@InProceedings{BatistaNelsPere:1995:RoSeGr,
               author = "Batista, Getulio Teixeira and Nelson, Bruce Walker and Pereira, J. 
                         L. G.",
                title = "Role of secondary growth forest in CO2 absorption in Eastern 
                         Amazonia",
                 year = "1995",
                pages = "83",
         organization = "International Symposium on Environmental Biogeochemestry - 
                         Biophere and Atmospheric Change, 12.",
             keywords = "ESTUDOS INTEGRADOS DO MEIO AMBIENTE.",
             abstract = "Land use and land cover change has a major impact on the global 
                         carbon cycle and consequently on climate change, especially when 
                         it involves forest conversion into agricultural use or abandonment 
                         after cultivation. Biomass burning and decomposition release CO2 
                         to the atmosphere and forest regrowth absorbs CO2 through 
                         photosynthesis. The total amount of carbon absorbed by secondary 
                         growth forest is currently unknown. This paper presents inedited 
                         data on biomass estimation from two sites of secondary growth 
                         forests located nearby Maraba, Para State (Eastern Amazonia), 
                         based on a combination of forest inventories, allometric equations 
                         and destructive biomass sampling. In addition, top soil root 
                         biomass and leaf area index (LAI)of the two classes (5 years and 9 
                         years old)of secondary growth forests were estimated. Sampling 
                         sites were located using Landsat TM imagery. The 5 years old 
                         secondary growth forest was dominated by Cecropia spp. (57), 
                         Aparisthmium cordatum (11), and Inga spp. (6). It had a basal area 
                         estimated in 17.1 m2/ha and a total above ground biomass of 77.0 
                         Mg/ha (dry weight)with a carbon accumulation rate of 7.5 
                         Mg/ha/year. The average LAI was 4.51. The 9 years old secondary 
                         growth forest was dominated by Cecropia spp. (35), Siparauna 
                         guianensis (7), and Pourouma spp. (6). It had a basal area 
                         estimated in 21.7 m2/ha and a total above ground biomass of 112.0 
                         Mg/ha, with a carbon accumulation rate of 6 Mg/ha/year. The 
                         average LAI was 4.81. The multitemporal satellite data was 
                         essential to accurately determine the age and former use of the 
                         selected sites. This analysis revealed that the two selected sites 
                         represents the highest rates of carbon fixation due to regrowth, 
                         because both sites were cut, burned once and abandoned. The 1993 
                         land use map of the studied region obtained from this experiment 
                         indicates that 68 of the area was primary forest, 7 was secondary 
                         growth forest, 24 was pasture and 1 was water and constructions. 
                         Therefore, from the total area deforested about 23 was abandoned 
                         and was covered by secondary growth forest. In addition to biomass 
                         estimation, 28 trees were cut, separated in components, such as 
                         leaf, branches, and bole, weighted, and dried up to constant 
                         weight. This allowed to verify of the adequacy of the available 
                         allometric equations.",
  conference-location = "Rio de Janeiro",
      conference-year = "3-8 Sept. 1995",
                label = "7799",
           targetfile = "INPE 6448.pdf",
        urlaccessdate = "08 maio 2024"
}