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[1]SUN Rao-bin,YE Min-sheng,WU Bin,et al.Characteristics of Main Shrub Populations in the Original Area of the Minjiang River[J].Research of Soil and Water Conservation,2012,19(01):125-129,133.

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Characteristics of Main Shrub Populations in the Original Area of the Minjiang River

Research of Soil and Water Conservation[ISSN 1005-3409/CN 61-1272/P] Volume: 19 Number of periods: 2012 01 Page number: 125-129,133 Column: Public date: 2012-02-20

Title:: Characteristics of Main Shrub Populations in the Original Area of the Minjiang River

Author(s):: SUN Rao-bin¹, YE Min-sheng¹, WU Bin¹, GUAN Wen-bin², MA Ke-ming³, LIU Guo-hua⁴; 1. Qinghai Engineering Consulting Center, Xi’ning 810001, China;
2. College of Soil and Water Conservation, Beijing Forestry University, Beijing 100083, China;
3. College of Nature Conservation, Beijing Forestry University, Beijing 100083, China;
4. Research Center for Eco-Environment Sciences, CAS, Beijing 100085, China

Keywords:: shrub populations; niche breadth; niche overlap; environmental gradient; the original area of the Minjiang River

CLC:: S718.5;Q948

DOI:: -

Abstract:: This paper reports a field study on characteristics of shrub population niche in the original area of the Minjiang River to provide a scientific base for vegetation restoration and management. Niche breadths and overlaps of 30 main shrub populations along gradients of soil moisture, total N, available P, available K, soil pH, and organic matter were analyzed using Levins and Schoener indices. Cotoneaster acuminatus, Rosa omeiensis, Spiraea alpina, Potentilla fruticosa, Spiraea rosthornⅡ, Sibiraea angustata, Salix cupularis, Caragana tangutica have higher niche breadth and adaptability to environment, which become the dominant species and play a vital role in maintaining the diversity and stability of plant community; niche breadth of each population in different resource dimension shows that different population has specific ability to use resources, so they have different ecological adaptability. The sum of niche breadth of all populations in different resource dimension is as the following order: available K>available P>total N>organic matter>soil moisture>soil pH. It indicates that the abilities of populations using soil moisture and soil pH were lower than that of available K and available P; not all species with low niche breadth were not dominant species in the communities, which depended on the range and evenness of species distribution. Compared with the main shurb populations of aried valley, the significant difference of using resource ability exited in the main shrub populations of the original area of the Minjiang River.

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