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天山南北坡植物种-面积关系

, PP. 54-59

Keywords: 草甸,草原,荒漠,生物多样性,水分,物种丰富度,天山,新疆

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Abstract:

通过对天山南北坡25个样地的物种-面积关系的研究,结果发现①所有样地种-面积关系斜率的平均值为0.21±0.02,低于全球平均水平;②草甸、草原和荒漠的种-面积关系的斜率分别为0.14±0.02,0.13±0.01和0.28±0.02。草甸和草原的种-面积关系斜率无显著差别,但两者显著低于荒漠的种-面积关系斜率;③天山南北坡种-面积关系斜率与水分和能量因素均存在显著相关关系,全气候模型解释率为80.42%,其中水分因子的影响最大,为负相关,解释率为69.88%;与物种丰富度对数呈显著负相关关系;④天山南北坡种-面积关系截距与能量因子、水分因子和气候稳定性因子均显著相关,全气候模型解释率为91.9%,水分影响最大,为66.22%,正相关;与物种丰富度也呈显著正相关关系。表明水分因子是影响天山南北坡植物种-面积关系的主要因子,物种丰富度也对其存在显著影响。

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