none.fl_str_mv 2011
2011-01-01T00:00:00Z
2012-04-24T13:45:36Z
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/10400.5/4271
url http://hdl.handle.net/10400.5/4271
dc.language.iso.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv "Agricultural and Forest Meteorology". ISSN 0168-1923. 151 (2011) 493-507
0168-1923
dc.rights.driver.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
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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