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Spatiotemporal variations of ecosystem health of the coastal zone in Jiangsu Province based on the PSR model |
NING Li-xin1,2, MA Lan1,2, ZHOU Yun-kai1,2, BAI Xiu-ling1,2 |
1. Institute of Natural Resources and Environment, Henan University, Kaifeng 475004, China;
2. The Key Laboratory of the Coastal Zone Exploitation and Protection, Ministry of Land and Resource, Nanjing 210024, China |
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Abstract Coastal zone is the transitional area between marine ecosystem and terrestrial ecosystem, its ecosystem health is closely related to human activities. This paper took the coastal zone of Jiangsu Province as an example to assess the spatiotemporal variations of ecosystem health from 1995 to 2013. A multi-indices evaluation system was constructed to investigate ecosystem health based on the PSR conceptual model, and the index weight was determined with AHP and Entropy weighting method. Results showed that the ecosystem health indices of all sub-regions ranged from 3 to 6. The area with normal status accounted for 54% to 66% of the whole region, and the area in worse condition were 34 to 45%. Spatial pattern suggested that the middle part of the study area lied in better condition than those of southern and northern area. The values of pressure、state、response factors showed gentle decline of ecosystem health condition, particularly after 2002, which may need more attention for protection by the local government.
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Received: 08 June 2015
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