Jack pine regeneration and crown fires
The effect of crown fires on Pinus banksiana Lamb. regeneration was studied in separate forest- and cone-burning experiments. Nine plots (0.562.25 ha) of jack pine trees near Fort Providence, Northwest Territories, were burned using crown fires to determine the effects of fire intensity, rate of fi...
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crcansciencepubl:10.1139/x04-073 2024-09-15T18:06:57+00:00 Jack pine regeneration and crown fires de Groot, W J Bothwell, P M Taylor, S W Wotton, B M Stocks, B J Alexander, M E 2004 http://dx.doi.org/10.1139/x04-073 http://www.nrcresearchpress.com/doi/pdf/10.1139/x04-073 en eng Canadian Science Publishing http://www.nrcresearchpress.com/page/about/CorporateTextAndDataMining Canadian Journal of Forest Research volume 34, issue 8, page 1634-1641 ISSN 0045-5067 1208-6037 journal-article 2004 crcansciencepubl https://doi.org/10.1139/x04-073 2024-07-25T04:10:07Z The effect of crown fires on Pinus banksiana Lamb. regeneration was studied in separate forest- and cone-burning experiments. Nine plots (0.562.25 ha) of jack pine trees near Fort Providence, Northwest Territories, were burned using crown fires to determine the effects of fire intensity, rate of fire spread, depth of burn, and postfire duff depth on seed viability and regeneration. Fire intensities were 36 902 93 476 kW/m, and fire spread rates were 2470 m/min. Depths of burn were low (2.03.6 cm), and postfire duff depths averaged 2.05.5 cm. Postfire seed rain was highly variable (64634 seeds/m 2 ), but seed viability was near 67% on all plots. Jack pine regeneration was also highly variable (779 seedlings/m 2 ). In the cone-burning experiment, the germination rate increased from 41% (unheated cones) to 64% after 10 s of burning but decreased sharply after 30 s. Flame temperature did not significantly affect viability. Cone-burning results suggest that the postfire seed rain originated from the upper canopy, where flame duration was 515 s, and seed in the lower canopy was consumed by fire. Seed rain and regeneration were primarily influenced by understory fine fuel consumption (and therefore, fire intensity), tree height, and live crown base height. Article in Journal/Newspaper Fort Providence Northwest Territories Canadian Science Publishing Canadian Journal of Forest Research 34 8 1634 1641 |
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Canadian Science Publishing |
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English |
description |
The effect of crown fires on Pinus banksiana Lamb. regeneration was studied in separate forest- and cone-burning experiments. Nine plots (0.562.25 ha) of jack pine trees near Fort Providence, Northwest Territories, were burned using crown fires to determine the effects of fire intensity, rate of fire spread, depth of burn, and postfire duff depth on seed viability and regeneration. Fire intensities were 36 902 93 476 kW/m, and fire spread rates were 2470 m/min. Depths of burn were low (2.03.6 cm), and postfire duff depths averaged 2.05.5 cm. Postfire seed rain was highly variable (64634 seeds/m 2 ), but seed viability was near 67% on all plots. Jack pine regeneration was also highly variable (779 seedlings/m 2 ). In the cone-burning experiment, the germination rate increased from 41% (unheated cones) to 64% after 10 s of burning but decreased sharply after 30 s. Flame temperature did not significantly affect viability. Cone-burning results suggest that the postfire seed rain originated from the upper canopy, where flame duration was 515 s, and seed in the lower canopy was consumed by fire. Seed rain and regeneration were primarily influenced by understory fine fuel consumption (and therefore, fire intensity), tree height, and live crown base height. |
format |
Article in Journal/Newspaper |
author |
de Groot, W J Bothwell, P M Taylor, S W Wotton, B M Stocks, B J Alexander, M E |
spellingShingle |
de Groot, W J Bothwell, P M Taylor, S W Wotton, B M Stocks, B J Alexander, M E Jack pine regeneration and crown fires |
author_facet |
de Groot, W J Bothwell, P M Taylor, S W Wotton, B M Stocks, B J Alexander, M E |
author_sort |
de Groot, W J |
title |
Jack pine regeneration and crown fires |
title_short |
Jack pine regeneration and crown fires |
title_full |
Jack pine regeneration and crown fires |
title_fullStr |
Jack pine regeneration and crown fires |
title_full_unstemmed |
Jack pine regeneration and crown fires |
title_sort |
jack pine regeneration and crown fires |
publisher |
Canadian Science Publishing |
publishDate |
2004 |
url |
http://dx.doi.org/10.1139/x04-073 http://www.nrcresearchpress.com/doi/pdf/10.1139/x04-073 |
genre |
Fort Providence Northwest Territories |
genre_facet |
Fort Providence Northwest Territories |
op_source |
Canadian Journal of Forest Research volume 34, issue 8, page 1634-1641 ISSN 0045-5067 1208-6037 |
op_rights |
http://www.nrcresearchpress.com/page/about/CorporateTextAndDataMining |
op_doi |
https://doi.org/10.1139/x04-073 |
container_title |
Canadian Journal of Forest Research |
container_volume |
34 |
container_issue |
8 |
container_start_page |
1634 |
op_container_end_page |
1641 |
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1810444296752463872 |