species abundance

Both species number and abundance of the metazoan zooplankton were dominated by the small-sized species, and decreased with body mass, while biomass distribution had a peak in the medium size class, 4.39 μ g to 8.78 μ g.

后生浮游动物的种类和数量均是以小个体为主，并且随着体重增大逐渐减少，而生物量则在4·39~8·78μg这一中等个体体重的位置上出现峰值。

Three of the five models, Geometric series model, Overlapping niche model and Broken stick model, fitted the observed species abundance patterns well, and they are suitable for studies of both simple and complicated communities.

其中3个模型，即几何级数模型、生态位重迭模型和分割线段模型拟合效果很好，它们既适合于简单群落，又适合于复杂群落结构的研究。

The result of species-abundance indicates that forest community, there is apical or stable.

种 - 多度的结果说明,该地区森林群落形成了顶级或稳定群落.

The tide had no obviously influence on benthic community, however, mangrove had some influence on species composition and abundance of zoobenthos living in this area.

潮汐对底栖动物群落影响并不明显，红树林环境对林底的底栖动物种类组成和丰度有一定的影响；

And the sharp increases of the diatom abundance and tropic pelagic species abundance in the cores are records of the paleoclimatic cooling events of Younger Dryas ( YD) and Heinrich I ( H1).

岩芯中硅藻丰度和热带远洋种丰度的突然增加系新仙女木（YD）、海因里奇（H1）等古气候变冷事件留下的记录。

Species abundance patterns of different function layers of the same forest were similar.

森林群落不同功能层的物种多度格局相似；

The two vole species are not abundance than 99 % alike, genetically.

如就基因而言,这两个物种超过99%的部份绝无二致.

The structure of grasshopper community in different environment in Luo River region was compared using species-abundance model, diversity index, similarity analysis, principal component analysis and stepwise regression.

应用种-多度分布模型、多样性指数、相似性分析、主成分（PCA）分析及多元逐步回归等方法比较了洛河流域不同生境的蝗虫群落结构。

The species abundance distribution of fleas conformed to the lognormal distribution pattern.

蚤类群落的种多度分布服从对数正态分布。

A lognormal distribution model was used to fit the mite species abundance.

革螨种多度分布用对数正态分布模型拟合。

The indexes of importance value, species abundance and biomass about vegetation community in sand covered and loess region in Wuqi county in different time-interval are analyzed, through investigating the situation of the closed vegetational type.

通过调查吴旗县覆沙黄土区不同时段封禁造林情况，并对此地区植被群落的重要值、物种丰富度、生物量等指标进行分析研究。