群落

Dental plaque bacterial flora denaturing gradient gel electrophoresis Streptococci , oral CEPS

牙菌斑，细菌群落，变性梯度凝胶电泳，链球菌，口腔

Chamaenerion angustifolium, a dominant species in the meadow community of the study site, is observed with high level of colonization by arbscular mycorrhizal fungi.

柳兰是调查区草甸群落中的优势种，在该次调查中表现出较高的侵染程度。

Wanfenghu reservoir has been polluted seriously, and waters are in a severe eutrophication condition. Whether physico-chemical indexes or biological indexes appraisal, it proved that the water quality of Wanfenghu is between IV-V. Wanfenghu contains high TN and TP which are 5 to 6 times of the national standard content, and the quantities construction of phytoplankton communities is deeply disequilibrium, the Cyanophyta and Charophyta occupying overwhelming

万峰湖水库已经受到了严重污染，水体处于严重富营养化状态，其水体中的溶解氧的三季变化范围在2.92-5.3mg·L之间、化学耗氧量三季平均值为34.77 mg·L~(-1)、总氮三季平均值为2.5 mg·L~(-1)、总磷的三季平均值为0.35 mg·L~(-1)、叶绿素a含量的三季平均值为23.64 mg·m~(-3)，以上各指标表明万峰湖水库水体处于Ⅳ-Ⅴ类水质；无论从浮游植物的群落数量上还是浮游植物种类组成上看，蓝藻和绿藻都占绝对优势，而其它各种藻类极少，是典型的蓝-绿藻型水

The results showed that the community structure of macrozoobenthos was very simple. The main dominant species are Chironomus plumosus and Limnodrilus udekemianus.

结果表明，盐碱池塘底栖动物群落结构简单，主要优势种是羽摇蚊幼虫和奥特开水丝蚓。

It was shown that the algal species composition and cell densities in the reservoir varied markedly among the three periods. At present, the algal community in mainstream was dominated by Bacillariophyta, and then Chlorophyceae.

数据显示，蓄水前（2003年1月~2003年6月）、蓄水1周年（2003年6月~2004年5月）和蓄水1.5年（2004年6月~2004年12月）3个时间段之间，被调查水域的浮游藻类群落结构、细胞密度和水质状况均存在一定的差异。

Ciliata var. pubescens natural forest should be strengthened and attention should be paid to collect and protect genetic resources and cultivate plantation.

针对毛红椿天然林群落现状，为加强对其保护，应积极开展毛红椿遗传资源收集、保存和培育。

The community structure and species diversity of Toona ciliata var. pubescens natural forest were investigated. The results showed that there were abundant species diversity in T. ciliata var.

对毛红椿天然林群落结构和物种多样性进行调查分析，旨在为保护毛红椿天然林和推广人工造林提供理论依据。

Microbial community biota monitoring-PFU was used to investigate the miniature biological population- Ciliata , as the main research object in the aeration tank in Yan'erwan Wastewater Treatment Plant in Lanzhou.

在兰州雁儿湾污水处理厂采用微型生物群落监测方法——PFU法，以曝气池微型生物种群——纤毛虫类为研究对象，通过PFU监测及同期BOD5检测，发现污水处理厂曝气池纤毛虫物种丰富，以钟虫等固着缘毛目类为优势类群。

Plant community ; life form biological type ; layering ; horizontal distribution ; seasonal aspect of community ; succession ; prima succession ; second succession ; clima

植物群落；生活型；成层现象；水平分布；群落季相；演替；初级演替；次级演替；顶极

A biome is "climatically and geographically defined areas of ecologically similar climatic conditions such as communities of plants, animals, and soil organisms."

生物群落是指&类似于气候条件的气候和地理的生态环境，象植物，动物和土壤生物的共同体&。

The concept of equivalent rotationally rigidity is offered and the formula of rotationally rigidity is obtained.

主要做了如下几个方面的工作：对伸臂位于顶部的单层框架—筒体模型进行分析，提出了等效转动约束的概念和转动约束刚度的表达式。

Male cats normally do not need aftercare with the exception of the night after the anesthetic.

男猫通常不需要善后除了晚上的麻醉。