Document


Title

Prediction of forest-floor moisture content under diverse jack pine canopy conditions
Document Type: Journal Article
Author(s): Z. Chrosciewicz
Publication Year: 1989

Cataloging Information

Keyword(s):
  • Canada
  • DMC - CFFDRS Duff Moisture Code
  • FFMC - CFFDRS Fine Fuel Moisture Code
  • forest floor moisture content
  • FWI - CFFDRS Fire Weather Index System
  • jack pine
  • Pinus banksiana
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Record Maintained By:
Record Last Modified: November 12, 2015
FRAMES Record Number: 12150

Description

Moisture contents of organic forest-floor materials were studied by strata in a semi-mature jack pine (Pinus banksiana Lamb.) stand in relation to their within-stand locations and changes in both duff moisture code and fine fuel moisture code, the two weather-based components of the Canadian Forest Fire Weather Index System. The resulting best-fitting curvilinear regressions (Y=ae^bX) of the duff moisture code showed distinctive patterns of variation so that both the surface and subsurface forest-floor strata were consistently more moist in stand openings than under stand canopy. An initial moisture inversion between the surface and subsurface forest-floor materials manifested itself near the start of the regressions wherever live Schreber's moss (Pleurozium schreberi (Brit.) Mitt.) and litter were the combined surface materials; otherwise, pure surface litter was consistently drier than the subsurface materials. Combinations of all these materials down to mineral soil showed intermediate moisture contents both in stand openings and under stand canopy. In contrast, the best-fitting regressions of the fine fuel moisture code just for surface forest-floor strata were of the straight line (Y=a+bX) category and had generally lower r^2 values than those for the corresponding curvilinear regressions (Y=ae^bX) of the duff moisture code.

Online Link(s):
Citation:
Chrosciewicz, Z. 1989. Prediction of forest-floor moisture content under diverse jack pine canopy conditions. Canadian Journal of Forest Research 19(11):1483-1487.