Patterns of balsam fir foliar production and growth in relation to defoliation by spruce budworm
Changes in foliar production caused by spruce budworm (Choristoneurafumiferana (Clem.)) defoliation and patterns of volume increment of surviving trees during and after the outbreak were determined in 20 mature balsam fir (Abiesbalsamea (L.) Mill.) stands on Cape Breton Island, Nova Scotia. Followin...
Published in: | Canadian Journal of Forest Research |
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Language: | English |
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Canadian Science Publishing
1995
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Online Access: | http://dx.doi.org/10.1139/x95-125 http://www.nrcresearchpress.com/doi/pdf/10.1139/x95-125 |
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crcansciencepubl:10.1139/x95-125 2024-10-13T14:06:27+00:00 Patterns of balsam fir foliar production and growth in relation to defoliation by spruce budworm Ostaff, Donald P. MacLean, David A. 1995 http://dx.doi.org/10.1139/x95-125 http://www.nrcresearchpress.com/doi/pdf/10.1139/x95-125 en eng Canadian Science Publishing http://www.nrcresearchpress.com/page/about/CorporateTextAndDataMining Canadian Journal of Forest Research volume 25, issue 7, page 1128-1136 ISSN 0045-5067 1208-6037 journal-article 1995 crcansciencepubl https://doi.org/10.1139/x95-125 2024-09-19T04:09:48Z Changes in foliar production caused by spruce budworm (Choristoneurafumiferana (Clem.)) defoliation and patterns of volume increment of surviving trees during and after the outbreak were determined in 20 mature balsam fir (Abiesbalsamea (L.) Mill.) stands on Cape Breton Island, Nova Scotia. Following the cessation of defoliation, the number of shoots increased 4-fold and mean shoot length doubled, resulting in a 12-fold increase in needle biomass. Average specific volume increment declined from 0.17–0.25 to 0.02–0.04 cm 3 •cm −2 •year −1 after 4 years of severe defoliation; maximum increment reduction was 74–92%. Periodic radial increment and volume increment reduction (percent of mean increment in the previous decade) were both significantly related to cumulative (summed current annual) defoliation; a logistic regression equation explained 77% of the variation in volume loss. Differences in growth recovery among trees were determined by the temporal patterns of defoliation, with a 1-year lag before the beginning of volume increment recovery. Following 5 to 8 years of recovery, surviving trees had regained 48–82% of their predefoliation increment; however, absolute volume losses during the outbreak averaged 12–33 dm 3 /tree, or 32–48%. Article in Journal/Newspaper Breton Island Canadian Science Publishing Breton Island ENVELOPE(141.383,141.383,-66.800,-66.800) Canadian Journal of Forest Research 25 7 1128 1136 |
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Open Polar |
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Canadian Science Publishing |
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crcansciencepubl |
language |
English |
description |
Changes in foliar production caused by spruce budworm (Choristoneurafumiferana (Clem.)) defoliation and patterns of volume increment of surviving trees during and after the outbreak were determined in 20 mature balsam fir (Abiesbalsamea (L.) Mill.) stands on Cape Breton Island, Nova Scotia. Following the cessation of defoliation, the number of shoots increased 4-fold and mean shoot length doubled, resulting in a 12-fold increase in needle biomass. Average specific volume increment declined from 0.17–0.25 to 0.02–0.04 cm 3 •cm −2 •year −1 after 4 years of severe defoliation; maximum increment reduction was 74–92%. Periodic radial increment and volume increment reduction (percent of mean increment in the previous decade) were both significantly related to cumulative (summed current annual) defoliation; a logistic regression equation explained 77% of the variation in volume loss. Differences in growth recovery among trees were determined by the temporal patterns of defoliation, with a 1-year lag before the beginning of volume increment recovery. Following 5 to 8 years of recovery, surviving trees had regained 48–82% of their predefoliation increment; however, absolute volume losses during the outbreak averaged 12–33 dm 3 /tree, or 32–48%. |
format |
Article in Journal/Newspaper |
author |
Ostaff, Donald P. MacLean, David A. |
spellingShingle |
Ostaff, Donald P. MacLean, David A. Patterns of balsam fir foliar production and growth in relation to defoliation by spruce budworm |
author_facet |
Ostaff, Donald P. MacLean, David A. |
author_sort |
Ostaff, Donald P. |
title |
Patterns of balsam fir foliar production and growth in relation to defoliation by spruce budworm |
title_short |
Patterns of balsam fir foliar production and growth in relation to defoliation by spruce budworm |
title_full |
Patterns of balsam fir foliar production and growth in relation to defoliation by spruce budworm |
title_fullStr |
Patterns of balsam fir foliar production and growth in relation to defoliation by spruce budworm |
title_full_unstemmed |
Patterns of balsam fir foliar production and growth in relation to defoliation by spruce budworm |
title_sort |
patterns of balsam fir foliar production and growth in relation to defoliation by spruce budworm |
publisher |
Canadian Science Publishing |
publishDate |
1995 |
url |
http://dx.doi.org/10.1139/x95-125 http://www.nrcresearchpress.com/doi/pdf/10.1139/x95-125 |
long_lat |
ENVELOPE(141.383,141.383,-66.800,-66.800) |
geographic |
Breton Island |
geographic_facet |
Breton Island |
genre |
Breton Island |
genre_facet |
Breton Island |
op_source |
Canadian Journal of Forest Research volume 25, issue 7, page 1128-1136 ISSN 0045-5067 1208-6037 |
op_rights |
http://www.nrcresearchpress.com/page/about/CorporateTextAndDataMining |
op_doi |
https://doi.org/10.1139/x95-125 |
container_title |
Canadian Journal of Forest Research |
container_volume |
25 |
container_issue |
7 |
container_start_page |
1128 |
op_container_end_page |
1136 |
_version_ |
1812812609926201344 |