Umeå University (UmU)SE-90187 Umeå
Norrbyn, 40 km south of Umeå, Sweden
Description of the infrastructure: The Mesocosm Facility at Umeå Marine Sciences Center (MF-UMSC) has an indoor and an outdoor component. It is located close to the seashore in the northern part of the brackish Baltic Sea (63 °N latitude). The indoor facility consists of 12 cylindrical mesocosms with water columns 4.86 m high and 0.74 m in diameter (volume ca. 2 m3). Temperature can be controlled and manipulated in 3 different sections of each mesocosm. This enables projects that require stratification, controlled convective stirring or both. Projects that require ice can be carried out, and parameters such as freezing or thawing rate can be adjusted. Valoya R-258 (Light DNA) are used as a light source, especially produced with the aim to closely mimic the spectra of the sun. The intake water can either be pumped in directly from the sea or be supplied from elsewhere. Equipment is available for studies requiring intact sediment in the mesocosms. This includes a semi-automatic sediment sampler. The indoor mesocosms are equipped with filters of different mesh sizes, down to 1 μm, and an automatic water renewal system to control turnover rates. The newly established outdoor facility is available during summer. It consists of 4 large pools with temperature-controlled running seawater, each carrying 6 cubic mesocosms of 1 m3 (Fig.9.7 right). Experimental designs can be supported by long-term local time series of ecological variables stored in an easily accessible database on the internet. The facilities can also be used for freshwater studies by running experiments with water from the nearby Öre River.
MF-UMSC is equipped with modern wet and dry labs, several special laboratories, 2 large aquarium halls, 5 walk-in cold rooms, and seagoing research vessels as well as small boats. Various analytical instruments for chemical and biological analyses are available. An auditorium for 50 persons and a classroom laboratory are also available. The direct connection of MF-UMSC with the Departments of Ecology and Environmental Sciences, Chemistry, and Molecular Biology ensures access to additional analytical facilities in environmental and analytical chemistry and molecular biology, as well as expertise of a broad scientific community.
Indoor – pelagic – marine, brackish, (freshwater), 12 tanks of 5 m depth, 2 m3 volume.
Outdoor- pelagic – marine, brackish, (freshwater), 24 tanks of 1 m3. Sediment may be added.
Indoor: Temperature (-1o up to 30o C), stratification depth and strength, convective stirring at different rates, size fractionation of organisms in intake water down to 1 µm, time programs controls light intensity and spectra, adjustable air temperature above the water surface, ice freezing rate, ice thawing rate, adjustable water exchange, chemical parameters.
Outdoor: size fractionation of organisms in intake water (300 – 1 µm), chemical parameters.
Land-sea interactions, climate change, and impact of environmental pollution on organism stoichiometry and health, taxonomic composition, predator-prey interactions, food web processes and efficiency.
Mercury biogeochemistry, Impact of dissolved organic carbon on plankton respiration, growth and food web function, Fish population models and migratory behaviour.