G.B. Pant National Institute of Himalayan Environment (NIHE), Sikkim Regional Centre, PangthangGangtok, Sikkim, 737 101, India.
, D-408, Aditya Doonshire Apartments, Sailok Phase II, GMS Road, Dehradun, Uttarakhand, 248 001, India.
Sci Rep. 2022 Mar 16;12(1):4468. doi: 10.1038/s41598-022-08483-8.
The Khangchendzonga Landscape (KL), a part of 'Himalayan Biodiversity Hotspot', is known for its unique biodiversity assemblage. In recent years, the KL is experiencing threats to biodiversity due to the biological overdominance of native Maling bamboo (Yushania maling). In the present study, we investigated the impacts of the overdominance of Y. maling on the forest composition of Singalila National Park (SNP), Eastern Himalaya, India. Elevational habitats 2400 to 3400 m asl were sampled by laying 69 (10 m × 10 m) forest plots including 51 bamboo plots and 18 non-bamboo plots. Bamboo plots showed significantly (p < 0.05) low species richness and density in both shrub and herb layers which further manifested the low seedling density. Generalized Additive Model (GAM) estimated a significant (p < 0.0001) decline in species richness and density with increasing bamboo density in SNP. Our study projects the overdominance of Y. maling has a significant negative impact on forest structure and composition. Therefore, management of invasiveness of Y. maling is essential through its optimized removal from the protected areas and utilization in making handicrafts, paper industries etc. to create ecological and economic benefits. Further long-term studies assessing the impacts of Y. maling overdominance on forest ecosystems and soil dynamics are recommended.
干城章嘉景观（KL）是“喜马拉雅生物多样性热点”的一部分，以其独特的生物多样性组合而闻名。近年来，由于本地麻竹林（玉山箭竹）的生物过度优势，KL 正面临着生物多样性受到威胁的问题。本研究调查了玉山箭竹过度优势对东喜马拉雅Singalila 国家公园（SNP）森林组成的影响。在海拔 2400 至 3400 米的海拔生境中，通过铺设 69 个（10 m×10 m）森林样方（包括 51 个竹样方和 18 个非竹样方）进行采样。竹样方的灌木和草本层的物种丰富度和密度明显较低（p<0.05），这进一步表明幼苗密度较低。广义加性模型（GAM）估计，随着 SNP 中竹密度的增加，物种丰富度和密度呈显著（p<0.0001）下降趋势。我们的研究表明，玉山箭竹的过度优势对森林结构和组成有重大负面影响。因此，必须通过优化从保护区中清除玉山箭竹并将其用于制作手工艺品、造纸等行业，来管理其入侵性，以创造生态和经济效益。建议进一步进行长期研究，评估玉山箭竹过度优势对森林生态系统和土壤动态的影响。
