Tipo da ReferênciaConference Proceedings
Chave SecundáriaINPE--PRE/
Código do Detentorisadg {BR SPINPE} ibi 8JMKD3MGPCW/3DT298S
Chave de CitaçãoRibeiroPFSOFKSRA:2018:EfLaUs
Autor 1 Ribeiro, Kelly
 2 Pacheco, Felipe Siqueira
 3 Ferreira, Willian José
 4 Sousa Neto, Eraclito Rodrigues de
 5 Ometto, Jean Pierre Henry Balbaud
 6 Forti, Maria Cristina
 7 Krieger Filho, Guenther Carlos
 8 Sobra, Anahi Chimini
 9 Reis, Samara Venâncio dos
10 Alvalá, Plínio Carlos
Identificador de Curriculo 1
Afiliação 1 Instituto Nacional de Pesquisas Espaciais (INPE)
 2 Instituto Nacional de Pesquisas Espaciais (INPE)
 3 Instituto Nacional de Pesquisas Espaciais (INPE)
 4 Instituto Nacional de Pesquisas Espaciais (INPE)
 5 Instituto Nacional de Pesquisas Espaciais (INPE)
 6 Instituto Nacional de Pesquisas Espaciais (INPE)
 7 Universidade de São Paulo (USP)
 8 Instituto Nacional de Pesquisas Espaciais (INPE)
 9 Instituto Nacional de Pesquisas Espaciais (INPE)
10 Instituto Nacional de Pesquisas Espaciais (INPE)
Endereço de e-Mail do Autor 1 kelly.ribeiro@inpe.br
 2 felipe.pacheco@inpe.br
 3 willian.ferreira@inpe.br
 4 eraclito.neto@inpe.br
 5 jean.ometto@inpe.br
 8 anahi.sobral@inpe.br
 9 samara.reis@inpe.br
10 plinio.alvala@inpe.br
TítuloEffect of land use and land cover on greenhouse gas emissions from peatlands in the Paraíba Valley, Brazil
Nome do EventoAGU Fall Meeting
Data10-14 dec.
Localização do EventoWashington, D. C.
ResumoPeatlands cover around 570 million hectares worldwide and although most are located in boreal environments, tropical peatlands cover 170 million hectares and store about 860 Gt of carbon. Peat soils store a large amount of carbon and have acted as sinks of atmospheric CO2 for thousands of years but can also act as major sources of GHG emissions into the atmosphere when impacted by anthropogenic activities such as drainage, deforestation, forest fires, and changes from native to agricultural and livestock systems. These changes, besides disturbing the functions of this ecosystem, affect the dynamics of CO2 and CH4 flows. Therefore, the objective of this study is to evaluate the effect of land use change and land cover (LULC) on the dynamics of carbon emissions in tropical peatlands in the Vale do Paraíba region, São Paulo, Brazil. The sampling program was carried out in the lowlands of the Paraíba do Sul River, over different land cover: pastureland, native forest and irrigated rice crop. We used the static chamber technique to estimate GHG fluxes during two seasonal periods (wet season of 2017 and dry season 2018). Our results show that the highest CO2 (g CO2 m-2 yr-1) fluxes were observed in the dry season in pastureland (3,210), followed by native forest (2,174) and irrigated rice crop (2,074). The higher values in the dry season was regulated mainly by peat moisture, organic matter content and groundwater level. The CH4 fluxes (gCH4 m-2 yr-1) were mainly dependent on the moisture, temperature of the peat and groundwater level. The CH4 fluxes were negative (uptake) for pastureland (-5.2) and native forest (-3.1) and positive (emission) for irrigated rice crop (3.1). In the rainy season, methane fluxes were similar for the three land covers, with emissions of 4.0, 4.2 and 3.1 gCH4 m-2 yr-1 for native forest, pastureland and irrigated rice crop, respectively. These results suggest an increasing trend of CO2 emissions in situations of higher temperature and deeper groundwater table, mainly driven by the drainage and deforestation of peatlands in the region. On the other hand, long-term drought conditions may promote methanotrophic activities and consumption of CH4, decreasing CH4 emissions. Thus, the role of the peatlands as sink or source of GHG to the atmosphere will depend mainly on the dynamics of the LULC changes and land management.
Tipo SecundárioPRE CI
Última Atualização dos Metadados2019: urlib.net/www/2017/ administrator {D 2018}
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e-Mail (login)simone
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Grupo de Leitoresadministrator
Acervo Hospedeirourlib.net/www/2017/
Tipo do ConteudoExternal Contribution
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Histórico2018-12-03 14:22:59 :: simone -> administrator ::
2019-01-04 16:57:14 :: administrator -> simone :: 2018
2019-01-04 17:17:45 :: simone -> administrator :: 2018
2019-01-14 17:06:39 :: administrator -> simone :: 2018
Campos Vaziosaccessionnumber archivingpolicy archivist booktitle callnumber copyholder copyright creatorhistory descriptionlevel dissemination doi e-mailaddress edition editor format isbn issn keywords label lineage mark mirrorrepository nextedition notes numberoffiles numberofvolumes orcid organization pages parameterlist parentrepositories previousedition previouslowerunit progress project publisher publisheraddress readpermission rightsholder secondarydate secondarymark serieseditor session shorttitle size sponsor subject targetfile tertiarymark tertiarytype type url versiontype volume
Data de Acesso22 nov. 2019