Condition and fate of logged forests in the Brazilian Amazon

Gregory P. Asner, Eben N. Broadbent, Paulo J.C. Oliveira, Michael Keller, David E. Knapp, José M.M. Silva

Research output: Contribution to journalArticle

212 Citations (Scopus)

Abstract

The long-term viability of a forest industry in the Amazon region of Brazil depends on the maintenance of adequate timber volume and growth in healthy forests. Using extensive high-resolution satellite analyses, we studied the forest damage caused by recent logging operations and the likelihood that logged forests would be cleared within 4 years after timber harvest. Across 2,030,637 km2 of the Brazilian Amazon from 1999 to 2004, at least 76% of all harvest practices resulted in high levels of canopy damage sufficient to leave forests susceptible to drought and fire. We found that 16 ±1% of selectively logged areas were deforested within 1 year of logging, with a subsequent annual deforestation rate of 5.4% for 4 years after timber harvests. Nearly all logging occurred within 25 km of main roads, and within that area, the probability of deforestation for a logged forest was up to four times greater than for unlogged forests. In combination, our results show that logging in the Brazilian Amazon is dominated by highly damaging operations, often followed rapidly by deforestation decades before forests can recover sufficiently to produce timber for a second harvest. Under the management regimes in effect at the time of our study in the Brazilian Amazon, selective logging would not be sustained.

Original languageEnglish (US)
Pages (from-to)12947-12950
Number of pages4
JournalProceedings of the National Academy of Sciences of the United States of America
Volume103
Issue number34
DOIs
StatePublished - Aug 22 2006
Externally publishedYes

Fingerprint

Conservation of Natural Resources
Forests
Droughts
Brazil
Industry
Growth

Keywords

  • Brazil
  • Forest disturbance
  • Remote sensing
  • Selective logging
  • Tropical forest

ASJC Scopus subject areas

  • General

Cite this

Condition and fate of logged forests in the Brazilian Amazon. / Asner, Gregory P.; Broadbent, Eben N.; Oliveira, Paulo J.C.; Keller, Michael; Knapp, David E.; Silva, José M.M.

In: Proceedings of the National Academy of Sciences of the United States of America, Vol. 103, No. 34, 22.08.2006, p. 12947-12950.

Research output: Contribution to journalArticle

Asner, Gregory P. ; Broadbent, Eben N. ; Oliveira, Paulo J.C. ; Keller, Michael ; Knapp, David E. ; Silva, José M.M. / Condition and fate of logged forests in the Brazilian Amazon. In: Proceedings of the National Academy of Sciences of the United States of America. 2006 ; Vol. 103, No. 34. pp. 12947-12950.
@article{54d45d03881f423bb5da65946bd5003f,
title = "Condition and fate of logged forests in the Brazilian Amazon",
abstract = "The long-term viability of a forest industry in the Amazon region of Brazil depends on the maintenance of adequate timber volume and growth in healthy forests. Using extensive high-resolution satellite analyses, we studied the forest damage caused by recent logging operations and the likelihood that logged forests would be cleared within 4 years after timber harvest. Across 2,030,637 km2 of the Brazilian Amazon from 1999 to 2004, at least 76{\%} of all harvest practices resulted in high levels of canopy damage sufficient to leave forests susceptible to drought and fire. We found that 16 ±1{\%} of selectively logged areas were deforested within 1 year of logging, with a subsequent annual deforestation rate of 5.4{\%} for 4 years after timber harvests. Nearly all logging occurred within 25 km of main roads, and within that area, the probability of deforestation for a logged forest was up to four times greater than for unlogged forests. In combination, our results show that logging in the Brazilian Amazon is dominated by highly damaging operations, often followed rapidly by deforestation decades before forests can recover sufficiently to produce timber for a second harvest. Under the management regimes in effect at the time of our study in the Brazilian Amazon, selective logging would not be sustained.",
keywords = "Brazil, Forest disturbance, Remote sensing, Selective logging, Tropical forest",
author = "Asner, {Gregory P.} and Broadbent, {Eben N.} and Oliveira, {Paulo J.C.} and Michael Keller and Knapp, {David E.} and Silva, {Jos{\'e} M.M.}",
year = "2006",
month = "8",
day = "22",
doi = "10.1073/pnas.0604093103",
language = "English (US)",
volume = "103",
pages = "12947--12950",
journal = "Proceedings of the National Academy of Sciences of the United States of America",
issn = "0027-8424",
number = "34",

}

TY - JOUR

T1 - Condition and fate of logged forests in the Brazilian Amazon

AU - Asner, Gregory P.

AU - Broadbent, Eben N.

AU - Oliveira, Paulo J.C.

AU - Keller, Michael

AU - Knapp, David E.

AU - Silva, José M.M.

PY - 2006/8/22

Y1 - 2006/8/22

N2 - The long-term viability of a forest industry in the Amazon region of Brazil depends on the maintenance of adequate timber volume and growth in healthy forests. Using extensive high-resolution satellite analyses, we studied the forest damage caused by recent logging operations and the likelihood that logged forests would be cleared within 4 years after timber harvest. Across 2,030,637 km2 of the Brazilian Amazon from 1999 to 2004, at least 76% of all harvest practices resulted in high levels of canopy damage sufficient to leave forests susceptible to drought and fire. We found that 16 ±1% of selectively logged areas were deforested within 1 year of logging, with a subsequent annual deforestation rate of 5.4% for 4 years after timber harvests. Nearly all logging occurred within 25 km of main roads, and within that area, the probability of deforestation for a logged forest was up to four times greater than for unlogged forests. In combination, our results show that logging in the Brazilian Amazon is dominated by highly damaging operations, often followed rapidly by deforestation decades before forests can recover sufficiently to produce timber for a second harvest. Under the management regimes in effect at the time of our study in the Brazilian Amazon, selective logging would not be sustained.

AB - The long-term viability of a forest industry in the Amazon region of Brazil depends on the maintenance of adequate timber volume and growth in healthy forests. Using extensive high-resolution satellite analyses, we studied the forest damage caused by recent logging operations and the likelihood that logged forests would be cleared within 4 years after timber harvest. Across 2,030,637 km2 of the Brazilian Amazon from 1999 to 2004, at least 76% of all harvest practices resulted in high levels of canopy damage sufficient to leave forests susceptible to drought and fire. We found that 16 ±1% of selectively logged areas were deforested within 1 year of logging, with a subsequent annual deforestation rate of 5.4% for 4 years after timber harvests. Nearly all logging occurred within 25 km of main roads, and within that area, the probability of deforestation for a logged forest was up to four times greater than for unlogged forests. In combination, our results show that logging in the Brazilian Amazon is dominated by highly damaging operations, often followed rapidly by deforestation decades before forests can recover sufficiently to produce timber for a second harvest. Under the management regimes in effect at the time of our study in the Brazilian Amazon, selective logging would not be sustained.

KW - Brazil

KW - Forest disturbance

KW - Remote sensing

KW - Selective logging

KW - Tropical forest

UR - http://www.scopus.com/inward/record.url?scp=33748085010&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=33748085010&partnerID=8YFLogxK

U2 - 10.1073/pnas.0604093103

DO - 10.1073/pnas.0604093103

M3 - Article

C2 - 16901980

AN - SCOPUS:33748085010

VL - 103

SP - 12947

EP - 12950

JO - Proceedings of the National Academy of Sciences of the United States of America

JF - Proceedings of the National Academy of Sciences of the United States of America

SN - 0027-8424

IS - 34

ER -