Structural dynamics at boreal forest edges created by a spruce budworm outbreak

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dc.creator Franklin, Caroline Mary Adrianne
dc.creator Harper, Karen A., 1969-
dc.creator Murphy, Liam Kyte
dc.date.accessioned 2020-09-08T15:25:40Z
dc.date.available 2020-09-08T15:25:40Z
dc.date.issued 2015-06-11
dc.identifier.issn 0037-5330
dc.identifier.uri http://library2.smu.ca/xmlui/handle/01/29399
dc.description Published Version en_CA
dc.description.abstract Natural disturbances such as insect outbreaks create boundaries that influence vegetation patterns and ecological processes. To better understand the effects of natural edge creation on relatively intact forests and adjacent disturbed areas, we investigated forest structure on both sides of 30 year-old forest edges created by a spruce budworm (Choristoneura fumiferana Clemens) outbreak in the boreal forest of Cape Breton Highlands National Park, Canada. Our objectives were: 1) to determine edge influence (compared to interior forest) and forest influence (compared to disturbed areas) on vegetation structure, and 2) to gain insight into the structural development of the edges. Canopy cover, tree density, radial growth and deadwood were sampled in 5 m x 20 m plots along 120 m transects across six edges. Randomization tests were used to estimate the magnitude and distance of edge and forest influence. Narrow transition zones approximately 10 m wide characterized the spruce budworm-induced edges. Edge influence did not extend into the forest; however, forest influence on structure was detected up to 40 m from the edge into the disturbed area. We found evidence of the insect outbreak in the form of reduced radial growth during the disturbance across the entire disturbed area-forest gradient, which indicates that spruce budworm activity may not have ceased directly at the edge. Tree mortality caused by the insect outbreak resulted in snags, many of which have transformed into logs since the outbreak collapsed. Spruce budworm outbreak-induced forest edges are narrow but dynamic boundaries separating two distinct vegetation communities in the boreal landscape. en_CA
dc.description.provenance Submitted by Sherry Briere (sherry.briere@smu.ca) on 2020-09-08T15:25:40Z No. of bitstreams: 1 Harper_Karen_A_article_2015_a.pdf: 2069554 bytes, checksum: 6d3c1d8d1798140059fd96909b02691f (MD5) en
dc.description.provenance Made available in DSpace on 2020-09-08T15:25:40Z (GMT). No. of bitstreams: 1 Harper_Karen_A_article_2015_a.pdf: 2069554 bytes, checksum: 6d3c1d8d1798140059fd96909b02691f (MD5) Previous issue date: 2015-06-11 en
dc.language.iso en en_CA
dc.publisher Finnish Society of Forest Science en_CA
dc.relation.uri https://doi.org/10.14214/sf.1267
dc.rights <p xmlns:dct="http://purl.org/dc/terms/" xmlns:cc="http://creativecommons.org/ns#" class="license-text">This work is licensed under <a rel="license" href="https://creativecommons.org/licenses/by-sa/4.0">CC BY-SA 4.0<img style="height:22px!important;margin-left:3px;vertical-align:text-bottom;" src="https://mirrors.creativecommons.org/presskit/icons/cc.svg?ref=chooser-v1" /><img style="height:22px!important;margin-left:3px;vertical-align:text-bottom;" src="https://mirrors.creativecommons.org/presskit/icons/by.svg?ref=chooser-v1" /><img style="height:22px!important;margin-left:3px;vertical-align:text-bottom;" src="https://mirrors.creativecommons.org/presskit/icons/sa.svg?ref=chooser-v1" /></a></p>
dc.subject.lcsh Forests and forestry -- Nova Scotia -- Cape Breton Highlands National Park
dc.subject.lcsh Vegetation boundaries -- Nova Scotia -- Cape Breton Highlands National Park
dc.subject.lcsh Forest ecology -- Nova Scotia -- Cape Breton Highlands National Park
dc.subject.lcsh Spruce budworm -- Nova Scotia -- Cape Breton Highlands National Park
dc.title Structural dynamics at boreal forest edges created by a spruce budworm outbreak en_CA
dc.type Text en_CA
dcterms.bibliographicCitation Silva Fennica 49(3), 1267. (2015) en_CA
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Published Version: https://doi.org/10.14214/sf.1267
 
 

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