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Aboveground biomass and its biotic and abiotic modulators of a main food bamboo of the giant panda in a subalpine spruce-fir forest in southwestern China

引用

Journal of Plant Ecology 2022年第1期15卷 1-12页

作者： Xinyu Xiong Jiangling Zhu Sheng Li Fan Fan Qiong Cai Suhui Ma Haojie Su Chengjun Ji Zhiyao Tang Jingyun Fang Institute of Ecology Peking UniversityBeijing 100871China Department of Ecology College of Urban and Environmental Sciencesand Key Laboratory for Earth Surface Processes of the Ministry of EducationPeking UniversityBeijing 100871China School of Life Sciences Peking UniversityBeijing 100871China

As one of the main food bamboo species of the giant panda(Ailuropoda melanoleuca),Fargesia denudata is widely distributed in the understory of spruce-fir forests in the mountainous area of southwestern ***,the driving factors of its biomass and distribution in the forests are still *** conducted a systematic investigation of the tree and shrub layers(including bamboos)of 209 subplots(20 m×20 m)in a Forest Global Earth Observatory plot,the Wanglang Plot(25.2 ha),to explore the effects of abiotic(topographic and soil characteristics)and biotic(tree density,total basal area(TBA),shrub coverage,etc.)factors on the aboveground biomass of ***(bamboo biomass hereafter).Bamboo biomass averaged 1.17 ton/ha,with a large variation from 0 to 4.88 ton/ha(95%confidence interval)among the 209 *** biomass increased significantly with elevation,slope and mean diameter at breast height of trees,and decreased significantly with tree density,shrub coverage and soil ***,bamboo biomass was not significantly correlated with tree TBA,aspect,soil organic matter or total nitrogen *** random forest model indicated that topographic factors and biotic factors had greater influences on the bamboo biomass than soil characteristics in ***,topographic factors mainly affected the bamboo biomass by changing tree density and soil *** results can provide valuable guidance for the protection of giant pandas and the management of subalpine spruce-fir forests.

关键词： aboveground biomass community structure Fargesia denudata spruce-fir forests topography

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