An evaluation framework for designing ecological security patterns and prioritizing ecological corridors: application in Jiangsu Province, China
An evaluation framework for designing ecological security patterns and prioritizing ecological corridors: application in Jiangsu Province, China
复制标题
设计生态安全格局和优先考虑生态廊道的评估框架：在中国江苏省的应用
DOI：
10.1007/s10980-020-01113-6
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发表时间：
2020-09-16
影响因子：
5.2
通讯作者：
Tao, Yu
中科院分区：
文献类型：
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作者：
Xiao, Shancai;Wu, Wenjun;Tao, Yu
生态安全格局（ESP）的主要目标是确定关键的生态源和走廊，这在实现区域可持续发展中起着重要作用。虽然越来越多的评论已经发表在建设生态系统服务点，合理地优先生态走廊，以维持重要的生态过程和景观连接仍然是一个挑战。利用InVEST模型、RULSE模型和GIS空间叠置分析方法，综合考虑生物多样性、碳储量和产水量3个关键生态系统服务功能和土壤侵蚀敏感性、水分敏感性和生境敏感性3个生态敏感性指标，识别了2005 - 2010年的生态源。利用最小费用路径法划分生态廊道，结合生态源计算生态廊道的生态系统服务价格。根据重力模型和连通性概率指数，对生态廊道进行了排序。生态斑块总面积为15170.51 km2，占研究区总面积的14.61%，主要由水体、耕地和林地组成。生态廊道总长度为1920.38 km，通过优先矩阵将生态廊道划分为4个象限。第一象限的16个生态走廊（高重要性和强连通性）被定义为优先领域，并占据39.50%的总走廊length.ConclusionOur方法框架提供了一个宝贵的工具，建设ESP和优先走廊在区域范围内。该框架纳入了有针对性的生态系统服务和生态脆弱性指标，以系统地评估和确定关键的生态空间。根据其重要性和对加强连通性的贡献而选定的生态走廊的保护是一项更有针对性的措施。它可以应用于其他景观和地理环境。
ContextThe major goal of ecological security patterns (ESPs) is to identify key ecological sources and corridors, which play an important role in achieving regional sustainability. Although an increasing number of reviews have been published on constructing ESPs, reasonably prioritizing ecological corridors to maintain vital ecological processes and landscape connectivity remains a challenge.ObjectiveThis study aimed to provide guidance for landscape management and decision making by developing an evaluation framework to construct ESPs and further prioritize potential corridors.MethodsTaking Jiangsu Province as a study area, we identified ecological sources by considering three key ecosystem services (biodiversity, carbon storage and water yield) and three ecological sensitivity indicators (soil erosion sensitivity, water sensitivity and habitat sensitivity) using the InVEST model, RULSE model and GIS spatial overlay analysis. Then, ecological corridors were delineated with the least-cost path method, and the ESPs were obtained by combining these corridors with ecological sources. We further prioritized ecological corridors based on the gravity model and the probability of connectivity index.ResultsThe ESPs of Jiangsu Province contained 51 patches and 37 corridors. The total area of the ecological patches was 15,170.51 km2, accounting for 14.61% of the study area and primarily consisting of water bodies, cropland and forestland. Ecological corridors comprised 1920.38 km and were divided into four quadrants via a precedence matrix. The sixteen ecological corridors in the first quadrant (high importance and strong connectivity) were defined as priority areas and occupied 39.50% of the total corridor length.ConclusionOur methodology framework offers a valuable tool for constructing ESPs and prioritizing corridors at the regional scale. This framework incorporates targeted ecosystem services and ecological vulnerability indicators to systematically assess and identify key ecological space. The conservation of ecological corridors selected in light of their importance and contribution to enhancing connectivity is a more targeted measure. It could be applied to other landscapes and geographical contexts.