Downloaded 48 times
More Related Content
Boreal forest
- 1.
- 2. Boreal forest Biophysical environments Bioticinteractions Fire regimes & post-fire succession Floodplain succession & paludification Forest clearance and succession Climate change: natural & anthropogenic
- 3. Boreal forest biome ------- Scandinavia 70% Russia 70% Alaska 50%Canada Fairbanks Pr. Albert Kapuskasing Chicoutimi Note latitudinal variation
- 4.
- 5. Boreal forest Tundra Permafrostpatchydiscontinuous continuous Mean location Polar FrontJulyJan 150 240 Mean #d <0°C tree growth pollen/seed viability 120 30 Mean #d >10°C
- 6. The boreal forestbiome in Canada
- 7. Trees of theN. American boreal forest Evergreens Deciduous
- 8. non-accessed spruce pine balsam fir poplar birch other Boreal forestvegetation types (North America)
- 9. Forest structure Boreal forestTaiga spruce/birch/pine forest mosaic spruce-lichen woodland
- 10. Boreal forest soils southnorth Podzols, regosols gleysols, cryosols Underlain by coarse-textured deposits or bedrock. Well-drained, warm fairly rapidly in summer, more rapid breakdown of organics, strongly-leached, acidic, low nutrient availability. Underlain by fine-textured deposits / permafrost. Poorly- drained, cold in summer; little microbial activity, slow breakdown of organics, low nutrient availability. boreal forest taiga 0 100 O Ae Bf O BC Cg
- 11. Forest community segregation inthe boreal forest site: wet mesic dry soil: gleys podzols active: thin (<0.3m) thick (>2m) layer (or no permafrost) organic thick thin layer black spruce tamarack white spruce - birch-aspen- balsam fir jack pine mosses
- 12.
- 13. Floodplain succession ( pioneerphase) Balsam poplar white spruce herbs
- 14. Floodplain succession (climax phase) maturewhite spruce on scroll bars