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Permanent link (DOI): https://doi.org/10.7939/R3S31D

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Responses of aquatic invertebrate assemblages to an iron treatment aimed at reducing internal phosphorus loading Open Access

Descriptions

Other title
Subject/Keyword
benthic invertebrates
eutrophication
mesocosms
zooplankton
iron remediation
Type of item
Thesis
Degree grantor
University of Alberta
Author or creator
Wilson, Lindsey R
Supervisor and department
Proctor, Heather (Biological Sciences)
Schindler, David (Biological Sciences)
Examining committee member and department
St Louis, Vincent (Biological Sciences)
Vinebrooke, Rolf (Biological Sciences)
Department
Department of Biological Sciences
Specialization
Ecology
Date accepted
2013-01-29T14:40:39Z
Graduation date
2013-06
Degree
Master of Science
Degree level
Master's
Abstract
This mesocosm study investigates changes in aquatic invertebrate assemblages in response to iron application, a remediation treatment that inhibits internal phosphorus loading in culturally-eutrophied freshwaters. To determine the effects of ferric chloride application on aquatic invertebrates, I analyzed the changes in abundance, biomass, and diversity of zooplankton and zoobenthos assemblages over a logarithmic scale of ferric chloride treatment doses applied to 12 experimental mesocosms installed in Nakamun Lake, AB. Zooplankton abundance and biomass significantly decreased immediately following iron treatment, likely through acidification, co-precipitation with the flocculant, and declines in phytoplankton populations. However, zooplankton assemblages recovered within one month after application. I detected no iron-induced changes in zoobenthos assemblages, perhaps because taxa present in hypereutrophic lakes are typically pollution-tolerant. My results indicate that ferric chloride application has only minor and short-term effects on aquatic invertebrate assemblages, so this remediation treatment may be a suitable tool for rehabilitation of eutrophied lakes.
Language
English
DOI
doi:10.7939/R3S31D
Rights
Permission is hereby granted to the University of Alberta Libraries to reproduce single copies of this thesis and to lend or sell such copies for private, scholarly or scientific research purposes only. Where the thesis is converted to, or otherwise made available in digital form, the University of Alberta will advise potential users of the thesis of these terms. The author reserves all other publication and other rights in association with the copyright in the thesis and, except as herein before provided, neither the thesis nor any substantial portion thereof may be printed or otherwise reproduced in any material form whatsoever without the author's prior written permission.
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File format: pdf (Portable Document Format)
Mime type: application/pdf
File size: 11487204
Last modified: 2015:10:12 21:05:17-06:00
Filename: Wilson_Lindsey_Spring 2013.pdf
Original checksum: d643d0ae9fc15e162b9e72fa7846d024
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Status message: File header gives version as 1.4, but catalog dictionary gives version as 1.3
File title: LWilson Thesis DRAFT 4
File author: Lindsey Wilson
Page count: 118
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