草地学报2026，Vol.34Issue(3)：1029-1040,12.DOI:10.11733/j.issn.1007-0435.2026.03.026
水分梯度下高寒草甸草丘分布引起植被生境的空间变化
Distribution of Alpine Meadow Grassy Hills Under the Moisture Gradient Induced by Vegetation Habitats Spatial Change Pattern
摘要
Abstract
In alpine meadows,the surface soil heaves to form hummocks under the influence of frost heaving,transforming the originally relatively homogeneous habitat into a heterogeneous one.In this study,9 sampling plots were established along a soil moisture gradient in the alpine meadows of the Western Sichuan Plateau.We compared and analyzed the differences in plant communities and species diversity between hummocks and inter-hummock meadows under different soil moisture conditions.The results showed that:Soil physical properties and soil chemical properties exerted effects on the plant diversity of hummocks and inter-hummock meadows,respectively.The plant community on hummocks gradually transitioned from Kobresia(sedge)-dominated veg-etation to shrub-dominated vegetation,while the plant community in inter-hummock meadows gradually shifted from Carex(sedge)and Kobresia-dominated vegetation to grass-dominated vegetation.The abundance of weedy plants and occasional species in hummocks was significantly higher than that in inter-hummock mead-ows.Habitat aridification increased the dissimilarity in species composition between hummocks and inter-hum-mock meadows,and the dissimilarity in species composition of hummocks was higher under different soil mois-ture conditions.In conclusion,hummocks tend to aridify the microhabitat and provide favorable conditions for the invasion of occasional species.Although hummocks increase plant diversity,they have a negative impact on the stability of alpine meadow vegetation.This research holds significant implications for guiding the conserva-tion and management of alpine meadow vegetation.关键词
高寒草甸/空间分异/物种多样性/草丘/丘间草地Key words
Alpine meadow/Spatial differentiation/Species diversity/Grass hummocks/Inter-hummock meadows分类
农业科技引用本文复制引用
张煜坤,王洪斌,李辰晖,张大才..水分梯度下高寒草甸草丘分布引起植被生境的空间变化[J].草地学报,2026,34(3):1029-1040,12.基金项目
国家自然科学基金项目(31960340)资助 （31960340）
