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Characteristics of typhoon disturbed gaps in an old-growth tropical montane rainforest in Hainan Island, China

Journal of Forestry Research 2017年第6期28卷 1224-1232页

作者： Huai Yang Shirong Liu Kunfang Cao Jingxin Wang Yide Li Han Xu Research Institute of Tropical Forestry Chinese Academy of Forestry Key Laboratory of Forest Ecology and Environment of State Forestry Administration Institute of Forest EcologyEnvironment and Protection Chinese Academy of Forestry State Key Laboratory for Conservation and Utilization of Subtropical Agro-Bioresources and College of ForestryGuangxi University Division of Forestry and Natural Resources West Virginia University

disturbances that create gaps can shape the structure and function of forests. However, such disturbance regimes in Asian tropical montane rainforests remain largely unquantified. Least studied are typhoon disturbances that are attributable to climate change. We investigated gap characteristics in terms of size, age, and gap-maker to quantify the gap disturbance regimes in an intact old-growth tropical montane rainforest on Hainan Island, China. The intensity of typhoons has increased since 1949, and typhoon winds blow mostly (45.5%) from the northeast corner of Hainan Island, resulting in a higher frequency of gaps in the northeast. A total of 221 gap-makers (trees that fell to create canopy gaps) and 53 gaps were observed in a 3.16 ha old-growth rainforest. Most canopy gaps (85%) were disturbance was the dominant agent of gap formation in this old-growth rainforest that is subject to increasing typhoon disturbances.

关键词： Gap characteristics Gap-makers Old-growth Slope Tropical montane rainforest typhoon disturbance Wood density

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