生态种

The results show that there aresignificant effects of the different light intensity of UV on the OAT activities ofthe three plants, Lemna minor, Alternanthera Philoxeroides and Trapa bocornis.

试验结果表明：三种植物的CAT对不同光照强度的UV均有明显的生态效应，但其效应表现随物种而异。

The research suggests that lacustrine sedimentary testate amoebae, as an excellent indicator of environmental conditions, have valuable implications for environmental changes.

初步研究表明，有壳变形虫作为一种环境指示生物在湖泊沉积与生态演化研究中具有重要的应用价值。

Base on content of chlorophyll a and feeding type of fish and shellfish a food web methods was designed to control eutrophilication. The native freshwater bivalve,Anodonta woodiana, was selected as a filter to remove the algae in the water. The result is quite satisfied and promising.

本研究以水中叶绿素a浓度为基础，鱼类食性为辅，发现使用本土种且具有经济价值之淡水圆蚌，来作为滤除水中藻类的生态方法颇具可行性，利用藻类吸收营养盐、圆蚌食用藻类、再将圆蚌移除之方式而达到降低水库营养盐能量的目的。

Making use of nitrogen and phosphorus in high density aquacultural wastewaters is not only a low-cost and sustainable treatment technology, but can also be a source of additional income.

利用养殖废水中的N、P等营养元素进行农业生产不仅是一种低成本的生态处理技术，而且能够产生一定的经济效益，一直是本学科的前沿研究领域和国际热点。

As a kind of good material for paper manufacturing and being environmental friendly especially for salina soil, Arundo donaxl planting has good economic, environmental and social benefits, so it is planted in large-scale in many provinces such as zhejiang, Anhui, Fujian, Sichuan, Yunnan, Guangdong, Hebei, Shanxi, Shandong, Guangxi, and the planting acreage is more than 10,000,000 acres.

由于芦竹是一种优质的造纸原料，且对盐碱滩涂土壤有良好的环保作用，具有较好的经济、生态和社会效益，在我国浙江、安徽、福建、四川、云南、广东、河北、陕西、山东、广西等省种植面积达1000万亩以上。

In this thesis, research on alleviation of autotoxicity by planting mixture of Chinese fir and Broadleaf trees and developing undergrowth vegetation were also done. The results showed that Michelia macclurei and Cinnamomum camphora had positive allelopathic effect on the growth of Chinese fir saplings and developing undergrowth vegetation improved soil decline of Chinese fir plantation.

另外，论文还从植物化感作用的角度，对克服杉木人工林连栽障碍的其它生产措施，如营造混交林及人促林下植被的发育生长，进行了研究：提出了与杉木化学生态关系良好的两种伴生树种，并从化感作用角度证明人促林下植被发育有利于克服杉木人工林的连栽障碍。

Gymnorrhiza of China and the relationship between three species of Bruguiera were first studied using allozyme as genetic marker. At last, the mechanism of distribution and foundation of Avicennia marina were also studied. All of these will make certain effect on ecological genetics.

另外，对我国红树林的研究来说，在我国东南沿海对木榄这样大面积的采样和深入研究以及对木榄属三个种间的生态遗传鉴定，也是一个创新的工作。

Uses method which the field investigation sample and the indoor analysis unify, 2007-2008 years live the unicast awnless brome lawn and the awnless brome and the alfalfa interlacing in the Inner Mongolian nationality university agriculture school test farm take 2 years mix broadcast the lawn and the colleague mix broadcast the lawn as the objects of study, have studied under the different sowing seeds way the forage grass to the soil physics and chemistry nature influence, finally indicated:the change tendency which under the different sowing seeds way increases the soil bulk specific gravity overall along with the soil layer depth to present after reduces first increases, is the 10-20cm soil layer is lowest; Looking from the 0-40cm soil layer's mean value, the unicast awnless brome lawn soil bulk specific gravity is smallest, the colleague mixes broadcasts the lawn soil bulk specific gravity to be biggest.

科尔沁草原是典型的农牧交错地区，长期以来，由于不合理利用草地资源造成该区生态环境严重恶化，农牧业生产受到严重影响[1]。建立高产优质的人工草地是解决我国高寒地区草畜供求季节不平衡的矛盾，促进草地畜牧业持续发展的关键措施之一[ 2]。无芒雀麦和紫花苜蓿都是营养价值高、适口性好、抗寒抗旱能力强的多年生牧草。将这两种牧草混播不仅能提高牧草产量和品质，延长草地使用年限，还能改善牧草的营养，提高牧草的适口性，有利于调制和青贮[3]。

This paper reviews predecessors' understanding on ecotone between agriculture and animal husbandry,introduces the concept applied in northern China and regional boundaries of the ecotone,and points out that zonal and azonal geographic factors are accountable for the interlocking characteristics of farming and animal husbandry in landuse patterns.

在综述了前人对农牧交错带的认识后，给出中国北方农牧交错带的概念和区域界线；认为土地利用结构的农牧交错性是地带性与非地带性双重影响的结果，其空间格局有6种区域组合类型；随着人口负荷的加大，调整土地利用结构是保证这一地带生态安全与粮食安全的基本出路。

Microbialites represent a particular ecosystem, composing of cyanobacteria and other benthonic organisms.

微生物岩所代表的是一种以蓝细菌和其他底栖生物为主体的独特的生态系。

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。