【摘要】 对小嵩草草甸植物群落多样性与海拔关系的研究结果表明 ,群落中物种丰富度沿海拔梯度呈近似的“钟形”变化趋势 ,有 9个种群为 4个海拔梯度植物群落中的共有种 ;建群种小嵩草的相对多度随海拔的升高而减少 ,低海拔 3170m呈单优势植物群落 ;生态优势度随海拔升高而下降 ,物种多样性和均匀度则随海拔升高而增加更多还原

【Abstract】 The Kobresia pygmaea meadow plant community diversity in relation to altitude gradient in were studied in range of Qilian county, Haibei, Qinghai. The results were as follws: The shape of species richness responsive curves to altitude gradient is “Bell-shaped”. There are 9 common species in the four communities. Relative abundance of Kobresia pygmaea decreases along with the increase of altitude. And there is only one dominant species in plant community in altitude 3170m. The ecological dominance decreases along with the increase of altitude, while the species diversity index and the evenness index are on the contrary.更多还原