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Abstract. We compared the species composition and species density of vascular plants in the understorey vegetation of boreal forest between Picea mariana (Black spruce) and Populus tremuloides (Trembling aspen) stands in British Columbia, Canada, and related differences in species composition and species density between the two forest types to dominant canopy tree species as well as a wide variety of environmental factors. We analysed 231 stands, distributed in three different climatic regions representing drier, wetter, and milder variations of montane boreal climate. Of these stands 118 were dominated by P. mariana and 113 by P. tremuloides. P. tremuloides stands had higher species density than P. mariana stands...
The importance of large woody debris (LWD) in forested stream ecosystems is well documented. However, little is known about LWD in northern boreal forest streams. We investigated the abundance, characteristics, and function of LWD in 13 small tributary streams of the upper Yukon River basin, Yukon Territory, Canada. LWD abundance was similar to values reported from temperate regions, whereas LWD size and total volume were well below values for the Pacific Northwest. LWD formed 28% of the pools, which provide important habitat for juvenile chinook salmon (Oncorhynchus tshawytscha Walbaum). The median diameter of pool-forming pieces was 17 cm, and ring counts on fallen riparian trees indicated that pool-forming pieces...
Categories: Publication; Types: Citation; Tags: M1-Ecosystems


map background search result map search result map Forest floor moisture content and fire danger indices in Alaska EFFECTS OF HISTORICAL TIMBER HARVESTING PRACTICES ON CARIBOU FORAGE LICHEN ABUNDANCE NEAR MARSH LAKE, YUKON  -  PHASE 1 FINAL REPORT EFFECTS OF HISTORICAL TIMBER HARVESTING PRACTICES ON CARIBOU FORAGE LICHEN ABUNDANCE NEAR MARSH LAKE, YUKON  -  PHASE 1 FINAL REPORT Forest floor moisture content and fire danger indices in Alaska