Plant Species Diversity and Dominance Population Niche Characteristics at Different Sites in Southern Gurbantunggut Desert
Based on field surveying data in spring over southern Gurbantunggut Desert,Richness index,Shannon-Wiener index,Simpson index,Pielon index,Whittaker index,Cody index,niche breadth and niche overlap value were used to analyze the plant species diversity and dominance population niche characteristics.Results showed that:(1) Plant communities at different sites in southern Gurbantunggut Desert all were shrub-herb mode and the dominance species were Haloxylon ammodendron,Haloxylon persicum,Calligonum leucocladum,Stipagrostis pennata,Alhagi sparsifolia,Reaumuria soongorica,Lappula semiglabra,Agriophyllum squarrosum and Corispermum lehmannianum.(2) The α-diversity indices at different sites were different because of different environments.(3) Whittaker index and Cody index data showed that β-diversity index at different sites can be divided into two gradients.The first gradient was at top of dune,windward slope and upside of leeward slope,and the second gradient was at the other sites.(4) The dominance populations with high niche breadth had high niche overlap value.When we restore the vegetation in southern Gurbantunggut Desert,appropriate Haloxylon ammodendron planting density is needed,and other plant,e.g.Stipagrostis pennata,can be planted to increase species diversity.
siteplant species diversitydominance populationnicheGurbantunggut Desert
NETL
NSTL
万方数据
维普
