Document


Title

Landscape modification of DOC concentration in boreal lakes: implications for UV-B sensitivity
Document Type: Journal Article
Author(s): R. France ; R. Steedman ; R. Lehmann ; R. Peters
Publication Year: 2000

Cataloging Information

Keyword(s):
  • boreal forests
  • Canada
  • carbon
  • clearcutting
  • deforestation
  • DOC concentration
  • droughts
  • fire frequency
  • fire management
  • forest management
  • isotopes
  • lakes
  • logging
  • microorganisms
  • Ontario
  • Quebec
  • radiation
  • stable carbon
  • watershed logging
  • watershed management
  • watersheds
  • wildfires
  • wildfires
  • zooplankton
Region(s):
Record Maintained By:
Record Last Modified: June 1, 2018
FRAMES Record Number: 52225
Tall Timbers Record Number: 29297
TTRS Location Status: Not in file
TTRS Call Number: Available
TTRS Abstract Status: Okay, Fair use, Reproduced by permission

This bibliographic record was either created or modified by the Tall Timbers Research Station and Land Conservancy and is provided without charge to promote research and education in Fire Ecology. The E.V. Komarek Fire Ecology Database is the intellectual property of the Tall Timbers Research Station and Land Conservancy.

Description

It has been recently suggested that droughts induced by climate warming reduce the catchment export of colour-forming, and therefore, UV-B protective, DOC to boreal lakes, which in turn may influence the health of resident biota. We determined that the concentration of DOC in 116 Canadian boreal lakes increased in relation to the severity of previous (4-13 yr) catchment forest clearance (reference - buffer strip - wildfire burnt - partial basin clearcut - whole basin clearcut), and was negatively related to water transparency. Removing the landscape influence of catchment drainage ratio showed that lakes within clearcut or burnt watersheds averaged 2 to 3 mg L-1 more DOC than those in reference, undisturbed catchments. Our results suggest the limited possibility that the increased incidence of wildfires coincident with climate warming may partially offset the effects of droughts on catchment export of DOC in the short-term, and thus serve to mitigate the effects of damaging UV-B exposure for selected basins in localized regions. © 2000 Kluwer Academic Publishers. Printed in the Netherlands.

Citation:
France, R., R. Steedman, R. Lehmann, and R. Peters. 2000. Landscape modification of DOC concentration in boreal lakes: implications for UV-B sensitivity. Water Air and Soil Pollution, v. 122, no. 1-2, p. 153-162.