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《China Forestry Science and Technology》 2012-01
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The ecological niche of dominant tree species in the evergreen broad-leave forest of Dexing city

YUE Jun-wei,LONG Wei,YANG Hua,LIU Guang-zheng,LIN Xiao-fan Jiangxi Academy of Forestry,Nanchang 330032,China  
Based on the plot investigation of evergreen broad-leave forests in Dexing city,the niche breadths and overlaps of thirty dominant species were measured by using a quantitative analysis method.The results showed that the largerest niche breadths were Schima superba,Lithocarpus glabra,Castanopsis eyrei and Castanopsis fargesii.However,Camellia oleifera and Photinia serrulata could only use very limited resources in the ambience of evergreen broad-leaved forests and developed to specialized species because of poor adaptability.Their niche breadths were 0.Species that niche breadths were larger had greater niche overlaps among them,such as Schima superba,Lithocarpus glabra and Castanopsis eyrei,etc.Their niche overlap values were all above 0.55.Niche overlap values of 255 species were less than 0.2,accounted for 58.6% of the total.But the species with more than 0.5 niche overlap values only took up 7.4% of the total.It was a long-term competition and adaptation among the species with small niche overlaps and weak competition,because they consumed the same resources.
【Fund】: 江西省财政林业重大专项“江西常绿阔叶林恢复重建技术”(编号:200651010302)
【CateGory Index】: S718.5
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