Developing quantitative ecosystem–scale expectations of habitat restoration projects and examining trade-offs associated with alternative approaches has been a challenge for restoration ecology. Many of the largest freshwater lake restoration projects have occurred in Florida to remediate degradation to vegetated littoral habitats resulting from stabilized water levels, but effects across lake ...

endoscopic esophageal cancer survey in the western part of the caspian littoral

Seasonal changein the abundance. biornass and species richness of fixh in the littoral zone of Lake Coustancc were examined. Electric fishing was conducted in three depth strata at six different sampling sitc« within the littoral zone from Novem­ ber ]991 to Fcbruar ]993 during daytime. Minimal abundance and biomaxs values were observed in February with 3.9 (SO ± ..\..2) ind· lOO Ill-" and 12.7...

Lake Tanganyika is the largest of the African rift lakes and the second deepest lake in the world (Coulter, 1991). It provides many critical services to communities in the four riparian countries of Tanzania, Zambia, D. R. Congo, and Burundi, and serves as an important source of protein through its vibrant fishery (Coulter, 1991). This fishery can be divided into two general categories based on...

Depth profiles of oxygen concentration and the redox status of acid-extractable iron were measured in littoral sediment cores of Lake Constance after mechanical removal of surface sediment, mixing, and re-deposition. In undisturbed sediment cores, oxygen penetrated down to 2.9±0.4 mm or 4.6±0.4 mm depth, respectively, after 12 h of incubation in the dark or light; causing a net diffusive flux o...

The impacts of navigation on the hydromorphological and ecological conditions rivers are manifold. Most relevant effects can be linked to ship-induced waves, which temporarily alter prevailing flow conditions. waves usually highest in shallower (littoral) zones, where whole water column is affected by increased velocities. mitigation these desired improve as well prevent bank erosion processes....

Coastal erosion of sandy beaches is a global problem that threatens ecosystems and coastal communities. Beach nourishment one the commonly implemented mitigation strategies, using beach compatible sediment from various borrow sources placed on back in littoral system. However, geotechnical properties different can vary. Sediment characteristics influence post-nourishment equilibration, slope, s...