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Fitting of Species-Area Relationship and Determination of Minimum Sampling Area for Plant Communities on Barren Hillsides of Arid Valleys in the Upper Reaches of the Minjiang River
Pages: 227-230
Year: Issue:  3
Journal: Rural Eco-Environment

Keyword:  荒坡群落 最小面积 种-面积曲线 干旱河谷 岷江上游;
Abstract: 采用由3种曲线方程拟合的群落种-面积曲线来确定岷江上游干旱河谷荒坡植物群落的最小取样面积,结果表明:对于岷江上游干旱河谷荒坡植物群落类型而言,利用方程S=c-ae-bA拟合所得的种-面积曲线好于其他方程。当比例因子ρ取0.6、0.7、0.8时,群落最小面积均小于2 m2,样方可设置为1 m×2 m,即样地面积为2m2,能够满足精度60%~80%的研究要求;当ρ取0.9时,群落最小面积均明显小于4 m2,样方可设置为2 m×2m,即样地面积为4 m2,能够满足精度90%的研究要求。
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