[Assessing the benthic ecological status in Yangtze River Estuary using AMBI and M-AMBI].

Both AMBI and M-AMBI could effectively assess the benthic ecological status of estuaries and coastal systems with soft sediments, and show the response of benthic communities to human pressures and natural changes. To monitor the ecological status of Yangtze River Estuary, macroinvertebrate samples and environmental data were collected in April 2009. Results showed that the benthic habit of Yangtze River Estuary was disturbed to various degrees, especially in the watersheds of Hangzhou Bay, coastal areas of Zhoushan islands and in the inner part of Yangtze River Estuary, which was related to land resourced discharges, eutrophication and large amounts of coastal projects.

[Primary study on enacting the lake nutrient control standard].

It is important precondition to enact viable lake nutrients control standard for lake control and management. Now China is shortage of study on nutrients control standard considering of the regional and nutrient difference. In this paper, five-step method for nutrient control standard is built following the principle of commonality, possibility and practicability.