摘要
基于美国第Ⅱ代河口富营养化综合评价方法,根据大辽河口生态系统压力和响应实际状况,在修订评价指标、评价阈值和指标权重基础上,比较分析了2010年8月和2017年8月大辽河口富营养化状况。结果表明,2010年8月和2017年8月大辽河口水体均呈现富营养化状态,且富营养化程度从淡水端到海水端呈现降低趋势;相比于2010年8月,由于陆源污染物总量减排等措施实施,2017年8月大辽河口营养物质压力项赋值显著减小,但浮游植物密度等初级症状项指标尚未得到改善。为进一步降低大辽河口富营养和赤潮发生风险,仍需加大实施陆源污染物减排和滨海湿地修复等增容措施。
The trophic status of the Daliao River Estuary in August 2010 and 2017 was characterized through the Assessment of Estuarine Trophic Status(ASSETS)methodology.Evaluation indexes and their thresholds and weights were modified according to the water quality and ecosystem characteristics of Chinese estuaries.Results showed that the Daliao River Estuary was both in eutrophication status in August 2010 and 2017.In the meanwhile,the eutrophication status of freshwater areas were more serious than that of seawater areas.Due to measures of reducing the total amount of land-based pollutants have been implemented,the nutrient pressure was lower in August 2017.While the primary eutrophic symptoms such as phytoplankton diversity didn’t show much improvement yet.In order to reduce the risk of eutrophication and red tide occurrence further in the Daliao River Estuary,it’s still necessary to strengthen the implementation of reducing the emission of terrigenous pollutants and restoring coastal wetlands.
作者
张栋华
马浩阳
李瑾
高会旺
唐洪杰
李正炎
ZHANG Dong-Hua;MA Hao-Yang;LI Jin;GAO Hui-Wang;TANG Hong-Jie;LI Zheng-Yan(College of Environmental Science&Engineering,Ocean University of China,Qingda O266100,China;College of Chemistry&Chemical Engineering,Ocean University of China,Qingda O266100,China;The Key Laboratory of Marine Chemistry Theory and Technology,Ministry of Education,Ocean University of China,Qingda O266100,China)
出处
《中国海洋大学学报（自然科学版）》
CAS
CSCD
北大核心
2020年第5期85-93,103,共10页
Periodical of Ocean University of China
基金
国家水体污染控制与治理科技重大专项项目(2009ZX07528-006)资助。
关键词
大辽河口
富营养化
评价指标
生态风险
Daliao River Estuary
eutrophication
evaluation indicator
ecological risk
