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BIOMASS

Here is the table of the avorementioned equations and methods
 


 
 

Results

Total aboveground biomass

The mean TAGB for the 20 forest sites was 341 Mg ha-1 and ranged from 287 to 534 Mg ha-1 (Table 1). Mean TAGB of open forest (n=8) was 313 Mg ha-1 and ranged from 288 to 346 Mg ha-1. For dense forests (n=7),
TAGB ranged from 298 to 534 Mg ha-1, with a mean of 377 Mg ha-1. TAGB differed between open and dense forests at the P=0.11 level of probability. For ecotone forests (n=4), TAGB ranged from 298 to 422 Mg ha-1
and averaged 350 Mg ha-1.

Trees 10 cm dbh composed a mean of 78% of the TAGB for all plots combined. Biomass of trees 10 cm dbh differed between open and dense forests at the P=0.13 level of probability, averaging 238±8 and
307±33 Mg ha-1 for the two forest types, respectively. Mean biomass for all trees <50 cm dbh was similar in all three forest types
 

 


 
 

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References:
Brown, J.K., 1974. Handbook for Inventorying Downed Woody Material. USDA Forest Service, Ogden, UT, 25 pp.
Brown, S., 1997. Estimating Biomass and Biomass Change of Tropical Forests: A Primer. Forestry Paper 134, FAO, Rome.
Brown, S. and Lugo, A.E., 1984. Biomass of tropical forests: a new estimate based on forest volumes. Science 223, pp. 1290¯1293. Abstract-GEOBASE
Brown, S., Lugo, A.E., 1990. Biomass estimates for Brazil's Amazonian moist forests. In: Forest'90: Annals of the First International Symposium on Environmental Studies on Tropical Rain Forests, Manaus, Brazil, pp.46¯52.
Brown, S. and Lugo, A.E., 1992. Aboveground biomass estimates for tropical moist forests of the Brazilian Amazon. Interciencia 17, pp. 8¯18.
Brown, S., Lugo, A.E. and Iverson, L.R., 1992. Processes and lands for sequestering carbon in the tropical forest landscape. Water Air Soil Pollut. 64, pp.139¯155. Abstract-Compendex | Abstract-GEOBASE | Abstract-EMBASE
Brown, I.F., Nepstad, D.C., Pires, O., Luz, L.M. and Alechandre, A.S., 1992. Carbon storage and land-use in extractive reserves, Acre, Brazil. Environ. Conserv. 19, pp. 307¯315. Abstract-GEOBASE
Brown, I.F., Martinelli, L.A., Thomas, W.W., Moreira, M.Z., Ferreira, C.A. and Victoria, R.A., 1995. Uncertainty in the biomass of Amazonian forests: an example from Rondônia, Brazil. Forest Ecol. Mgmt. 75, pp. 175¯189. Abstract | PDF (1041 K)
Cochrane, M.A., Alencar, A., Schulze, M.D., Souza, C.M., Nepstad, D.C., Lefebvre, P. and Davidson, E., 1999. Positive feedbacks in the fire dynamics of closed canopy tropical forests. Science 284, pp. 1832¯1835. Abstract-EMBASE | Abstract-Elsevier BIOBASE | Abstract-Elsevier BIOBASE | Abstract-EMBASE   | Full Text via CrossRef
Fearnside, P.M., 1985. Brazil's Amazon forest and the global carbon problem. Interciencia 10, pp. 179¯186.
Fearnside, P.M., 1986. Brazil's Amazon forest and the global carbon problem: reply to Lugo and Brown. Interciencia 11, pp. 58¯64.
Fearnside, P.M., 1992. Forest biomass in Brazilian Amazonia: comments on the estimate by Brown and Lugo. Interciencia 17, pp. 19¯27.
Fearnside, P.M., 1997. Wood density for estimating forest biomass in Brazilian Amazonia. Forest Ecol. Mgmt. 90, pp. 59¯87. Abstract | PDF (1489 K)
Fearnside, P.M., 2000. Global warming and tropical land-use change: greenhouse gas emissions from biomass burning, decomposition and soils in forest conversion, shifting cultivation and secondary vegetation. Climatic Change 46, pp. 115¯158. Abstract-GEOBASE | Abstract-Elsevier BIOBASE | Abstract-BIOTECHNOBASE   | Full Text via CrossRef
Fearnside, P.M. and Barbosa, R.I., 1998. Soil carbon changes from conversion of forest to pasture in Brazilian Amazonia. Forest Ecol. Mgmt. 108, pp. 147¯166. SummaryPlus | Full Text + Links | PDF (198 K)
Houghton, R.A., Lawrence, K.T., Hackler, J.L., Brown, S., in press. The spatial distribution of forest biomass in the Brazilian Amazon: a comparison of estimates. Glob. Change Biol.
Laurance, W.F., Laurance, S.G., Ferreira, L.V., Rankin-de Merona, J.M., Gascon, C. and Lovejoy, T.E., 1997. Biomass collapse in Amazonian forest fragments. Science 278, pp. 1117¯1118. Abstract-EMBASE |
Abstract-GEOBASE   | Full Text via CrossRef
Laurance, W.F., Fearnside, P.M., Laurance, S.G., Delamonica, P., Lovejoy, T.E., Rankin-de Merona, J.M., Chambers, J.Q. and Gascon, C., 1999. Relationship between soils and Amazon forest biomass: a landscape-scale
study. Forest Ecol. Mgmt. 118, pp. 127¯138. SummaryPlus | Full Text + Links | PDF (164 K)

          

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