Through intense collaboration between geologists, ecologists, biogeochemists and modellers we will establish a sound scientific basis for nutrient management in the Baltic Sea to reduce hypoxia and re-establish desired ecosystem services. Our specific objectives include:

-  Investigate trends in hypoxia on both short-term (<100 years) and long-term (<10000 years) scales to identify relationships to climatic and anthropogenic trends and oscillations. These analyses serve as a basis for developing more precise and detailed models for understanding hypoxia in the Baltic Sea over millennial time scales and will put scenarios for present nutrient reductions and climate change into a wider perspective.

-  Understand and quantify the relationships between oxygen concentrations, benthic organisms and biogeochemical processes. Low oxygen concentrations gradually change the benthic community from deep-burrowing organisms to hypoxia-tolerant, rapid colonizing species living on the sediment surface (Pearson and Rosenberg 1978), and eventually the entire macrofauna community may become eradicated decreasing the efficiency of the biogeochemical processing of organic matter. These processes and feed-backs must and will be incorporated into models to understand effects of hypoxia.

-  Obtain an improved description of the governing mechanisms in different regions of the Baltic Sea for the biogeochemical processes that allows for upscaling field sampling to a holistic ecosystem assessment. Describe the statistical properties of oxygen supply to bottom waters on regional and local scales for past and future climate scenarios. The balance between oxygen supply and consumption will be assessed through improved modelling of the physical transports coupled with the biogeochemical processes.

-  The overall goal is to combine the new knowledge gained in HYPER in such a way that it can be used in the Baltic Nest Institute (BNI) modelling framework for nutrient management in order to evaluate the costs of nutrient reductions as compared to valuation of Baltic Sea ecosystem resources.

Henvendelse om denne sides indhold: 
Revideret 03.09.2015

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DCE - Nationalt Center for Miljø og Energi
Aarhus Universitet
Frederiksborgvej 399
Postboks 358
4000 Roskilde

E-mail: dce@au.dk
Tlf: 8715 5000

P-nr: 1003405451
EAN-nr: 5798000867000
Stedkode: 72700

Velkommen til DCE

Velkommen til DCE - Nationalt Center for Miljø og Energi. Centret er indgangen for myndigheder, erhverv, interesseorganisationer og offentligheden til Aarhus Universitets faglige miljøer inden for natur, miljø og energi. Læs mere om centret i denne folder.

DCE - Nationalt Center for Miljø og Energi leverer rådgivning og viden om natur, miljø og energi baseret på forskning af høj kvalitet og bidrager dermed til den nationale og internationale samfundsudvikling.

DCE - Nationalt Center for Miljø og Energi udspringer af det pr. 30. juni 2011 nedlagte Danmarks Miljøundersøgelser (DMU). Danmarks Miljøundersøgelsers forskningsafdelinger hører nu til på Institut for Bioscience og Institut for Miljøvidenskab.