What are the ecological impacts of biomass harvesting for energy?

Biomass harvesting for energy – latest scientific knowledge on the ecological impacts in Nordic forests
Wednesday 5th April 2017 at 9–16, Viikki Infocenter (Viikinkaari 11), Auditorium 2, University of Helsinki

More intense biomass harvesting, including residues and stumps, has become a common practice in Finnish forestry – but what are the ecological impacts? How is the soil affected, is there a sustainable quota in terms of harvesting of different biomass compartments, and what happens to tree growth and carbon balance? These questions among others are addressed 5.4. in Helsinki at a seminar organized by the forest soil science researchers of the University of Helsinki. The recent results from the project “Soil changes and long-term ecosystem recovery from chemical and physical load” supported by Maj and Tor Nessling foundation will be presented along with the latest research results from the Nordic region. The seminar will be organized in English and everyone is welcome to attend.


9.00 – 9.10 Opening; Prof. Heljä-Sisko Helmisaari, University of Helsinki

9.10 – 10.00 What is the highest sustainable level of harvesting slash and stumps for energy in Sweden? Summary of Swedish research on the environmental impacts of forest energy; Assoc. prof. Bengt Olsson, Swedish University of Agricultural Sciences

10.00 – 10.40 Birches and alders as short-rotation species for biomass production – results from long-term research in Estonia; Prof. Veiko Uri, Estonian University of Life Sciences

10.40 – 11.10 Forest biomass use for energy – present situation and future trends; Dr. Johanna Routa, Natural Resources Institute Finland

11.10 – 12.20 Lunch break (own cost)

12.20 – 12.50 Stump harvesting, surface disturbance and time – changes in soil C and N dynamics; M.Sc Lilli Kaarakka, University of Helsinki

12.50 – 13.20 Logging residue harvest on mineral soils: Effects on soil properties and tree growth; Doc. Aino Smolander, Natural Resources Institute Finland

13.20 – 13.50 Tree biomass components as nutrient sources – nutrient balances and sustainability; Doc. Marjo Palviainen, University of Helsinki

13.50 – 14.20 Biomass harvesting for energy in peatland forests; Prof. Raija Laiho, Natural Resources Institute Finland

14.20 – 14.40 Coffee (served)

14.40 – 15.10 Effects of stump and residue harvesting on the carbon balance and climate impact of forests; Prof. Jari Liski, Finnish Meteorological Institute

15.10 – 15.40 Forest bioenergy for climate mitigation – carbon rules but do we understand other climate agents; Dr. Tuomo Kalliokoski, University of Helsinki

15.40 ¬– 16.00 Discussion and final words

No pre-registration is needed, the seminar is open to all interested. More information:

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