The University of Southampton
University of Southampton Institutional Repository

Geographic and temporal variations in fire history in boreal ecosystems of Alaska

Record type: Article

Charcoal and pollen analyses were used to determine geographic and temporal patterns of fire importance in boreal forests of the Kenai Peninsula and interior Alaska. Sieved, large charcoal particles were measured in continuously sampled cores of Rock, Portage, and Arrow Lakes (Kenai Peninsula) and Dune and Deuce Lakes (interior Alaska) to estimate regional fire importance and fire occurrence. Charcoal accumulation rates have been low for the past 1000 years in both regions with slightly higher values in interior Alaska than on the Kenai Peninsula. An exception to this general pattern was the period of post-European settlement on the Kenai Peninsula, where charcoal accumulation rates increased by 10-fold. This increase most likely reflected increased fire occurrence due to human ignition. The Holocene charcoal and pollen records from Dune Lake indicate low fire occurrence during the early (9000 to 5500 calibrated year before present (yr BP)) birch-white spruce-alder (Betula-Picea glauca-Alnus) communities and high fire occurrence as black spruce (Picea mariana) became established after 5500 yr BP. Increased fires probably resulted from a change to fire-prone black spruce forests. For the past 5500 yr BP, two distinct fire regimes occurred. Frequent fires, with an average fire return interval of 98 years, characterized the period from 5500-2400 yr BP. Fewer fires, with an average fire interval of 198 years, characterized the period after 2400 yr BP. Fuel accumulation, stand structure, and vegetation species contributed to the natural variability in fire regimes during past changes in climate.

Full text not available from this repository.

Citation

Lynch, J.A., Clark, J.S., Bigelow, N.H., Edwards, M.E. and Finney, B.P. (2002) Geographic and temporal variations in fire history in boreal ecosystems of Alaska Journal of Geophysical Research, 108, (D1), pp. 8152-8169. (doi:10.1029/2001JD000332).

More information

Published date: 2002

Identifiers

Local EPrints ID: 14870
URI: http://eprints.soton.ac.uk/id/eprint/14870
ISSN: 0148-0227
PURE UUID: 02f2c594-dd3a-4e32-aec8-785d74ef6bdc

Catalogue record

Date deposited: 09 Mar 2005
Last modified: 17 Jul 2017 16:52

Export record

Altmetrics

Contributors

Author: J.A. Lynch
Author: J.S. Clark
Author: N.H. Bigelow
Author: M.E. Edwards
Author: B.P. Finney

University divisions


Download statistics

Downloads from ePrints over the past year. Other digital versions may also be available to download e.g. from the publisher's website.

View more statistics

Atom RSS 1.0 RSS 2.0

Contact ePrints Soton: eprints@soton.ac.uk

ePrints Soton supports OAI 2.0 with a base URL of http://eprints.soton.ac.uk/cgi/oai2

This repository has been built using EPrints software, developed at the University of Southampton, but available to everyone to use.

We use cookies to ensure that we give you the best experience on our website. If you continue without changing your settings, we will assume that you are happy to receive cookies on the University of Southampton website.

×