Local and turnover patterns of fish diversity in the Itaipu Reservoir were evaluated and related to a longitudinal or river-dam gradient (composed of riverine, transitional, and lacustrine zones) and to transversal or upstream-downstream gradients of the tributaries (composed of lotic and lentic stretches of tributaries and reservoir shores). Thirteen stations were sampled quarterly during 2 ye...

Environmental flow requirements, to maintain the functioning of freshwater-dependent ecosystems and restore rivers in ecologically acceptable conditions, depend upon the present water quality status of the river. Various stretches of Vishwamitri River vary in quality and quantity. Water quality index is a tool to converse information regarding water quality of various stretches of river and can...

In previous years, studies h.;.ve been conducted on several tributaries of Otsego Lake and the upper Susquehanna River that analyzed the concentrations offecal coliforms. a group of bacteria found in the intestines ofwarm blooded animals and thus indic' ve offecal contamination. Research was conducted for the duration of the SUIll:.ler ,f 1996 on the upper Susquehanna River, Hayden Creek, Shado...

The focus on macrophyte community has increased due to their implications either on the electricity generation or on greenhouse gas production and emission. A TM/Landsat5 time series was used to assess the spatial-temporal variability of the area covered by floating macrophytes in Tucuruí dam, Pará State. The map produced by Boolean operation among classified historical images suggests that tri...

The tributaries of Lake Whatcom, Austin/Beaver, Anderson, Olsen, and Smith Creeks, provide essential habitat for many fish species native to the Pacific Northwest. However, development in the watershed has contributed to habitat alterations and even degradation of habitat quality. In this report, fish abundance and diversity, and habitat quality is compared both temporally, and among different ...

This special issue of Journal of Physics: Condensed Matter focuses on physical aspects of capacitive energy storage and harvesting devices based on electrical double layers. An electrical double layer (EDL) is an interfacial structure in which charges are separated between two neighboring phases or layers. Originally introduced by Helmholtz in 1850, the concept of EDLs has found numerous applic...