Bacterial Communities in the Rhizospheres of Three Mangrove Tree Species from Beilun Estuary, China.

The bacterial communities played important roles in the high productivity mangrove ecosystem. In this study, we investigated the vertical distributions of rhizosphere bacteria from three mangrove species (Bruguiera gymnorrhiza, Kandelia candel and Aegiceras corniculatum) in Beilun Estuary, China using high throughput DNA pyrosequencing of the 16S rRNA gene. Phylogenetic analysis showed that bacterial communities from mangrove rhizosphere sediments were dominated by Proteobacteria (mostly Deltaproteobacteria and Gammaproteobacteria), followed by Chloroflexi, Bacteroidetes, Planctomycetes and Acidobacteria.

[Inner- and inter-species differences of mercury concentration in common fishes from the Yellow Sea].

Mercury concentration in marine fishes and its influencing factors are the key problems in the study of mercury biomagnification in marine ecosystems. In order to understand the inner- and inter-species differences of mercury concentration in fishes from the Yellow Sea, a total of 164 marine wild fishes covering nine different species were collected from the area from August to October, 2012. Mercury (total mercury) concentration in fish muscle tissue was measured by a direct mercury analyzer.

Methylmercury in fish from the South China Sea: geographical distribution and biomagnification.

We conducted a large-scale investigation of methylmercury (MeHg) in a total of 628 marine wild fish covering 46 different species collected from the South China Sea between 2008 and 2009. Biological and ecological characteristics such as size (length and wet weight), feeding habit, habitat, and stable isotope (δ(15)N) were examined to explain MeHg bioaccumulation in marine fish and their geographical distribution. MeHg levels in the muscle tissues of the 628 individuals ranged from 0.

Ecosystem-based assessment indices of restoration for Daya Bay near a nuclear power plant in South China.

China has adopted nuclear power generation as one of the strategic energy sources to resolve the dilemma between its ever-growing energy demand and the associated environmental issues. To achieve the latter, a systematic assessment of the state of the ecosystem near nuclear power plants and its restoration via ongoing recovery actions would be highly desirable and much needed. Current assessment methods are mostly based on the individual components of the ecosystem and the methods are therefore not integrated.