查询词典 ecosystem

Flaveria bidentis,a potential exotic invasive weed to agro-ecosystem and rangeland ecosystem,has recently invaded Tianjin City and Hebei Provincein North China,and is spreading further.

菊科黄菊属植物黄顶菊近年出现在我国华北地区天津市和河北省的衡水、廊坊等地，其入侵范围有不断扩大的趋势。黄顶菊是一种入侵性极高的一年生杂草，对农牧业生态系统有极大的破坏性。

Elaborated the city greenly the ecosystem characteristic of the system and constuct the principle, and put forward the city greenly ecosystem counterplan of system programming and construction.

阐述了城市绿地系统的生态特征与建设原则，并提出了城市绿地系统规划与建设的生态对策。城市绿地系统；规划；建设；生态对策

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。

Leucaena leucocephala plantation, as pioneer species in the initial stage of ecosystem restoration, improves microenvironment of ecosystem, and creates favorable conditions for post species to intrude and colonize.

新银合欢作为生态恢复初期的先锋树种明显改善了生态系统的微环境，为后继种的入侵和定居创造了条件。

Research on the symbiosis ecosystem of Lolium multiform Lam. and tilapia showed that the largest load was 2159. 66gm〓, and the best quality of fish and grass was 0.222. The ecosystem would destroy when the load was more.

通过多花黑麦草和罗非鱼的共生系统研究发现，投饵养鱼的最大负荷力为2159.66gm〓，而最佳鱼草质量比为0.222，超过了该负荷力，生态系统将会崩溃。

The spatial planning on the watershed may help implementing ecosystem management. The related concepts applied in the planning included the model, advocated by Odum regarding the environments that human need, ecosystem classification, landscape ecology and ecological integrity, etc.

本研究的流域空间规划能帮助生态系统管理的实行，而规划所用的观念，包括：Odum提出的四种人类需求环境模型、生态系统分类、地景生态学以及生态完整性等。

Based on having read a great deal of literatures about economic threshold, the authors pointed out the necessity and importance for applying the method of economic threshold in the studies of Phyllostachys pubescens ecosystem in this paper, and the authors also put forward the concept of economic threshold of Phyllostachys pubescens ecosystem and its research frame and some problems which should be pay attention to.

摘 要：在阅读大量有关经济阈值研究文献的基础上，创新地把经济阈值与毛竹林的科学研究结合起来，指出在毛竹林生态系统研究中，应用经济阈值研究手段与方法的必要性和重要性，并提出毛竹林生态系统经济阈值的概念、研究框架及其注意的一些问题，为毛竹林优化经营和丰产培育提供新的思路与技术。

Base of it, the relationship between ecosystem and factors mentioned above is discussed and the frame for downstream riverine ecosystem model is presented.

这是河流动力学与河流生态学相融合的初步尝试。

The results showed that the value of the district was the highest, which is 2.6 × 10^7 yuan RMB, when the areas of the ecosystem and prawn pond are 25.4 km^2 and 9.6 km^2 respectively. And that is recommended that ideal Spartina alterniflora/ pond ratios should not exceed 27% of the ecosystem area converted to ponds.

研究结果里示，当互花来草盐沼生态系统面积为25.4平方公里、对虾养殖面积为9.6平方公里，即对互花米草盐沼生态系统的开发面积不超过其总面积的27%时，可实现该区域资源价值的最大化，其评估值最高，为2 626.7万元。

For reflecting a basic circumstance of the forest resources management and the ecosystem variety completely, monitoring of the forest health condition strengtheningly, and realizing the comprehensive evaluation of the forest resources and the ecosystem condition,it is necessary to building up an efficient, convenient information service system in the forestry section.

为了全面反映森林资源管理和生态变化的基本情况，加大对森林健康状况的监测，实现对森林资源和生态状况的综合评价，需要在林业部门建立一套高效、便捷的信息服务系统。

Don't listen to their haver, nothing of that sort.

别听他们胡说八道，根本就没那回事。

But bank's shares trade below their book value, suggesting that investors are skeptical.

但是，银行股票以低于账面价值的价格交易，这一点反应了投资者的怀疑。