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Contribution to the evaluation of usability of surface water from the "Gornji Banat" meliorated region [Serbia, Yugoslavia] for irrigation
1998
Vidovic, M. (Zavod za zastitu zdravlja, Kikinda (Yugoslavia)) | Cupic, S. | Kilibarda, P. | Medarevic, S.
The paper summarizes the results on the quality of surface water of the Gornji Banat region (Serbia, Yugoslavia). Based on different classifications, statistic data processing was made and the conclusions on the usability of the water for irrigation are given. According to the results obtained there is an urgent need for efficient measures to improve the quality of canal water and the control the polluters.
Show more [+] Less [-]Biomanipulation in eutrophication process control
1998
Maletin, S. (Univerzitet u Novom Sadu, Novi Sad (Yugoslavia). Poljoprivredni fakultet) | Djukic, N. | Miljanovic, B. | Teodorovic, I.
Amplified and accelerated eutrophication process is a characteritic of a whole variety of small and medium-sized water-bodies, such as channel systems, microreservoirs, ponds, lakes and bank regions of many even bigger ecosystems. During the process, in relatively short period of time, the upper capacity limit of a certain biotop is far too exceeded, which leads to reduced ability of ecosystem's autopurification. As a consequence of such degradation, ecosystem faces a serious discrepancy between members of a biocenosis e.g. in ration producers/consumers/decomposers, which, in the end, causes destruction, e.g. dystrophy of the hydroecosystem. The introduction of diverse fish communities, can, therefore, be one of the basic measures for enabling a sustainable trophic stability, in a sense of keeping a dynamic balance. This measure includes carefully planed fish community - it should consist of three basic components of a trophic food web (planktivore and macrophytovore, bentivore and carnivore). Apart from enabling certain biodiversity considering particular fish species (both quantitative and qualitative), care must be inevitably taken of age structure, as well as fish stock and fishing dynamic, concerning the number, quantity and age.
Show more [+] Less [-]Nitrogen enrichment of European inland and marine waters with special attention to Danish policy measures
1998
Iversen, T.M. | Grant, R. | Nielsen, K. (National Environmental Research Institute (Denmark))
Nitrogen, the Confer-N-s
1998
Manning, W.J. | Dempster, J.P. (eds.) (Department of Microbiology, University of Massachusetts, 203 Morrill Science Center IVN, Box 35720, Amherst, Massachusetts 01003-5720 (USA))
