Water ecosystems

Determination of the content of organochlorine insecticides in the drinking water is primal for establishing the level of contamination of the water ecosystem and for human health protection. 

Malmqvist B, Rundle S (2002) Threats to the running water ecosystems of the world. Environ Conserv 29 134—153... 

Jury WA, Winer AM, Spencer WF, et al. 1987b. Transport and transformation of organic chemicals in the soil-air-water ecosystem. Rev Environ Contam Toxicol 99 119-164. 

Pesticide Fresh-water ecosystems Organoch lorine Pesticides Marine ecosystems... 

Compounds of this series are actively accumulated by the inhabitants of water ecosystems (both plants and animals). It was shown that fish in rivers, polluted with dioxin-containing industrial wastewaters, could accumulate up to 0,1-0,2 mcg/kg. As much as 80% of dioxin is laid in fish skeleton and visceral fat about 10% comes in liver, and 2% - in muscles. 

Ali AMS (2003) Farmers knowledge of soils and the sustainability of agriculture in a saline water ecosystem in Southwestern Bangladesh. Geoderma 111 333-353... 

A similar description is used for water ecosystems with fish species. 

Experimental studies of PCBs and DDT transformation in marine waters showed that PCBs inhibited decomposition of DDT at the concentration ratio of DDT to PCBs of 1 100-1 200 that may lead to prolongation of circulation time and toxic effect of this compound at water ecosystem (Tuteliyan and Lashneva, 1988). It is also known that in the past, PCBs were often added to HCH to increase the longevity of the insecticide (Mel nikov, 1974). 

Chemical Dynamics in Fresh Water Ecosystems. Gobas, F.A.P.C. and J.A. McCorquodale, Eds. Lewis Publishers Ann Arbor, Michigan. 

Thomann, R.V., J.P. Connolly, and T. Parkerton. 1991. Modeling accumulation of organic chemicals in aquatic food-webs. In Chemical Dynamics in Fresh Water Ecosystems, F.A.P.C. Gobas and J.A. McCorquodale, Eds., CRC Press/Lewis Publishers. 

Markose PM, Eappen KP, Raghavayya M, et al. 1982. Bioaccumulation of radium in a fresh water ecosystem. In Vohra KG, ed. Natural radiation environment Proceedings of the 2nd special symposium on natural radiation environment, held at the Bhaba Atomic Research Centre, Bombay, India, during January 19-23. New Delhi, India Wiley Eastern Ltd., 234-238. 

The regular dependence of water ecosystems on biogeochemical cycles... 

Heavy metals. The most common heavy-metal pollutants are arsenic, cadmium, chromium, copper, nickel, lead, and mercury. Some metals, such as manganese, iron, copper, and zinc, are essential micronutrients. Each type of heavy metal in its own way affects water ecosystem biochemistry and can accumulate in bottom deposits and in the biomass of living elements. 

Can chemical compounds of biogenic type transported at long distances cause changes in water ecosystems and over territories that have a low level of biogenic provision (e.g., high mountains) ... 

Ground water t/2 = 470-2880 h, based on data from anaerobic ground water ecosystem study (Wilson et al. 1986 quoted, Howard et al. 1991) and data from an aerobic ground water ecosystem study (Swindoll et al. 1987 quoted, Howard et al. 1991). 

Power ME, Brozovic N, Bode C, Zilberman D. 2005. Spatially explicit tools for understanding and sustaining inland water ecosystems. Front Ecol Environ 3 47-55. 

Estuary Region of interaction between rivers and near-shore ocean waters, where tidal action and river flow mix fresh and salt water. Such areas include bays, mouths of rivers, salt marshes, and lagoons. These brackish water ecosystems shelter and feed marine life, birds, and wildlife. 

Jprgensen, N.O.G, Kroer, N., Coffin, R.B., and Hoch, M.P. (1999) Relations between bacterial nitrogen metabohsm and growth efficiency in an estuarine and an open water ecosystem. Aquat. Microb. Ecol. 18, 247-261. 

J, negative impact of chlorine containing effluents on receiving water ecosystems thus, effective dechlorination using sodium bisulfite (NaHSOs) solutions is increasing the salinity of effluents ... 

Briand, J.F., Jacquet, S., Bemar4 C., and Humbert, J.F. 2003. Health hazards for terrestrial vertebrates from toxic cyanobacteria in surface water ecosystems. Vet Res 34, 361—377. 

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