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Northward invading non-native vascular plant species in and adjacent to Wood Buffalo National Park, Canada

1992; Ottawa Field-Naturalists' Club; Volume: 106; Issue: 2 Linguagem: Inglês

10.5962/p.356933

0008-3550

Ross W. Wein, Gerold Wein, Sieglinde Bahret, William J. Cody,

Archaeology and Natural History

A survey of the non-native vascular plant species in Wood Buffalo National Park, Canada's largest forested National Park, documented their presence and abundance in key locations.Most of the fifty-four species (nine new records) were found in disturbed sites including roadsides, settlements, farms, areas of altered hydrological regimes, recent burns, and intensive bison grazing.Species that have increased most in geographic area and abundance in recent years include Agropyron repens, Bromus inermis, Chenopodium album, Melilotus spp., Trifolium spp., Plantago major, Achillea millefolium, Crepis tectorum and Sonchus arvensis.An additional 20 species, now common in the Peace River and Fort Vermilion areas, have the potential to invade the Park if plant communities are subjected to additional stress as northern climates are modified by the greenhouse effect and as other human-caused activities disturb the vegetation.It is recommended that permanent plots be located in key locations and monitored for species invasion and changing abundances as input to management plans.