林业科学研究2025，Vol.38Issue(5)：73-81,9.DOI:10.12403/j.1001-1498.20250020
长期干旱降低暖温带天然林下草本层生物多样性
Long-term Drought Reduced the Biodiversity of Understory Herb Layer in Warm Temperate Natural Forests
摘要
Abstract
[Objective]Species in the understory herb layer are crucial for maintaining biodiversity in tem-perate forests.However,research on how drought affected the diversity of understory herb layer is still un-clear.This study aimed to explore the impact of long-term simulated drought on species diversity in the un-derstory herbaceous layer,providing theoretical basis for the conservation and sustainable development of biodiversity in warm temperate deciduous broad-leaved forests under climate change.[Method]A large manipulative throughfall reduction platform was established in a typical natural secondary forest in Baotian-man.After 11 years,the diversity of the understory herb layer was investigated in both the rainfall-reduced plots and the control plots.The importance value of each plant species and the species richness,Shan-non-Wiener diversity index,Simpson dominance index and Pielou evenness index of understory herb-aceous layer were calculated.[Result]The results showed that:1)A total of 58 plant species from 34 fam-ilies were found in the herb layer of the six surveyed plots,which was much greater than the number of 26 woody plants in the canopy and subcanopy layers of the plots.2)Long-term rainfall reduction treatment significantly decreased the species richness and Shannon-Wiener diversity index of the herb layer by 44.3%and 30.1%respectively,while the Simpson dominance index and Pielou evenness index did not show significant changes.3)The Shannon-Wiener diversity index,Simpson dominance index and Pielou evenness index were significantly correlated with soil organic matter,hydrolyzable nitrogen and total phos-phorus.Species richness was significantly correlated with soil total phosphorus.[Conclusion]Biodiversity in the typical warm temperate natural secondary forests was largely determined by species in the herb-aceous layer.Long-term drought reduced the biodiversity of the understory herb layer,and soil phosphor-us might play an important role in maintaining the biodiversity of the understory herb layer.关键词
长期干旱/生物多样性/天然林/草本植物/宝天曼Key words
long-term drought/biodiversity/natural forest/herbaceous plant/Baotianman分类
农业科技引用本文复制引用
牛保亮,刘世荣,陈志成,李铭杰,闫满玉,许玥,牛晓栋,张弘毅,张会萍,刘彦春..长期干旱降低暖温带天然林下草本层生物多样性[J].林业科学研究,2025,38(5):73-81,9.基金项目
"十四五"国家重点研发计划项目"典型森林生态系统碳汇提升经营技术与增汇潜力(2021YFD2200405)" （2021YFD2200405）
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