岷江上游干旱河谷荒坡植物群落种-面积曲线拟合及最小面积确定  

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

作　　者：杨子松[1] 黎云祥[2] 刘伟[1] 吴天德[1] 王中国 

机构地区：[1]阿坝师范高等专科学校,四川汶川623000 [2]四川省环境科学与生物多样性保护重点实验室,四川南充637002 [3]绵阳市开元中学,四川绵阳621000

出　　处：《生态与农村环境学报》2010年第3期227-230,共4页Journal of Ecology and Rural Environment

基　　金：四川省教育厅青年基金项目(2006B092);阿坝师范高等专科学校重点项目(ASA07-07ASA09-07)

摘　　要：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。The minimum sampling areas（MSA） for the plant communities on barren hillsides of arid valleys in the upper reaches of the Minjiang River were determined using the community species-area curves worked out via 3 curvilinear equations.Results show that to the types of plant communities in the study region,the species-area curve obtained via the equation S=c-ae-bA is better than the others obtained via other two equations.When the proportional factor（ρ） is set at 0.6,0.7 and 0.8,MSAs are all smaller than 2 m2 and a quadrate can be designed as 1 m × 2 m,that is,the area of the quadrate is 2 m2,which is adequate to meet the requirement of the research for precision of 60%-80%.When ρ is set at 0.9,MSAs are obviously smaller than 4 m2,and the quadrate is designed as 2 m × 2 m,that is,the area of the quadrate is 4 m2,which is adequate to meet the requirement of the research for precision of 90%.

关 键 词：荒坡群落 最小面积 种-面积曲线 干旱河谷 岷江上游 

分 类 号：Q145[生物学—生态学] X171.4[生物学—普通生物学]