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Lost in transition： Forest transition and natural forest loss in tropical china

Plant Diversity 2017年第3期39卷 149-153页

作者： Deli Zhai Jianchu Xu Zhicong Dai Dietrich Schmidt-Vogt Centre for Mountain Ecosystem Studies (CMES) Kunming Institute of Botuny (CAS) Lanhei Road 132 Kunming 650201 China World Agroforestry Centre (ICRAF) Central and East Asia Office Lanhei Road132 Kunming 650201 China Instituteof-Environment and Ecology School of the Environment and Safety Engineering fiangsu University No. 301 Xuefu Road Zhenjiang 212013 China Mountain Societies Research Institute University of Central Asia 138 Toktogul Street Bishkek 720001 Kyrgyzstan

The term forest transition refers to a change in forest cover over a given area from a period of net forest area loss to a period of net gain. Whether transitioning from deforestation to reforestation can lead to improved ecosystem services, depends on the quality and characteristics of the newly established forest cover. Using publicly available data, we examine forest transition in two regions of tropical china: Hainan Island and Xishuangbanna. We found that the overall increase of forest cover in both areas during the1980 s was due to an increase in plantation forests rather than to increases in the area covered by natural forest. We also found a time lag between the increase in overall forest cover and an increase in natural forest. On Hainan Island, natural forest continued to decline beyond the point in time when overall forest cover had started to increase, and only began to recover ten years after the turning point in 1978. In Xishuangbanna, where the transition point occurred ten years later, the decline of natural forest cover is still going on. These divergent trends underlying forest transition are concealed by the continued practice to apply the term "forest" broadly, without distinguishing between natural forests and planted *** to the use of undiscriminating terminology, the loss of natural forest may go unnoticed, increasing the risk of plantation forests displacing natural forests in the course of forest transition. Our findings are important for programs related to forest management and ecosystem services improvement, including reforestation and Payments for Ecosystem Services programs.

关键词： Deforestation Forest transition Rubber plantation Time lag tropical china

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