The immigration and spread of Norway spruce (Picea abies (L.) Karst.) in Norway

Hafsten, Ulf

doi:10.1080/00291959208552291

Cited by 46 publications

(50 citation statements)

References 0 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Notably, several of the characteristic lichen species in the Trøndelag region feature disjunctive distribution patterns, e.g., the amphi-atlantic distribution of Erioderma pedicellatum (Jørgensen 1972). , Hafsten 1992. In Namdalen, where the present study was carried out, alder and birch are locally abundant at riparian zones, willow and rowan rare, and aspen (Populus tremula) and Scots pine (Pinus sylvestris) absent from our study sites.…”

Section: Study Areamentioning

confidence: 75%

Epiphytic Lichens in Norwegian Coastal Spruce Forest: Historic Logging and Present Forest Structure

Gjerde¹,

Storaunet²,

Rolstad³

et al. 2001

Ecological Applications

View full text Add to dashboard Cite

Current forestry policies worldwide aim at conserving and restoring biodiversity in managed forests. In this respect, epiphytic lichens have become a focal group in studies of how logging and silvicultural methods can be adjusted to mimic and restore oldgrowth conditions. We addressed this issue in a retrospective study in the coastal spruce (Picea abies) forest region of central Norway, surveying 31 old forest sites in order to relate a selected group of epiphytic macrolichens (Fuscopannaria ahlneri, Lobaria pulmonaria, L. scrobiculata, Nephroma spp., Platismatia norvegica, Pseudocyphellaria crocata, Ramalina thrausta, and Sphaerophorus globosus) to forest stand characteristics and previous logging history. The lichens were associated with brook ravines, F. ahlneri and P. crocata mostly so, being 10 times more abundant in ravine valley bottoms than on adjacent slopes and plateaus. All species used spruce trees as their main substrate, but L. pulmonaria, L. scrobiculata, and Nephroma spp. preferred scattered deciduous trees. Ramalina thrausta and S. globosus occurred more frequently on older trees and increased in number with increasing stand age. In ravine valley bottoms lichens tended to increase in number with increasing tree density (due to increased amount of branches), whereas the opposite was the case on slopes and plateaus (due to higher proportion of high-branched trees). All locations had been selectively cut two or more times during the last 100 yr, with a total harvested volume of 31-124% of present-day standing volumes. After controlling for covariation with stand structure, variables describing logging history (harvested volume, number of cuts, minimum standing volume, and years since last cut) did not explain significant parts of the variation in present-day abundance of the selected lichens. The results suggest that moderate selective cuttings may prove an acceptable management option to sustain viable lichen assemblages on private land.

show abstract

Section: Study Areamentioning

confidence: 75%

Epiphytic Lichens in Norwegian Coastal Spruce Forest: Historic Logging and Present Forest Structure

Gjerde¹,

Storaunet²,

Rolstad³

et al. 2001

Ecological Applications

View full text Add to dashboard Cite

show abstract

“…An almost identical succession is documented by age structure analyses of a high-elevation, presently spruce-dominated, area of southern Swedish Lapland (Kullman, 1991c). Overall, the 19th and early 20th centuries appear to have been a period of increasing spruce importance and resultant landscape transformation in the most marginal boreal habitats over much of northern and upland Fennoscandia (Nedkvitne & Thomter, 1953;Teikmanis, 1954;Fries, 1956;Lundqvist, 1969;Linder, 1984;Steijlen & Zackrisson, 1987, Bradshaw, 1993Kullman & Engelmark, 1990Hafsten, 1992;Hofgaard, \99?>a). It may be hypothesized that reduced soil freezing after the culmination of the Little Ice Age (cf.…”

Section: Population Development and Disturbance Historymentioning

confidence: 97%

Rise and demise of cold‐climate Picea abies forest in Sweden

Kullman

1996

New Phytologist

View full text Add to dashboard Cite

SUMMARYThe study focuses on structural and compositional dynamics of high-elevation (boreal) mixed Picea-Betula forest in the Swedish Scandes. Data from seven years' monitoring of crown condition (defoHation), seed viability, soil and air temperatures, a tree-ring chronology and the age structure of Picea are presented. Real long-term dynamism of the tree cover was inferred from radiocarbon dates of buried subfossil wood. At all time-scales, the forest has responded sensitively to thermal variability. Picea seed viability, demography and radial growth correlated positively with summer temperature. The current Picea population largely results from warming during the first half of the 20th century. However, cooler climate in the past c. five decades has led to reduced population and radial growth as well as accelerating crown defohation. This decline is related primarily to winter soil temperatures. The mechanism of needle loss is deduced to be winter desiccation and resulting cavitation of the xylem. It is hypothesized that previous similar episodes have been balanced by periods of spruce expansion. The successional history leading up to the present stage includes fire disturbance and subsequent coohng during the Little Ice Age, which prolonged and consolidated the early post-fire Betula phase. Pinus was incapable of penetrating these unusually dense birch stands, whereas the shade-intolerant spruce could establish progressively as chmate warmed. This course of structural and compositional dynamism relates to complex interactions of disturbance, chmate change and reproductive responses.

show abstract

“…Picea abies, which invaded the coastal part of central Norway from the east, only a few hundred years ago (Hafsten 1992, Moen 1999, has only scattered occurrences on Kalvøya. In the coastal heathlands of Europe, native Picea abies trees occur only in south-western Sweden and coastal parts of central Norway, and the species may be an important heath coloniser in both areas (Damman 1957, Vorren 1979, Fremstad et al 1991).…”

Section: Coverage (%)mentioning

confidence: 99%

Woodland regeneration in a coastal heathland area in central Norway

Moen¹,

Nilsen²,

Aasmundsen³

et al. 2006

Norsk Geografisk Tidsskrift - Norwegian Journal of Geography

View full text Add to dashboard Cite

The open coastal heathlands in Norway have changed character in recent decades, mainly because traditional practices such as burning, cutting and grazing have been abandoned or reduced. In a project aimed at increasing our knowledge of woodland regeneration in oceanic boreal heathlands, an area on the island of Kalvøya in the archipelago of Vikna on the extreme outer coast of central Norway has been studied. Kalvøya has calcareous bedrock; rich heath, rich fens and low-herb woodland cover 20% of the island. Large parts are paludified, and wet heath and mire vegetation cover 60%. The island has not been inhabited, but it was used for summer farming in the latter part of the 19th century and later for stock grazing. The woodland and scrub were mapped using aerial photographs from 1961 and 1981 and by fieldwork in 2001. Vegetation changes were analyzed using GIS techniques. Woodland and scrub increased from 3. 0% in 1961, to 4.3% in 1981, to 11.6% in 2001. Betula pubescens is the commonest woody species. The oldest trees are 150 to 175 years old, growing in the most heavily wooded area, far away from the summer farm. In addition to human impact (summer farm, grazing pressure), the geology, terrain (degree of exposure), and climatic factors are important for woodland colonisation and distribution.

show abstract

The immigration and spread of Norway spruce (Picea abies (L.) Karst.) in Norway

Cited by 46 publications

References 0 publications

Epiphytic Lichens in Norwegian Coastal Spruce Forest: Historic Logging and Present Forest Structure

Epiphytic Lichens in Norwegian Coastal Spruce Forest: Historic Logging and Present Forest Structure

Rise and demise of cold‐climate Picea abies forest in Sweden

Woodland regeneration in a coastal heathland area in central Norway

Contact Info

Product

Resources

About