Ants in an Arid Urban Landscape: Biodiversity, Community Composition and Factors behind the Success of an Exotic Ant Species

Persistent Link:
http://hdl.handle.net/10150/347164
Title:
Ants in an Arid Urban Landscape: Biodiversity, Community Composition and Factors behind the Success of an Exotic Ant Species
Author:
Bada, Javier Gerardo Miguelena
Issue Date:
2014
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:
Urbanization, the creation of cities and their growth, is a process with profound implications for the diversity and community composition of local ecosystems. Urban environments are made up of a diverse patchwork of natural, seminatural and modified habitats that might harbor different plant and animal communities. Frequently, they include invasive or exotic organisms. In arid environments in particular, irrigated spaces constitute a novel habitat that contrasts heavily with natural environments. In the present study, I considered the biodiversity and composition of the ant communities in contrasting environments within the urban area of Tucson, Arizona. First, I assessed the relationship between plant productivity, measured using satellite imagery, ant abundance and ant diversity in irrigated parks, urban desert remnants and natural desert habitat. I found no significant differences in ant diversity among these habitats, despite clear differences in abundance and productivity. Next I considered the differences in ant species composition among the assemblages in the same three habitats. I found that each habitat included a distinct ant community, although those from desert remnants and natural desert were functionally similar to each other. Irrigated parks showed a potential to act as refuges for ant species threatened by the effects of climate change, but they also included a greater abundance of ants considered pests. Finally, I considered some of the characteristics behind the success of the only widespread exotic ant species found in urban habitats in Tucson: the dark rover ant (Brachymyrmex patagonicus).These ants were found in large numbers in every park sampled. As a recently introduced species, little was known of their biology. Colonies of these ants displayed aggression among each other which makes it impossible for them to form large interconnected networks of nests. Although colonies occupied nearby nests in the laboratory, under field conditions, each colony inhabited a small territory.
Type:
text; Electronic Dissertation
Keywords:
community ecology; diversity; parks; species-energy relationship; urban; ants; Entomology
Degree Name:
Ph.D.
Degree Level:
doctoral
Degree Program:
Graduate College; Entomology
Degree Grantor:
University of Arizona
Advisor:
Baker, Paul B.

Full metadata record

DC FieldValue Language
dc.language.isoen_USen
dc.titleAnts in an Arid Urban Landscape: Biodiversity, Community Composition and Factors behind the Success of an Exotic Ant Speciesen_US
dc.creatorBada, Javier Gerardo Miguelenaen_US
dc.contributor.authorBada, Javier Gerardo Miguelenaen_US
dc.date.issued2014-
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.abstractUrbanization, the creation of cities and their growth, is a process with profound implications for the diversity and community composition of local ecosystems. Urban environments are made up of a diverse patchwork of natural, seminatural and modified habitats that might harbor different plant and animal communities. Frequently, they include invasive or exotic organisms. In arid environments in particular, irrigated spaces constitute a novel habitat that contrasts heavily with natural environments. In the present study, I considered the biodiversity and composition of the ant communities in contrasting environments within the urban area of Tucson, Arizona. First, I assessed the relationship between plant productivity, measured using satellite imagery, ant abundance and ant diversity in irrigated parks, urban desert remnants and natural desert habitat. I found no significant differences in ant diversity among these habitats, despite clear differences in abundance and productivity. Next I considered the differences in ant species composition among the assemblages in the same three habitats. I found that each habitat included a distinct ant community, although those from desert remnants and natural desert were functionally similar to each other. Irrigated parks showed a potential to act as refuges for ant species threatened by the effects of climate change, but they also included a greater abundance of ants considered pests. Finally, I considered some of the characteristics behind the success of the only widespread exotic ant species found in urban habitats in Tucson: the dark rover ant (Brachymyrmex patagonicus).These ants were found in large numbers in every park sampled. As a recently introduced species, little was known of their biology. Colonies of these ants displayed aggression among each other which makes it impossible for them to form large interconnected networks of nests. Although colonies occupied nearby nests in the laboratory, under field conditions, each colony inhabited a small territory.en_US
dc.typetexten
dc.typeElectronic Dissertationen
dc.subjectcommunity ecologyen_US
dc.subjectdiversityen_US
dc.subjectparksen_US
dc.subjectspecies-energy relationshipen_US
dc.subjecturbanen_US
dc.subjectantsen_US
dc.subjectEntomologyen_US
thesis.degree.namePh.D.en_US
thesis.degree.leveldoctoralen_US
thesis.degree.disciplineGraduate Collegeen_US
thesis.degree.disciplineEntomologyen_US
thesis.degree.grantorUniversity of Arizonaen_US
dc.contributor.advisorBaker, Paul B.en_US
dc.contributor.committeememberBaker, Paul B.en_US
dc.contributor.committeememberDornhaus, Annaen_US
dc.contributor.committeememberCarriere, Yvesen_US
dc.contributor.committeememberWheeler, Diana E.en_US
dc.contributor.committeememberBronstein, Judithen_US
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