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生态位相似性比例
    The niche similarity of dominant species varied between 0 and 0.3810, and the highest one occurred between A. dioica and Cinnamomum burmanii.
    生态位相似性比例值为0~0.3810,银柴与阴香(Cinnamomum burmanii)的生态位相似性比例值最高;
    have narrow niche. Among the 24 tree species, there are 16 tree species couples whose niche similarity proportions are between 0.8- 1.0. The research will show great significance in constructing new cultivation model of Chinese fir plantation.
    24个天然阔叶树的生态位相似性比例在0.8~1.0之间的有16个树种对.本研究对建立新型的杉木栽培模式和混交林树种配置具有重要的指导意义.
    In spring soybean fields: the niche breadth index of hover flies (0.8419)and the niche overlap index of parasitic wasps to hover flies and the niche similarity index of hover flies to parasitic wasps (0.8127) were the highest among the insect enemies,respectively.
    生态位重叠指数以寄生蜂类对食蚜蝇类最高 ( 0 .1 0 1 7) ; 生态位相似性比例指数以食蚜蝇类对寄生蜂类最高( 0 .81 2 7)。
    Based on the investigating spatial structure of roots of trees and wheat in interface and nearby soil between forest belt and crops in agroforestry systems on the Loess Plateau, the niche breadth, niche overlap indexes and niche similarity ratio were calculated according to structure of absorbing roots of trees and wheat. The feature of niche in water and nutrients of trees and wheat in agroforestry systems were analyzed.
    以黄土塬区农林复合系统为对象,通过调查研究林带(杨树为主)与农作物界面附近土壤中树木和小麦根系的空间分布,利用树木吸收根和小麦根系生物量计算生态位宽度、生态重叠指数和生态位相似性比例,并据此分析林木和农作物种群在水分和养分资源轴的生态位特征。
    50% of the population_links have a niche similarity over 0.5, and the niche similarity between Sinopodophyllum hexandrum and Circaeaster agrestis is higher, which shows that their niches are more similar.
    草本植物物种的生态位相似性比例值大于 0 5的占 5 0 % ,桃儿七、星叶草、角盘兰的生态位相似性比例大 ,说明它们在该地区的生态位相似程度大 .
    On the contrary, the niche similarity among the species with small niche breadths was lower.
    而生态位宽度较小的物种,生态位相似性比例较小。
    The relationships among niche breadth,niche similarity and niche overlap were discussed.
    并对生态位宽度、生态位相似性比例以及生态位重叠关系进行了初步探讨.
 

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