查询词典 species diversity

Since fanwort has a different ecological niche than other aquatic weeds such as alligator alternanthera and common water hyacinth, which could imply "joint" impact on native species diversity, further biological and ecological investigations of fanwort are urgently needed.

由于水盾草为罕见的外来沉水杂草，可与其他水生杂草对本地的生物多样性产生"联合"影响，因而迫切需要对其进行深入的研究。

In this paper, species diversity, community structure and feeding ecology of heterotrophic flagellate were summarized.

异养鞭毛虫物种多样性及生态学方面的系统研究将有助于对水生态系统结构、功能和过程深入了解。

During restoration experiment, several functional and structural parameters (number of species, diversity index, percentage of phytomastigophora, community pollution value, heterotrophy index, similarity index between communities) were determined weekly.

在修复实验过程中，定期测定微型生物群落的各种结构和功能参数（种类数，多样性指数，植鞭毛虫百分比，群落污染值，异养性指数，群落结构的相似性指数），通过它们的变动机制和规律，再现了修复过程中微型生物群落的演替过程。

Species diversity in the intertidal is strongly affected by predation and other disturbances.

在该潮间带多样性是强捕食和其它障碍的影响。

The community of Liriodendron chinense in Sandaokeng Nature Reserve in Hunan Province was investigated using several species diversity indices.

采用5个物种多样性指数对湖南三道坑自然保护区珍稀濒危植物鹅掌楸（Liriodendron chinense

This study was carried out in collective-owned summer grassland in Ganchaitan, which is located at the south foot of eastern Lenglongling Mountain (a branch of north Qilian Mountain), with yak and Tibetan sheep miscellaneously grazed on it. The grassland type could be classified as alpine meadow, dominated by Potentilla froticosa shrub. This study, under grads grazing stress, focused on the community structure, composition, species diversity, above-ground biomass of PFS, by using pane net sampling based on spatial distribution in stead of temporal succession. Results showed that: Grazing stress negatively related to the distance between grazing area and resident area.

以祁连山北支冷龙岭东段南麓的甘柴滩夏季牧场集体长期混合放牧的高寒金露梅Potentilla froticosa灌丛草场为对象，利用空间分布代替时间演替的方法，采用方格网法取样分析调查，对不同放牧压力梯度下金露梅灌丛群落的结构、组成、物种多样性、地上生物量进行研究，结果表明：①放牧居住点由远到近，放牧压力梯度不断增加，金露梅株高、密度、覆盖度、地上生物量和丛间草地的地上生物量均有不同程度的降低，地上的总生物量降低幅度达84.77%。

However, few studies have been conducted on the mechanism of altitudinal species diversity patterns in the montane forest communities.

研究深度也从根据样地资料的简单描述和分析，发展为山地森林群落物种多样性机理假说的提出与证实，尚未见有关山地森林群落物种多样性垂直格局机理的报道。

Mud flat of mangrove, benthic macrofauna, biomass, species diversity

中文关键字：红树林滩涂，大型底栖动物，生物量，多样性

Objective］ With Hippophae and Elaeagnus root nodules as research objects, the species diversity of nitrogen-fixing actinomycetes was studied.

［目的］以沙棘和沙枣根瘤为研究对象，深入研究固氮放线菌物种的多样性。

The species diversity of different gangue piles at northern slope in Sunjiawan was studied with field investigation and statistical analysis.

采用野外调查和统计分析相结合的方法，对孙家湾矸石山阴坡不同排砰年限地段物种多样性进行研究。

On the other hand, the more important thing is because the urban housing is a kind of heterogeneity products.

另一方面，更重要的是由于城市住房是一种异质性产品。

Climate histogram is the fall that collects place measure calm value, cent serves as cross axle for a few equal interval, the area that the frequency that the value appears according to place is accumulated and becomes will be determined inside each interval, discharge the graph that rise with post, also be called histogram.

气候直方图是将所收集的降水量测定值，分为几个相等的区间作为横轴，并将各区间内所测定值依所出现的次数累积而成的面积，用柱子排起来的图形，也叫做柱状图。