查询词典 ecosystem

The bark beetle species on Pinus armandi and their niches were studied in the middle areas of Qinling Mountains. The results showed that 19 species of bark beetles infecting and damaging Pinus armandi in pine ecosystem of Qinling Mountains were found, but only 11 species of them could be competitive and coexistent one another.

通过对秦岭林区海拔1600-2200m的中山地带华山松小蠹虫种类和生态位的研究，结果表明：在秦岭林区入侵危害寄主华山松的小蠹虫有19种，其中能构成竞争和共存的小蠹虫主要有11种。

The envioronmental impact of the drought comprises the basification of the soil and groundwater's salt, surging pollution of the freshwater ecosystem ,the regional extinction of the animal speices.

干旱造成的环境影响有土壤和地下水的盐碱化、淡水生态系统污染加剧、动物品种的区域性灭绝等。

These trends were found to be indicative of increasing pressure on available land resources, leading to extensive significant for the development of land management policies, and for the monitoring of ecosystem status and trend.

研究有助于理解后备资源短缺下的土地资源压力，对制定合适的土地管理时间策略，监测生态系统状况和态势具有重要意义。

Stress or disturbance can be regarded as not only be a normal phenomena for the ecosystems, but also be regarded as indispensable ecological characteristic for all level of ecosystem.

对于中尺度生态系统健康纵向上的定量化"健康"评价研究的主要瓶颈在于找到"健康"生态系统的标准。

In the ecosystem civilization construction process, will produce the new benefits conflict and bene fitssne cessarily.

在生态文明建设过程中，必将产生新的利益冲突和利益博弈。

The benthos resource function in ecosystem of the Yangtze River Estuary was primarily discussed and we estimated and calculated their products value for the first time.

本文还对底栖动物在长江河口湿地生态系统中的资源功能做出了初步探讨，并首次估算出其物质产品价值。

The biomanipulation of silver carp and bighead carp in poly-culture was better than that of individual culture, especially in the ecosystem of predominant silver carp.

滤食性的鲢、鳙鱼混养比单养更具有生物操纵能力，其中在鲢鱼的放养比例占优势的系统中对浮游生物的抑制作用更为明显。

With theoretical introduction and example analysis, the relationship between the living beings and it's environment could be elucidated at the level of individual, population, biocoenosis, ecosystem, and biosphere, respectively, aiming at making the students have the capability to grasp the fundamental knowledge system of ecology and ecological ideology, and improving the understanding of the environment problem.

本课程主要从个体，种群，群落，生态系统和生物圈等不同层次上分析生物与环境之间的关系方式，通过理论推介，案例剖析，使学生掌握生态学的基本知识体系和思想方法，形成宏观的生态思维，提高对当前资源和环境问题的认识能力和把握水平。

Ecosystem element balance has been a main focus of global change ecology and biogeochemical cycle research.

生态系统元素平衡是当前全球变化生态学和生物地球化学循环的研究热点和焦点。

Soil microbes are the important components of soil ecosystem, exhibiting the important role in biogeochemical cycle. They are very sensitive to the changes of soil environments.

土壤微生物是土壤生态系统的重要组分，在生物地球化学循环过程中有重要的作用，对土壤环境变化和胁迫的反应十分灵敏。

He became prime minister in 1997 and won international acclaim for his role in the Northern Ireland peace process.

他在1997年成为总理，并且因为在北爱尔兰的和平进程中发挥的作用受到国际社会的赞许。

Mixed Page Sorting Method Using the cuttable user model, this thesis proposes a mixed page sorting method by using cutted user model in server-side and complete user model in client-side.

隐私分级利用的混合式页面排序方法针对个性化搜索中搜索结果排序的问题，本文利用隐私可控开放的用户偏好模型，提出一个在客户端和服务器端分步进行的隐私分级利用的混合式页面排序方法。