物种丰度

本研究对了解物种丰度和N对P的相对可利用性、N与Ca，以及P与Ca的化学计量之间关系具有重要意义。

This paper will be useful for studying the relationship between species richness and N to P relative availability , and N and Ca , P and Ca stoichiometry .

底栖动物的密度和物种丰度在鸻鹬类南北迁徙时期均没有显著差异。

No significant differences were found in macrobenthos density and species richness for the northward and southward migration .

生态边界特殊性、异质性和不稳定性，具有较高的物种丰度和第一性生产力等等。

The particularity , heterogeneity and instability of ecosystem border-domain provide it with higher species abundance and productivity etc.

研究显示，南北迁徙期间记录到的鸻鹬类种类数接近，但在不同栖息地鸻鹬类的多度和物种丰度存在显著差异。

The study showed that species numbers recorded in both migrations periods were almost no difference , but species richness and abundance in different habitats exhibited significant difference .

怀九河源头的物种丰度和硅藻多度均最大，洞台、黄坎丝状蓝藻占优势，怀柔水库绿藻占优势；

The headwaters of Huaijiuhe River have highest species abundance and the highest diatom density , filamentous blue algae dominate in Dongtai and Huangkan , and green algae dominate in Huairou Reservoir ;

最后，完成一套具备有害生物潜在分布风险分析、生物物种丰度分析、制约因素分析、环境因素对比分析等功能的分析平台，同时在国内生物分布预测软件开发方面实现突破。

Finally , we completed a set of distribution prediction software as a platform , which was provided with functions such as potential distribution risk analysis , species richness analysis , constraints analysis , comparative analysis of environmental factors .

结果表明，汉江中下游江段浮游甲壳动物的密度分布呈现出中游高于下游的特征，而物种丰度和群落多样性指数则是下游高于中游；

The results were summarized as followings : ( a ) the density of planktonic crustacea in middle reach was higher than that in the lower reach whereas the species abundance and community diversity index in the lower reach were higher than that in the middle reach ;

北部湾海域浮游介形类物种组成、丰度分布及多样性

Species composition , abundance distribution and diversity of Planktonic Ostracoda in the Beibu Gulf

群落物种数量、丰度、丰富度指数、均匀度指数和多样性指数，在夏季最高，春季和秋季次之，冬季最低。

Species number , abundance and diversity peaked in Summer , were lower in Spring and Autumn , and were least in Winter .

将沼泽种子库和植被繁殖体库与枯水期和丰水期的植被类型的物种组成和丰度进行比较。

The species composition and abundance of both the marsh seed bank and the vegetative propagule bank were compared with those of the drawdown and flooded vegetation types .

通过物种的数量和丰度分析表明，真菌物种多样性最大的是九溪。

The highest species diversity was recorded in a stream at Nine Creeks analyzed with parameters of number of species and abundance .