Show simple item record

dc.contributor.advisorMatter, William J.en_US
dc.contributor.authorBell-McCaulou, Teresa Margaret, 1954-*
dc.creatorBell-McCaulou, Teresa Margaret, 1954-en_US
dc.date.accessioned2013-04-03T13:22:38Z
dc.date.available2013-04-03T13:22:38Z
dc.date.issued1993en_US
dc.identifier.urihttp://hdl.handle.net/10150/278381
dc.description.abstractI determined that Corbicula fluminea can be used as a bioindicator on the lower Colorado River. I analyzed tissue samples for trace element concentrations. Selenium and arsenic were elevated above U.S. background levels at 89% and 83% (respectively), of the sites. Selenium concentrations were significantly higher in backwaters than at river sites. Selenium in clams predicts the contamination state of a site 78% of the time. There is a strong correlation between selenium concentrations in clams and selenium concentrations in vascular aquatic plants (r²) and carnivorous birds (r²). The white morph of C. fluminea is more prevalent at northern and backwater sites than the purple morph. Selenium levels in clams at several sites exceeded levels that have been shown to result in teratogenicity for birds in laboratory studies. Birds that eat clams in the study area could have increased risk of lowered reproductive success.
dc.language.isoen_USen_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.subjectBiology, Ecology.en_US
dc.subjectEnvironmental Sciences.en_US
dc.subjectBiology, Limnology.en_US
dc.titleCorbicula fluminea as a bioindicator on the lower Colorado Riveren_US
dc.typetexten_US
dc.typeThesis-Reproduction (electronic)en_US
thesis.degree.grantorUniversity of Arizonaen_US
thesis.degree.levelmastersen_US
dc.identifier.proquest1356797en_US
thesis.degree.disciplineGraduate Collegeen_US
thesis.degree.disciplineRenewable natural resourcesen_US
thesis.degree.nameM.S.en_US
dc.identifier.bibrecord.b31459481en_US
refterms.dateFOA2018-06-24T18:32:40Z
html.description.abstractI determined that Corbicula fluminea can be used as a bioindicator on the lower Colorado River. I analyzed tissue samples for trace element concentrations. Selenium and arsenic were elevated above U.S. background levels at 89% and 83% (respectively), of the sites. Selenium concentrations were significantly higher in backwaters than at river sites. Selenium in clams predicts the contamination state of a site 78% of the time. There is a strong correlation between selenium concentrations in clams and selenium concentrations in vascular aquatic plants (r²) and carnivorous birds (r²). The white morph of C. fluminea is more prevalent at northern and backwater sites than the purple morph. Selenium levels in clams at several sites exceeded levels that have been shown to result in teratogenicity for birds in laboratory studies. Birds that eat clams in the study area could have increased risk of lowered reproductive success.


Files in this item

Thumbnail
Name:
azu_td_1356797_sip1_m.pdf
Size:
1.711Mb
Format:
PDF

This item appears in the following Collection(s)

Show simple item record