Description: Das Projekt "Vorhersage zur Qualitaet aquatischer Oekosysteme mittels kuenstlicher neutraler Netzwerke: Auswirkungen von Umweltmerkmalen auf die Struktur aquatischer Gemeinschaften (Algen, bethonische und Fischfauna)" wird vom Umweltbundesamt gefördert und von ARC Systems Research GmbH durchgeführt. Objective/Problems to be solved: Setting aside historical factors, the structure and diversity of aquatic communities in running waters is primarily dependent on a complex of physical, chemical and biotic factors. Physical and chemical variables taking place inside the hydrosystem are heavily dependent on climatic and catchment natural properties (hydrology, geology, topography, etc.), but are also strongly influenced by anthropogenic impacts (hydraulic management, land use and agricultural practices, waste water discharge, etc.). In the purpose to really assess the ecosystem health, with the object of better managing it or of restoring its integrity in the future, the problem is to make the part between the natural variability of the ecosystem conditions and biocenosis variation in one hand, and the anthropogenic alterations and their effects on the other hand. Now for several decades, hydrobiological studies have identified the main factors determining freshwater communities, but very few have been able to really establish deterministic links between ecological factors and the structure of key aquatic communities. Despite these uncertainties, key aquatic communities have been utilised to evaluate environmental and biological quality of streams and rivers. Practical methods for calculating 'biotic indices' have been designed, with the requirement that they be simple enough to be applied in routine surveys. As a result, a variety of standard methods have been proposed and used for assessing water quality in different river orders, often without regard to a reference to the natural state of the community. By contrast, recent approaches based on the concept of ecosystem integrity and biodiversity are more promising, especially for integrated water management. The goal of the project is to develop general methodologies, based on advanced modelling techniques which will be utilised both for assessing the ecosystem status, and predicting structure and diversity of key aquatic communities (benthic diatoms, benthic micro-invertebrates and fish), under natural (i.e. undisturbed by human activities) and under man-made disturbance (i.e. submitted to various pollutions, discharge regulation, etc.). Scientific objectives and approach: The main scientific objectives will be i) setting up a standardised methodological approach (we have defined a set of technical procedures which will be used in a common framework to analyse or to predict community structure of studied ecosystems; each reference site is sampled in a standardised way and this will allow to compare different sites for regional conservation priorities);... Prime Contractor: Universite Paul Sabatier de Toulouse III, Centre d'Ecologie des Systemes Aquatiqoues Continentaux; Toulouse/France.
SupportProgram
Origin: /Bund/UBA/UFORDAT
Tags: Main ? Fisch ? Fluss ? Biopharmazeutikum ? Abwassereinleitung ? Diatomeen ? Fließgewässer ? Gewässerbelastung ? Umweltauswirkung ? Tiergesellschaft ? Chemikalienmanagement ? Benthos ? Biozönose ? Fischfauna ? Hydraulik ? Wirbellose ? Süßwasser ? Topographie ? Staatenvereinigung ? Algen ? Ökosystemzustand ? Bioindikator ? Biotischer Faktor ? Ökologische Bewertung ? Aquatisches Ökosystem ? Ökosystemmodell ? Standardmethode ? Standortwahl ? Studie ? Wasserqualität ? Modellierung ? Bauliche Anlage ? Chemische Stoffeigenschaft ? Flächennutzung ? Bewertungsverfahren ? Geologie ? Chemikalien ? Bewirtschaftungssystem ? Umweltqualität ? Hydrologie ? Wasserwirtschaft ? Wirtschaftliche Aspekte ? Anthropogener Einfluss ? Umweltschutz ? Raumstruktur ? Ökologischer Faktor ? Ökosystem ? Biodiversität ? Naturhaushalt ? Soziale Aspekte ? legislation, regulations ? renewable sources of energy ? scientific research ? other energy topics ? polices ?
License: cc-by-nc-nd/4.0
Language: Deutsch
Time ranges: 2000-02-29 - 2003-02-28
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