@Article{WagnerRosStaBonHer:2013:StCoSa,
               author = "Wagner, F. and Rossi, V and Stahl, C. and Bonal, D. and Herault, 
                         B.",
          affiliation = "{Instituto Nacional de Pesquisas Espaciais (INPE)} and irad, Biens 
                         \& Serv Ecosyst Forestiers Trop UR105, Montpellier, France; Univ 
                         Yaounde, Modelisat Math \& Informat Syst Complexes UMI209, 
                         Yaounde, Cameroon and CIRAD, UMR Syst Elevage Milieux 
                         Mediterraneens \& Trop, Kourou, French Guiana and INRA, UMR EEF 
                         1137, F-54280 Champenoux, France and CIRAD, UMR Ecol Forets 
                         Guyane, Kourou, French Guiana",
                title = "Asynchronism in leaf and wood production in tropical forests: a 
                         study combining satellite and ground-based measurements",
              journal = "Biogeosciences",
                 year = "2013",
               volume = "10",
               number = "1",
                pages = "7307–7321",
             keywords = "Amazon rain-forests, carbon-dioxide emissions, long-term growth, 
                         vegetation indexes, french-guiana, dry season, water availability, 
                         deciduous forest, climate-change, global change.",
             abstract = "The fixation of carbon in tropical forests mainly occurs through 
                         the production of wood and leaves, both being the principal 
                         components of net primary production. Currently field and 
                         satellite observations are independently used to describe the 
                         forest carbon cycle, but the link between satellite-derived forest 
                         phenology and field-derived forest productivity remains opaque. We 
                         used a unique combination of a MODIS enhanced vegetation index 
                         (EVI) dataset, a wood production model based on climate data and 
                         direct litterfall observations at an intra-annual timescale in 
                         order to question the synchronism of leaf and wood production in 
                         tropical forests. Even though leaf and wood biomass fluxes had the 
                         same range (respectively 2.4 +/- 1.4 and 2.2 +/- 0.4 Mg C ha(-1) 
                         yr(-1)), they occurred separately in time. EVI increased with leaf 
                         renewal at the beginning of the dry season, when solar irradiance 
                         was at its maximum. At this time, wood production stopped. At the 
                         onset of the rainy season, when new leaves were fully mature and 
                         water available again, wood production quickly increased to reach 
                         its maximum in less than a month, reflecting a change in carbon 
                         allocation from short-lived pools (leaves) to long-lived pools 
                         (wood). The time lag between peaks of EVI and wood production (109 
                         days) revealed a substantial decoupling between the leaf renewal 
                         assumed to be driven by irradiance and the water-driven wood 
                         production. Our work is a first attempt to link EVI data, wood 
                         production and leaf phenology at a seasonal timescale in a 
                         tropical evergreen rainforest and pave the way to develop more 
                         sophisticated global carbon cycle models in tropical forests.",
                  doi = "10.5194/bg-10-7307",
                  url = "http://dx.doi.org/10.5194/bg-10-7307",
                 issn = "1726-4170",
             language = "en",
           targetfile = "bg-10-7307-2013.pdf",
        urlaccessdate = "18 maio 2024"
}