查询词典 ecosystems

The leaching and transferring of 95Zr in different soils and its actions in several aquatic and terraneous ecosystems were studied by using the isotope tracer techniques.

本文采用同位素示踪技术研究了~(95)Zr在不同土壤中的淋溶、迁移和在几种水生及陆生生态系统中的行为，为探明~(95)Zr在不同农业生态环境中的行为规律提供基础资料，对制定有关安全标准和污染治理提供了科学依据。

Irrespective of the fact that considerable disagreements remain on the character, composition and classification of DOM in terrene ecosystems, research has nonetheless proven that DOM is an active and important chemical component of natural systems.

尽管目前对于陆地生态系统中DOM的研究尚不完善，对其性质、组成和分类方法等问题的看法还没有达成一致，但现有研究结果已经表明DOM是一种十分活跃的重要化学组分。

The result showed that:(1) the unrenewable industrial assistance emergy were mainly in the region of farming eco-economic system, and the chemical fertilizers greater impacted on agriculture output;(2) the intensity of emergy use was higher than the national average on agriculture, which indicated that there were a higher levels of investment in science and technology in the region;(3) the net output rate of emergy in the planting economic ecosystem was higher than the level of the national average and developed regions of guangdong province, which showed that the system had higher economic vitality, and the better function of agricultural system, more efficient operation, higher returns of emergy;(4) the rate of environmental loading was a lower level, which indicated that agricultural production had less pressure on the entire regional ecosystems, and caused less damage to the ecological environment, and agriculture, environmental resources for further development and utilization;(5) the sustainable development index in yanqi basin indicated that farming systems in the region belonged to sustainable development areas.

结果表明：(1)焉耆盆地绿洲2006种植业生态经济系统的能值投入以不可更新的工业辅助能为主。在不可更新工业辅助能中，化肥对农业的产出影响较大；(2)该区域的能值利用强度高于全国平均水平，说明农业的科技投入水平较高；(3)系统的净能值产出率高于全国平均水平和发达地区水平，表明系统具有较高的经济活力，农业系统整体功能较好，运转效率较高，能值回报率较高；(4)农业生产对整个区域生态系统的压力较轻，引起的生态环境破坏较小，农业环境资源还有进一步开发利用的潜力；(5)焉耆盆地种植业系统具有可持续发展的潜力。

This wab page is an extract of a script that is part of the video series "The Living Landscape-an Australian Ecosystems Series".

该网页就是电视系列手稿的部分摘录&活的风景-澳大利亚生态系列&

Environmentalists were worried that the hydrological ecosystem in Taiwan might be the most affected among other wildling ecosystems for the typhoon directly caused gigantic changes to rivers.

环保人士还指出，此次风灾大幅改变当地水文，冲击最大的可能是台湾河川生态系。

Zonal vegetation and vertical zonality of vegetation could be referred as suitable ecosystems during the restoration.

应避免密度过大的人工林&岛屿&现象发生，尽力恢复区域固有的植物多样性，这样，所恢复的人工林才属于健康的人工群落。

The results show that the number of zoobenthos species declines in rice-duck farming ecosystems compared with conventional paddy.

结果表明：与常规稻田相比，稻鸭共作使水体底栖动物的种类数减少。

Zoobenthos are one of the major ecological groups in fresh waters. They play an important role in nutrient cycling and energy flow in ecosystems, and are very useful food resources for fish.

底栖动物是淡水生态系统的一个主要组成部分，在渔业和环境科学上均有重要的理论意义和广泛的应用前景。

The effects of different types of aquaculture on lake ecosystems were studied by monitoring plankton, zoobenthos ,aquatic plants and water quality in 60 lakes in Suzhou City.

通过对苏州市60个湖泊的浮游生物、底栖动物、水生植物及水质的监测，分析不同养殖方式下湖泊生态系统的差异。

Shannon-Wiener diversity index, Simpson diversity index and evenness index all show similar trend of change. The diversity indexes and evenness index of zoobenthos in rice-duck farming ecosystems are higher than those in normal paddy during the early stage of rice growth, but are in the reverse trend during the later stage.

水稻各生育时期常规稻田和稻鸭共作稻田底栖动物的Shannon-Wiener多样性指数、Simpson多样性指数和Pielou均匀度指数变化趋势相似，均为水稻生育前期稻鸭共作稻田的生物多样性指数和均匀度指数高于常规稻田，而后期低于常规稻田。

It was just a normal day of school

那只是上学的普通一天

Which is a very good reference in this issue.

这是一个在这个问题上很好的参考。