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生态系统服务_熵值灰色预测法在生态环境胁迫性研究中的应用

发布时间:2016-11-12 16:28

  本文关键词:生态环境胁迫性,由笔耕文化传播整理发布。


熵值灰色预测法在生态环境胁迫性研究中的应用

作者:汪雪格等

来源:《安徽农业科学》2015年第10期

摘要

以松嫩平原典型地区通榆县为例,在构建生态环境胁迫性评价指标体系的基础上,运用熵值- GM(1∶1)对生态环境胁迫性进行评价和预测研究。结果表明,水资源短缺、沙漠化、盐碱化、草地退化和人口增加是通榆县生态环境恶化的主要胁迫因子;1994~2013年该区生态环境胁迫系数逐年增加,胁迫程度从Ⅲ级跃升到Ⅳ级。预测结果显示,如果不采取保护生态环境的措施,胁迫系数仍会增长,胁迫程度仍会加重。针对上述情况,提出了河湖连通、水资源优化配置、防沙治碱、改良退化草地等措施,以减轻对生态环境的胁迫,,促进资源、环境与社会经济的协调发展。

关键词生态环境胁迫性;胁迫系数;熵值-GM(1∶1);松嫩平原;通榆县

中图分类号S181.3文献标识码A文章编号0517-6611(2015)10-259-04

AbstractTaking Tongyu County as an example, based on the indicator system of

ecoenvironmental stress, using the model of the entropyGM(1∶1), the ecoenvironmental stress was evaluated and forecasted. Results showed that the short of water resources, desertification, salinization, grassland degeneration and population increase are major factors of ecoenvironment worsen in Tongyu County; stress coefficient in 1994 to 2013 were increase year by year, the stress degree jumped from III level to IV level. The forecast result showed that, if the measures doesn’t be taken to protect ecoenvironment, the coefficient still grow, the degree aggravate. In view of the above situation, this paper takes the measures to lighten ecoenvironment stress, promote the coordinated development of resources, environment, social and economy, such as water resources optimization distribution, prevention and control of desertification and salinization, improvement of degenerated grassland.

Key words Ecoenvironmental stress; Stress coefficient; Entropy- GM(1∶1); Songnen Plain; Tongyu County

随着生态环境科学的发展,生态环境胁迫性研究已成为生态学领域研究的热点。在生态学领域中,胁迫是生态学家从工程中借用的一个词汇,用来表述各种不利生态因子所引起的生物体生理变化,以及种群、群落和生态层次上的生态变化,这种变化又称为胁迫效应[1]。胁迫一词最早用于逆境生理学的研究中,是生物所处的不利环境的总称[2]。Odum等认为,胁迫是


  本文关键词:生态环境胁迫性,由笔耕文化传播整理发布。



本文编号:172340

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