The effects of changes in flow on the ecological condition of two Arizona streams: analysis of trends in water chemistry and structure of biological assemblages

Persistent Link:
http://hdl.handle.net/10150/191336
Title:
The effects of changes in flow on the ecological condition of two Arizona streams: analysis of trends in water chemistry and structure of biological assemblages
Author:
Bymers, Leah.
Issue Date:
2005
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:
Analysis of climate observations have led researchers to predict that precipitation in the Southwest, USA will become more extreme in its variability. This prediction combined with increasing demand for water for human use support the claim that streams in the Southwest will experience flows lower than historic minima in the future. In order to protect stream communities, the effects of decreasing flow need to be studied. I investigated how changes in streamflow and base flow of the San Pedro River and West Clear Creek, AZ, affect water chemistry, fish, macroinvertebrates, and periphyton. Regression analysis showed the macroinvertebrate pollution-tolerance index and percent Collectors were significantly negatively related to flow. This indicates a depression of pollution-intolerant species with lower flows. Several other strong relationships were noted, however, long-term data are needed in order to make conclusions about the future effects of decreased flow on the biological assemblages of arid perennial streams.
Type:
Thesis-Reproduction (electronic); text
LCSH Subjects:
Hydrology.; Streamflow -- Arizona.; Streamflow -- San Pedro River (Mexico and Ariz.); Streamflow -- Arizona -- West Clear Creek.; Water chemistry -- San Pedro River (Mexico and Ariz.); Water chemistry -- Arizona -- West Clear Creek.
Degree Name:
M.S.
Degree Level:
masters
Degree Program:
Natural Resources; Graduate College
Degree Grantor:
University of Arizona
Committee Chair:
Matter, William

Full metadata record

DC FieldValue Language
dc.language.isoenen_US
dc.titleThe effects of changes in flow on the ecological condition of two Arizona streams: analysis of trends in water chemistry and structure of biological assemblagesen_US
dc.creatorBymers, Leah.en_US
dc.contributor.authorBymers, Leah.en_US
dc.date.issued2005en_US
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.abstractAnalysis of climate observations have led researchers to predict that precipitation in the Southwest, USA will become more extreme in its variability. This prediction combined with increasing demand for water for human use support the claim that streams in the Southwest will experience flows lower than historic minima in the future. In order to protect stream communities, the effects of decreasing flow need to be studied. I investigated how changes in streamflow and base flow of the San Pedro River and West Clear Creek, AZ, affect water chemistry, fish, macroinvertebrates, and periphyton. Regression analysis showed the macroinvertebrate pollution-tolerance index and percent Collectors were significantly negatively related to flow. This indicates a depression of pollution-intolerant species with lower flows. Several other strong relationships were noted, however, long-term data are needed in order to make conclusions about the future effects of decreased flow on the biological assemblages of arid perennial streams.en_US
dc.description.notehydrology collectionen_US
dc.typeThesis-Reproduction (electronic)en_US
dc.typetexten_US
dc.subject.lcshHydrology.en_US
dc.subject.lcshStreamflow -- Arizona.en_US
dc.subject.lcshStreamflow -- San Pedro River (Mexico and Ariz.)en_US
dc.subject.lcshStreamflow -- Arizona -- West Clear Creek.en_US
dc.subject.lcshWater chemistry -- San Pedro River (Mexico and Ariz.)en_US
dc.subject.lcshWater chemistry -- Arizona -- West Clear Creek.en_US
thesis.degree.nameM.S.en_US
thesis.degree.levelmastersen_US
thesis.degree.disciplineNatural Resourcesen_US
thesis.degree.disciplineGraduate Collegeen_US
thesis.degree.grantorUniversity of Arizonaen_US
dc.contributor.chairMatter, Williamen_US
dc.contributor.committeememberWalker, Daviden_US
dc.contributor.committeememberMatter, Billen_US
dc.contributor.committeememberFitzsimmons, Kevinen_US
dc.contributor.committeememberCordy, Gailen_US
dc.identifier.oclc213468632en_US
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