• 研究报告 •

### 冷杉-铁杉林各层盖度在冷箭竹更新恢复中的变化

1. 1中国大熊猫保护研究中心， 四川都江堰 611830； 2Department of geography, The Pennsylvania State University, 302 Walker Building, University Park, PA 16802, USA）
• 出版日期:2017-09-10 发布日期:2017-09-10

### Coverage change of ground and canopy layers in AbiesTsuga forests during the natural regeneration of Bashania faberi.

ZHOU Shi-qiang1*, LI Zhong1, HUANG Jin-yan1, Alan H. TAYLOR2, LIU Dian1, ZHANG Ming-chun1, ZHOU Xiao-ping1, ZHANG He-min1#br#

1. (1 China Conservation and Research Center for the Giant Panda, Dujiangyan 611830, Sichuan, China; 2Department of Geography, The Pennsylvania State University, 302 Walker Building, University Park, PA 16802, USA)
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• Online:2017-09-10 Published:2017-09-10

Abstract: Arrow bamboo (Bashania faberi) is one of the major staplefood species for wild giant panda (Ailuropoda melanoleuca). In the spring of 1983, massive flowering and dieoff of arrow bamboos occurred in Wolong, Sichuan. The goal of this study is to understand the natural regeneration process of arrow bamboo, a dominant understory species beneath the canopy of AbiesTsuga forests, and the relationship between vegetation layers by analyzing the coverage change during different stages of the regeneration process. We measured the coverage of trees, herbs and moss, and bamboos in seven permanent plots in an oldgrowth AbiesTsuga forest in Wolong National Nature Reserve, Sichuan, China from 1984 to 2013. Arrow bamboo died off in 1983 in six of the seven forest plots. The results showed that, except for two plots, the bamboo coverage in the regenerative bamboo forests was increasing since the dieoff, reaching 60% in 2013. The coverage change of the remnant bamboo forests exhibited a unimodal pattern. The coverage of the herb and moss layers in subsequent years was lower than that of the bamboo dieoff phase in five plots. The results from the KruskaiWallis test revealed a significant difference in canopy coverage between 1984 and 2013; however, the difference of canopy coverage was minor between those two years, ranging from 0.60% to 18.89%. The difference in coverage change patterns among the seven forest plots was mainly related to site conditions. In addition, we also tried to visualize the bamboo coverage across different time periods, which helped to intuitively understand the spatial dynamic patterns of bamboo coverage during the regeneration process of bamboo forest.