2026 Heljä-Sisko Helmisaari: Plant Science and Agronomy Researcher – H-Index, Publications & Awards

Discipline name	D-Index	World Ranking	Current World Ranking	National Ranking	Current National Ranking	Publications	Citations
Plant Science and Agronomy	57	1480	1358	10	8	143	9461

Research.com Recognitions

2026 - Research.com Plant Science and Agronomy in Finland Leader Award
2025 - Research.com Plant Science and Agronomy in Finland Leader Award
2023 - Research.com Plant Science and Agronomy in Finland Leader Award
2022 - Research.com Plant Science and Agronomy in Finland Leader Award

Overview

Heljä-Sisko Helmisaari is affiliated with the University of Helsinki in Finland and conducts research primarily in the fields of Environmental Science and Agricultural and Biological Sciences. Their work focuses on understanding processes related to soil carbon and nitrogen dynamics, forest ecology and biodiversity, as well as peatlands and wetlands ecology.

Helmisaari's research spans topics including:

Soil Carbon and Nitrogen Dynamics
Forest Ecology and Biodiversity Studies
Peatlands and Wetlands Ecology
Forest ecology and management
Plant responses to elevated CO2
Ecology and Vegetation Dynamics Studies
Fire effects on ecosystems

Their recent publications include:

"Surplus Carbon Drives Allocation and Plant-Soil Interactions," 2020, published in Trends in Ecology & Evolution
"Sustainable forest biomass: a review of current residue harvesting guidelines," 2021, published in Energy Sustainability and Society
"Fluxes of dissolved organic and inorganic nitrogen in relation to stand characteristics and latitude in Scots pine and Norway spruce stands in Finland," 2024, published in Helda (University of Helsinki)
"Partitioning of forest floor CO2 emissions reveals the belowground interactions between different plant groups in a Scots pine stand in southern Finland," 2020, published in Agricultural and Forest Meteorology
"Fluxes of dissolved organic carbon in stand throughfall and percolation water in 12 boreal coniferous stands on mineral soils in Finland," 2024, published in Helda (University of Helsinki)

Helmisaari frequently publishes in the following venues:

Forest Ecology and Management
Trends in Ecology & Evolution
Helda (University of Helsinki)
Ecosystems
Energy Sustainability and Society

Collaboration has been a notable aspect of their career, with frequent co-authors including:

Pekka Nöjd
Päivi Merilä
Liisa Ukonmaanaho
Liisa Kulmala
Antti-Jussi Lindroos

Best Publications

Redefining fine roots improves understanding of below-ground contributions to terrestrial biosphere processes

M. Luke McCormack;Ian A. Dickie;David M. Eissenstat;Timothy J. Fahey

1418
Citations
Below- and above-ground biomass, production and nitrogen use in Scots pine stands in eastern Finland

Heljä-Sisko Helmisaari;Kirsi Makkonen;Seppo Kellomäki;Esko Valtonen

406
Citations
Fine root biomass in relation to site and stand characteristics in Norway spruce and Scots pine stands

Heljä-Sisko Helmisaari;John Derome;Pekka Nöjd;Mikko Kukkola

342
Citations
Surplus Carbon Drives Allocation and Plant–Soil Interactions

Cindy E. Prescott;Sue J. Grayston;Heljä Sisko Helmisaari;Eva Kaštovská

330
Citations
Variation in fine root biomass of three European tree species: Beech (Fagus sylvatica L.), Norway spruce (Picea abies L. Karst.), and Scots pine (Pinus sylvestris L.)

L. Finér;H.-S. Helmisaari;K. Lõhmus;H. Majdi

285
Citations
Logging residue removal after thinning in Nordic boreal forests: Long-term impact on tree growth

Heljä-Sisko Helmisaari;Kjersti Holt Hanssen;Staffan Jacobson;Mikko Kukkola

262
Citations
Fine-root turnover rates of European forests revisited: an analysis of data from sequential coring and ingrowth cores

Ivano Brunner;Mark R Bakker;Mark R Bakker;Robert G Björk;Yasuhiro Hirano

257
Citations
Sustainable utilisation of forest biomass for energy - possibilities and problems: policy, legislation, certification, and recommendations and guidelines in the Nordic, Baltic, and other European countries.

I. Stupak;A. Asikainen;M. Jonsell;E. Karltun

228
Citations
Fine root foraging strategies in Norway spruce forests across a European climate gradient

Ivika Ostonen;Heljä-Sisko Helmisaari;Werner Borken;Leho Tedersoo;Leho Tedersoo

219
Citations
Fine root morphological adaptations in Scots pine, Norway spruce and silver birch along a latitudinal gradient in boreal forests

Ivika Ostonen;Krista Lõhmus;Heljä-Sisko Helmisaari;Jaak Truu

217
Citations
Nutrient retranslocation within the foliage of Pinus sylvestris

Heljä-Sisko Helmisaari

197
Citations
Seasonal and yearly variations of fine-root biomass and necromass in a Scots pine (Pinus sylvestris L.) stand

Kirsi Makkonen;Heljä-Sisko Helmisaari

189
Citations
Models of litterfall production for Scots pine (Pinus sylvestris L.) in Finland using stand, site and climate factors

Michael Starr;Anna Saarsalmi;Tatu Hokkanen;Päivi Merilä

170
Citations
Assessing fine-root biomass and production in a Scots pine stand: Comparison of soil core and root ingrowth core methods

Kirsi Makkonen;Heljä-Sisko Helmisaari

158
Citations
Element accumulation in boreal bryophytes, lichens and vascular plants exposed to heavy metal and sulfur deposition in Finland

Maija Salemaa;John Derome;Heljä-Sisko Helmisaari;Tiina Nieminen

157
Citations
Nutrient retranslocation in three Pinus sylvestris stands

Heljä-Sisko Helmisaari

154
Citations
Fine root biomass and production in Scots pine stands in relation to stand age.

Kirsi Makkonen;Heljä-Sisko Helmisaari

151
Citations
Adaptive root foraging strategies along a boreal-temperate forest gradient.

Ivika Ostonen;Marika Truu;Heljä‐Sisko Helmisaari;Martin Lukac;Martin Lukac

145
Citations
Nutrient cycling in Pinus sylvestris stands in eastern Finland

Heljä-Sisko Helmisaari

145
Citations
Temporal variation in nutrient concentrations of Pinus sylvestris needles

Heljä‐Sisko Helmisaari

144
Citations
Optimal co-allocation of carbon and nitrogen in a forest stand at steady state

Annikki Makela;Harry T. Valentine;Helja-Sisko Helmisaari

131
Citations
Sustainable forest biomass: a review of current residue harvesting guidelines

Brian D. Titus;Kevin Brown;Heljä Sisko Helmisaari;Elena Vanguelova

124
Citations