000			03700nam a2200649 a 4500
999			_c136437 _d136437
003			CR-TuBCO
005			20230430065112.0
007			ta
008			140703t2005 xxu||||| |||| 00| 0 eng d
022			_a0378-1127
040			_aCR-TuBCO _cCR-TuBCO _bspa
041			_aspa
100			_999582 _aNogueira, Euler Melo _uNational Institute for Research in the Amazon, Manaus, Amazonas, Brazil
245			_aWood density in dense forest in central Amazonia, Brazil
260			_aÁmsterdam (Países Bajos) _bElsevier _c2005
270			_aSan José, C.R.
300			_a26 páginas _b: 3 ilustraciones, 2 tablas
504			_aBibliografía páginas 284-286
520			_aBased on samples from 310 trees in 186 species or morpho-species collected near Manaus, Brazil, the present study finds that commonly used wood density estimates found in published lists by species need to be adjusted downward by 5.3%. Taking the average bole density from this study as a standard, wood density overestimations in three prior studies of the central Amazon were found to be 6%, 4% and 0. The arithmetic mean of the basic density of the trunk—average of the density at breast height and at the top of the bole—was 0.675 ± 0.101. The mean basic density of the bole, adjusted for tapering, and using four samples along the bole, was 0.670 ± 0.099. The arithmetic mean of the basic density for the same trees was 0.675 ± 0.098. The basic density of central heartwood was 0.766 ± 0.158. Significant differences exist between the various published estimates for Amazonian forest biomass and emissions, but we emphasize that revision of density values based on the present study will not reduce these discrepancies; instead, all estimates will shift in parallel to lower levels. Adjustments to biomass and emissions are sufficiently large to be significant for the global carbon balance. Decrease of similar proportions would apply throughout the tropics. For the 1980s, these downward adjustments total 113 × 106 Mg C/year for CO2 effects alone, or approximately 132 Mg CO2-equivalent C/year including trace gases.
650			_9136468 _aARBOLES
650		0	_aMADERA _9133837
650			_9154288 _aMEDICION
650			_9168593 _aVOLUMEN
650			_9137963 _aBIOMASA
650			_9139477 _a CARBONO
650			_9135397 _aALMACENAMIENTO
650			_9146866 _aESTIMACION
650			_9155109 _a MODELOS
650			_9135462 _aALOMETRIA
650			_9144342 _aDIAMETRO A LA ALTURA DE PECHO
650			_9148954 _aGASES DE EFECTO INVERNADERO
650			_9143616 _aDEFORESTACION
650			_9145225 _aECUACIONES ALOMETRICAS
650			_9143730 _aDENSIDAD DE LA MADERA
650			_9135570 _aAMAZONIA
650			_9147801 _aFERRALSOLES
650		0	_aAGRICULTURA _94
650			_aTREES _9167266
650			_aWOOD _9168689
650			_aMEASUREMENT _9154228
650			_aVOLUME _9343077
650			_aBIOMASS _9137969
650			_aCARBON _9139459
650			_aSTORAGE _9165411
650			_aMODELS _9327554
650			_aGREENHOUSE GASES _9149687
650			_aDEFORESTATION _9143618
650		0	_9318950 _aFERRALSOLS
650		0	_aFORESTS _9148332
651			_92040 _aBRASIL
700			_998953 _aNelson, Bruce Walker _c (autor/a) _uNational Institute for Research in the Amazon, Manaus, Amazonas, Brazil
700			_966680 _aFearnside, Philip M. _c (autor/a) _uNational Institute for Research in the Amazon, Manaus, Amazonas, Brazil
830			_aForest Ecology and Management _nnúmero 1-3 _pAbril _ppáginas 261-286 _vVolumen 208
856			_uhttps://www.sciencedirect.com/science/article/abs/pii/S0378112704008606 _qpdf _yeng
942			_cANA _2z