Hökkä, Hannu

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

[  Suomeksi  |  Publications at Metla  |  Metla Homepage  ]

Expertise

• peatland forestry
• growth and yield
• hydrology

Research Projects

Current

• Forests and Water- transfer of knowledge and expertise
  
• Knowledge based data services -improving the life cycle and accessibility of environmental data provided for public interest
  
• Natural regeneration of forests
  
• Need for ditch network maintenance in drained peatlands and the effects on water courses and timber production at forest owner and regional scale
  
• Prediction of stand dynamics and development of MOTTI software
  
• Uneven-aged forest management
  

Former

• Classification of forest sites
  
• Coordination of the Research programme of the ecologically and economically sustainable forestry on peatlands
  
• Decision support system for stand management
  
• Ditch network maintenance -need and technology
  
• Effect of structural complexity on growth and yield of forest stands
  
• Effects of ditch network maintenance on the development of peatland stands
  
• Effects of tree stand and climate on the water balance of drained peatland forests
  
• Effects of tree stand and climate on the water balance of drained peatland forests
  
• Forest regeneration and afforestation on peatlands
  
• Growth and yield of peatland stands
  
• Growth, yield, and stand dynamics on drained peatlands
  
• Hydrological nutrient losses and methods of water quality protection on peatlands drained for forestry purposes
  
• Impacts of cuttings on stand and site nutrition, tree growth, and stand dynamics on drained peatlands
  
• Maintainance of sustainable nutrient status in peatland stands
  
• Multidimensional description of forest site
  
• Nutrient amounts and nutrient dynamics in drained peatland
  
• Nutrient status and effects of fertilisation in tree stands growing on drained mires
  
• Prediction and mitigation of nutrient and sediment load from forested catchments: Development of FEMMA-computation tool
  
• Prediction of stand development
  
• Regeneration of peatland forests
  
• Silvicultural regimes for drained peatland forests.
  
• Stand structure, copetition dynamics and site productivity in growth models
  
• The effects of stemwood and wholetree harvesting in drained peatlands on leaching of nutrients and heavy metals to water courses and nutrient sufficiency for sustainable treeproduction
  
• Timber production possibilities on Finnish peatlands
  
• Tree production and water protection after maintenance of ditch networks
  

Contacts

Keywords: classification, growth, hydrology, peatland forests, peatland sites, yield