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Past, present and future land-use in Xishuangbanna, China and the implications for carbon dynamics

Summary: Past, present and future land-use in Xishuangbanna,
China and the implications for carbon dynamics
Hongmei Li a
, Youxin Ma a,*, T. Mitchell Aide b
, Wenjun Liu a
Xishuangbanna Tropical Botanical Garden, Chinese Academy of Sciences, 88 Xuefu Road, Kunming 650223, PR China
PO Box 23360, Department of Biology, University of Puerto Rico, San Juan 00931-3360, Puerto Rico
Received 5 January 2007; received in revised form 14 May 2007; accepted 11 June 2007
Land use/land cover change is an important driver of global change and changes in carbon stocks. Estimating the changes in carbon stocks due
to tropical deforestation has been difficult, mainly because of uncertainties in estimating deforestation rates and the biomass in the forest that have
been cut. In this study, we combined detailed land-use change over a 27-year period based on satellite images and forest inventory data to estimate
changes in biomass carbon stocks in the Xishuangbanna prefecture (1.9 million ha) of China. Xishuangbanna is located in southwestern China in
the upper watershed of the Mekong River, and the major forest types are tropical seasonal rain forest, mountain rain forest, and subtropical
evergreen broadleaf forest. In the past when the region was completely forested the total biomass carbon would have been approximately
212.65 Ă 8.75 Tg C. By 1976 forest cover had been reduced to 70%, and in addition many forests had been degraded resulting in a large decrease in
the total biomass carbon stocks (86.97 Ă 3.70 Tg C). From 1976 to 2003, the mean deforestation rate was 13 722 ha year└1
(1.12%), and this


Source: Aide, Mitchell - Department of Biology, Universidad de Puerto Rico - Rio Piedras


Collections: Environmental Sciences and Ecology