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- The 200 years successional history of agri ecological system in black soil region almost covered all the successional process happened over the past 3000 years in Central Plain region of China. 黑土农业生态系统200年的演替历史,几乎跨越了我国中原地区3000年的演替过程。
- Results Landscape scale is the right scale to assess regional ecological Security. 结果景观尺度是区域生态安全评价的适宜尺度。
- The status quo of China's forestry indicates that forestry development does not meet the requirement for maintaining ecological security. 林业现状说明，林业发展与维护生态安全的要求极不适应。
- And then the method of ecological security was applied to the case of Kaifeng city and some suggestions on ecological security construction were put forward. 在此基础上，以开封市为研究对象，对开封旅游的生态安全进行了定量的研究，提出了开封市旅游生态安全建设的若干建议。
- The main causes for the deterioration of land ecological security are unreasonable reclaimation、 denudation, overgrazing and the extensive farming. 滥垦、滥伐、过度放牧以及粗放经营的生产方式是导致该地区土地生态环境安全状况不断下降的主要原因。
- Hyphantria cunea invaded Jinan for the first time in 2007, and has caused serious damage to city scape and ecological security of Jinan. 摘要2007年美国白蛾首次入侵济南市，对城市景观和生态安全构成严重威胁。
- China's ecological situation is grim with aquaculture pollution,soil erosion and desertification threatening the country's ecological security. 我国生态形势十分严峻,水产品的污染、水土流失和土地沙化威胁着国家生态安全。
- This raises a new requirement for supervising and developing forest resources of state-owned forest areas and protecting China"s ecological security. 对国有林区森林资源实施监督，是保证国有林区森林资源所有者权益的必要措施和手段。
- Regional ecological security research has the macroscopic and target characteristics, and the assessment standards are relative and in development. 区域生态安全研究具有宏观性和针对性的特点,评价标准具有相对性和发展性。
- The results showed that the comprehensive index of ecological security of Zigui County was 0.48, indicating a insecure state. 结果表明：秭归县生态安全综合值为0.;48，处于不安全状态。
- By the analysis of the tendency of regional ecological security from 1990 in Yulin, we can find that ecological security of Yulin presents a power function development. 通过对榆林市1990年以来生态安全变化趋势分析可知:榆林市的生态安全状况呈现出幂函数发展态势。
- Yulin District and Hengshan County were taken as the cases, and ecological security index system was constructed to assess the security levels of the two regions. 选择了榆林市和横山县两个行政单元，针对区域特征，构建了不同尺度上的生态安全指标体系，利用层次分析法，对不同尺度上生态安全的空间分异进行了研究。
- Healthy wetland ecosystem is a very important constituent of national ecological security system and an important foundation of social and economic sustainable development. 健康的湿地生态系统,是国家生态安全体系的重要组成部分和社会经济可持续发展的重要基础。
- Wuzhong district of Suzhou city being taken as an example,with this indicator system,the comprehensive evaluation of landscape ecological security in 1984 and 2002 was conducted. 结果表明;景观生态安全评价综合指数从1984年的63.;29%25下降到2002年60
- From the comprehensive results, it brings forward the ensure about the design and construct of the ecological security, for the continuable use of the regional resource. 针对综合分析结果,提出了以区域资源可持续利用为目标,维护区域生态安全的系统设计和建设生态安全格局的保障。
- Firstly, it is an ecological planning approach: natural topography, vegetation, and water systems are well protected to form an ecological security pattern. 第一，一个生态规划模式：保护和充分利用原有自然地形和水系，形成景观生态安全格局。
- Abstract: The invison of alien species have so seriously threatened the global ecological security as to cause the gradual forfeiture of biological diversity. 外来物种入侵已经严重威胁到全球的生态安全，导致生物多样性的逐渐丧失。
- This paper applies grey associative analysis into assessment of ecological security, establishes the reference sequence, compare sequence and the assessment level. 将灰关联方法应用于生态安全评价,分别建立了生态安全评价的参考序列、比较序列和评判等级。
- When asked how to evaluate China's present environment situation, Qu said in general, China continues to face the dual pressures from environment pollution and ecological deterioration, and the country's ecological security is not optimistic. 当记者问到对当前中国环境形势如何评估时，曲格平说，从总体上看，中国仍然承受着环境污染和生态恶化的双重压力，中国生态安全不容乐观。
- Implementation of the six key programs will not only play a significant role in improving the ecosystem and achieving sustainable development in China, but also make great contributions to safeguarding global ecological security. 这六大工程的实施，不仅对中国改善生态环境、实现可持续发展发挥重要作用，也是对维护全球生态安全的重大贡献。
