Selective logging in the Brazilian Amazon

被引：678

作者：

Asner, GP ^{[1
]}

Knapp, DE

Broadbent, EN

Oliveira, PJC

Keller, M

Silva, JN

机构：

[1] Carnegie Inst Sci, Dept Global Ecol, Stanford, CA 94305 USA

[2] US Forest Serv, USDA, Int Inst Trop Forestry, Rio Piedras, PR USA

[3] Univ New Hampshire, Complex Syst Res Ctr, Durham, NH 03824 USA

[4] Empresa Brasileira Pesquisa Agropecuaria Amazonia, BR-66095100 Belem, Para, Brazil

来源：

SCIENCE | 2005年 / 310卷 / 5747期

关键词：

D O I：

10.1126/science.1118051

中图分类号：

O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];

学科分类号：

07 ; 0710 ; 09 ;

摘要：

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 similar to 0.1 billion metric tons of carbon was destined for release to the atmosphere by logging.

引用

页码：480 / 482

页数：3

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