Abstract
Land ecological security evaluation is not only the core and foundation of land resources’ sustainable utilization, but also the key reference of land planning, management and protection of decision-making. Research on land ecological security evaluation has become a hot field in the land ecological security problems since the late 1990s. A review was performed of existing progress on land ecological security evaluation in China. Three main questions arise: a) the spatial scale evaluation is not deep and wide, and the time scale evaluation most for static evaluation. b) Construction of index system has strong subjectivity, and what indicators are to be used to describe land ecological security. Most approaches aim at a single or limited number of indices for land ecological security, for data availability reasons. c) Innovation and the comparisons are lacked between the evaluation methods. Dynamic evaluation, objective evaluation indexes, integrated evaluation methods are however required.
Highlights
Land ecosystem provide the necessary basic material resources for human development, the number and quality of land resources is an important factor that decides the level of national security
Land ecological security evaluation is the fundamental work in this area, the core and foundation of building a security pattern of land use and land-use patterns optimized with a great significance of study on land ecological construction and eco-friendly land use(Pei-jun Shi et al.2002; Shi-liang Liu,2007; Xiang-hao Zhong et al.,2008)
China has carried out the land ecological security evaluation mainly included township and county, province and other administrative units as the data carrier, and a large regional scale as the research object(Keming Tian and Guoqiang Wang,2005;Yan-bo Qu et al.2008), includes a variety of land use types scale assessment, large regional scale, as the research object(Keming Tian and Guoqiang Wang,2005;Yan-bo Qu et al.2008), includes the evaluation of a variety of land use types
Summary
Land ecological security evaluation mainly includes two aspects. 1 The status evaluation of land and development of ecological security, analyzing the current situation and existing problems through land ecological security evaluation, and providing a gist for land resource sustainable development. 2 Evaluation of the key factors affecting land ecological security, time and scale. Land ecological security evaluation mainly includes two aspects. The status evaluation of land and development of ecological security, analyzing the current situation and existing problems through land ecological security evaluation, and providing a gist for land resource sustainable development. Evaluation of the key factors affecting land ecological security, time and scale. Based on types and characteristics of the framework of ecosystem within the evaluation scale, selecting the appropriate representation factors to evaluate in order to take protective or restoration measures. Land ecological safety assessment of China have shown the mainstream of space scales and the time scale for the branch, regional land ecological security assessment research as the core of the pattern (Hongxia Li, 2006; Jie-sheng Yao and Jing-yi Tian, 2007)
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