Phytoplankton groups are one of the major quality element to be used in evaluation trophic and ecological state freshwater ecosystems according EU Water Framework Directive. This research was made assess status Lake Bafa Turkey, on basis phytoplankton communities. Büyük Menderes River is most important factor that carries pollutants Bafa. The eight sampling station were assigned evaluate lake. ...

Abstract This paper presents data compilation for invertebrates and protists indicator taxa of organic pollution trophic state continental waters. Information was collected from research papers, monographs, electronic resources, our own research. Altogether 1732 Kingdoms Protista, Protozoa, Chromista, Animalia 19 taxonomical Phyla are represented with ecological preferences saprobity index (S) ...

Soil use and occupation alter the physicochemical biological processes of aquatic ecosystems. Urban streams are fundamental components macro-drainage system cities; however, with advance urbanization, most modified to point that they no longer recognized as but sewage receptors. Physical diagnosis monitoring water quality essential understand trophic state these ecosystems in relation environme...

Exploited ecosystems are characterised by exports of secondary production from each fished trophic level that reduce the energy available for upper levels at the ecosystem scale, thus impinging on overall secondary production. Depletion in secondary production is proposed here as a proxy for quantifying the ecosystem effects of fishing. Theoretical analysis of trophic web interactions permits t...

The nutrient and trophic status were used to assess the impact of human activities on lagoon by determining the trophic status of the lagoons and then using nutrient parameters and transparency in a form of model to predict the trophic status index (TSI) of the lagoon waters. The trophic index of Benya, Nakwa, Amisa and Nyanya ranges between 35.0– 39.0 and falls within Carlson’s TSI range scale...

Models of biomass size spectra assume that organisms with higher body mass feed at higher trophic levels, but explicit empirical tests of this pattern are rare. We used nitrogen stable isotopes (δ15N) as an index of the trophic level in a benthic fish and invertebrate size-spectrum, and demonstrated that body mass was positively and significantly related to trophic level. This pattern was consi...

Ratio-dependent and prey-dependent models of trophic interactions make very different predictions about the steady-state (equilibrial) properties of ecosystems, such as the response of equilibrium abundance and biomass of organisms in each trophic level to increased primary productivity or nutrient input. Prey-dependent heory predicts alternating positive, negative, and zero responses of trophi...