Soil Modulation of Ecosystem Response to Climate Forcing and Change Across the US Desert Southwest

Persistent Link:
http://hdl.handle.net/10150/323416
Title:
Soil Modulation of Ecosystem Response to Climate Forcing and Change Across the US Desert Southwest
Author:
Shepard, Christopher
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:
The dryland ecosystems of the US Desert Southwest (SW) are dependent on soil moisture for aboveground productivity; the generation of soil moisture in the SW is dependent on both soil physical properties and climate forcing. This study is one of the first regional point-scale analyses that explores the role of soil physical properties in modulating aboveground vegetation dynamics in response to climate forcing in the SW. Soil texture accounted for significant differences in average aboveground primary productivity across the SW. However, soil texture could not account for differences in inter-annual aboveground productivity variation across the SW. Subsurface soil texture was tightly coupled with precipitation seasonality in accounting for differences in long-term average seasonal aboveground productivity in the Mojave and Sonoran Deserts. The results of this study indicate that the subsurface is a significant factor in modulating aboveground primary productivity, and needs to be included in future modeling exercises of dryland ecosystem response to climate forcing and change.
Type:
text; Electronic Thesis
Keywords:
dryland; soil texture; subsurface; US Southwest; Soil, Water & Environmental Science; aboveground productivity
Degree Name:
M.S.
Degree Level:
masters
Degree Program:
Graduate College; Soil, Water & Environmental Science
Degree Grantor:
University of Arizona
Advisor:
Rasmussen, Craig

Full metadata record

DC FieldValue Language
dc.language.isoen_USen
dc.titleSoil Modulation of Ecosystem Response to Climate Forcing and Change Across the US Desert Southwesten_US
dc.creatorShepard, Christopheren_US
dc.contributor.authorShepard, Christopheren_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.abstractThe dryland ecosystems of the US Desert Southwest (SW) are dependent on soil moisture for aboveground productivity; the generation of soil moisture in the SW is dependent on both soil physical properties and climate forcing. This study is one of the first regional point-scale analyses that explores the role of soil physical properties in modulating aboveground vegetation dynamics in response to climate forcing in the SW. Soil texture accounted for significant differences in average aboveground primary productivity across the SW. However, soil texture could not account for differences in inter-annual aboveground productivity variation across the SW. Subsurface soil texture was tightly coupled with precipitation seasonality in accounting for differences in long-term average seasonal aboveground productivity in the Mojave and Sonoran Deserts. The results of this study indicate that the subsurface is a significant factor in modulating aboveground primary productivity, and needs to be included in future modeling exercises of dryland ecosystem response to climate forcing and change.en_US
dc.typetexten
dc.typeElectronic Thesisen
dc.subjectdrylanden_US
dc.subjectsoil textureen_US
dc.subjectsubsurfaceen_US
dc.subjectUS Southwesten_US
dc.subjectSoil, Water & Environmental Scienceen_US
dc.subjectaboveground productivityen_US
thesis.degree.nameM.S.en_US
thesis.degree.levelmastersen_US
thesis.degree.disciplineGraduate Collegeen_US
thesis.degree.disciplineSoil, Water & Environmental Scienceen_US
thesis.degree.grantorUniversity of Arizonaen_US
dc.contributor.advisorRasmussen, Craigen_US
dc.contributor.committeememberCrimmins, Michaelen_US
dc.contributor.committeememberSchaap, Marcelen_US
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