[Objective] This research aimed to assess the state of ecosystem health and comprehensive ecological benefit of an artificial wetland in western Jilin Province. [Method] To investigate the effects of reclaimed water f...[Objective] This research aimed to assess the state of ecosystem health and comprehensive ecological benefit of an artificial wetland in western Jilin Province. [Method] To investigate the effects of reclaimed water from Yingtai Oil Production Plant on the wetland ecosystem, a comprehensive ecological assessment index of an artificial wetland in the west of Jilin Province was established to measure the ecological economic and social benefits. The quantitative evaluation on the ecosystem health and comprehensive ecological benefit of the artificial wetland were carried out from 2003 to 2010 and were measured by means of the square difference method. [Result] After eight years of irrigation by reclaimed water, the levels of ecosystem health and benefit of the artificial wetland improved from Grade IV to Grade II, and the ecological environment, economic and social development of the wetland tended to improve. [Conclusion] The results indicated that the use of reclaimed water for irrigation of wetland ecosystems was a suitable way to control drought in arid and semi-arid regions.展开更多
Using the method of trophic state-composite index (TSI-CI ) and the 12 months of monitoring data in 2010,we carry out initial exploration of the status of ecosystem health in Wuli Lake. First,we select four indicators...Using the method of trophic state-composite index (TSI-CI ) and the 12 months of monitoring data in 2010,we carry out initial exploration of the status of ecosystem health in Wuli Lake. First,we select four indicators,Chla,SD,TP and TN,to conduct trophic state assessment using weighted index method; then after selecting physical,chemical and biological indicators to conduct nondimensionalization processing,we calculate the composite index and conduct comprehensive assessment. The results show that in 2010,the status of ecosystem health in Wuli Lake was the best in July,worst in August; when the composite trophic state indicators with Chla as the representative increase or decrease significantly and cross different nutritional grades,TSI will significantly deviate from CI,and the relationship between the two in the other time is not prominent.展开更多
A healthy ecosystem depends on the coordination of ecosystem structure and function.The coordination among ecosystem components,however,is seldom taken into account in current ecosystem health assessments(EHA).Neglect...A healthy ecosystem depends on the coordination of ecosystem structure and function.The coordination among ecosystem components,however,is seldom taken into account in current ecosystem health assessments(EHA).Neglect of such coordination may lead to large degrees of uncertainty in EHA and fail to support ecosystem management.We propose an approach to quantify the level of dynamic mismatching between ecosystem structure and function and the impact on ecosystem health by incorporating the ecosystem coordination index into EHA.The coordination degree is calculated using variation coefficient of six proxies for ecosystem structure and functions.The ecosystem at Jiaozhou Bay,as a microcosm of China's coast,has been documented to fluctuate from healthy to unhealthy status over the past three decades.The results indicate that there is a 3%-17% lower health level than that calculated by common methods used in the literature,indicating that the health of Jiaozhou Bay has become worse than expected.Habitat change contributes 20%-52% to ecosystem mismatches and is the most uncoordinated factor.Mismatch-related declines account for approximately one-fourth of the total ecological declines.Restoration scenarios that aim to resolve ecosystem mismatches could increase efficiency by about 50% compared to restoration scenarios that do not consider mismatches.This study investigates ecological declines in a coastal bay due to 30 years of rapid economic development.In doing so,this study provides novel insights and enhances our understanding of the reasons for failure in ecological restoration.展开更多
基金Supported by 2007 Environmental Protection Project of Jilin Provincial Department of Environmental Protection (2007-09)
文摘[Objective] This research aimed to assess the state of ecosystem health and comprehensive ecological benefit of an artificial wetland in western Jilin Province. [Method] To investigate the effects of reclaimed water from Yingtai Oil Production Plant on the wetland ecosystem, a comprehensive ecological assessment index of an artificial wetland in the west of Jilin Province was established to measure the ecological economic and social benefits. The quantitative evaluation on the ecosystem health and comprehensive ecological benefit of the artificial wetland were carried out from 2003 to 2010 and were measured by means of the square difference method. [Result] After eight years of irrigation by reclaimed water, the levels of ecosystem health and benefit of the artificial wetland improved from Grade IV to Grade II, and the ecological environment, economic and social development of the wetland tended to improve. [Conclusion] The results indicated that the use of reclaimed water for irrigation of wetland ecosystems was a suitable way to control drought in arid and semi-arid regions.
基金Supported by Project of Wuxi Municipal Development and Reform Commission (2115019)
文摘Using the method of trophic state-composite index (TSI-CI ) and the 12 months of monitoring data in 2010,we carry out initial exploration of the status of ecosystem health in Wuli Lake. First,we select four indicators,Chla,SD,TP and TN,to conduct trophic state assessment using weighted index method; then after selecting physical,chemical and biological indicators to conduct nondimensionalization processing,we calculate the composite index and conduct comprehensive assessment. The results show that in 2010,the status of ecosystem health in Wuli Lake was the best in July,worst in August; when the composite trophic state indicators with Chla as the representative increase or decrease significantly and cross different nutritional grades,TSI will significantly deviate from CI,and the relationship between the two in the other time is not prominent.
基金supported by the National Natural Science Foundation of China–Shandong Joint Fund of Marine Science Research Centers of China(No.U1406403)the NSFC(No.41306100)the Scientific Research Foundation of Guangxi University(No.XGZ 160281)
文摘A healthy ecosystem depends on the coordination of ecosystem structure and function.The coordination among ecosystem components,however,is seldom taken into account in current ecosystem health assessments(EHA).Neglect of such coordination may lead to large degrees of uncertainty in EHA and fail to support ecosystem management.We propose an approach to quantify the level of dynamic mismatching between ecosystem structure and function and the impact on ecosystem health by incorporating the ecosystem coordination index into EHA.The coordination degree is calculated using variation coefficient of six proxies for ecosystem structure and functions.The ecosystem at Jiaozhou Bay,as a microcosm of China's coast,has been documented to fluctuate from healthy to unhealthy status over the past three decades.The results indicate that there is a 3%-17% lower health level than that calculated by common methods used in the literature,indicating that the health of Jiaozhou Bay has become worse than expected.Habitat change contributes 20%-52% to ecosystem mismatches and is the most uncoordinated factor.Mismatch-related declines account for approximately one-fourth of the total ecological declines.Restoration scenarios that aim to resolve ecosystem mismatches could increase efficiency by about 50% compared to restoration scenarios that do not consider mismatches.This study investigates ecological declines in a coastal bay due to 30 years of rapid economic development.In doing so,this study provides novel insights and enhances our understanding of the reasons for failure in ecological restoration.
