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Impacts of aggregated retention harvesting on the diversity patterns of nocturnal moth species assemblages in the mixedwood boreal forest of northwestern Alberta Open Access


Other title
Species area relationship
Forest harvesting
Aggregated green tree retention
Spatial patterns of species diversity
Boreal forest
Type of item
Degree grantor
University of Alberta
Author or creator
Bodeux, Brett B
Supervisor and department
He, Fangliang (Renewable Resources)
Examining committee member and department
Sperling, Felix (Biological Sciences)
Macdonald, Ellen (Renewable Resources)
Volney, Jan (Canada Forest Service)
Department of Renewable Resources
Conservation Biology
Date accepted
Graduation date
Master of Science
Degree level
The loss of mature forest habitat from forest harvesting represents a substantial threat to the diversity of nocturnal boreal forest moth assemblages. In this study, I used spatial patterns of species diversity to quantify the effects of aggregated green tree retention harvesting on the diversity and composition of nocturnal forest moths. Ultra-violet light traps were used to sample moths in a 400 ha of intact boreal forest and a similar sized area of harvested boreal forest in northwestern Alberta, Canada. The results showed that the harvested forest supported a significantly lower number of moth species and limited the distribution of the moth species possessing relatively narrow diet breadths. Although relatively large patches of aggregated green tree retention supported diverse moth assemblages similar in composition to those present in undisturbed boreal forest, the substantial loss of mature forest habitat caused by forest harvesting substantially reduced the overall moth species richness.
Permission is hereby granted to the University of Alberta Libraries to reproduce single copies of this thesis and to lend or sell such copies for private, scholarly or scientific research purposes only. Where the thesis is converted to, or otherwise made available in digital form, the University of Alberta will advise potential users of the thesis of these terms. The author reserves all other publication and other rights in association with the copyright in the thesis and, except as herein before provided, neither the thesis nor any substantial portion thereof may be printed or otherwise reproduced in any material form whatsoever without the author's prior written permission.
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