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The role of microhabitat associations in producing cross-taxa congruence Turvey, Shannon Lee
Abstract
Ecological interactions between taxa and environmental factors influencing the distribution of multiple taxa are both thought to generate spatial concordance, or congruence, in diversity. Observational studies have generally failed to find evidence for strong cross-taxa congruence across sites, and examples of experimental studies testing for congruence as a result of an underlying ecological mechanism are largely lacking. Here I present the results of an experimental study employing downed wood additions in a BACI design to test for an association of small mammals, carabid beetles, plants and amphibians with volume of downed wood as a possible mechanism for congruence. In addition, I tested for congruence in species richness and community similarity across these four groups. After one field season, there was no significant effect of treatment on within-group abundance, species richness or diversity. Species richness was not significantly correlated across taxa for any taxa pair. Small mammals, carabids and plants showed weak but significant congruence in community similarity, while the amphibian assemblage was not congruent with any other taxon. These results suggest that use of downed wood by these four groups does not generate congruence in diversity at fine scales, and that other ecological processes and sources of environmental variation may be more important in generating congruence in assemblage similarity. Furthermore, the potential of one taxon to act as an indicator of species-level diversity within another taxon may be limited.
Item Metadata
Title |
The role of microhabitat associations in producing cross-taxa congruence
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Creator | |
Publisher |
University of British Columbia
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Date Issued |
2007
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Description |
Ecological interactions between taxa and environmental factors influencing the distribution of
multiple taxa are both thought to generate spatial concordance, or congruence, in diversity.
Observational studies have generally failed to find evidence for strong cross-taxa congruence
across sites, and examples of experimental studies testing for congruence as a result of an
underlying ecological mechanism are largely lacking. Here I present the results of an
experimental study employing downed wood additions in a BACI design to test for an
association of small mammals, carabid beetles, plants and amphibians with volume of downed
wood as a possible mechanism for congruence. In addition, I tested for congruence in species
richness and community similarity across these four groups. After one field season, there was
no significant effect of treatment on within-group abundance, species richness or diversity.
Species richness was not significantly correlated across taxa for any taxa pair. Small mammals,
carabids and plants showed weak but significant congruence in community similarity, while the
amphibian assemblage was not congruent with any other taxon. These results suggest that use
of downed wood by these four groups does not generate congruence in diversity at fine scales,
and that other ecological processes and sources of environmental variation may be more
important in generating congruence in assemblage similarity. Furthermore, the potential of one
taxon to act as an indicator of species-level diversity within another taxon may be limited.
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Genre | |
Type | |
Language |
eng
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Date Available |
2011-03-16
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Provider |
Vancouver : University of British Columbia Library
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Rights |
For non-commercial purposes only, such as research, private study and education. Additional conditions apply, see Terms of Use https://open.library.ubc.ca/terms_of_use.
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DOI |
10.14288/1.0074952
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URI | |
Degree | |
Program | |
Affiliation | |
Degree Grantor |
University of British Columbia
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Campus | |
Scholarly Level |
Graduate
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Aggregated Source Repository |
DSpace
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Item Media
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Rights
For non-commercial purposes only, such as research, private study and education. Additional conditions apply, see Terms of Use https://open.library.ubc.ca/terms_of_use.