Bacteria play an important role in the decomposition and cycling of a variety of compounds in freshwater aquatic environments, particularly nutrient-rich eutrophic lakes. A unique Chinese eutrophic lake--Dianchi--was selected for study because it has two separate and distinct basins, Caohai with higher organic carbon levels and Waihai with lower organic carbon levels. Sediment bacterial communi...

Spatial information of the dominant species of submerged aquatic vegetation (SAV) is essential for restoration projects in eutrophic lakes, especially eutrophic Taihu Lake, China. Mapping the distribution of SAV species is very challenging and difficult using only multispectral satellite remote sensing. In this study, we proposed an approach to map the distribution of seven dominant species of ...

We explored the abundance and infection rates of viruses on a time series scale in the euphotic zone of the humic mesotrophic Lake Vassivière (Massif Central, France) and compared them to nonhumic lakes of contrasting trophy (i.e., the oligomesotrophic Lake Pavin and the eutrophic Lake Aydat) located in the same geographical region and sampled during the same period. In Lake Vassivière, the abu...

Many lakes in boreal and arctic regions have high concentrations of CDOM (coloured dissolved organic matter). Remote sensing of such lakes is complicated due to very low water leaving signals. There are extreme (black) lakes where the water reflectance values are negligible in almost entire visible part of spectrum (400–700 nm) due to the absorption by CDOM. In these lakes, the only water-leavi...

888 PERSPECTIVES as much terrestrial carbon is received by inland waters as reaches the world's oceans (11). Calcareous catchments also release considerable carbon to lakes as bicarbonate and carbonate. In total, inland waters may bury about four times as much carbon as do the oceans (10). Much of the organic carbon received by lakes is mineralized and emitted to the atmosphere as carbon dioxid...

The efficiencies of the restoration two lakes varied morphometries and trophic states—meromictic, hypertrophic Lake Klasztorne Ma?e, dimictic, eutrophic Du?e—with use phosphorus inactivation method with sequential application iron aluminum compounds have been compared. total dose agents applied for Ma?e was 38 tons PAX 18 (aluminum polychloride) 14 PIX 111 (iron chloride), Du?e, it 74 46 111. A...

Background: The bottom-up (food resources) and top-down (grazing pressure) controls, with other environmental parameters (water temperature, pH) are the main factors regulating the abundance and structure of microbial communities in aquatic ecosystems. It is still not definitively decided which of the two control mechanisms is more important. The significance of bottom-up versus top-down contro...

BACKGROUND The bottom-up (food resources) and top-down (grazing pressure) controls, with other environmental parameters (water temperature, pH) are the main factors regulating the abundance and structure of microbial communities in aquatic ecosystems. It is still not definitively decided which of the two control mechanisms is more important. The significance of bottom-up versus top-down control...