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[1]YUAN Zi-cheng,WANG Guo-liang,LIU Guo-bin,et al.Distribution Pattern of Species Abundance in Bothriochloa ischaemun Community at Different Slope Positions in the Loess Gully Region, China[J].Research of Soil and Water Conservation,2012,19(04):81-85.

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Distribution Pattern of Species Abundance in Bothriochloa ischaemun Community at Different Slope Positions in the Loess Gully Region, China

Research of Soil and Water Conservation[ISSN 1005-3409/CN 61-1272/P] Volume: 19 Number of periods: 2012 04 Page number: 81-85 Column: Public date: 2012-08-20

Title:: Distribution Pattern of Species Abundance in Bothriochloa ischaemun Community at Different Slope Positions in the Loess Gully Region, China

Author(s):: YUAN Zi-cheng¹, WANG Guo-liang², LIU Guo-bin², LIU Tao³, GAO Hang¹, QU Qiu-ling³; 1. College of Resources and Environment, Northwest A&F University, Yangling, Shaanxi 712100, China;
2. Institute of Soil and Water Conservation, Northwest A&F University, Yangling, Shaanxi 712100, China;
3. College of Forestry, Northwest A&F University, Yangling, Shaanxi 712100, China

Keywords:: loess gully region; slope positions; Bothriochloa ischaemun L. Keng; pecies abundance distribution; niche model

CLC:: Q94812⁺1

DOI:: -

Abstract:: Analysis of species abundance(SA) is an important way to understand community structure and the underlying mechanism of community ecological processes. This paper analyzed the SA of Bothriochloa ischaemun L. Keng community at different slope positions in the Loess Gully Region of China. We fitted the SA with five niche models, including Zipf model, Zipf-mandelbrot model, niche preemption model(NPM), broken stick model (BSM) and dominance preemption model (DPM). We found out that: (1) indices of Shannon, Simpson and Patrick at the intermediate position of the slope were significantly smaller than the upland and lowland, whereas upland and lowland had no significant difference in terms of these indices; Evenness indices of Pielo (J_sw and J_si) and Alatalo showed no difference among these slope positions; (2) Zipf model, Zipf-mandelbrot model described the species abundance distribution (SAD) pattern of Bothriochloa ischaemun L. Keng community well. All these results indicated that the community formation under different slope positions shared a similar mechanism, though its diversity indices varied among these slope positions. The results of this study confirmed that the Zipf model, Zipf-mandelbrot model can successfully reproduce the community SAD at the later succession stage.

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