Skip to Main Content
Seed invasion filters and forest fire severityAuthor(s): Tom R. Cottrell; Paul F. Hessburg; Jonathan A. Betz
Source: Fire Ecology
Publication Series: Scientific Journal (JRNL)
PDF: View PDF (1.66 MB)
DescriptionForest seed dispersal is altered after fire. Using seed traps, we studied impacts of fire severity on timing of seed dispersal, total seed rain, and seed rain richness in patches of high and low severity fire and unburned Douglas-fir (Pseudotsuga menziesii) forests in the Fischer and Tyee fire complexes in the eastern Washington Cascades. Unburned plots had the lowest average seed production. The high severity fire patches in the Fischer Fire Complex had a higher total seed production than low severity fire patches of the same complex. At the Tyee Fire Complex, the total seed production for each of the two fire severities was similar, but the period of maximum seed dispersal was later for high severity than low severity fire. Seed rain at the Fischer Fire patches (sampled one year after the fire) was predominantly composed of annual species, while that of the Tyee Fire patches (sampled nine years after fire) was predominantly perennial species. Seed rain richness was greater in Tyee high severity patches than paired low severity fire patches. In these paired Tyee patches the average number of new seed species (species not found in the extant plot vegetation) was greater for high severity than low severity fire. Our results suggest that high severity fire plots are more porous to seed rain than low severity plots. Intact forest canopies may filter seed rain and reduce seed influx, while high severity fires are more open to invasion by seed dispersal.
- You may send email to email@example.com to request a hard copy of this publication.
- (Please specify exactly which publication you are requesting and your mailing address.)
- We recommend that you also print this page and attach it to the printout of the article, to retain the full citation information.
- This article was written and prepared by U.S. Government employees on official time, and is therefore in the public domain.
CitationCottrell, Tom R.; Hessburg, Paul F.; Betz, Jonathan A. 2008. Seed invasion filters and forest fire severity. Fire Ecology. 4(1): 87-100.
Keywordsfire, seed dispersal, seed rain, seed rain richness, Washington Cascades
- Postfire seed rain of black spruce, a semiserotinous conifer, in forests of interior Alaska
- Patterns of conifer tree regeneration following an autumn wildfire event in the western Oregon Cascade Range, USA.
- Vegetation response to burn severity, native grass seeding, and salvage logging
XML: View XML