Description: Das Projekt "The impact of cyanobacterial blooms triggered by nutrient pollution on aquatic environments in the context of climate change" wird/wurde gefördert durch: Schweizerischer Nationalfonds zur Förderung der Wissenschaftlichen Forschung. Es wird/wurde ausgeführt durch: Eidgenössische Anstalt für Wasserversorgung, Abwasserreinigung und Gewässerschutz (EAWAG), Aquatische Umweltanalytik.Background Nutrient pollution that started in the fifties led to eutrophication of lakes all over the world. The construction of waste water treatment plants has reversed this pattern in many countries (e.g. Switzerland) while in other countries (e.g. Romania) lakes still suffer under the consequences of water pollution. The Danube, the second largest river of Europe forms a delta of international importance at the confluence with the Black Sea. Pollution of the Danube, especially before 1990, led to eutrophication of the shallow lakes that, combined with climate change, favoured the development of massive cyanobacterial blooms that currently affect the seasonal succession of plankton and macrophyte communities. This has consequences for fish populations and the whole food web and potential impact on livestock- and human health. The dynamics and environmental context of these blooms is only documented in exceptional cases. Monitoring lakes throughout their phases of pollution and recovery takes decennia and requires a large investment in terms of personnel and resources. Datasets that allow to follow the history of cyanobacterial blooms in polluted lakes are rare, and totally missing for the Danube Delta - a biodiversity hotspot and UNESCO World Heritage Site of global importance. Aims and methods The goal of this research project is to reconstruct: i) the history of cyanobacterial blooms, ii) the occurrence of toxic genes from lake sediments, and iii) the effects of cyanobacteria on locally adapted zooplankton in the Danube Delta. Knowledge about this history is crucial to predict the risk for harmful cyanobacterial blooms in the context of environmental change and their consequences for lake food webs. The formerly hyper-eutrophied lake Greifensee, Switzerland, is an ideal study site to develop the method to reconstruct cyanobacterial blooms from sediment cores: historical data are available for zoo- and phytoplankton and for the population structure of the waterflea Daphnia. This is a key organism in aquatic food webs as it eats the algae and serves as fish food. Extensive field data will be collected from lake complexes in the Romanian part of the Danube Delta, to assess the occurrence of harmful cyanobacterial blooms. (...)
SupportProgram
Origin: /Bund/UBA/UFORDAT
Tags: Algenblüte ? Flussmündung ? Gen ? Speisefisch ? Seen ? Fluss ? Rumänien ? Cyanobakterien ? Eutrophierung ? Kläranlage ? Makrophyten ? Nährstoff ? Phytoplankton ? Umweltauswirkung ? Zooplankton ? Donau ? Abwasserbehandlungsanlage ? Daphnien ? Genotoxizität ? Plankton ? Sedimentanalyse ? Toxin ? Schadstoffüberwachung ? Europa ? Abfall ? Wasserverschmutzung ? Prognosemodell ? Sediment ? Algen ? Risikoanalyse ? Aquatisches Ökosystem ? Ökosystemforschung ? Menschliche Gesundheit ? Studie ? Monitoring ? Forschungsprojekt ? Toxische Substanz ? Daten ? Klimafolgen ? Weltnaturerbe ? Ressource ? Datenerhebung ? Klimawandel ? Ökosystem ? Schadstoff ? Schwarzes Meer ? Risiko ? Informationsgewinnung ? Globale Aspekte ? Biodiversität ? climate-change ? See [Binnengewässer] ?
License: cc-by-nc-nd/4.0
Language: Englisch/English
Time ranges: 2013-01-01 - 2015-12-31
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