Plant Diversity and Cover after Wildfire on Anthropogenically Disturbed and Undisturbed Sites in Subarctic Upland Picea mariana Forest
Postfire development of cover and diversity was studied in an upland Picea mariana-dominated forest in the Canadian Subarctic. Short-term vegetation responses of 10- and 22-year-old cleared rights-of-way and a forest site were investigated two and three growing seasons after a wildfire. Prefire and...
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The Arctic Institute of North America
2002
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ftunivcalgaryojs:oai:journalhosting.ucalgary.ca:article/63767 2023-05-15T14:19:07+02:00 Plant Diversity and Cover after Wildfire on Anthropogenically Disturbed and Undisturbed Sites in Subarctic Upland Picea mariana Forest Nowak, Stephanie Kershaw, G. Peter Kershaw, Linda J. 2002-01-01 application/pdf https://journalhosting.ucalgary.ca/index.php/arctic/article/view/63767 eng eng The Arctic Institute of North America https://journalhosting.ucalgary.ca/index.php/arctic/article/view/63767/47702 https://journalhosting.ucalgary.ca/index.php/arctic/article/view/63767 ARCTIC; Vol. 55 No. 3 (2002): September: 215–317; 269-280 1923-1245 0004-0843 Subarctic vegetation wildfire industrial corridor postfire boreal succession végétation subarctique incendie de forêt corridor industriel post-incendie boréal info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion research-article 2002 ftunivcalgaryojs 2022-03-22T21:21:03Z Postfire development of cover and diversity was studied in an upland Picea mariana-dominated forest in the Canadian Subarctic. Short-term vegetation responses of 10- and 22-year-old cleared rights-of-way and a forest site were investigated two and three growing seasons after a wildfire. Prefire and postfire investigation of the study site allowed direct comparison of species cover and frequency values, as well as the Shannon-Wiener diversity index, before and after the fire. The fire considerably reduced diversity on all sites. Species diversity increased with the level of prefire disturbance. Prefire disturbance influenced the fire's characteristics by altering the fuel load and soil moisture, which in turn affected the postfire revegetation through different soil and microclimatic conditions. The sites that were most severely disturbed before the fire experienced the most rapid revegetation, including the highest diversity index and highest plant cover. Of the sites that were undisturbed before the fire, the natural drainage swales offered the best growing conditions after the burn. Furthermore, prefire disturbance increased the patchiness of the burned area, and the residual flora of unburned patches added to postfire floristic diversity. On a étudié le développement du couvert et de la diversité après un incendie dans une forêt de haute terre dominée par Picea mariana, au Canada subarctique. Les réactions à court terme des plantes poussant dans les emprises dégagées vieilles de 10 et 22 ans, ainsi qu'un site forestier ont été l'objet de recherches deux et trois saisons de croissance après un incendie de forêt. Les travaux réalisés sur le site de l'étude avant et après le feu ont permis une comparaison directe du couvert et de la fréquence des espèces ainsi que de l'index de diversité Shannon-Wiener avant et après le feu. L'incendie a considérablement réduit la diversité sur tous les sites. La diversité des espèces augmentait avec le niveau de perturbation existant avant l'incendie. La perturbation pré-incendie a influencé la nature du feu en modifiant la masse de combustible et l'humidité du sol, qui, à leur tour, ont affecté le reverdissement post-incendie en modifiant l'état du sol et les conditions microclimatiques. Les sites qui avaient été le plus perturbés avant le feu ont connu le reverdissement le plus rapide, y compris l'index de diversité et le couvert végétal les plus élevés. Parmi les sites qui n'avaient pas été perturbés avant l'incendie, les dépressions de drainage naturelles offraient les meilleures conditions de croissance après le feu. De plus, la perturbation pré-incendie a intensifié le morcellement de la surface brûlée, et la flore résiduelle des parcelles non brûlées a ajouté à la diversité floristique présente après l'incendie. Article in Journal/Newspaper Arctic Subarctic subarctique* University of Calgary Journal Hosting Canada ARCTIC 55 3 |
institution |
Open Polar |
collection |
University of Calgary Journal Hosting |
op_collection_id |
ftunivcalgaryojs |
language |
English |
topic |
Subarctic vegetation wildfire industrial corridor postfire boreal succession végétation subarctique incendie de forêt corridor industriel post-incendie boréal |
spellingShingle |
Subarctic vegetation wildfire industrial corridor postfire boreal succession végétation subarctique incendie de forêt corridor industriel post-incendie boréal Nowak, Stephanie Kershaw, G. Peter Kershaw, Linda J. Plant Diversity and Cover after Wildfire on Anthropogenically Disturbed and Undisturbed Sites in Subarctic Upland Picea mariana Forest |
topic_facet |
Subarctic vegetation wildfire industrial corridor postfire boreal succession végétation subarctique incendie de forêt corridor industriel post-incendie boréal |
description |
Postfire development of cover and diversity was studied in an upland Picea mariana-dominated forest in the Canadian Subarctic. Short-term vegetation responses of 10- and 22-year-old cleared rights-of-way and a forest site were investigated two and three growing seasons after a wildfire. Prefire and postfire investigation of the study site allowed direct comparison of species cover and frequency values, as well as the Shannon-Wiener diversity index, before and after the fire. The fire considerably reduced diversity on all sites. Species diversity increased with the level of prefire disturbance. Prefire disturbance influenced the fire's characteristics by altering the fuel load and soil moisture, which in turn affected the postfire revegetation through different soil and microclimatic conditions. The sites that were most severely disturbed before the fire experienced the most rapid revegetation, including the highest diversity index and highest plant cover. Of the sites that were undisturbed before the fire, the natural drainage swales offered the best growing conditions after the burn. Furthermore, prefire disturbance increased the patchiness of the burned area, and the residual flora of unburned patches added to postfire floristic diversity. On a étudié le développement du couvert et de la diversité après un incendie dans une forêt de haute terre dominée par Picea mariana, au Canada subarctique. Les réactions à court terme des plantes poussant dans les emprises dégagées vieilles de 10 et 22 ans, ainsi qu'un site forestier ont été l'objet de recherches deux et trois saisons de croissance après un incendie de forêt. Les travaux réalisés sur le site de l'étude avant et après le feu ont permis une comparaison directe du couvert et de la fréquence des espèces ainsi que de l'index de diversité Shannon-Wiener avant et après le feu. L'incendie a considérablement réduit la diversité sur tous les sites. La diversité des espèces augmentait avec le niveau de perturbation existant avant l'incendie. La perturbation pré-incendie a influencé la nature du feu en modifiant la masse de combustible et l'humidité du sol, qui, à leur tour, ont affecté le reverdissement post-incendie en modifiant l'état du sol et les conditions microclimatiques. Les sites qui avaient été le plus perturbés avant le feu ont connu le reverdissement le plus rapide, y compris l'index de diversité et le couvert végétal les plus élevés. Parmi les sites qui n'avaient pas été perturbés avant l'incendie, les dépressions de drainage naturelles offraient les meilleures conditions de croissance après le feu. De plus, la perturbation pré-incendie a intensifié le morcellement de la surface brûlée, et la flore résiduelle des parcelles non brûlées a ajouté à la diversité floristique présente après l'incendie. |
format |
Article in Journal/Newspaper |
author |
Nowak, Stephanie Kershaw, G. Peter Kershaw, Linda J. |
author_facet |
Nowak, Stephanie Kershaw, G. Peter Kershaw, Linda J. |
author_sort |
Nowak, Stephanie |
title |
Plant Diversity and Cover after Wildfire on Anthropogenically Disturbed and Undisturbed Sites in Subarctic Upland Picea mariana Forest |
title_short |
Plant Diversity and Cover after Wildfire on Anthropogenically Disturbed and Undisturbed Sites in Subarctic Upland Picea mariana Forest |
title_full |
Plant Diversity and Cover after Wildfire on Anthropogenically Disturbed and Undisturbed Sites in Subarctic Upland Picea mariana Forest |
title_fullStr |
Plant Diversity and Cover after Wildfire on Anthropogenically Disturbed and Undisturbed Sites in Subarctic Upland Picea mariana Forest |
title_full_unstemmed |
Plant Diversity and Cover after Wildfire on Anthropogenically Disturbed and Undisturbed Sites in Subarctic Upland Picea mariana Forest |
title_sort |
plant diversity and cover after wildfire on anthropogenically disturbed and undisturbed sites in subarctic upland picea mariana forest |
publisher |
The Arctic Institute of North America |
publishDate |
2002 |
url |
https://journalhosting.ucalgary.ca/index.php/arctic/article/view/63767 |
geographic |
Canada |
geographic_facet |
Canada |
genre |
Arctic Subarctic subarctique* |
genre_facet |
Arctic Subarctic subarctique* |
op_source |
ARCTIC; Vol. 55 No. 3 (2002): September: 215–317; 269-280 1923-1245 0004-0843 |
op_relation |
https://journalhosting.ucalgary.ca/index.php/arctic/article/view/63767/47702 https://journalhosting.ucalgary.ca/index.php/arctic/article/view/63767 |
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ARCTIC |
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55 |
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3 |
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1766290680934563840 |