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Interglacial deposits at Birch Creek, northeast Interior Alaska
Alaska ; Birch Creek ; Diagramme pollinique ; Géographie des régions polaires ; Interglaciaire ; Palynologie ; Paléo-environnement ; Pléistocène ; Quaternaire ; Stratigraphie ; Téphrochronologie

On growth problems of mountain birch near its distributional limits in Climatological extremes in the mountains, Physical background, geomorphological and ecological consequences.
Growth problems observed in mountain birch under marginal circumstances in northern Sweden and southern Groenland. Extreme summer temperatures and strong winter winds as stress factors are discussed.

The Holocene history of a subalpine birch forest enclave: subfossil evidence from central Sweden
Birch ; C 14 dating ; Climatic variation ; Forest ; Holocene ; Mountain ; Quaternary ; Snow ; Sweden ; Temperature

Spatial patterns and structure of the mountain birch tree-limit in the southern Swedish Scandes - a regional perspective
This study improves the understanding of the tree-limit phenomenon in general by identifying and analysing regional spatial patterns of the present-day tree-limit position (m a.s.l.) and structure of mountain birch along relevant topographical

Report on the distribution of dwarf birches and present pollen rain, Baffin Island, N.W.T., Canada
A distribution map for the dwarf birches is presented for the region from Frobisher Bay northward to Cumberland Peninsula. These shrubs are restricted to favourable habitats which, at the northern limit of the species (6740N) are found on south
-facing slopes above the immediate local cooling influence of the sea. Pollen studies within the zone of scattered dwarf birch indicate that pollen dispersal from these low, prostrate shrubs is minimal. Samples of moss collected beneath the bushes have 5

Does sewage sludge amendment to soil enhance the development of Silver birch and Scots pine ?
with industrial sewage sludge and afforested with birch and pine seedlings. To evaluate the growth of tree seedlings, tree dry biomass, height, diameter, root/shoot ratio, specific root length, shoot and root length were calculated. Higher concentrations of heavy

Lake-level reconstructions and paleohydrology of Birch Lake, Central Alaska, based on seismic reflection profiles and core transects
Lake-level history during the late Pleistocene and Holocene for Birch Lake, Alaska, was reconstructed using seismic profiles and multiproxy sedimentary analyses including sedimentology, geochemistry, magnetic susceptibility, and palynology

Larvae of the geometrid Epirrita autumnata (Bkh.) periodically attack the mountain birch. Birch forests of the Finmarks vidda highland plain in northern Norway, however are seldom defoliated. The hypothesis that the birch forest of the Finmark

Birch ; Climatic variation ; Forest ; Holocene ; Human impact ; Human occupation ; Iceland ; Model ; Palaeo-environment ; Palynology ; Simulation ; Vegetation ; Vegetation degradation
The AA. have simulated the spatial relationship between temperature change and long-term potential vegetation cover dynamics. The results show that the potential vegetation and birch forest range is highly sensitive to the temperature conditions

Biogeography ; Birch ; Chorology ; Holocene ; Palynology ; Phytogeography ; Quaternary ; Turkey

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