生态

As the "world's third polar", the Qinghai-Tibet Plateau is a complex and unique system.

作为"世界第三极"的青藏高原，高寒生态系统是青藏高原主要的生态系统之一。

By using the TM images in 1997,2001 and the spatial analysis methods of remote sensing and investigated by quadrat,the dynamic change of vegetation,land use and soil erosion in the "Shan-Gan-Ning air mass to Yinchuan" natural gas pipeline project region during the period from 1997 to 2001 are analyzed.

基于在中国西北生态脆弱区天然气管线建设的工程实例，利用夏季陆地卫星图像为基本信息源，应用遥感解译分析、野外样方调查等方法，以植被类型、土地利用、土壤侵蚀为基本评价因子，对天然气管线建设前、后项目区的生态环境变化进行了分析研究。

But railroading should effect and destroy the environment of Southwest , and especially tender environment.

但铁路建设活动必将对西南地区的环境，特别是脆弱的生态环境产生影响和破坏，甚至会给原本就很脆弱的生态环境带来新的灾难。

Species-pairs were positive correlation,including 10 species-pairs were higher significant positive correlation and 24 speciespairs were significant positive correlation, and 263 species-pairs were negative correlation, including 8 species-pairs were higher significant negative correlation and 28 species-pairs were significant negative correlation, which were tested by Spearman＇ s rank correlation coefficient.

正负相关比为0.7643，显著种对占总对数的15.05%，群落优势种种间多呈不显著关联。2）按照31个建群种和优势种对环境的适应方式和主导生态因素，它们被划分为2个生态种组：芦苇组和早熟禾组。3）关帝山撂荒地植物群落以退耕还林的先锋物种为主，表明植物群落处于森林植被恢复的初期演替阶段。

It varies with time, rareness and social attribute of the resources. So, the value of coefficient K shall be adjusted according to the change of environmental resources with time, location and changing of social environment.

生态环境资源具有时间性、稀缺性和社会属性等特点，因此，K值反映生态环境资源随时间、地点和社会环境的变化。

The plan comprises developmental renovation, engineering renovation, landscape reconstruction, reafforestation and ecological restoration.

结合实际情况，提出了废弃采石场生态与景观恢复的具体方案，包括开发性治理、工程整治、景观再造、绿化与生态恢复。

It is also an effective way to protect and reconstruct eco-environment,which can bring about better economic,social and ecological benefits.

It也是一种有效的方式来保护和重建生态环境，这可以带来更好的经济，社会和生态效益。

First, make the people who live in a worse environment move to a region with the better environment, and form a new town. So the environment there can be reconvert.

其次，大力发展适合当地资源状况与市场需求的农副产品加工龙头企业，以及高新技术农业和以生态治理、环境保护为目的的高新技术产业，建立一系列能够带动当地经济发展与生态建设的龙头企业。

Several even ts,that affect genetic variation during ecological restoration,such as sampling error and small population size (bottleneck or founding event and subsequent inb reeding and genetic drift),were extensively discussed.

分析 了生态恢复过程中影响种群遗传变异的因素，主要有取样误差和小种群效应(主要是瓶颈或建立者事件及其以后的近交和漂变)；在进行生态恢复时也要考虑局部适应，对影响种群局部适应的因素也进行了分析。

The CCFG is a kind of economical activity with positive externality, its final products offered -the ecological benefits belong to the pure public goods, the nature of the economical compensation is to internalize the externality of the CCFG, so an economical compensation mechanism should be established with the government playing a leading role. The compensation receivers should be not only peasant households but also the county-level authority that performs the project. Besides central government, the compensation payers should still include the provincial-level governments who implement the project, the provincial-level governments of those beneficiary areas of midstream and downstream of basin, international organizations, enterprises and individuals, etc. Multiple channels of raising funds for the program should be worked out and the practice method should be transformed. Thediversified compensation ways should be chosen. In reality, insufficient compensation is the normality, the cost compensation may have more maneuverability. The decision-maker should carry on proper adjustment to the compensation standard, taking into account the factors about the environment conditions, the social-economic conditions, the ecological function of vegetation, etc. and make out different compensation criterions for different areas and different levels. The author puts forward it should be kept the policy of financial subsidies to the farmers who reforest ecological forest for a long term, should prolong the compensation time frameworks to the farmers who reforest economical forest.

本文认为，退耕还林还草是一项具有正外部性的经济活动，其提供的最终产品—生态效益属典型公共产品，经济补偿的实质就是要实现这种外部性的内部化，故应构建以政府为主导的经济补偿机制；补偿对象除了退耕农户以外，还应包括实施退耕还林还草的县级政府；补偿主体除中央政府外，还需将退耕地区省级政府、流域中下游受益地区的省级政府、国际社会、企业和个人等纳入其中；多渠道筹措退耕还林还草补偿投入资金，切实转变经济补偿的运作方式；选择相互协调、相互补充的多样化补偿方式；现实中，不充分补偿是常态，实行成本补偿更具可操作性；应对补偿标准进行适当调整，在综合考虑退耕地区自然环境条件、社会经济状况以及林草植被的生态功能等多种因素的基础上，制定分区分级补偿标准：对还生态林应采取长期补偿政策，对还经济林也要适当延长补偿年限。

Neither the killing of Mr Zarqawi nor any breakthrough on the political front will stop the insurgency and the fratricidal murders in their tracks.

在对危险的南部地区访问时，他斥责什叶派民兵领导人对中央集权的挑衅行为。

In fact,I've got him on the satellite mobile right now.

实际上 我们已接通卫星可视电话了