生态种

The sugar beet cyst nematode,Heterodera schachtii,is one of the important quarantine nematodes in China as well as in the world.

本文应用MAXENT与GARP两种生态位模型对甜菜孢囊线虫在中国的适生性进行了风险分析和预测。

A local plant Suaeda heteroptera, which widely distributed in tideland ecosystem of Shuangtaizi Estuary, Panjing city, was selected in the Liaoning province as a object to study,.

以辽宁盘锦双台子河口潮滩湿地生态系统一种常见土著植物翅碱蓬作为研究对象，分析了Cu、Zn、Pb和Cd在该植物体内的累积分布、迁移规律并对其重金属的耐性进行了初步的探讨。

The analysis of the fungal community similarity between different ecosystem-types showed that farmland soil and shelter-belt soil had the highest similarity, indicating that the soil moniliaceous hyphomycetes in this two ecosystem-types had more common species.

对不同生态类型土壤中淡色丝孢菌的相似性分析发现，农田和防护林带生境的相似性系数最大，说明这两种生境具有较多的共同物种；湿地和城市花园生境的相似性系数最小。

Twelve genera of soil moniliaceous hyphomycetes were isolated from thirty-five samples which were collected from five ecosystem-types of the middle reaches of Yarlung Zangbo River of Tibet.

从雅鲁藏布江中游地区采集土壤样品35份，主要涵盖农田、城市花园、高山草甸、湿地和防护林带五种生态类型，从中分离获得土壤淡色丝孢菌12属。

Remote econiches, such as islands, with immunologically naive potential reservoir hosts and vectors are often particularly vulnerable to an introduced virus.

遥远的生态环境，例如岛屿，由于存在易感染的潜在贮藏宿主和媒介，往往对于一种引进的病毒特别难防守。

The distribution of N-P and the moisture variation caused by incrassation of the mattic epipedon together with its relationship to pasture degradation by grazing in alpine Kobresia meadow were studied at the Haibei ecosystem research station, Chinese Academy of Sciences. From 2005 to 2007, the plot pasture was maintained with a relatively stable grazing intensity and had formed obvious differences in surface character and species component.

在中国科学院海北高寒草甸生态系统研究站地区，选择了5个自然放牧梯度、处于4种典型退化阶段的高寒嵩草草甸为研究对象，进行了土壤草毡表层加厚引起的系统氮、磷分配和水分利用的变化过程研究。

The scientific concept of development is a completely new concept of development in the history of civilization. An overall and indiscrete grasp of the relationship among human, human society and natural ecosystem is put forward, with philosophy of dialectical materialism and historical materialism.

&科学发展观&是一种人类文明史上全新的发展观，它对人、人类社会和自然生态系统的发展关系作出了全面、整体的把握，蕴含着丰富的辩证唯物主义和历史唯物主义的哲学思维。

Being a protective tillage, the no-tillage means getting rid of not only the tillage before sowing, but also the intertill after sowing, and leaving the plant residue after harvesting.

中文题名稻田自然免耕体系土壤微生物及有机质周转研究副题名外文题名 Study on the microbial characteristics and the turnover of organic matter in paddy soil under a long-term no-tillage and ridge culture 论文作者张磊导师谢德体教授魏朝富研究员学科专业土壤学研究领域\研究方向土壤生物和生态学位级别博士学位授予单位西南农业大学学位授予日期2002 论文页码总数92页关键词稻田土壤生态学土壤有机质土壤微生物免耕馆藏号BSLW /2003 /S154 /1 免耕制是一种保护性耕作制，指同一块土壤在一定年限内，不仅免除播前耕作，也免除播后中耕，作物收获后直接将作物残茬留在土壤中的耕作方式。

The coastal zone environment is an irrenewable resource,so it is important to make a comprehensive assessment of the ecogeological environment vulnerability in coastal zone and to make a reasonable decision on the coastal zone development.

海岸带环境是一种不可再生资源，为了对其进行保护性开发，对海岸带生态地质环境的脆弱性进行综合评价，并在此基础上做出合理的开发决策是非常重要的。

All these suggest that Juncus Effuses could be used as an indicator of critical value of the toxic effects of the heavy metals, Cu, Cd, Pb, Zn and As, in soil, set on the basis of the upper limit of Grade Ⅱ criteria of the State Soil Environmental Quality Standard.

通过应用综合生态环境效益法，以灯心草为指示植物可以将土壤环境质量二级标准上限值设定为土壤中5种重金属的临界毒性效应值。

The split between the two groups can hardly be papered over.

这两个团体间的分歧难以掩饰。

This approach not only encourages a greater number of responses, but minimizes the likelihood of stale groupthink.

这种做法不仅鼓励了更多的反应，而且减少跟风的可能性。