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 2017 In : Nutrient Cycling in Agroecosystems. 2017, p. 1-11 11 p.

    Publication: Contribution to journalA1 Refereed journal article

  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.

    Publication: Contribution to journalA1 Refereed journal article

  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.

    Publication: Contribution to journalA1 Refereed journal article

  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.

    Publication: Contribution to journalA1 Refereed journal article

  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

    Publication: Contribution to journalA1 Refereed journal article

  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.

    Publication: Contribution to journalA1 Refereed journal article

  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

    Publication: Contribution to journalA1 Refereed journal article

  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.

    Publication: Contribution to journalA1 Refereed journal article

  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.

    Publication: Contribution to journalA1 Refereed journal article

  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.

    Publication: Contribution to journalA1 Refereed journal article

  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.

    Publication: Contribution to journalA1 Refereed journal article

  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.

    Publication: Contribution to journalA1 Refereed journal article

  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.

    Publication: Contribution to journalA1 Refereed journal article

  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.

    Publication: Contribution to journalA1 Refereed journal article

  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.

    Publication: Contribution to journalA1 Refereed journal article

  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.

    Publication: Contribution to journalA1 Refereed journal article

  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.

    Publication: Contribution to journalA1 Refereed journal article

  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 p. D335-D342

    Publication: Conference contributionA4 Article in conference publication (refereed)

  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.

    Publication: Contribution to journalA1 Refereed journal article

  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.

    Publication: Contribution to journalA1 Refereed journal article

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

    Sinkkonen, A. T. & Strömmer, R. 2007 p. 40-45

    Publication: Conference contributionA4 Article in conference publication (refereed)

  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

    Publication: Contribution to book/anthologyD2 Article in professional hand or guide book or in a professional data system, or text book material

  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.

    Publication: Contribution to journalA1 Refereed journal article

  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.

    Publication: Contribution to journalA1 Refereed journal article

  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.

    Publication: Contribution to journalA1 Refereed journal article

  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.

    Publication: Contribution to journalA1 Refereed journal article

  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.

    Publication: Contribution to journalA1 Refereed journal article

  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.

    Publication: Contribution to journalA1 Refereed journal article

  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.

    Publication: Contribution to journalA1 Refereed journal article

  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.

    Publication: Contribution to journalA1 Refereed journal article

  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.

    Publication: Contribution to journalA1 Refereed journal article

  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.

    Publication: Contribution to journalA1 Refereed journal article

  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.

    Publication: Contribution to journalA1 Refereed journal article

  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.

    Publication: Contribution to journalA1 Refereed journal article

  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.

    Publication: Contribution to journalA1 Refereed journal article

  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.

    Publication: Contribution to journalA1 Refereed journal article

  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.

    Publication: Contribution to journalA1 Refereed journal article

  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.

    Publication: Contribution to journalA1 Refereed journal article

  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.

    Publication: Contribution to journalA1 Refereed journal article

  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.

    Publication: Contribution to journalA1 Refereed journal article

  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.

    Publication: Contribution to journalA1 Refereed journal article

  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.

    Publication: Contribution to journalA1 Refereed journal article

  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.

    Publication: Contribution to journalA1 Refereed journal article

  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.

    Publication: Contribution to journalA1 Refereed journal article

  45. Ecological theories in soil biology

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

    Publication: Contribution to journalA1 Refereed journal article

  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.

    Publication: Contribution to journalA1 Refereed journal article

  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.

    Publication: Contribution to journalA1 Refereed journal article

  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.

    Publication: Contribution to journalA1 Refereed journal article

  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.

    Publication: Contribution to journalA1 Refereed journal article

  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.

    Publication: Contribution to journalA1 Refereed journal article

  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.

    Publication: Contribution to journalA1 Refereed journal article

  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

    Publication: Contribution to book/anthologyB2 Contribution to book/other compilations (non-refereed)

  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.

    Publication: Contribution to journalA1 Refereed journal article

  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.

    Publication: Contribution to journalA1 Refereed journal article

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

    Ohtonen, . R. 1990 Oulu: University of Oulu. 39 p. (Acta Universitatis Ouluensis. Series A, Scientiae rerum naturalium)

    Publication: Book/anthologyG5 Doctoral Thesis, 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.

    Publication: Contribution to journalA1 Refereed journal article

  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

    Publication: Contribution to book/anthologyB2 Contribution to book/other compilations (non-refereed)

  58. Metsämaan mikrobiologia - aukko suomalaisessa metsäekologisessa tutkimuksessa

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

    Publication: Contribution to journalA1 Refereed journal article

  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

    Publication: Contribution to journalA1 Refereed journal article

  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

    Publication: Contribution to journalA1 Refereed journal article

  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

    Publication: Contribution to journalA1 Refereed journal article

  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

    Publication: Contribution to journalA1 Refereed journal article

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Highlighted activities

  1. Supervision of doctoral thesis, Nan Hui

    Strömmer, R. (Supervisor)
    2010

    Activity: ExaminationSupervisor or co-supervisor of doctoral thesis

  2. Recycling of Biomass Ashes

    Strömmer, R. (Member of organizing committee)
    22 Mar 201023 Mar 2010

    Activity: Participating in or organising an eventOrganisation 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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Education

Fil. toht., muu tai tuntematon luonnontieteellinen

ID: 76746