Invasive Species Compendium

Detailed coverage of invasive species threatening livelihoods and the environment worldwide

Abstract

The impact of broadcast burning and fire severity on species composition and abundance of surface vegetation in a jack pine (Pinus banksiana) clear-cut.

Abstract

Species composition and abundance of surface vegetation was examined within 4-yr-old jack pine (Pinus banksiana) clear felled areas at Frontier Lake in eastern Ontario, treated or not treated with prescribed burning (for vegetation management before replanting). Six unique species including Diervilla Lonicera, Convolvulus spithameus, Erigeron canadensis [Conyza canadensis], Salix spp., Viola adunca and Rubus allegheniensis were found solely within burned sites whereas only one species, Linnaea borealis, was exclusive to unburned areas. Fire severity levels were associated with the occurrence of buried seed species such as Salix spp. and Viola adunca, while most vegetative species occurred independent of severity. The abundance of deeply buried vegetatively reproducing species, including Prunus pumila, Vaccinium angustifolium, Pteridium aquilinum, Vaccinium myrtilloides, Kalmia angustifolia and the seed species Panicum xanthophysum and Carex houghtonii varied significantly with fire severity.