Forest soil seminars and events

Forest Soil Seminars, 2018 –

Since January 2018 we have organised Viikki soil science seminars jointly at Viikki campus, see

Viikki Soil Science seminar gathers scientists and students of the campus to hear, learn and discuss of topics that focus on soils, their characteristics and processes, above-belowground interactions, interactions between soils and the environment, and various soil-related studies that span from molecular to global scales. The main aim is to share recent scientific findings and ideas, and connect people

Recent Ph.D defenses


Maiju Kosunen  defended her thesis Insect and storm disturbance in boreal forests – predisposing site factors and impacts on ecosystem carbon on 4.9.2020. The opponent was Associated Prof.  Johan Stendahl, Swedish University of Agricultural Sciences, Sweden.


Lilli Kaarakka defended her thesis Soil changes and long-term ecosystem recovery from physical and chemical load –stump harvesting and sprinkling infiltration as case studies on 9.11.2018. The opponent was Prof. Dan Binkley, Northern Arizona University, USA.

On Wednesday and Thursday 7-8.11.2018, before the defense, the Opponent Prof. Dan Binkley gave lectures on Designing and Publishing Strong Research Projects, How to make effective oral presentations, Forest Soils Always Change across Space and Time and Four Decades of ForestProductivity – patterns, processes, and mysteries.


Sylwia Adamczyk defended her thesis Role of terpenes in carbon and nitrogen cycling in boreal forest soils on 28.10.2016  and there was a pre-defence seminar on Forest soil C and N processes in a changing environment the day before. The opponent was Assoc. Prof. Mona Högberg from the Swedish University of Agricultural Sciences at Umeå.

Opponent and pre-reviewers

Earlier Forest Soil Seminars

Autumn 2017

Thursday 16.11.2017 at 14.00 – 15.30, Seminar room 332, Viikki B-building

Kristiina Karhu: Priming effect in boreal forest soils along a fertility gradient

Elisa Halmeenmäki: The role of methanogens and methanotrophs in the CH4 fluxes in boreal ecosystems

Tiina Törmänen: How logging residues of different tree species affect soil N cycling and losses after final felling?

Biomass harvesting for energy – latest scientific knowledge on the ecological impacts in Nordic forests

Research seminar, Wednesday 5th April 2017 at 9–16, Viikki Infocenter, Auditorium 2, Funding: Nessling Foundation

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 Science

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 Univ. 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 – 14.10          Biomass harvesting for energy in peatland forests: effects on site nutrient pools;  Prof. Raija Laiho, Natural Resources Institute Finland

14.10 – 14.30          Coffee (served)

14.30 – 14.50          Do logging residue piles trigger extra decomposition of soil organic matter?  Dr. Paavo Ojanen, University of Helsinki

14.50 – 15.20          Effects of stump and residue harvesting on the carbon balance and climate impact of forests; Prof. Jari Liski, Finnish Meteorological Institute

15.20 – 15.50         Forest bioenergy for climate mitigation – carbon rules but do we understand other climate agents; Dr. Tuomo Kalliokoski, University of Helsinki

15.50 ­– 16.00        Final words


Spring 2017, Forest soil seminars

Thursday 6.4 at 14, Forest Sciences, B-buiding, 3rd floor, seminar room 332

Theme: Roots and mycorrhiza
Yiyang Ding: Fine root biomass and longevity between birch and understory vegetation in Northern Finland

Rabbil Bhuiyan: Estimating fine root production in boreal peatlands – a methodological perspective

Heikki Kiheri: Effects of long-term nitrogen fertilization on ericoid mycorrhization at Whim Bog

Thursday 2.3 at 14, Forest Sciences, B-building, 3rd floor, seminar room 332

Theme: Environmental and biotic changes/disturbancies

Maiju Kosunen: Storm and bark beetle outbreak effects on carbon dynamics in boreal spruce stands

Qian Zhao: Response of soil microbial community to seasonal change in precipitation in subtropical forests

Bartosz Adamczyk: How mycorrhizal plant-soil interactions affect formation and degradation of soil organic matter in boreal forest