@InProceedings{RibeiroPFSOFKSRA:2018:EfLaUs,
               author = "Ribeiro, Kelly and Pacheco, Felipe Siqueira and Ferreira, Willian 
                         Jos{\'e} and Sousa Neto, Eraclito Rodrigues de and Ometto, Jean 
                         Pierre Henry Balbaud and Forti, Maria Cristina and Krieger Filho, 
                         Guenther Carlos and Sobra, Anahi Chimini and Reis, Samara 
                         Ven{\^a}ncio dos and Alval{\'a}, Pl{\'{\i}}nio Carlos",
          affiliation = "{Instituto Nacional de Pesquisas Espaciais (INPE)} and {Instituto 
                         Nacional de Pesquisas Espaciais (INPE)} and {Instituto Nacional de 
                         Pesquisas Espaciais (INPE)} and {Instituto Nacional de Pesquisas 
                         Espaciais (INPE)} and {Instituto Nacional de Pesquisas Espaciais 
                         (INPE)} and {Instituto Nacional de Pesquisas Espaciais (INPE)} and 
                         {Universidade de S{\~a}o Paulo (USP)} and {Instituto Nacional de 
                         Pesquisas Espaciais (INPE)} and {Instituto Nacional de Pesquisas 
                         Espaciais (INPE)} and {Instituto Nacional de Pesquisas Espaciais 
                         (INPE)}",
                title = "Effect of land use and land cover on greenhouse gas emissions from 
                         peatlands in the Para{\'{\i}}ba Valley, Brazil",
                 year = "2018",
         organization = "AGU Fall Meeting",
             abstract = "Peatlands 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 Para{\'{\i}}ba region, 
                         S{\~a}o Paulo, Brazil. The sampling program was carried out in 
                         the lowlands of the Para{\'{\i}}ba 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.",
  conference-location = "Washington, D. C.",
      conference-year = "10-14 dec.",
             language = "en",
           targetfile = "ribeiro_effect.pdf",
        urlaccessdate = "20 abr. 2024"
}