Helmisaari, Heljä-Sisko

D.Sc. (Agr. & For.), Senior Researcher

[  Suomeksi  |  Publications at Metla  |  Publications, complementary list / full list  |  Curriculum vitae CV  |  Metla Homepage  ]

Expertise

• forest ecosystems
• forest soil
• carbon and nutrient dynamics
• environmental change

Research Projects

Current

• Age of tree root and understorey rhizome carbon across ecological gradients in boreal forests - radiocarbon isotope approach
  
• Bioenergy from logging residues - effects on soil and tree stand
  
• Carbon and nutrient dynamics in forest soil under environmental change
  
• Nutrient balances on forested mineral soils
  
• Tree species and forest soil properties
  

Former

• Artificial recharge of groundwater: infiltration techniques, soil processes and water quality
  
• Effects of soil moisture level and nitrogen availability on nutrient status and growth of Norway spruce stands (Picea abies Karst.).
  
• Fertility and management of forest soils
  
• Nutrient dynamics and biomass allocation in different tree species: effects of nitrogen deposition and drought
  
• Nutrient dynamics and management of forested mineral soils
  
• Pools and fluxes of carbon in Finnish forests and their economic and social implications - stage 1
  
• Pools and fluxes of carbon on mineral soils and peatlands
  
• Recovery of boreal forest ecosystem from long-term heavy-metal pollution
  
• Removal of nutrients with biomass in Norway spruce stans
  
• TER coordination
  
• The effect of air pollutants on the function of forest ecosystem
  
• Tree species and forest soil fertility
  
• Wood for energy -a contribution to the development of sustainable forest management
  

Contacts

Keywords: artificial groundwater, carbon dynamics, forest ecosystems, forest soils, forest trees, nutrient dynamics, roots