Persistent Link:
http://hdl.handle.net/10150/294022
Title:
Do Red Squirrel Middens Promote Vertebrate Species Diversity?
Author:
Posthumus, Erin Elizabeth
Issue Date:
2013
Publisher:
The University of Arizona.
Rights:
Copyright © is held by the author. Digital access to this material is made possible by the University Libraries, University of Arizona. Further transmission, reproduction or presentation (such as public display or performance) of protected items is prohibited except with permission of the author.
Abstract:
The modifications animals make to their environments can be critical to species diversity. Red squirrels (Tamiasciurus hudsonicus) create large piles of conifer cone debris (middens) and are hypothesized to function as a keystone species due to positive associations between middens and other vertebrate species. We assessed vegetation and landscape structure at middens with a resident red squirrel for varying consistencies over the prior 5 years and surveyed mammals and birds at the community and population level. After accounting for vegetation and landscape characteristics, red squirrel-created resources positively influenced species richness of medium and large mammals and ground foraging birds, abundance of deer mice (Peromyscus maniculatus) and ground foraging birds, and activity of cliff chipmunks (Tamias dorsalis). Increased knowledge of the interaction strength of the red squirrel with its environment may be used to inform decisions in forest management and restoration and offer insight on the conservation value of larderhoarding mammals.
Type:
text; Electronic Thesis
Keywords:
ecosystem engineer; keystone species; larderhoarding; red squirrel; Tamiasciurus hudsonicus; Natural Resources; diversity
Degree Name:
M.S.
Degree Level:
masters
Degree Program:
Graduate College; Natural Resources
Degree Grantor:
University of Arizona
Advisor:
Koprowski, John L.

Full metadata record

DC FieldValue Language
dc.language.isoenen_US
dc.titleDo Red Squirrel Middens Promote Vertebrate Species Diversity?en_US
dc.creatorPosthumus, Erin Elizabethen_US
dc.contributor.authorPosthumus, Erin Elizabethen_US
dc.date.issued2013-
dc.publisherThe University of Arizona.en_US
dc.rightsCopyright © is held by the author. Digital access to this material is made possible by the University Libraries, University of Arizona. Further transmission, reproduction or presentation (such as public display or performance) of protected items is prohibited except with permission of the author.en_US
dc.description.abstractThe modifications animals make to their environments can be critical to species diversity. Red squirrels (Tamiasciurus hudsonicus) create large piles of conifer cone debris (middens) and are hypothesized to function as a keystone species due to positive associations between middens and other vertebrate species. We assessed vegetation and landscape structure at middens with a resident red squirrel for varying consistencies over the prior 5 years and surveyed mammals and birds at the community and population level. After accounting for vegetation and landscape characteristics, red squirrel-created resources positively influenced species richness of medium and large mammals and ground foraging birds, abundance of deer mice (Peromyscus maniculatus) and ground foraging birds, and activity of cliff chipmunks (Tamias dorsalis). Increased knowledge of the interaction strength of the red squirrel with its environment may be used to inform decisions in forest management and restoration and offer insight on the conservation value of larderhoarding mammals.en_US
dc.typetexten_US
dc.typeElectronic Thesisen_US
dc.subjectecosystem engineeren_US
dc.subjectkeystone speciesen_US
dc.subjectlarderhoardingen_US
dc.subjectred squirrelen_US
dc.subjectTamiasciurus hudsonicusen_US
dc.subjectNatural Resourcesen_US
dc.subjectdiversityen_US
thesis.degree.nameM.S.en_US
thesis.degree.levelmastersen_US
thesis.degree.disciplineGraduate Collegeen_US
thesis.degree.disciplineNatural Resourcesen_US
thesis.degree.grantorUniversity of Arizonaen_US
dc.contributor.advisorKoprowski, John L.en_US
dc.contributor.committeememberMannan, R. Williamen_US
dc.contributor.committeememberSteidl, Robert J.en_US
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