RT Journal Article
SR Electronic
T1 Selective Logging in the Brazilian Amazon
JF Science
JO Science
FD American Association for the Advancement of Science
SP 480
OP 482
DO 10.1126/science.1118051
VO 310
IS 5747
A1 Asner, Gregory P.
A1 Knapp, David E.
A1 Broadbent, Eben N.
A1 Oliveira, Paulo J. C.
A1 Keller, Michael
A1 Silva, Jose N.
YR 2005
UL http://science.sciencemag.org/content/310/5747/480.abstract
AB Amazon deforestation has been measured by remote sensing for three decades. In comparison, selective logging has been mostly invisible to satellites. We developed a large-scale, high-resolution, automated remote-sensing analysis of selective logging in the top five timber-producing states of the Brazilian Amazon. Logged areas ranged from 12,075 to 19,823 square kilometers per year (±14%) between 1999 and 2002, equivalent to 60 to 123% of previously reported deforestation area. Up to 1200 square kilometers per year of logging were observed on conservation lands. Each year, 27 million to 50 million cubic meters of wood were extracted, and a gross flux of ∼0.1 billion metric tons of carbon was destined for release to the atmosphere by logging.