species richness

The louse communities on small mammal hosts are quite simple with lower species richness and diversity and with a high dominance index.

各小兽宿主体表吸虱群落简单，物种丰富度和生物多样性均很低，大多数优势虱种的相对优势度很高，优势种地位突出。

Very few showed significant declines in species richness with distance froms ubplot boundaries.

很少(块草地)显示随着边界距离的增加引起明显的品种数量的减少.

No significant correlation was observed between species richness and latitudinal or longitudinal variations.

物种丰富度与纬度变幅、经度变幅之间不存在显著的（偏）相关性。

The influence of plant N/ P, soil pH value on wetland plant species richness was studied through artificial control simulating test.

通过人工控制模拟试验，研究了植物中全氮与全磷之比（植物N/P）和土壤pH值与湿地植物物种丰富度的关系。

And the higher the species richness, landform presents heterogeneity and the fewer thethe surface roughness.

而物种丰富度越高, 地貌形态异质性增强,并且踏头数目越少,地表糙度越大.

In the process of secondary succession from conifer-broadleaf forest to broadleaf forest , species richness fluctuated remarkably.

在针阔混交林向阔叶林演替过程中, 物种丰富度指数表现为较大的波动性.

The flower-visiting hoverfly abundance at the low site is higher than that of the high site, while the species richness is lower than that at the high site.

低海拔样地访花食蚜蝇的多度高于高海拔样地，而物种丰富度低于高海拔样地；

Species diversity analysis adopts species richness and Shannon-Wiener Index.

采用丰富度和多样性指数进行群落物种多样性分析。

Along with the restoration stages, the dominance index decreased while the species richness index, evenness index and Shannon-Wiener diversity index increased gradually and come to the highest value in the plots after 32-year restoration.

土壤种子库物种多样性的变化表现为，随着演替的进行，优势度指数逐渐减小，而丰富度指数、均匀性指数和Shannon-Wiener多样性指数逐渐增大，恢复到32年时达到最大。

Then, the relationship between between species diversities and growth form in 20 plant plots was studied, the conclusion is that species richness of herb stratum is higher than tree stratum and shrub stratum obviously, tree stratum is lowest;

对20个乔木样地的植物生长型与物种多样性关系分析表明：草木层的物种丰富度指数明显高于灌木层和乔木层，乔木层最低；

Statistical analysis of DGGE profiles showed that, with the reaction, bacterial species richness gradually increased, and the similarity of the two adjacent period increases.

对DGGE图谱的统计分析表明，随反应的进行，细菌种群丰富度逐渐增加，且相邻两时期的相似性逐渐增大。

Both the species richness index and diversity index of the community were low.

群落物种丰富度和多样性指数低.

Based on the ANOVA, the influences of fire disturbance upon the species richness and species diversity of the shrub, herbivore and whole underlayer are very significant, however, the effects on the evenness indices are not obvious.

火干扰对下木层、草本层和下层总体的物种丰富度和物种多样性有显著影响，而对均匀度的影响不显著。

Increasing both species richness and species evenness would lead to a high degree of temporal niche partition in Inner Mongolia steppe. 3.

在内蒙古针茅草原群落中，物种丰富度和均匀度的增加都可以导致时间生态位的分化程度的提高。

Both aboveground biomass and belowground biomass decreased with species richness increase and inclined to negative relationships.

植物的地上和地下生物量都随着丰富度的增加而减少，倾向于负相关关系。

But it looks as though their species richness is caused by the same underlying mechanism.

但看上去,它们的物种丰富性是由同一种潜在的生物机制所产生的.

MaxEnt was not always effective and was inclined to give an upper limit of species richness estimated in a single area.

最大熵方法并不总是有效的，它倾向于给出一个地区物种丰富度的上限值。

The mainly investigated contents were as follows: ( 1) Species diversity analysis: Species richness, Brillouin index of species diversity and even degree.

主要研究内容包括：①植物物种多样性：不同植被群落的物种丰富度（S）、多样性指数（H）和均匀度（J）；

The undergrowth vegetation species diversity index of Simpson index, Pielou evenness index and species richness index are all improved after the management measures take in to implementation.

封禁后各项经营措施下的林下植被的Simpson物种多样性指数、Pielou均匀度指数和物种丰富度指数都有所提高。

Prediction of the spatial patterns of species richness based on the plant-topography relationship: An application of GAMs approach

基于植物-地形关系的物种丰富度空间格局预测&GAMs途径的一种应用

Boletaceae ranked the second in species richness and made up 19.43% ( 41 species) of the total species.

牛肝菌科（Boletaceae）占第二位，有41种，占总种数的19.43%。

The canopy, mean height and mean breast diameter of tree layer raised step by step, but the species richness and diversity of communities lowed progressively along with community succession;

森林采伐后随着顺行演替的进行，乔木层郁闭度、平均树高和胸径逐渐增长，群落的物种丰富度和多样性指数逐渐降低。

There was no significant correlation between plant species richness and plant biomass in the mixed nitrogen treatments of nitrate and ammonium.

硝铵混合营养下植物物种丰富度与植物生物量之间没有显著相关性。

Distribution pattern of tree species richness along an altitudinal gradient in Kanas of Xinjiang

新疆喀纳斯树种丰富度垂直格局特征

The spatial-temporal variation of species diversity has significant influence on the MaxEnt method to estimate species richness.

结果表明，物种多样性的时空异质性对于估计物种丰富度的最大熵方法有比较明显的影响。

Previously, most researches on the spatial-temporal heterogeneity of species richness were carried out at large regional or global scales, while seldom researches were carried out at small or local scales.

以往对物种多样性时空分异规律的研究大都是在全球或很大区域空间尺度上进行的，在小区域或局域尺度上开展的研究很少。

The influence of plant N/ P, soil pH value on wetland plant species richness

植物N/P与土壤pH值对湿地植物物种丰富度的影响

Since the grazing land fenced from 6 to 10 years, the relationship between belowground biomass and species richness had significant positive lineal correlation.

放牧地围封禁牧6～10年后，地下生物量与物种丰富度呈显著线性正相关。

Species richness was generally low in all shrub communities.

各类灌丛之间物种丰富度指数相差不大.

Altitudinal pattern of species richness of tree and effect of natural fire disturbance in Kanas Tourism District, Xinjiang

新疆喀纳斯旅游区树种多样性垂直格局与自然火干扰