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Study on ecological security assessment of land ecosystem based on PSR model

机译:基于PSR r模型的土地生态系统生态安全 r评价研究

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It has very important meanings to study the ecological security assessment of land r ecosystem (ESALE), which could be used as theory support for r effectively identifying the land ecological risk (LER) and r implementing the effective land restoration strategy. r According to the relative researches of land ecosystem degradation, such r as emergence, development and influences of land degradation r and desertification, ESALE is developed based on r the press-stateresponse model (PSR). In which, drive and pressure r factors of land degradation and desertification, r attributes of land status, series response of land degradation and r desertification (negative response, such as natural disaster; r positive response, such as land restoration) are identified, r which could be used to describe the process of land degradation and r desertification and its influence. In addition, for quantitative r analyzing the ESALE, series of key process indexes are selected, r and based on this, coupling model of EASLE (CM-EASLE) is r originally brought forward, which could be used for assessing the r land ecological security (LES), and could offer scientific r supports for regional land management.
机译:研究土地生态系统的生态安全评价(ESALE)具有十分重要的意义,可以为有效识别土地生态风险(LER)和实施有效的土地恢复战略提供理论支持。 r根据土地生态系统退化的相关研究,如土地退化的产生,发展和影响以及荒漠化,基于压力-状态响应模型(PSR)开发了ESALE。其中,确定了土地退化和荒漠化的驱动力和压力r因子,土地状况的属性,土地退化和荒漠化的系列响应(负面响应,例如自然灾害; r正面响应,例如土地恢复),r可以用来描述土地退化和荒漠化的过程及其影响。另外,为了定量分析ESALE,选择了一系列关键过程指标,并在此基础上提出了EASLE耦合模型(CM-EASLE),可用于评估土地生态安全。 (LES),并可以为区域土地管理提供科学的支持。

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