Lake management and lake restoration

Graduate course arranged by the Biology Department, University of Southern Denmark (SDU), Denmark and the Leibniz-Institute of Freshwater Ecology and Inland Fisheries (IGB), Berlin, Germany.

Application deadline June 1st, 2017

The course focuses on understanding natural lakes in their watershed (geochemistry, surface water and ground water balances, climate, biology) and how human activities have altered chemical conditions, nutrient recycling, and trophic structure in lakes. It includes lectures, practicals, field work and excursions with time for discussion and student presentations. Lectures aim at giving an overview of the subject of limnology and the challenges in managing and restoring lakes as healthy ecosystems under the stress from nutrient run-off and climate change. Lectures will be accompanied by practical’s training the students in solving management related issues, and field work to give the students hands-on experience of e.g. sediment and macrophyte sampling. The applicants will be evaluated through group presentations of practicals.

Tentative program for 2017:

Before arrival:
Reading of literature (selected book chapters and papers) app. 200 “normal” pages (that is like 10 papers). Will be announced later. 
Saturday 29th Arrival before 2 p.m. Presentation of course and participants. Evening: Speed presentations of each Ph.D. project (or Master project if master students participate). 
Sunday 30th: Lecture 1: Lakes and their connectivity to the watershed (water cycle, weathering processes). Productivity and eutrophication. Role of phosphorus (P). Vollenweider. Danish problems – losses from agriculture (Henning S. Jensen, SDU).
  Exercise: Calculate secchi depth in a Danish lake from land-use in the watershed. (Henning S. Jensen, SDU) 
  Follow-up: The special conditions in shallow, polymictic lakes.
  Lecture 2: Ecological engineering of natural processes in eutrophic lakes to enhance water quality (Michael Hupfer, IGB). 
  Walk and boat trip on Lake Arreskov. Sample a sediment core, measure Secchi depth. 
  Lecture 3: In-lake geoengineering: Mobile P in sediment and sediment capping techniques (Kasper Reitzel, SDU).
  Exercise: Dose calculation for sediment capping (Kasper Reitzel, SDU) 
  Laboratory experiment: Start experiment with sediment cores from Lake Store Søgaard. 
Monday 31st Lecture 4: Experiences with use of aluminum in Danish lakes and lakes worldwide. Lake Vedsted case story – the potential risk when using aluminum. (Henning S. Jensen, SDU). 
  Lecture 5: German case stories; Lake Haussee and Lake Arendsee (Michael Hupfer, IGB) 
  Lecture 6: Methods to trap P from diffuse run-off (Sara Egemose, SDU) 
  Lecture 7: Macrophytes and their role in lakes (Sabine Hilt, IGB)  
  Excursion to Lake Arreskov to sample macrophytes
  Lecture 8: The role of groundwater exfiltration in lakes (Bertel Nilsson, GEUS)
Tuesday 1st Excursion: Visit to Fillerup IBZ (Intelligent Buffer Zone)(trapping of N and P from agricultural drainage water), Lake Væng (ground-water seepage, biomanipulation), Lakes Hampen (Isoetid vegetation, ground-water seepage, swimming with mask and snorkel?)  
Wednesday 2nd Lecture 9: Trophic structure in lakes along nutrient and climate gradients. Resilience in trophic structure and biomanipulation as a restoration tool. Experience with biomanipulation in Danish lakes (Torben Lauridsen, Martin Søndergaard, AU-DCE). 
  Lecture 10: EU- Water Framework Directive and its administration (Martin Søndergaard) 
  Lecture 11: Water quality parameters in lakes in relation to EU WFD (Martin Søndergaard, AU-DCE) 
  Short lecture: Calculation of P mass-balances in lakes (Michael Hupfer, IGB)
  Walk in Svanninge Bjerge 
  Short lecture: Decision support system for restoring lakes (Michael Hupfer, IGB) 
  Short lecture: Introduction to group work
Thursday 3rd Group work 
  Short lecture: A dynamical mass balance model to predict the response to reduced external P-loading (Mogens Flindt, SDU) 
  Group work 
  Experiment: Measure phosphate release in sediment cores (Kasper Reitzel, SDU)
  Group work 
Friday 4th Group work: Preparation of power-point presentations 
  Presentation of results from the experiment (Kasper Reitzel, SDU)
  Group work: Presentations 
  General and closing remarks: International freshwater science communities 
  Dinner with wine
Saturday 5th: Departure, transport to Odense railway station 


Time: 29th July-5th August 2017, with reading of relevant papers prior to start.
Location: The field station of the Biology Department, University of Southern Denmark. The station is located in Southern Funen close to the town of Faaborg.
Teachers: Experts from Denmark and Germany.
Participants: Strict priority is given to students enrolled in a PhD-program at their home universities. MSc-students and postdocs may attend if space permits. The maximal number of participants is 24.
Fees: 3.000 DKK to cover tuition, transport during course, accommodation, and all meals.
Language: English
ECTS points: 5
Application procedure: The application should contain a CV of the student and a short (max. ½ page) description of their background.
The application should be e-mailed to by 1st June. The successful applicants will be notified of acceptance by 5th June.
Course manager: Kasper Reitzel ( & Henning S. Jensen ( Department of Biology, University of Southern Denmark, Campusvej 55, DK- 5230 Odense M, Denmark.
Michael Hupfer (, Department of Chemical Analytics and Biogeochemistry, Leibniz-Institute of Freshwater Ecology and Inland Fisheries, Berlin, Germany

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