群落

Based on a systematic field investigation and laboratory experiments, the structures of arthropod communities and the evalution of dominant predatory enemies in cabbage fields of different seasons were studied. The main results were as follows:1 The structures and their dynamics of arthropod communities in cabbage fields1.1 Species composition and population dynamics of each species of the arthropodcommunities in the cabbage fieldsThe research results showed that the occurrence of Pieris rapae in spring cabbage fields was relatively grave.

本文在田间系统调查和室内试验的基础上，对不同季节甘蓝田节肢动物群落结构及捕食性天敌优势种的评价进行了研究，主要结果如下：1甘蓝田节肢动物群落结构及其动态1.1节肢动物群落物种构成和各种群数量动态研究结果表明，春甘蓝田菜青虫的发生比较严重，菜青虫在调查期间种群数量呈上升趋势，5月初高峰期平均每株甘蓝接近20头；菜蚜与小菜蛾的发生相对较轻，菜蚜在5月中旬有个明显高峰。

In this study,with the psammophilous Caragana Korshinskii-Artemisia ordosica communities on semifixed dunes and fixed dunes in Shapotou region at the southeastern fringe of the Tengger Desert .

本文以腾格里沙漠东南缘的沙坡头地区半固定沙丘柠条-油蒿群落和固定沙丘柠条-油蒿群落为观测样地，选择具有不同类型生物土壤结皮分布的植被群落为观测样方。

The results of research on community structure through the response of microbes in mangrove swamp under PAHs stress revealed that different changes of microbial community structure had occurred in different concentrations of Phe, Pyr, Flu, Bap and M-PAHs.

不同浓度的PAHs对红树林沉积物中的微生物群落结构的影响不同，较高浓度的PAHs对微生物群落结构的影响也较大，同时在高浓度的PAHs胁迫下，微生物群落结构发生改变的响应时间也较短。

SPSS cluster analysis and CANOCO ordination method were applied to discuss the relationship between vegetation and its environmental factors in the west slope of Helan Mountain. The results show that the vegetation community can be divided into three types, namely Salsola passerina-Reaumuria soongorica community, Stipa breviflora-Stipa grandis community and Prunus mongolica-Ulmus glaucescens community.

通过SPSS聚类分析和CANOCO排序研究了贺兰山西坡植被分布与环境因子的关系，结果表明：在海拔梯度上，贺兰山西坡植被大致可以划分珍珠猪毛菜－红砂群落、短花针茅－大针茅群落和蒙古扁桃－灰榆群落3种类型。

The annual average density was 14.63 per hectare in saline algae zone, 7.50 per hectare in Scirpus marqueter/Scirpus triqueter zone and 1 .59 per hectare in reed zone;(4) The avian community similarity in between adjoining stages of vegetation succession was higher than that in between apart stages.

对不同季节的植被演替阶段鸟类群落相似性进一步比较发现，任何一个季节S_1和S_3的值均分别大于S_2；(5)鸟类群落的多样性与群落中优势种华东师范大学2004届硕L学位论文中文摘要所占的数量比例呈负相关。

In silvicultural regeneration treatment,the diversity of shrubs and herbages increases gradually in stage A1～A3,and the variation will continue after stage A3,further work is needed to examine the dynamic.

群落多样性是指生物群落在组成、结构、功能和动态等方面的多样化，是生物多样性各个层次中研究得最早的一个层次，其研究内容主要侧重于群落的物种组成和结构的多样性[1]。

Based on a long term(14 years) research on the primary productivity of Stipa krylovii community,the influence of seasonal distribution of precipitation on the primary productivity of the community was examined,and the influential coefficients of ten day precipitation from January to August on the primary productivity of the community were calculated using an integral regression model.

本文根据克氏针茅草原群落初级生产力连续14年的定位观测资料，分析了降水量及其季节分配对群落初级生产力年度波动的影响，并应用积分回归模型，计算出1～8月各旬降水量对群落初级生产力的影响系数。

The effects of nutrition condition on the activation of stratal microflora, especially the beneficial bacteria including hydrocarbon degrading bacteria, methaneproducing bacteria and nitrate reducing bacteria for oil recovery, were investigated on the basis of the analysis of the stratal microflora in S12 block in Shengli Oilfield.

在考察了胜利油田 S12块注入水和油井产出水中细菌群落状况的基础上，针对烃类降解菌、产甲烷菌、硝酸盐还原菌等有益于采油的细菌群落，研究了营养条件对细菌群落激活的影响。

So in this work, we focused no the following aspects: 1 The ecological effect of ephemeral resource on the rodent community; 2 The ecological isolation and coexistence mechanism for the sympatric species; 3 The effect of ecological process in a regional scale on the specie richness to investigate the community Patterns and limitation Mechanism of the desert rodents in this region, the main results and conclusions were as follows

为此，本工作立足于以下方面：（1）限制性资源对荒漠啮齿类动物群落的生态效应；（2）同域物种的生态分离与共存机制；（3）局域尺度的群落过程对区域物种丰富度的影响；对该地区的荒漠啮齿动物群落格局及其相关的制约机制进行了研究。主要研究结果和结论如下

This paper studied the distribution,flora,physiognomy,construction,regeneration and succession dynanic of Tilia mongolica forest in Wulingshan mountain and advanced measure of protecting and managing forest community.

为了加强天然林保护，在标准地调查和统计计算的基础上，分析研究了雾灵山蒙椴落叶阔叶混交林群落的分布、区系成分、外貌特点、结构特征和群落的更新演替规律，并提出了群落的经营保护措施。

I didn't watch TV last night, because it .

昨晚我没有看电视，因为电视机坏了。

Since this year, in a lot of villages of Beijing, TV of elevator liquid crystal was removed.

今年以来，在北京的很多小区里，电梯液晶电视被撤了下来。