Rauni Strömmer

Person

Description of research and teaching

After completing MSc degree on plant ecology, I focused my research to soil ecology, especially to nitrogen cycling and the role of mycorrhizal fungi and other soil organisms in forest ecosystems. The impact of N fertilization and N deposition on microorganisms and processes in forest soils become the topic of my PhD studies After receiving my PhD degree in 1990, I spent a post-doctoral 10 months at Petawawa National Forestry Institute in Ontario, Canada, where I had an opportunity to study the response of soil microbial community to several silvicultural practices in a large scale plantation ecosystem. After the period (1991-1998) as a lecturer and an associate professor in the University of Oulu, I got my present position as a professor on soil ecology in the University of Helsinki in 1998.

My present research project ‘Organismal diversity and its importance to perceived ecosystem services across ecological gradients’ within a group by Dr Rauni Strömmer, Dr Heikki Setälä, Dr Martin Romantschuk, Dr Ari Jumpponen, Dr Nan Hui and Dr Gaia Francini.

Short description: Human population in urban areas is rapidly expanding. Consequently urban land area is also expanding resulting in greater ecosystem level disturbances and potentially compromised ecosystem services. Our collaborative Finnish-Chinese research project aims to evaluate the loss of biodiversity and concomitant decrease in ecosystem services. Specifically, our project targets the soil microbial communities and the pivotal ecosystem functions they provide in urban park soils. We address these issues by evaluating whether or not the aboveground plant community structure is correlated with richness of microbial communities, how this microbial richness relates to diversity genes involved in carbon and nitrogen cycling, and how the biodiversity and ecosystem services vary across ecological gradients in urbanized milieus.

Other recent activities deal with N cycling in ecosystems, diversity of ectomycorrhizal communities in Pb contaminated forest soil, and the impact of wood ash as a fertilizer on ectomycorrhizae and microbial processes in forest soils.

 

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Further information on the affiliationYmpäristöekologian osaston osastonjohtaja 2014 - Helsingin yliopiston Lahden tutkimus- ja opetusverkoston johtaja 2014 - Bio- ja ympäristötieteellisen tiedekunnan opetuksesta vastaava varadekaani

Highlighted publications

  1. Process rates of nitrogen cycle in uppermost topsoil after harvesting in no-tilled and ploughed agricultural clay soil

    Laine, M. P. P., Rütting, T., Alakukku, L. E., Palojärvi, A. & Strömmer, R. H., 20 Jan 2018, In : Nutrient Cycling in Agroecosystems. 110, p. 39-49

    Research output: Contribution to journalArticleScientificpeer-review

  2. Soil microbial communities are shaped by vegetation type and park age in cities under cold climate

    Hui, N., Jumpponen, A., Francini, G., Kotze, D. J., Liu, X., Romantschuk, M. L., Strömmer, R. H. & Setälä, H. M., 1 Feb 2017, In : Environmental Microbiology. 19, 3, p. 1281–1295 15 p.

    Research output: Contribution to journalArticleScientificpeer-review

  3. Bacterial community structure in atrazine treated reforested farmland in Wuying China

    Liu, X., Hui, C., Bi, L., Romantschuk, M. L., Kontro, M. H., Strömmer, R. H. & Hui, N., 2016, In : Applied Soil Ecology. 98, p. 39-46 8 p.

    Research output: Contribution to journalArticleScientificpeer-review

  4. Analyses of Sporocarps, Morphotyped Ectomycorrhizae, Environmental ITS and LSU Sequences Identify Common Genera that Occur at a Periglacial Site

    Jumpponen, A., Brown, S. P., Trappe, J. M., Cázares, E. & Strömmer, R. H., 2015, In : Journal of Fungi . 1, 1, p. 76-93 18 p.

    Research output: Contribution to journalArticleScientificpeer-review

  5. DOC and CO2-C Releases from Pristine and Drained Peat Soils in Response to Water Table Fluctuations: A Mesocosm Experiment

    Laine, M., Strömmer, R. & Arvola, L., 2014, In : Applied and Environmental Soil Science. 2014, p. 1-10 10 p., 912816.

    Research output: Contribution to journalArticleScientificpeer-review

  6. Layer of organic pine forest soil on top of chlorophenol-contaminated mineral soil enhances contaminant degradation

    Sinkkonen, A. T., Kauppi, S., Simpanen, S. A., Rantalainen, A-L., Strömmer, R. & Romantschuk, M., 2013, In : Environmental Science and Pollution Research. 20, 3, p. 1737-1745 9 p.

    Research output: Contribution to journalArticleScientificpeer-review

  7. Nitrogen Release in Pristine and Drained Peat Profiles in Response to Water Table Fluctuations: A Mesocosm Experiment

    Laine, M., Strömmer, R. & Arvola, L., 2013, In : Applied and Environmental Soil Science. 2013, p. 1-7 7 p., 694368.

    Research output: Contribution to journalArticleScientificpeer-review

  8. Previous exposure advances the degradation of an anthropogenic s-triazine regardless of soil origin

    Sinkkonen, A., Kauppi, S., Pukkila, V., Hui, N., Płociniczak, T., Kontro, M., Strömmer, R. & Romantschuk, M., 2013, In : Journal of Soils and Sediments. 13, 8, p. 1430-1438 9 p.

    Research output: Contribution to journalArticleScientificpeer-review

  9. Cadmium release from afforested peatlands and accumulation in an aquatic ecosystem after experimental wood ash treatment

    Tulonen, T., Arvola, L. & Strömmer, R., 2012, In : European Journal of Forest Research. 131, 5, p. 1529-1536 8 p.

    Research output: Contribution to journalArticleScientificpeer-review

  10. Natural attenuation is enhanced in previously contaminated and coniferous forest soils

    Kauppi, S., Romantschuk, M., Strömmer, R. & Sinkkonen, A., 2012, In : Environmental Science and Pollution Research. 19, 1, p. 53-63 11 p.

    Research output: Contribution to journalArticleScientificpeer-review

  11. Responses of fungal and plant communities to partial humus removal in mid-boreal N-enriched forests

    Tarvainen, O., Hamberg, L., Strömmer, R. & Markkola, A., 2012, In : Journal of Environmental Management. 108, p. 120-129 10 p.

    Research output: Contribution to journalArticleScientificpeer-review

  12. The fate of lead at abandoned and active shooting ranges in a boreal pine forest

    Selonen, S., Liiri, M., Strömmer, R. & Setälä, H. M., 2012, In : Environmental Toxicology and Chemistry. 31, 12, p. 2771-2779 9 p.

    Research output: Contribution to journalArticleScientificpeer-review

  13. Twenty years of research on fungal-plant interactions on Lyman Glacier forefront - lessons learned and questions yet unanswered

    Jumpponen, A., Brown, S. P., Trappe, J. M., Cázares, E. & Strömmer, R., 2012, In : Fungal Ecology. 5, 4, p. 430-442 13 p.

    Research output: Contribution to journalArticleScientificpeer-review

  14. EcM fungal community structure, but not diversity, altered in a Pb-contaminated shooting range in a boreal coniferous forest site in Southern Finland.

    Hui, N., Jumpponen, A., Niskanen, T., Liimatainen, K., Jones, K., Koivula, T., Romantschuk, M. & Strömmer, R., 2011, In : FEMS Microbiology Ecology. 76, 1, p. 121-132 12 p.

    Research output: Contribution to journalArticleScientificpeer-review

  15. Urban forest regeneration: Responses of Scots pine seedlings to partial humus removal in mid-boreal N-enriched forests

    Tarvainen, O., Strömmer, R. & Markkola, A., 2011, In : Landscape and Urban Planning. 102, 4, p. 209-214 6 p.

    Research output: Contribution to journalArticleScientificpeer-review

  16. Influence of lead on organisms within the detritus food web of a contaminated pine forest soil

    Hui, N., Selonen, S., Hanzel, J., Tuomela, M., Rainio, A., Kontio, H., Hakala, K., Lankinen, P., Steffen, K., Fingerroos, T., Strömmer, R., Setälä, H. M., Hatakka, A. & Romantschuk, M., 2009, In : Boreal Environment Research. 14, suppl. A, p. 70-85 16 p.

    Research output: Contribution to journalArticleScientificpeer-review

  17. Testing the homogenizing effect of low copper sulfate concentrations on the size distribution of Portulaca oleracea seedlings in vitro

    Sinkkonen, A., Penttinen, O-P. & Strömmer, R., 2009, In : Science of the Total Environment. 407, 15, p. 4461-4464 4 p.

    Research output: Contribution to journalArticleScientificpeer-review

  18. Impact of soil contaminants on plant growth depends on stand density and mobility of the contaminant

    Sinkkonen, A. T., Hansi, M., Vesterinen, M., Kauppi, S. & Strömmer, R., 2008, ConSoil 2008 Proceedings - 10th International UFZ-Deltares. p. D335-D342

    Research output: Chapter in Book/Report/Conference proceedingConference contributionScientificpeer-review

  19. Low toxicant concentrations decrease the frequency of fast-growing seedlings at high densities of annual baby's breath (Gypsophila elegans)

    Sinkkonen, A., Strömmer, R. & Penttinen, O-P., 2008, In : Environmental Pollution. 153, 3, p. 523-525 3 p.

    Research output: Contribution to journalArticleScientificpeer-review

  20. Soil and decomposer responses to grazing exclusion are weak in mountain snow-beds

    Virtanen, R., Salminen, J. & Strömmer, R., 2008, In : Acta Oecologica. 33, p. 207-212 6 p.

    Research output: Contribution to journalArticleScientificpeer-review

  21. Can density-dependent changes in plant growth indicate success of in-situ remediation?

    Sinkkonen, A. T. & Strömmer, R., 2007, Proceedings from the Third International Conference on Environmental Science and Technology (II). Starrett, S. K., Hong, J., Wilcock, R. J., Li, Q., Carson, J. H. & Amold, S. (eds.). Houston, Texas, USA: American Science Press, p. 40-45

    Research output: Chapter in Book/Report/Conference proceedingConference contributionScientificpeer-review

  22. HOPS-työ ja sen yhteys opetussuunnitelmaan: Ympäristöekologian laitoksella toteutettu tutkinnonuudistustyö

    Juden-Tupakka, S., Laaksonen, S., Strömmer, R. & Penttinen, O-P., 2006, Yliopisto-opiskelijan hops : prosessien kehittämiskuvauksia . Kuopio: Kuopion yliopisto

    Research output: Chapter in Book/Report/Conference proceedingChapterProfessional

  23. Lead contamination of an old shooting range affecting the local ecosystem: a case study with a holistic approach

    Rantalainen, M-L., Torkkeli, M., Strömmer, R. & Setälä, H., 2006, In : Science of the Total Environment. 369, p. 99-108 10 p.

    Research output: Contribution to journalArticleScientificpeer-review

  24. Methane and nitrous oxide fluxes, and carbon dioxide production in boreal forest soil fertilized with wood ash and nitrogen

    Maljanen, M., Jokinen, H., Saari, A., Strömmer, R. & Martikainen, P. J., 2006, In : Soil Use and Management. 22, 2, p. 151-157 7 p.

    Research output: Contribution to journalArticleScientificpeer-review

  25. Changes in ectomycorrhizal colonization and root peroxidase activity in Pinus sylvestris nursery seedlings planted in forest humus

    Tarvainen, O., Markkola, A. M., Ahonen-Jonnarth, U., Jumpponen, A. & Strommer, R., 2004, In : Scandinavian Journal of Forest Research. 19, p. 400-408 9 p.

    Research output: Contribution to journalArticleScientificpeer-review

  26. Diversity of macrofungi and plants in Scots pine forests along an urban pollution gradient

    Tarvainen, O., Markkola, A. M. & Strommer, R., 2003, In : Basic and Applied Ecology. 4, p. 547-556 10 p.

    Research output: Contribution to journalArticleScientificpeer-review

  27. Non-parallel changes in soil microbial carbon and nitrogen dynamics due to reindeer grazing in northern boreal forests

    Stark, S., Tuomi, J., Strommer, R. & Helle, T., 2003, In : Ecography. 26, p. 51-59 9 p.

    Research output: Contribution to journalArticleScientificpeer-review

  28. Interaction modification among decomposers impairs ecosystem processes in lead-polluted soil

    Salminen, J., Korkama, T. & Strommer, R., 2002, In : Environmental Toxicology and Chemistry. 21, p. 2301-2309 9 p.

    Research output: Contribution to journalArticleScientificpeer-review

  29. Reindeer grazing and soil microbial processes in two suboceanic and two subcontinental tundra heaths

    Stark, S., Strommer, R. & Tuomi, J., 2002, In : Oikos. 97, p. 69-78 10 p.

    Research output: Contribution to journalArticleScientificpeer-review

  30. Shift in ectomycorrhizal community composition in Scots pine (Pinus sylvestris L.) seedling roots as a response to nickel deposition and removal of lichen cover

    Markkola, A. M., Ahonen-Jonnarth, U., Roitto, M., Strömmer, R. (ed.) & Hyvärinen, M., 2002, In : Environmental Pollution. 120, p. 797-803 7 p.

    Research output: Contribution to journalArticleScientificpeer-review

  31. Soil microbial activity and community structure along a primary succession transect on the land-uplift coast in western Finland

    Merila, P., Strommer, R. & Fritze, H., 2002, In : Soil Biology & Biochemistry. 34, p. 1647-1654 8 p.

    Research output: Contribution to journalArticleScientificpeer-review

  32. Soil nitrogen transformations along a primary succession transect on the land-uplift coast in western Finland

    Merila, P., Smolander, A. & Strommer, R., 2002, In : Soil Biology & Biochemistry. 34, p. 373-385 13 p.

    Research output: Contribution to journalArticleScientificpeer-review

  33. Urban polluted forest soils induce elevated root peroxidase activity in Scots pine (Pinus sylvestris L.) seedlings

    Markkola, A. M., Tarvainen, O., Ahonen-Jonnarth, U. & Strommer, R., 2002, In : Environmental Pollution. 116, p. 273-278 6 p.

    Research output: Contribution to journalArticleScientificpeer-review

  34. Does the lichen mat alleviate the effects of wet deposited nickel on soil microorganisms and Scots pine (Pinus sylvestris L.) seedlings?

    Roitto, M., Strommer, R., Ahonen-Jonnarth, U., Hyvarinen, M. & Markkola, A. M., 2001, In : Plant and Soil. 230, 2, p. 267-277 11 p.

    Research output: Contribution to journalArticleScientificpeer-review

  35. Microbial and plant community structure across a primary succession gradient

    Pennanen, T., Strommer, R., Markkola, A. & Fritze, H., 2001, In : Scandinavian Journal of Forest Research. 16, p. 37-43 7 p.

    Research output: Contribution to journalArticleScientificpeer-review

  36. Impact of wet deposited nickel on the cation content of a mat-forming lichen Cladina stellaris

    Hyvarinen, M., Roitto, M., Ohtonen, R. & Markkola, A., 2000, In : Environmental and Experimental Botany. 43, p. 211-218 8 p.

    Research output: Contribution to journalArticleScientificpeer-review

  37. Soil microbial activity and biomass in the primary succession of a dry heath forest

    Aikio, S., Vare, H. & Strommer, R., 2000, In : Soil Biology & Biochemistry. 32, p. 1091-1100 10 p.

    Research output: Contribution to journalArticleScientificpeer-review

  38. The effect of reindeer grazing on decomposition, mineralization and soil biota in a dry oligotrophic Scots pine forest

    Stark, S., Wardle, D. A., Ohtonen, R., Helle, T. & Yeates, G. W., 2000, In : Oikos. 90, p. 301-310 10 p.

    Research output: Contribution to journalArticleScientificpeer-review

  39. Characterization of 'safe sites' for pioneers in primary succession on recently deglaciated terrain

    Jumpponen, A., Vare, H., Mattson, K. G., Ohtonen, R. & Trappe, J. M., 1999, In : Journal of Ecology. 87, p. 98-105 8 p.

    Research output: Contribution to journalArticleScientificpeer-review

  40. Ecosystem properties and microbial community changes in primary succession on a glacier forefront

    Ohtonen, R., Fritze, H., Pennanen, T., Jumpponen, A. & Trappe, J., 1999, In : Oecologia. 119, p. 239-246 8 p.

    Research output: Contribution to journalArticleScientificpeer-review

  41. Effects of leguminous ground cover competition on red birch and soil nutrient status in the nursery

    Hanninen, K., Ohtonen, R. & Huttunen, S. M., 1999, In : Plant and Soil. 216, p. 129-138 10 p.

    Research output: Contribution to journalArticleScientificpeer-review

  42. Spatial distribution of soil ergosterol in the organic layer of a mature Scots pine (Pinus sylvestris L.) forest

    Mottonen, M., Jarvinen, E., Hokkanen, T. J., Kuuluvainen, T. & Ohtonen, R., 1999, In : Soil Biology & Biochemistry. 31, p. 503-516 14 p.

    Research output: Contribution to journalArticleScientificpeer-review

  43. Effects of established willows on primary succession on Lyman Glacier forefront, North Cascade Range, Washington, USA: Evidence for simultaneous canopy inhibition and soil facilitation

    Jumpponen, A., Mattson, K., Trappe, J. M. & Ohtonen, R., 1998, In : Arctic and Alpine Research. 30, 1, p. 31-39 9 p.

    Research output: Contribution to journalArticleScientificpeer-review

  44. Vegetation composition determines microbial activities in a boreal forest soil

    Ohtonen, R. & Vare, H., 1998, In : Microbial Ecology. 36, p. 328-335 8 p.

    Research output: Contribution to journalArticleScientificpeer-review

  45. Ecological theories in soil biology

    Ohtonen, R., Aikio, S. & Vare, H., 1997, In : Soil Biology & Biochemistry. 29, p. 1613-1619 7 p.

    Research output: Contribution to journalArticleScientificpeer-review

  46. Soil microbial activity in the coastal Norway spruce [Picea abies (L.) Karst.] forests of the Gulf of Bothnia in relation to humus-layer quality, moisture and soil types

    Merila, P. & Ohtonen, R., 1997, In : Biology and Fertility of Soils. 25, p. 361-365 5 p.

    Research output: Contribution to journalArticleScientificpeer-review

  47. Scots pine responses to CO2 enrichment .1. Ectomycorrhizal fungi and soil fauna

    Markkola, A. M., Ohtonen, A., AhonenJonnarth, U. & Ohtonen, R., 1996, In : Environmental Pollution. 94, p. 309-316 8 p.

    Research output: Contribution to journalArticleScientificpeer-review

  48. ESTIMATES OF FUNGAL BIOMASS IN SCOTS PINE STANDS ON AN URBAN POLLUTION GRADIENT

    MARKKOLA, A. M., OHTONEN, R., TARVAINEN, O. & AHONENJONNARTH, U., 1995, In : New Phytologist. 131, p. 139-147 9 p.

    Research output: Contribution to journalArticleScientificpeer-review

  49. ACCUMULATION OF ORGANIC-MATTER ALONG A POLLUTION GRADIENT - APPLICATION OF ODUMS THEORY OF ECOSYSTEM ENERGETICS

    OHTONEN, R., 1994, In : Microbial Ecology. 27, p. 43-55 13 p.

    Research output: Contribution to journalArticleScientificpeer-review

  50. CELLULASE ACTIVITY IN FOREST HUMUS ALONG AN INDUSTRIAL-POLLUTION GRADIENT IN OULU, NORTHERN FINLAND

    OHTONEN, R., LAHDESMAKI, P. & MARKKOLA, A. M., 1994, In : Soil Biology & Biochemistry. 26, p. 97-101 5 p.

    Research output: Contribution to journalArticleScientificpeer-review

  51. ENCHYTRAEID AND NEMATODE NUMBERS IN URBAN, POLLUTED SCOTS PINE (PINUS-SYLVESTRIS) STANDS IN RELATION TO OTHER SOIL BIOLOGICAL PARAMETERS

    OHTONEN, R., OHTONEN, A., LUOTONEN, H. & MARKKOLA, A. M., 1992, In : Biology and Fertility of Soils. 13, p. 50-54 5 p.

    Research output: Contribution to journalArticleScientificpeer-review

  52. Fungal mass in sporophores, mycorrhizas and living mycelia in Scots pine stands along a pollution gradient in the Oulu region of Finland

    Markkola, A. M., Ohtonen, R., Ahonen-Jonnarth, U., Tarvainen, O. & Ohtonen, A., 1992, Mycorrhizas in ecosystem. Read, D. J., Lewis, D. H., Fitter, A. H. & Alexander, I. J. (eds.). Wallingford: CAB International

    Research output: Chapter in Book/Report/Conference proceedingChapterScientific

  53. SOIL MICROBIAL COMMUNITY RESPONSE TO SILVICULTURAL INTERVENTION IN CONIFEROUS PLANTATION ECOSYSTEMS

    OHTONEN, R., MUNSON, A. & BRAND, D., 1992, In : Ecological Applications. 2, p. 363-375 13 p.

    Research output: Contribution to journalArticleScientificpeer-review

  54. BIOLOGICAL-ACTIVITY AND AMOUNT OF FDA MYCELIUM IN MOR HUMUS OF SCOTS PINE STANDS (PINUS-SYLVESTRIS L) IN RELATION TO SOIL PROPERTIES AND DEGREE OF POLLUTION

    OHTONEN, R. & MARKKOLA, A. M., 1991, In : Biogeochemistry. 13, p. 1-26 26 p.

    Research output: Contribution to journalArticleScientificpeer-review

  55. Biological activity and microorganisms in forest soil as indicators of environmental changes

    Ohtonen, R., 1990, Oulu: University of Oulu. 39 p.

    Research output: ThesisDoctoral ThesisCollection of Articles

  56. PEROXIDASE-ACTIVITY AS AN INDICATOR OF POLLUTION STRESS IN THE FINE ROOTS OF PINUS-SYLVESTRIS

    MARKKOLA, A. M., OHTONEN, R. & TARVAINEN, O., 1990, In : Water, Air and Soil Pollution. 52, p. 149-156 8 p.

    Research output: Contribution to journalArticleScientificpeer-review

  57. Soil biological parameters as indicators of changes in a Scots pine forests (Pinus sylvestris L.) caused by air pollution

    Ohtonen, R., Markkola, A. M., Heinonen-Tanski, H. & Fritze, H., 1990, Acidification in Finland. Kauppi, P., Kenttämies, K. & Anttila, P. (eds.). Berlin, Heidelberg: Springer-Verlag, p. 373-393

    Research output: Chapter in Book/Report/Conference proceedingChapterScientific

  58. Metsämaan mikrobiologia - aukko suomalaisessa metsäekologisessa tutkimuksessa

    Ohtonen, R., 1989, In : Luonnon Tutkija. p. 12-17

    Research output: Contribution to journalArticleScientificpeer-review

  59. Total sulphur content in the humus layer of urban polluted forests in the surroundings of Oulu

    Strömmer, R., Markkola, A. M. & Torvela, H., 1989, In : Water, Air and Soil Pollution. 44, p. 135-141

    Research output: Contribution to journalArticleScientificpeer-review

  60. The effect of forest fertilization on the nitrogen content of the fruit-bodies of the mycorrhizal fungi, Lactarius rufus and Suillus variegatus

    Ohtonen, R., 1986, In : Annales Botanici Fennici. p. 189-203

    Research output: Contribution to journalArticleScientificpeer-review

  61. Seasonal changes in the cytoplasmic structures of sporogenous cells of the Scotch pine

    Hohtola, A., Kupila-Ahvenniemi, S. & Ohtonen, R., 1984, In : Annales Botanici Fennici. p. 143-149

    Research output: Contribution to journalArticleScientificpeer-review

  62. Mineral concentrations in some edible fungi and their relation to fruit-body size and mineral status of substrate

    Ohtonen, R., 1982, In : Annales Botanici Fennici. p. 203-209

    Research output: Contribution to journalArticleScientificpeer-review

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Highlighted activities

  1. Supervision of doctoral thesis, Nan Hui

    Rauni Strömmer (Supervisor)
    2010

    Activity: Examination typesSupervisor or co-supervisor of doctoral thesis

  2. Recycling of Biomass Ashes

    Rauni Strömmer (Member of organizing committee)
    22 Mar 201023 Mar 2010

    Activity: Participating in or organising an event typesOrganisation and participation in conferences, workshops, courses, seminars

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Latest projects

  1. ADELE: Autoimmune Defense and Living Environment

    Sinkkonen, A., Puhakka, R., Grönroos, M., Romantschuk, M., Strömmer, R., Valve, R., Parajuli, A., Hyöty, H., Laitinen, O., Rajaniemi, J., Siter, N., Roslund, M., Vari, H., Oikarinen, S. & Nurminen, N.

    Unknown funder

    01/01/201531/12/2019

    Project: Research project

  2. NITRIFIKAATIO - PROSESSIT JA ORGANISMIT

    Strömmer, R.

    Unknown funder

    01/01/200931/12/2012

    Project: Research project

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ID: 76746