1) tree population
乔木种群
1.
Based on a 2×2 contingency table,interspecific association of 13 main tree populations of the montane elfin forest in shimentai Nature Reserve,Guangdong Province,was studied using variance ratio(VR),~2 text,association coefficient(AC),percentage of co-occurrence(PC),and Pearson r correlation coefficient.
结果表明:13个乔木种群总体呈不显著的负联结;78对种对中,绝大多数种对联结关系未达到显著水平,种对间的独立性相对较强,相关性较弱,只有15对种对存在较强的相关性,这些可能与群落目前所处的阶段和特殊的生境条件有关。
2.
Using the methods of t-test of s~(2) ratio,negative binomial parameter K,mean crowding index,patchiness index,Morisita index and the method of nearest neighbor,the spacial distribution patterns of the main tree populations in montane forest in Caiyanghe nature reserve were studied.
采用方差/均值比的t检验法、负二项式分布指数K、平均拥挤度m、聚块性指数m x、丛生指标I、Morisita指数及最近邻体法对菜阳河自然保护区山地雨林的优势乔木种群的分布格局进行了研究。
3.
The niche breadths and overlaps of 20 main tree populations in the evergreen broad-leaved forest in Simian Mountain, were measured by using the formulas described by Levins ,Hurlbert and PianKa ,and the relationships among niche breadth, niche overlap and interspecific association were discussed in this paper.
利用Levins、Hurlbert生态位宽度公式和Pianka生态位重叠公式测定四面山常绿阔叶林20个主要乔木种群的生态位宽度和生态重叠,并对生态宽度、生态位重叠以及种间联结性的关系进行初步探讨。
2) tree species
乔木树种
1.
Emission characteristics of biogenic volatile organic compounds from four tree species in Shenyang,China
沈阳市四种乔木树种BVOCs排放特征
4) durisilvae
硬叶乔木群落
5) conisilvae
针叶乔木群落
6) Arborous species diversity
乔木种多样性
补充资料：种群增长率(见种群出生率)
种群增长率(见种群出生率)
种群增长率见种群出生率。
说明：补充资料仅用于学习参考，请勿用于其它任何用途。
参考词条