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Their niche breadths were calculated by Levins equation.
根据Levins公式计算了75种藓类植物的生态位宽度。
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Based on field investigation and by using Levins and Pianka formula, the niches of seven bryophyte species in Hani Peatland of Changbai Mountains were studied.
采用Levins和Pianka，对哈泥泥炭地7种苔藓植物的生态位进行了研究。
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Based on the data collected from 8 plots and using Shannon and Simpson index, this paper calculated and analyzed diversity of Eupatorium catarium community in Hainan. And, niche breadth and niche overlap of E. catarium community were analyzed by using Levins and Pianka formulae. The results were as follows:(1)The diversity of E.
基于对海南儋州地区假臭草群落的调查，应用辛普森和香农指数测定了该地区不同生境类型的假臭草群落的生物多样性；并以各种杂草的重要值作为生态位计算的资源状态指标，应用Levins公式和Pianka公式计算分析了该地区假臭草群落各物种的生态位宽度和生态位重叠。
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The results showed that the Shannon-Wiener and Levins′s niche breadths of Schima khasiana,Lithocarpus hancei,Lindera fruticosa,Salix magnifica and Myrsine semiserrata tree species were 0.772,0.761,0.741,0.659,0.632 and 0.971,0.934,0.843,0.708,0.658 respectively.
结果表明：群落中生态位宽度较大的树种为印度木荷、硬斗石栎、绿叶甘橿、贡山大叶柳、针齿铁子，它们的Shannon-Wiener和Levins生态位宽度分别为0.772，0.761，0.741，0.659，0.632和0.971，0.934，0.843，0.708，0.658。
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Based on the investigation of the growth status of gardens plants with the same site conditions, the important values of populations were calculated with the software of ArcMap, the niche breadth of populations were studied using the Shannon-weinne diversity index, Levins niche breadth index and niche overlap.
通过对立地条件类型相同城市的园林绿地植物生长状况进行调查，运用ArcMap软件计算各种群的重要值；采用Shannon-weinne多样性指标、Levins生态位宽度指数和1994年黄英姿提出的生态位重叠计算公式进行种群生态位宽度的研究，将种群生态位理论运用于生态园林建设中。
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Connor Levins：康纳.莱文斯
布雷特.凯利 Brett Kelly | 康纳.莱文斯 Connor Levins | 詹姆斯.威尔逊 James Willson