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Old-growth forests can accumulate carbon in soils

January 1, 2006

Old-growth forests have traditionally been considered negligible as carbon sinks because carbon uptake has been thought to be balanced by respiration. We show that the top 20-centimeter soil layer in preserved old-growth forests in southern China accumulated atmospheric carbon at an unexpectedly high average rate of 0.61 megagrams of carbon hectare-1 year-1 from 1979 to 2003. This study suggests that the carbon cycle processes in the belowground system of these forests are changing in response to the changing environment. The result directly challenges the prevailing belief in ecosystem ecology regarding carbon budget in old-growth forests and supports the establishment of a new, nonequilibrium conceptual framework to study soil carbon dynamics.

Publication Year 2006
Title Old-growth forests can accumulate carbon in soils
DOI 10.1126/science.1130168
Authors G. Zhou, S. Liu, Z. Li, Dongxiao Zhang, X. Tang, C. Zhou, J. Yan, J. Mo
Publication Type Article
Publication Subtype Journal Article
Series Title Science
Index ID 70028906
Record Source USGS Publications Warehouse
USGS Organization Earth Resources Observation and Science (EROS) Center