Bacteria from seven Lake Vostok accretion and two deep glacial Vostok ice core sections were characterized. The cell concentrations were low, but many of the cells were viable. From the hundreds of cultures, 18 unique bacterial rRNA gene phylotypes were determined. Lake Vostok may contain a complex microbial ecosystem.
- American Society for Microbiology
- Isolation of microbes from lake vostok accretion ice
Aeration and Mixing Bring Hussain Sagar Lake`s Ecosystem Back to Life
Overview Hussain Sagar Lake in India faced an inflow of untreated waste and pollution causing decreasing DO levels and foul odors in the nearby community. An even more critical threat was eutrophication, or an excessive number of nutrients in the body of water, choking out the natural aquatic life. Given the lake is stagnate, circulation and the distribution of efficient aeration was needed to alleviate these issues. Challenge Hussain Sagar Lake is located in a recreational area with many visitors. The lake...
Lake hydrology, water quality and ecology impacts of altered river–lake interactions: advances in ...
Water and mass exchange between rivers and lakes are key processes that maintain the health of the ecology of river–lake systems. Alteration to river–lake interactions have great impacts on water and mass balances. Naturally connected to the middle Yangtze River are the Poyang Lake and Dongting Lake, which are the largest and the second largest freshwater lakes in China. The operation of the Three Gorges Dam (TGD) in the upper Yangtze River was found to have substantial impacts on the middle Yangtze river–lake...
Water quality characteristics of Poyang Lake, China, in response to changes in the water level
As one of the few remaining lakes that are freely connected with the Yangtze River, Poyang Lake exhibits large annual water level (WL) fluctuations. In this study, weekly samples were collected at the north end of Poyang Lake from September 2011 to December 2012, and we investigated the mechanism of limnological responses to fluctuations in the WL. The study covers three seasons that were associated with WL fluctuations ranging from 8 to 19 m. Spearman's rank correlations and multivariate non-metric multidimensiona...
Numerical evaluation of flow regime changes induced by the Three Gorges Dam in the Middle Yangtze
The full operation of the Three Gorges Dam (TGD) has altered the downstream natural flow regime. Flow regime changes have resulted in profound influences on the utility of water resources and hence a large area with a riparian ecosystem including China's two largest freshwater lakes in the Middle Yangtze. Because of complicated flow regimes in this large-scale river–lake system, the TGD's impacts on flow regimes are highly heterogeneous and require to be carefully addressed. To better understand them, we estimated...
Contrasting PCB bioaccumulation patterns among Lake Huron lake trout reflect basin specific ecology
This study collected multiple age classes of lake trout from Lake Huron's Main Basin, Georgian Bay and North Channel regions to compare and contrast top predator polychlorinated biphenyl (PCB) bioaccumulation patterns in separate compartments of the same ecosystem. Sum PCB concentrations were highest for Main Basin (260 ± 24.9 ng · g−1 wet wt.) fish followed by Georgian Bay (74.6 ± 16.2 ng · g−1) and North Channel (42.0 ± 3.3 ng · g−1) fish. Discriminant functions analysis of lake trout PCB profiles and stable...