Freshwater Biology Section Who are we? Ole Pedersen Professor Kaj Sand-Jensen Professor Kirsten S. Christoffersen Professor Dean Jacobsen Associate professor Jens Borum Associate professor Theis Kragh Associate professor Senior staff. You have most likely meet at least some of us And a number of PhD-, master- and bachelor-students Lars Båstrup Spohr Assistant professor Kenneth Martinsen Videnskabelig assistent

Freshwater Biological Laboratory Where are we ? Freshwater Biology Section Universitesparken 4, 3. floor Zoological Museum We are here in AK lecture theatre

Freshwater Biological Section What are we doing? Research on: Wetlands, streams, lakes and estuaries (DK, Australia, Ecuador, Greenland etc.) Structure and functioning of ecosystems Organic matter, nutrient and gas dynamics in ecosystems Distribution and diversity of organisms Eutrophication, climate change and land use changes Eco-physiology of aquatic plants and animals Nature management and restoration Cycling of matter in these ecosystems

Freshwater Biology Section Our lab: Nature Facilities

Freshwater Biology Section Climate rooms

Freshwater Biology Section Glass house facility

Freshwater Biology Section Basic lab facilities Advanced HPLC Isotopes Microelectrodes Carbon analyses Microscopy Differing aims

Freshwater Biology Section Workspace for 20 students

Freshwater Biology Section More? Free coffee Morning and lunch breaks Nice social atmosphere Extremely cute supervisors What are the more specific areas we focus on?

Arctic food webs and climate changes How do plankton and benthos cope with a short summer and long winter darkness? Impact of prolonged ice-free season and warmer waters Implications of migrating birds (geese) mediating nutrients Arctic charr as top predator and how it responds to climate changes Contact: Kirsten Christoffersen kchristoffersen@bio.ku.dk

Biodiversity and community structure in high altitude lakes Exploration of pristine high altitude lake ecosystems Which adaptions are needed to survive at high altitudes? The role of glacier runoff on community structure and biodiversity What happens with increased Global warming? Contact: Kirsten S. Christoffersen kchhristoffersen@bio.ku.dk Dean Jacobsen djacobsen@bio.ku.dk

Dreissena polymorha (zebra mussel) Abundance, distribution and success of the mussels in lakes? Implications for native plankton and benthic invertebrate populations Potential use in lake biomanipulation? Tolerance to anoxia and cyanobacterial toxins Contact: Kirsten Christoffersen kchristoffersen@bio.ku.dk

Brownification of lobelia lakes Sources and leaching of humic substances from the catchment area Break-down mediated by UV light or pelagic bacteria Historical development hereunder the past effect of acid rain Impact upon threatened aquatic plants in pristine lakes Contact: Ole Pedersen opedersen@bio.ku.dk

Ole Pedersen opedersen@bio.ku.dk Flooding tolerance Superhydrophobic leaves and influence of leaf gas films on gas exchange Interaction of multiple stress upon submergence tolerance Water proofing crops – a step towards supercharged plants Contact: Ole Pedersen opedersen@bio.ku.dk

Inorganic carbon use in a climate scenario Importance of carbon concentrating mechanisms (CCM) to reduce photorespiration Temperature, carbon and CCM interactions Tolerance to prolonged tissue anoxia in submerged plants Contact: Ole Pedersen opedersen@bio.ku.dk

Tissue tolerance to anoxia or hyperoxia Tolerance to prolonged tissue anoxia in macroalgae Tolerance to hyperoxia – up to 80% O2 Impact of rising temperatures upon O2 balance and O2 amplitudes – and natural distribution Polar gigantism Contact: Jens Borum jborum@bio.ku.dk

Structure and function of running waters Spatio-temporal dynamics of macroinvertebrates Biotic interactions of among macroinvertebrates Production and conversion of organic matter Environmental assessment and monitoring Contact: Dean Jacobsen djacobsen@bio.ku.dk

Ecology of alpine streams Effect of water source on diversity, composition and function of communities Short-term and seasonal dynamics Organismal adaptations to a cold, alpine environment Treats and management of pristine alpine running waters Contact: Dean Jacobsen djacobsen@bio.ku.dk

Dean Jacobsen djacobsen@bio.ku.dk Phenotypic plasticity & adaptation to ambient oxygen and temperature levels Microrespirometry of adaptation in metabolic rate, temperature dependency and oxy-regulatory capacity Evaluating possible implications for the use of macroinvertebrates in biomonitoring Using eco-physiology to predict future distribution patterns Contact: Dean Jacobsen djacobsen@bio.ku.dk

Diversity of aquatic plants Biodiversity and ecosystem ecology of re-established lakes Rare and threatened species (charophytes) Trait-based ecology of aquatic plants Cattle on land and plants in water Contact: Lars Båstrup-Spohr lbaastrupspohr@bio.ku.dk

Lake ecology and restoration Plant communities and resurrection of the dead Responses to oligotrophication Changes in ecosystem metabolism Responses to climate change Contact: Kaj Sand-Jensen ksandjensen@bio.ku.dk

Lake ecosystem processes Whole Lake metabolism Role of nutrients, light and CO2 in lake productivity Oxygen dynamics and fish kills Contact: Theis Kragh tkragh@bio.ku.dk Contact: Kaj Sand-Jensen ksandjensen@bio.ku.dk

Freshwater Fish Ecology Population size of large pike “Personality” of fish populating new lakes Contact: Theis Kragh tkragh@bio.ku.dk

Lake ecosystem processes Carbon dioxide and methane release from lakes and soil Role of freshwater ecosystems in national and global carbon balances Contact: Kenenth Thorø Martinsen kenneth.martinsen@bio.ku.dk 26/11/2018

or via link on section website at BIO Aquatic Science All topics in freshwaters in addition to seagrasses and macroalgae in the sea Slides and contact information available at: www.bio-web.dk/fbl-projects.pdf or via link on section website at BIO