Submerged macrophytes can have a profound effect on shallow lake ecosystems through their ability to modify the thermal structure and dissolved oxygen levels within the lake. Invasive macrophytes, in particular, can grow rapidly and induce thermal gradients in lakes that may substantially change the ecosystem structure and challenge the survival of aquatic organisms. We performed fine-scale mea...

Excessive anthropogenic nitrogen (N) and phosphorus (P) inputs have caused an alarming increase in harmful cyanobacterial blooms, threatening sustainability of lakes and reservoirs worldwide. Hypertrophic Lake Taihu, China's third largest freshwater lake, typifies this predicament, with toxic blooms of the non-N2 fixing cyanobacteria Microcystis spp. dominating from spring through fall. Previou...

Giant cutgrass ( Zizaniopsis miliacea (Michx.) Doell. & Asch.), a tall emergent grass native to the southeastern United States, was studied in Lake Seminole where it formed large expanding stands, and Lake Alice where it was confined to a stable narrow fringe. In Lake Seminole, the production of functional stolons which were able to become rooted in the substrate resulted in stand expansion of ...

After a 40-year absence caused by pollution and eutrophication, burrowing mayflies (Hexagenia spp.) recolonized western Lake Erie in the mid 1990s as water quality improved. Mayflies are an important food resource for the economically valuable yellow perch fishery and are considered to be major indicator species of the ecological condition of the lake. Since their reappearance, however, mayfly ...

Lakes Nicaragua and Managua are large, rather shallow, fresh-water bodies that lie in a late Tertiary and Quaternary graben in western Nicaragua. The bottom sediments comprise highly organic diatomaceous volcanic silts and clays in which quartz plagioclase feldspar, dioctahedral montmorillonite and volcanic glass are the principal constituents. ' Organic nitrogen content of the lake sediments r...

Title Vertical distribution of major sulfate-reducing bacteria in a shallow eutrophic meromictic lake Author(s) Kubo, Kyoko; Kojima, Hisaya; Fukui, Manabu Citation Systematic and Applied Microbiology, 37(7): 510-519 Issue Date 2014-10 DOI Doc URL http://hdl.handle.net/2115/57661 Right Type article (author version) Additional Information There are other files related to this item in HUSCAP. Chec...

In a recent issue of Limnology and Oceanography, Schef-fer et al. (2001) argued that ''the probability of clear water phases increases with increasing lake water temperature in shallow lakes and that small decreases in temperature may create a shift to a turbid state and an increase to a clearwater state.'' They based their evidence on a correlation between a defined clearwater state and the wi...

Geographic isolation is suggested to be among the most important processes in the generation of cichlid fish diversity in East Africa's Great Lakes, both through isolation by distance and fluctuating connectivity caused by changing lake levels. However, even broad scale phylogeographic patterns are currently unknown in many non-cichlid littoral taxa from these systems. To begin to address this,...

Five years of wind observations taken by the research vessel C.C.G.S. Porte Dauphine on Lake Erie and Lake Ontario have been compared to simultaneous observations taken a t land stations upwind of the ship. The resultant ratios of over-lake winds/over-land winds have been sorted by speed classes, conditions of atmospheric stability, and the length of the over-water fetch to assess the relative ...

The lake Anasagar is a perennial, shallow fresh wetland situated in the heart of Ajmer city. It is degraded because of anthropogenic activities including input of detergents, agricultural activities, sewage disposal and human settlement around the lake. It is also a major tourist attraction for boating and recreational activities. Trapa bispinosa is the primary cash crop, comprises about 50% of...