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Lise Dalsgaard

Research Scientist

NIBIO Publications

Division of Forest and Forest Resources

Forest and Climate

(+47) 970 43 883
lise.dalsgaard@nibio.no

Place
Ås H8

Visiting address
Høgskoleveien 8, 1433 Ås

Links

My profile at ResearchGate

Biography

I contribute to the compilation, the reporting and the development of methodology for the Norwegian Green House Gas Inventory for the LULUCF sector (Land-use, Land-use change and Forestry) to the UNFCCC (Climate Convention and Kyoto Protocol). My tasks are primarily related to estimates of soil carbon changes in forest and in land-use transitions.
 
My current projects involve:
  • INVENT (Improving National forest inventory-based carbon stock change estimates for greenhouse gas inVENTories), financed by the Norwegian Research Council, and part of the FACCE ERA-GAS.
  • Long term C balance in drained afforested mires (Norwegian add-on-project to SNS-project “Anthropogenic greenhouse gas emissions from organic forest soils: improved inventories and implications for sustainable management”, financed by the Norwegian Environment Agency.

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Authors

Andreas Hagenbo Jogeir N. Stokland Terje Hoel Even Bergseng Lise Dalsgaard Christian Wilhelm Mohr Stephanie Eisner

Abstract

Grøfter i skog har blitt etablert for å bedre vekstforholdene på dårlig drenerte arealer. I dag er nygrøfting av myr og sumpskog for skogproduksjon forbudt, men vedlikehold av eksisterende grøfter – såkalt grøfterensk – er fortsatt aktuelt på produktiv skogsmark. Tiltaket er omdiskutert, særlig på grunn av mulige klimagassutslipp. Så hva betyr egentlig grøfterensk for klimaet?

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Authors

Carl-Fredrik Johannesson H. Ilvesniemi O. Janne Kjønaas K.S. Larsen A. Lehtonen Jenni Nordén D. Paré Hanna Marika Silvennoinen J. Stendahl I. Stupak L. Vesterdal Lise Dalsgaard

Abstract

Nordic and Canadian forests store substantial amounts of carbon (C) and are largely managed in a silvicultural system with clear-cut harvest. Previous meta-analyses of harvesting effects on soil C have shown short- to long-term declines after harvest, but effects of clear-cutting on boreal and northern temperate forest soil C stocks remain unresolved. We harmonized National Forest Soil Inventory (NFSI) data from Sweden, Denmark, Finland, Norway and Canada to examine soil C stocks up to 53 years following clear-cut harvest using a space-for-time approach. We analyzed forest floor and mineral soil C stocks in coniferous and deciduous/mixed forests. Coniferous forest floor C stocks decreased for ∼30 years after clear-cutting: when at its lowest stock level, Picea and Pinus forest floor C stocks had decreased by 23 % and 14 % relative to initial stock levels, respectively. Picea forest floor C stocks then remained close to its lowest levels until 53 years after clear-cutting, while for Pinus-dominated forests they increased again and recovered to the pre-harvest level 48 years after clear-cutting. No C stock changes were detected in the 0–10 cm or 10–20 cm mineral soil layers, while a small increase in 55–65 cm mineral soil was detected in Podzol soils. Data was too limited to detect statistical signals of clear-cutting for deciduous/mixed forests. Our results shows that clear-cut harvest has substantial and long-lasting effects on northern temperate and boreal forest soil C storage, and that combining data from several NFSIs can help elucidate forest management effects on soil C storage. Soil organic carbonForest harvestClear-cuttingBorealTemperateNational forest inventoryNational forest soil inventory

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Authors

Lars Sandved Dalen Lise Dalsgaard

Abstract

Ny forskning viser at flatehogst har betydelige og langvarige effekter på mengden karbon i humuslaget i boreal barskog – og effekten vedvarer i over 30 år. Jo mer karbon det er i utgangspunktet, desto større er endringene.

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