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《Journal of Beijing Normal University(Natural Science)》 2009-03
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CHANGES IN SPECIES DIVERSITY AND CONTRIBUTING FACTORS IN SUBALPINE MEADOWS IN DONGLING MOUNTAIN

XIANG Chunling ZHANG Jintun (College of Life Sciences,Beijing Normal University,100875,Beijing,China)  
Diversity in plant species in 7 associations in subalpine meadows on Dongling Mountain is studied using richness index(R),Simpson index(λ)、Shannon-Weiner index(H′) and evenness index(E1),respectively.The results show that bcause of the different habitats of different types of association,which leads to variation of every index among different associations.The R and H′ declines with increasing elevation.E1 increase with mounting elevation.With the disturbing of traveling and grazing,the R and H′ decrease with increasing disturbance degree,the E1 of contrast.Tourism and grazing enable species to develop in the direction of uniformity,at the same time promoting growth of species unfit to eat,endurable to trample,and human-accompanying.
【Fund】: 国家自然科学基金资助项目(30870399)
【CateGory Index】: Q948
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