Acknowledgements
This study was granted by these projects “UNDP/PEMSEA project risk assessment of Bohai sea”, “Valuation of
ecosystem service of China seas”(No. 908-02-03-04), “Assessment of ecological capital of Shangdong coastal
waters”(No. SD-908-02-10), “Impact of mariculture on ecosystem services of bay” (No. 2007GG10005012) and
“Ecological compensation of marine engineering and oil spill events” (No. 2011418006). We thank Dr. Zhaohui
Zhang for his efforts to this paper.