Description: Das Projekt "AQUATOXAL: Umweltmanagement von Aquakulturanlagen und oekologische Wechselwirkungen giftiger Phytoplanktonentwicklungen in Suedamerika - Teilprojekt: Auswirkungen intensiver Lachszucht auf Benthos und Biogeochemieentwicklung eines Sedimentationsmodel" wird vom Umweltbundesamt gefördert und von Universität Kiel, Institut für Meereskunde, Abteilung Fischereibiologie durchgeführt. The main objective of this work will be to develop the technical support for aquaculture and fisheries management, in relation with the interactions between environmental alterations and marine ecosystems, including biological parameters as growth regulation of planktonic algae. This will be obtained through specific objectives determination of the environmental fish-farming effects on marine ecosystem, and identification of the factors involved in the development of noxious phytoplankton development, in the South of Latin America. The main ecological effects associated with cage farming (not regarding contaminants by antifoulants, antimicrobials and genetic aspects) are dissolved nutrients and particulate organic matter introductions. All associated biogeochemical and ecological effects at the seaflor are triggered by increased sedimentation of organic material. These effects are comparable to those that originate from other anthropogenic sources (such as sewage, agriculture and tourism) and can be incorporated into a general scheme of anthropogenic disturbances as a base for regional Coastal Zone Management (CZM) considerations. The water, and ultimately the sediments, are end-point receivers (Cairns et al. 1992) of all anthropogenic inputs. The study of benthic disturbance is therefore a mandatory aspect in assessing environmental impacts of cage fish farms, particularly as fish farms impact on the underlying benthos is far more prominent than on the water column (Holmer & Kristensen 1992). The development of mathematical models has enabled very precise predictions of organic matter accumulation depending on natural features such as water currents, water depth and bottom topography. lt is the aim of the work to provide the mathematical as weIl as the geochemical and biological base for the successful application of a predictive dispersal model of organic material. This will enable, calibrate and justify the use of models for an ecologically oriented site selection of future fish farm facilities in Latin America. Modification in physicochemical qualities of seawater impacted by intensive fish farming in south of Chile will be studied by mathematical modelling. Applied to simulation of physical effects as dispersion, sedimentation, dissolution on the exogenous substances introduced by aquaculture in the coastal water, this tool will provide useful estimation of impact. Considering the parameters currents, chlorophyllian particular charge and algae species, detritical particular charge from fish as uneaten food, faeces, dissolved substances as organics and minerals excreted by reared fish, or released by cages underlayer sediment.
Types:
SupportProgram
Origin: /Bund/UBA/UFORDAT
Tags: Antimikrobielle Substanz ? Biotoppflege ? Lachs ? Kiel ? Naturwerkstoff ? Speisefisch ? Biogeochemie ? Biopharmazeutikum ? Kombinationswirkung ? Fäkalien ? Meerwasser ? Nährstoff ? Phytoplankton ? Umweltauswirkung ? Chile ? Main ? Benthos ? Fischzucht ? Küstengewässer ? Meereskunde ? Marines Ökosystem ? Organisches Material ? Topographie ? Umweltmanagement ? Gelöste Stoffe ? Kanalisationswasser ? Südamerika ? Küstenmanagement ? Gebühr ? Lachsfarm ? Studie ? Wirkungsforschung ? Sediment ? Algen ? Wasser ? Aquakultur ? Ökologische Bewertung ? Stoff ? Aquatisches Ökosystem ? Modellierung ? Management ? Auflösen ? Mathematisches Modell ? Amerika ? Simulation ? Standortwahl ? Abwasser ? Fischereibiologie ? Fischereiwirtschaft ? Ökoeffizienz ? Toxizität ? Fischgewässer ? Dispersion ? Umweltschutzvorschrift ? Gewässergrund ? Sedimentation ? Kenngröße ? Tourismus ? Umweltveränderung ? Landwirtschaft ? Bewirtschaftungssystem ? Mineral ? AQUATOXAL ?
Region: Schleswig-Holstein
Bounding box: 9.75° .. 9.75° x 54.2° .. 54.2°
License: cc-by-nc-nd/4.0
Language: Deutsch
Time ranges: 1997-12-01 - 2001-05-31
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