1) value of ecological safety
生态安全价值
2) ecological security assessment
生态安全评价
1.
Ecological security assessment model and corresponding indicator system of the regions along Huaihe River in Anhui Province.;
安徽省沿淮地区生态安全评价模型和指标体系
2.
Regional ecological security assessment on Central Asia based on ecological footprint analysis;
基于生态足迹的中亚区域生态安全评价
3.
Research on the Ecological Security Assessment of Karst Degraded Landscape Based on 3S Technology;
3S支持下喀斯特退化景观生态安全评价研究
3) eco-security evaluation
生态安全评价
1.
GIS-based land-use eco-security evaluation in typical agro-pastoral zone;
基于GIS的典型农牧交错区土地利用生态安全评价
2.
Moreover, the evaluation of eco-security and the application of 3S technologies in eco-security evaluation on soil erosion area are finished.
本研究以遥感影像为主要数据源,结合基础地理数据和野外实地考察资料,对长汀县1994 年和2003 年的水土流失进行监测和评估,并对其生态安全状况进行评价,探讨应用3S 技术面向水土流失地区的生态安全评价研究途径。
3.
Combining the research of national science foundation(40771019), and choosing the Guanzhong area as study area, this paper combing qualitative with quantitative to determine eco-security evaluation grade Threshold, on the basis of the comprehensive analysis ecosystem environment condition in research area and summarizing up the property of eco-security.
本文结合国家自然科学基金项目(40771019),选择陕西关中地区为研究区,在对研究区生态环境状况进行综合分析和对生态安全这一概念的性质进行总结的基础上,定性与定量相结合地确定了生态安全评价等级划分阈值,并依据“压力——状态——响应”模型建立了格网化下区域生态安全评价体系,通过对关中地区1990年、2000年和2007年这三期遥感影像进行解译,得到对应年份的土地利用数据,然后在格网GIS技术的支持下,基于土地利用和NDVI等数据基础,对评价体系中各指标进行1Km*1Km尺度下的网格化表达,运用基于栅格数据的空间叠加方法实现生态安全的模型化评价,得到格网化下关中地区生态安全指数空间数据,最后从空间自相关、空间异质性和时空演变趋同这三个方面对其进行了地统计分析,总结出1990～2007年间关中地区生态安全特点,并结合影响生态安全各指标的权重及变化情况分析,尝试提出关中地区生态安全建设对策。
4) Ecological security evaluation
生态安全评价
1.
By studying ecological brittle situation of desertification region which base on Huailai county, results show the ecological security evaluation index system and construct principle, divide groups of coefficient by adopting quantity principle and method, definite coefficient weight by using related degree analysis, and put forwar.
以怀来县为例,对生态脆弱的荒漠化地区的安全状况进行研究,提出了荒漠化地区生态安全评价的具体指标体系和构建原则,并采用数量化原理与方法,对各指标进行了具体量级划分,采用关联度分析方法,对指标的权重进行了确定,并提出了衡量生态安全程度的数量化指标生态安全系数及其计算方法。
2.
Based on the theories related to land and ecology,the paper adopted the method of System Analysis and Delphi to establish a suit of index system which was suitable to the ecological security evaluation of land resources in the hill area,on the basis of this index system,the paper combined Analytic Hierarchy Process with Information Entropy to evaluate land resources ecological security in Wugang.
在研究土地与生态科学相关理论的基础上,运用系统分析法、德尔斐法等方法,构建了一套符合丘陵山区土地资源生态安全评价的指标体系,根据该指标体系采用层次分析法(AHP)与信息熵法相结合的方法对武冈市土地资源生态安全进行评价。
3.
This research applied Entropy-right Method and a comprehensive appraisal model to confirm every weight of indexes and calculate the result of evaluation,and taking the pastoral area of Gansu as an example under the guidance of model of ecological security evaluation,namely,State-Pressure-Response.
本文在生态安全评价状态-压力-响应概念框架模型的指导下,以甘肃牧区草原生态安全评价为例,将熵权法与综合评价法有机结合进行了甘肃牧区草原生态安全评价指标权重确定及评价结果计算,在一定程度上丰富和发展了区域生态安全评价方法。
5) ecological safety evaluation
生态安全评价
1.
The results indicate the values of unsafe factors for ecological safety evaluation o f 10counties in the region decreased,which can provide guidance for land develo pment and consolidation in the simil ar basin.
研究方法:生态安全评价法、Delphi经验统计判断法等。
2.
In such cases,how to carry on ecological safety evaluation in the subsiding mining area seemsparticularly important.
虽有部分塌陷区已经进行复垦,但是并未达到比较令人满意的安全状态,在这样的情况下,如何对采煤塌陷区进行生态安全评价显得尤为重要。
6) ecological safety assessment
生态安全评价
1.
Importance of neutral insect in ecological safety assessment system of pest-resistant transgenic rice paddy;
中性昆虫在转基因稻田生态安全评价体系中的重要性
2.
Under the guidance of "pressure-state-response" model,a conceptive model of ecological safety assessment,and by the combination of entropy-right and comprehensive appraisal methods,this paper made an assessment on the grassland ecological safety of Gansu pastoral area.
在生态安全评价压力-状态-响应概念框架模型指导下,以甘肃牧区为例,将熵权法与综合评价法有机结合,进行了甘肃牧区草原生态安全评价研究。
3.
The present paper has introduced the concept of ecological safety assessment from the point of view of the environmental impact assessment for the first time.
从环境影响评价的角度出发,提出了生态安全评价的概念,阐述了生态安全评价的特点及理论基础,并对在中国开展生态安全评价工作提出了几点建议。
补充资料：一棵树的生态价值
印度加尔各答农业大学德斯教授对一棵树的生态价值进行了计算：一棵50年树龄的树，以累计计算，产生氧气的价值约31200美元；吸收有毒气体、防止大气污染价值约62500美元；增加土壤肥力价值约31200美元；涵养水源价值37500美元；为鸟类及其他动物提供繁衍场所价值31250美元；产生蛋白质价值2500美元。除去花、果实和木材价值，总计创值约196000美元。
说明：补充资料仅用于学习参考，请勿用于其它任何用途。
参考词条