Heljä-Sisko Helmisaari
Heljä-Sisko Helmisaari
Professor in Forest soil science
Vahvistettu sähköpostiosoite verkkotunnuksessa helsinki.fi
Redefining fine roots improves understanding of below‐ground contributions to terrestrial biosphere processes
ML McCormack, IA Dickie, DM Eissenstat, TJ Fahey, CW Fernandez, ...
New Phytologist 207 (3), 505-518, 2015
Below-and above-ground biomass, production and nitrogen use in Scots pine stands in eastern Finland
HS Helmisaari, K Makkonen, S Kellomäki, E Valtonen, E Mälkönen
Forest ecology and management 165 (1-3), 317-326, 2002
Sustainable utilisation of forest biomass for energy—possibilities and problems: policy, legislation, certification, and recommendations and guidelines in the Nordic, Baltic …
I Stupak, A Asikainen, M Jonsell, E Karltun, A Lunnan, D Mizaraitė, ...
Biomass and Bioenergy 31 (10), 666-684, 2007
Fine root biomass in relation to site and stand characteristics in Norway spruce and Scots pine stands
HS Helmisaari, J Derome, P Nöjd, M Kukkola
Tree physiology 27 (10), 1493-1504, 2007
Logging residue removal after thinning in Nordic boreal forests: long-term impact on tree growth
HS Helmisaari, KH Hanssen, S Jacobson, M Kukkola, J Luiro, ...
Forest Ecology and Management 261 (11), 1919-1927, 2011
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, HS Helmisaari, K Lõhmus, H Majdi, I Brunner, I Børja, T Eldhuset, ...
Plant Biosystems 141 (3), 394-405, 2007
Nutrient retranslocation within the foliage of Pinus sylvestris
HS Helmisaari
Tree physiology 10 (1), 45-58, 1992
Seasonal and yearly variations of fine-root biomass and necromass in a Scots pine (Pinus sylvestris L.) stand
K Makkonen, HS Helmisaari
Forest ecology and management 102 (2-3), 283-290, 1998
Fine-root turnover rates of European forests revisited: an analysis of data from sequential coring and ingrowth cores
I Brunner, MR Bakker, RG Björk, Y Hirano, M Lukac, X Aranda, I Børja, ...
Plant and Soil 362 (1), 357-372, 2013
Fine root morphological adaptations in Scots pine, Norway spruce and silver birch along a latitudinal gradient in boreal forests
I Ostonen, K Lõhmus, HS Helmisaari, J Truu, S Meel
Tree Physiology 27 (11), 1627-1634, 2007
Nutrient cycling in Pinus sylvestris stands in eastern Finland
HS Helmisaari
Plant and Soil 168 (1), 327-336, 1995
Fine root biomass and production in Scots pine stands in relation to stand age
K Makkonen, HS Helmisaari
Tree physiology 21 (2-3), 193-198, 2001
Assessing fine-root biomass and production in a Scots pine stand–comparison of soil core and root ingrowth core methods
K Makkonen, HS Helmisaari
Plant and soil 210 (1), 43-50, 1999
Nutrient retranslocation in three Pinus sylvestris stands
HS Helmisaari
Forest Ecology and Management 51 (4), 347-367, 1992
Temporal variation in nutrient concentrations of Pinus sylvestris needles
HS Helmisaari
Scandinavian Journal of Forest Research 5 (1-4), 177-193, 1990
Fine root foraging strategies in N orway spruce forests across a E uropean climate gradient
I Ostonen, HS Helmisaari, W Borken, L Tedersoo, M Kukumägi, M Bahram, ...
Global Change Biology 17 (12), 3620-3632, 2011
Element accumulation in boreal bryophytes, lichens and vascular plants exposed to heavy metal and sulfur deposition in Finland
M Salemaa, J Derome, HS Helmisaari, T Nieminen, I Vanha-Majamaa
Science of the Total Environment 324 (1-3), 141-160, 2004
Models of litterfall production for Scots pine (Pinus sylvestris L.) in Finland using stand, site and climate factors
M Starr, A Saarsalmi, T Hokkanen, P Merilä, HS Helmisaari
Forest Ecology and Management 205 (1-3), 215-225, 2005
Fine-root biomass and necromass in limed and fertilized Norway spruce (Picea abies (L.) Karst.) stands
HS Helmisaari, L Hallbäcken
Forest Ecology and Management 119 (1-3), 99-110, 1999
Acidity and nutrient content of throughfall and soil leachate in three Pinus sylvestris stands
HS Helmisaari, E Mälkönen
Scandinavian Journal of Forest Research 4 (1-4), 13-28, 1989
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Artikkelit 1–20