Influence of Topography on Species Diversity of Grassland Plant Communities in the Altai Mountains
This study investigated the influence of topographic factors on plant community species diver-sity in grassland of the Burqin forest region within Altai Mountains,a critical component of Xinjiang′s grass-land ecosystem known for its biodiversity and water and soil conservation.A typical plot survey was employed to analyze the relationships between topographic factors and various species diversity indices.The results showed the following:(1)Species richness and diversity indices(Margalef index,Shannon-Wiener index,and Simpson index)except Alatalo index exhibited a hump-shaped pattern with increasing elevation,initially increasing,then decreasing,and finally increasing again.Alatalo index showed a similar trend but with an additional decrease at the highest elevations.Shannon-Wiener and Simpson indices dis-played significant correlations with elevation,while Margalef and Alatalo indices did not.(2)Species rich-ness and diversity indices(Margalef index,Shannon-Wiener index,and Simpson index)exhibited a"single peak"pattern with increasing slope,initially rising and then falling.Alatalo index displayed a"U-shaped"pattern,initially decreasing and then increasing with increasing slope.Shannon-Wiener,Simpson,and Alatalo indices were significantly correlated with slope,while Margalef index was not.(3)Species rich-ness and species diversity were significantly higher on shady slope compared to sunny slope.Furthermore,species diversity varied significantly across different slope orientations.Margalef,Shannon-Wiener,and Alatalo indices showed significant correlations with slope orientations,whereas the Simpson index did not.This study provides valuable theoretical insights for the conservation of species diversity and sustainable management of grassland plant communities in this region.
Grassland plant communitiesTopographic factorsSpecies diversityBurqin forest area
NETL
NSTL
万方数据
