Title: Study on the Relationship between Species Diversity and Productivity of Sandy Grassland Communities in Horqin Sandland
Abstract: In this paper,the relationship between species diversity and productivity of plant communities is researched by analyzing 17 samples collected from 6 typical habitats including mobile dune,semi-mobile dune,semi-fixed dune,fixed dune, arid meadow and wet meadow.The sampling regions are situated in Naiman Desertification Research Station,Inner Mongolia.The study area is a typical farmingpastoral ecotone in north China.In August 2005,the drying aboveground biomass, numbers of plant species and their diversity of 17 grassland communities in 6 plots of 1 m×1 m were separately investigated.The study results show that there is a unimodal functional relationship between the productivity of the 17 plant communities and the 3 indexes(Shannon-wienner index,Simpson index and Pielou index) in species diversity and litter with the change of environmental gradient from poor species to rich one,which reveals that the species diversity is the highest and the litter is the thickest in the sandy grasslands with moderate productivity.In the study area of Horqin Sandland,the vegetation is degenerated in varying degrees due to the long-time desertification.Therefore,the change of species diversity and productivity of plant communities,observed in 17 plant communities in 6 habitats,and their relationship are jointly affected by the limitation of natural resources in the heterogeneous habitats and the excessive disturbance of human activities.
Publication Year: 2007
Publication Date: 2007-01-01
Language: en
Type: article
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Cited By Count: 1
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