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Post-fire and post-salvage regeneration dynamics of Picea mariana (black spruce) and Pinus banksiana (jack pine)

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Post-fire and post-salvage regeneration dynamics of Picea mariana (black spruce) and Pinus banksiana (jack pine)

Splawinski, Tadeusz B (2010) Post-fire and post-salvage regeneration dynamics of Picea mariana (black spruce) and Pinus banksiana (jack pine). Masters thesis, Concordia University.

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Abstract

The chapters in this thesis examine the post-fire and post-salvage natural regeneration dynamics of Picea mariana (black spruce) and Pinus banksiana (jack pine). The first examines the compaction of the post-fire organic layer by snow and its effects on seedling recruitment. We found that compression occured but at an insufficient rate to seriously increase seedling establishment. There was a positive relationship between the initial thickness of the burned organic layer depth and the subsequent amount of compression. The second chapter examines the post-fire abscission schedule of these two species. We found that seed abscission begins immediately following fire, with jack pine having a faster rate of abscission than black spruce. The third chapter presents a post-fire and post-salvage natural regeneration model that includes (1) the abscission schedule from Chapter two, (2) seed availability as a function of basal area, salvage proportion and timing; (3) seedling survivorship as a function of seed mass, seedbed type frequencies, first summer ash, and granivory; (4) seedling and seed mortality as a function of salvage operations; and (5) re-dispersal of salvaged seeds via a chipper. Simulations indicate that a delay in salvage timing and/or a reduction in salvage proportion can yield adequate natural regeneration densities, thereby foregoing the costly need to plant

Divisions:Concordia University > Faculty of Arts and Science > Geography, Planning and Environment
Item Type:Thesis (Masters)
Authors:Splawinski, Tadeusz B
Pagination:viii, 65 leaves : ill. ; 29 cm.
Institution:Concordia University
Degree Name:M. Sc.
Program:Geography
Date:2010
Thesis Supervisor(s):Greene, D
ID Code:979291
Deposited By: Concordia University Library
Deposited On:09 Dec 2014 17:56
Last Modified:18 Jan 2018 17:48
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