Modelling Community Structure in Freshwater Ecosystems
Sovan Lek, Michele Scardi, P.F.M Verdonschot, J.-P. Descy, Young-Seuk Park
Springer Science & Business Media, Dec 5, 2005 - Science - 518 pages
The landmass on which we live is an integral part of our water catchment. Any human - tivity will inevitably have some consequences on the availability and composition of fresh waters. These consequences are becoming increasingly important and detectable as the - man population grows. The problem is to be addressed at the global scale, as frequently, decisions made have inter-regional and international impacts, and must therefore be coor- nated. In a number of European Member States, for example, the availability of water - sources depends on the activities of other upstream countries. The demand for fresh water in Europe, as well as in the world, is increasing. There is an upward pressure on European water demand for public supplies (drinking water, recreation, etc. ), for industry, and for - rigated agriculture. The ecological impacts of different uses are complex, and currently not always predictable. This book should help planners in their decisions on different water management options for human use. Water, of course, is not only relevant as a resource, exploited for human activities, but it is also relevant to aquatic ecosystems and to their quality. Preservation and restoration of the ecological quality of these ecosystems have a major social impact, as it has been stressed in several European Community actions.
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abundance Achnanthidium ADMI algorithm alkalinity altitude analysis ANN models aquatic artificial neural networks assessment basin benthic benthic diatom benthic macroinvertebrate biological biotic Cemagref characteristics Chon classes classification clusters coefficients community structure complex composition correlation corresponding cyanobacteria database dataset defined Descy developed diatom diatom assemblages distance distribution ecoregions ecosystems environmental variables factors fish assemblages function Garonne Giraudel Gomphonema gradient groups Gutland habitat impact indicator Kohonen Lake Kasumigaura Lange-Bertalot linear macroinvertebrate methods MIR-max multivariate Nakdong River Navicula neurons Nitzschia Oberdorff observed Oesling ordination output layer PAEQANN parameters patterns percentage phytoplankton Pilica pollution predicted Recknagel region regression river rule-based sampling sites saprobity scale selected self-organizing map sensitivity set-covering showed similar species richness statistics strategy streams subset SVMs Table taxa taxon techniques temperature tion values visualisation water quality weight vector Wolbórka Zwalm