生态学杂志2024，Vol.43Issue(6)：1674-1680,7.DOI:10.13292/j.1000-4890.202406.021
青藏高原草地植物多样性沿降水梯度的分布格局及影响因素
Distribution patterns and driving factors of grassland plant diversity along a precipitation gradient on the Qinghai-Tibet Plateau
摘要
Abstract
The distribution patterns of plant diversity in the Qinghai-Tibet Plateau vary across spatial scales.How-ever,the factors that drive these patterns are still unclear.We investigated plant community and soils in 33 grass-land sites along a precipitation gradient from Qinghai-Tibet Plateau,and elucidated the patterns of plant species di-versity from three aspects:α,β,and γ diversity.Linear regression and structural equation modeling(SEM)were used to explore the direct or indirect factors affecting the distribution patterns of plant diversity.We found that α di-versity and γ diversity increased,while β diversity decreased with increasing precipitation.Increased precipitation enhanced α diversity directly by changing soil moisture and indirectly by increasing soil inorganic nitrogen content.Moreover,increased precipitation indirectly increased γ diversity by increasing soil N/P ratio and decreasing soil pH.In summary,changes of precipitation can alter soil physicochemical properties,and thus affect plant diversity at different spatial scales.关键词
降水格局/环境因子/植物多样性/土壤理化参数/空间尺度/青藏高原Key words
precipitation pattern/environmental factor/plant diversity/soil physicochemical property/spatial scale/Qinghai-Tibet Plateau引用本文复制引用
张小燕,冯明,刘倩光,杨国姣,胡中民..青藏高原草地植物多样性沿降水梯度的分布格局及影响因素[J].生态学杂志,2024,43(6):1674-1680,7.基金项目
海南大学科研启动经费(KYQD(ZR)-22082)、"第二次青藏高原综合科学考察研究"任务和青藏高原碳汇关键区调查(2019QZKK0405)资助. （KYQD(ZR）
