An evaluation framework for designing ecological security patterns and prioritizing ecological corridors: application in
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RESEARCH ARTICLE
An evaluation framework for designing ecological security patterns and prioritizing ecological corridors: application in Jiangsu Province, China Shancai Xiao . Wenjun Wu . Jie Guo Weixin Ou . Yu Tao
. Minghao Ou . Steven G. Pueppke .
Received: 16 December 2019 / Accepted: 7 September 2020 Ó Springer Nature B.V. 2020
Abstract Context The 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. Objective This study aimed to provide guidance for landscape management and decision making by
Electronic supplementary material The online version of this article (doi:https://doi.org/10.1007/s10980-020-01113-6) contains supplementary material, which is available to authorized users. S. Xiao W. Wu J. Guo (&) M. Ou (&) W. Ou Y. Tao College of Land Management, Nanjing Agricultural University, Nanjing 210095, China e-mail: [email protected] M. Ou e-mail: [email protected] J. Guo M. Ou W. Ou Y. Tao National & Local Joint Engineering, Research Center for Rural Land Resources Use and Consolidation, Nanjing 210095, China S. G. Pueppke Center for Global Change and Earth Observations, Michigan State University, 1405 South Harrison Road, East Lansing, MI 48824, USA
developing an evaluation framework to construct ESPs and further prioritize potential corridors. Methods Taking 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. Results The 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. Conclusion Our 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 systematical
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