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Biomass of primary and secondary vegetation in Rondônia, Western Brazilian Amazon
Author(s) -
ALVES DIÓGENES,
SOARES JOÃO VIANEI,
AMARAL SILVANA,
MELLO ELIANA,
ALMEIDA SÉRGIO,
DA SILVA OSMAN FERNANDES,
SILVEIRA ANDREA
Publication year - 1997
Publication title -
global change biology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 4.146
H-Index - 255
eISSN - 1365-2486
pISSN - 1354-1013
DOI - 10.1046/j.1365-2486.1997.00081.x
Subject(s) - vegetation (pathology) , amazon rainforest , biomass (ecology) , secondary forest , forestry , old growth forest , geography , environmental science , primary production , ecology , ecosystem , biology , medicine , pathology
Biomass estimates of primary and different ages of secondary vegetation are reported for a tropical forest region in Rondônia, Western Brazilian Amazon. The estimates are based on published allometric equations, and on vegetation composition and allometric data collected in areas of primary forest and secondary vegetation of ages 2, 3, 5, 9, 11, 16 and 18 years. Primary forest biomass estimates varied from 290 to 495 t ha –1 . Secondary vegetation biomass estimates accounted for 40–60% of the primary forest biomass after 18 years of abandonment. Secondary growth rates in lightly used areas are estimated to have varied from 6.6 to 8.7 t ha –1 y –1 between the third and the eighteenth years after abandonment. CO 2 sequestration by regrowing vegetation is discussed for two scenarios of land abandonment.