cje ›› 2009, Vol. 28 ›› Issue (10): 2020-2025.
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YANG Wei-kang;JIANG Hui-ping;WANG Xue-qin|XU Wen-xuan
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Abstract: In May 2006, an investigation was made on the plant species composition, vegetation coverage, species density, and aboveground biomass at the Rhombomys opinms burrow sites and control sites in Gurbantonggut Desert, aimed to understand the disturbance effects of R. opinms on the plant species composition and vegetation structure in the Desert. MannWhitney U test showed that the plant species number at the burrow sites (16.1) was significantly higher than at control sites (13.8) (Z=2436, P<005), while the subshrub species richness at the burrow sites (0.8) was significantly lesser than that at the control sites (1.9) (Z=3.442, P<0.01). Under the disturbance of R. opinms, the average vegetation coverage at the burrow sites (2.40%±2.30%) was far lesser than that at the control sites (1446%±682%) (Z=3.63, P<0.01, and the aboveground biomass at the burrow sites (6.52 g·m-2±6.30 g·m-2) was also lower than that at the control sites (23.3 g·m-2±12.85 g·m-2, Z=3.708, P<001). The Simpson Index (0.75±0.10, n=10) and ShannonWiener Index (0.78±0.12, n=10) of the burrow sites were significantly higher than those (0.61±0.16, n=10; 0.60±0.16, n=10) of the control sites (t=2.362, P<0.05; t=2.948, P<0.01). Our results suggested that the burrowing and feeding activities of R. opinms increased the diversity of annul plants and induced the deterioration of subshrubs, and to some extent, the plant community at the burrow sites was characterized by secondary succession.
Key words: Mid-eastern China, Landscape mapping, Land-use/cover dynamic analysis
YANG Wei-kang;JIANG Hui-ping;WANG Xue-qin|XU Wen-xuan. Disturbance effects of Rhombomys opinms on desert plant community in Gurbantonggut Desert.[J]. cje, 2009, 28(10): 2020-2025.
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URL: http://www.cje.net.cn/EN/abstract/abstract16340.shtml
http://www.cje.net.cn/EN/Y2009/V28/I10/2020