Plant community structure and species diversity in degraded meadow steppes at the southern foot of the Greater Xing'an Mountains
[Objective]To clarify the changes in plant community structure and diversity during the degradation process of grassland in the southern section of the Greater Xing´an Mountains.[Method]We employed a sampling method to investigate and analyze the vegetation community structure and species composition of grasslands with varyingdegrees of degradation.Important values and diversity indices were calculated to study the changes in species diversity.[Result]A total of 22 families,52 genera,and 61 species of plants were identified in the study area,with the majority belonging to the Poaceae,Compositae,Cyperaceae,Rosaceae,and Leguminosae families.As degradation intensified,biomass,height,coverage,Shannon-Wiener index,and Simpson index of plant species and communities significantly decrease.Notablythe important value of Stellera chamaejasme increased,leading to the formation ofa S.chamaejasme-dominantdegraded grassland.[Conclusion]The degradation of grassland in the southern section of the Greater Xing´an Mountains results in a simplified community structure,reduced diversity and a marked decline in-grasslandquality o,ultimately disruptingthe original stability of the grassland ecosystem.
southern foot of the Great Xing´an Mountainsmeadow grasslanddegree of degradationcommunity structurespecies diversity
万方数据
维普
