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
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...
July is Lake & Reservoir Awareness Month!
Lakes and reservoirs cover over 40 million acres of the United States. Lakes and reservoirs also play other vital and often hidden, roles. They provide drinking water and irrigation water for agricultural fields and many times a source of electricity and power generation. They also serve an important function of absorbing rainfall and runoff from land, help to prevent floods, and provide homes for precious wildlife. Boating, fishing, and swimming are favorite recreational uses of American lakes and reservoirs....