20022021

Research output per year

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Personal profile

Description of research and teaching

My research area is biogeochemistry, especially carbon and nutrient dynamics in forest ecosystems in relation to environmental changes and forest management. Many of my projects have been large ecosystem-level studies. The projects have dealt with nutrient dynamics and management on forested mineral soils, pools and fluxes of carbon on mineral soils and peatlands, artificial groundwater recharge on forested eskers and remediation of heavy-metal polluted sites.

My present research projects concentrate on fine root dynamics, in particular the role of roots in carbon cycling, the long-term soil changes and ecosystem recovery from chemical and physical load as well as the sustainability of forest bioenergy.

Teaching: https://blogs.helsinki.fi/forestsoil/teaching/

Education/Academic qualification

Forest sciences, Dr. (MMT), University of Eastern Finland (UEF)

Fields of Science

  • 4112 Forestry
  • Forest soil science
  • Forest ecosystem biogeochemistry
  • Root ecology

International and National Collaboration Publications and projects within past five years.

Publications

Fine root classification matters: nutrient levels in different functional categories, orders and diameters of roots in boreal Pinus sylvestris across a latitudinal gradient.

Mucha, J., Zadworny, M., Helmisaari, H-S., Nihlgard, B., Repo, T., Zytkowiak, M., Malek, S., Reich, P. B. & Oleksyn, J., Feb 2020, In : Plant and Soil. 447, p. 507–520

Research output: Contribution to journalArticleScientificpeer-review

Temperature and moisture dependence of daily growth of Scots pine (Pinus sylvestris L.) roots in southern Finland

Ding, Y., Schiestl-Aalto, P., Helmisaari, H-S., Makita, N., Ryhti, K. & Kulmala, L., Feb 2020, In : Tree Physiology. 40, 2, p. 272-283 12 p.

Research output: Contribution to journalArticleScientificpeer-review

Open Access
File

Fine root longevity and below- and aboveground litter production in a boreal Betula pendula forest

Ding, Y., Leppälammi-Kujansuu, J. & Helmisaari, H-S., 1 Jan 2019, In : Forest Ecology and Management. 431, p. 17-25 9 p.

Research output: Contribution to journalArticleScientificpeer-review

Hiili ja ravinteet järvestä metsämaahan-tekopohjaveden muodostamisen biogeokemialliset hyödyt ja haitat

Helmisaari, H-S. M., Kaarakka, L. M., Korpela, L., Lindroos, A-J., Nieminen, T. M., Nöjd, P. & Smolander, A., 9 Jan 2019, Pro Terra: Ihmiskunta tarvitsee maaperätieteitä, X Maaperätieteiden Päivien abstraktit. Manninen, N., Pennanen, T., Rankinen, K., Salo, T., Heinonsalo, J. & Soinne, H. (eds.). 2019 ed. Helsinki: Suomen Maaperätieteiden seura, Helsingin yliopisto, Maataloustieteiden Osasto, Vol. 75. p. 35-36 2 p. (Pro Terra; no. 75).

Research output: Chapter in Book/Report/Conference proceedingConference contributionScientific

Open Access
File

Leaching of heavy metals and barium from forest roads reinforced with fly ash

Lindroos, A-J., Ryhti, K., Kaakkurivaara, T., Uusitalo, J. & Helmisaari, H-S., 25 Apr 2019, In : Silva Fennica. 53, 2, 14 p., 10088.

Research output: Contribution to journalArticleScientificpeer-review

Open Access
File

Projects

Advancing the dialogue on pathways towards development of sustainable forest landscapes for production of wood for energy and the bioeconomy-collaboration, data, research, monitoring and governance

Stupak, I., Smith, C. T., Clarke, N., Lazdina , D., Morris, D. M., Helmisaari, H., Varnagiryte-Kabasinskiene, I., Nichiforel, L., Varik , M. & Dwivedi, P.

13/01/202031/12/2021

Project: Other project

Activities

New Phytologist (Journal)

Heljä-Sisko Helmisaari (Reviewer)
21 May 2020

Activity: Publication peer-review and editorial work typesPeer review of manuscripts

Metsäneuvosto (Forest Council) (External organisation)

Heljä-Sisko Helmisaari (Board member)
22 Aug 201930 Jun 2023

Activity: Membership typesMembership or other role in national/international committee, council, board

Doctoral thesis examination committee member, Sweden

Heljä-Sisko Helmisaari (Other role (describe in more detail in "Relation description, notes" field))
6 Dec 2019

Activity: Examination typesOpponent of doctoral dissertation

Jihwi Jang

Heljä-Sisko Helmisaari (Host)
10 Mar 20191 Jun 2019

Activity: Hosting a visitor typesAcademic visit at UH

Opponent of a doctoral dissertation, Norway

Heljä-Sisko Helmisaari (Opponent)
19 Dec 2019

Activity: Examination typesOpponent of doctoral dissertation

Press / Media

Haastattelu Metsälehden tiedeliitteeseen

Heljä-Sisko Helmisaari

15/08/2019

1 Media contribution

Press/Media: Press / Media

Interview for Lännen Media

Heljä-Sisko Helmisaari

08/12/2018

1 Media contribution

Press/Media: Press / Media

Asiantuntijana Aamu-TV:ssä

Heljä-Sisko Helmisaari

30/09/2016

1 Media contribution

Press/Media: Press / Media

MOT 9.1.2012: Tekovesikauhu

Heljä-Sisko Helmisaari

09/01/2012

1 Media contribution

Press/Media: Press / Media

Vesistö huomioitava metsälannoituksissa

Heljä-Sisko Helmisaari

09/08/2011

1 Media contribution

Press/Media: Press / Media