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A Diatom-Based Water Quality Metric ...

Woolam, Leah Alexis.

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A Diatom-Based Water Quality Metric for Texas State-Threatened Mussels (Unionidae): Mesocosm Experiments and Field Applications.

Record Type:	Electronic resources : Monograph/item
Title/Author:	A Diatom-Based Water Quality Metric for Texas State-Threatened Mussels (Unionidae): Mesocosm Experiments and Field Applications./
Author:	Woolam, Leah Alexis.
Published:	Ann Arbor : ProQuest Dissertations & Theses, : 2019,
Description:	76 p.
Notes:	Source: Masters Abstracts International, Volume: 81-06.
Contained By:	Masters Abstracts International81-06.
Subject:	Biology. -
Online resource:	http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=27546108
ISBN:	9781392895221

A Diatom-Based Water Quality Metric for Texas State-Threatened Mussels (Unionidae): Mesocosm Experiments and Field Applications.
Woolam, Leah Alexis.

A Diatom-Based Water Quality Metric for Texas State-Threatened Mussels (Unionidae): Mesocosm Experiments and Field Applications. - Ann Arbor : ProQuest Dissertations & Theses, 2019 - 76 p.

Source: Masters Abstracts International, Volume: 81-06.

Thesis (M.S.)--Tarleton State University, 2019.

This item must not be sold to any third party vendors.

Freshwater mussels are among the most imperiled group of aquatic invertebrates, with over 72% of North American species threatened or endangered. As a major river in Texas, the Colorado River has ~23 unionid species and presents an opportunity for the implementation of mussel conservation practices. Freshwater mussels can be specialized based on their environmental optima and sensitivity, so habitat selection is crucial for prioritizing conservation areas and introducing new populations. In order to evaluate the feasibility of reintroduction efforts, tailored a diatom-based water quality metric was developed using artificial streams constructed to simulate natural stream conditions in the Colorado River. A 10-week experiment cultured and monitored shifts in diatom assemblages under manipulated drought and nutrient conditions. Some notable community shifts were the loss of Cyclostephanos dubius in the early weeks, the steady increase in the Nitzschia spp., and the dominance of Rhopalodia gibba in the final weeks. By the end of the experiment, both high water streams converged on similar assemblage structure. The low water streams, however, diverged somewhat in species composition, yet were more comparable to each other than to the assemblages in the two high water streams. Based on the results of the artificial stream experiments, an Index of Biotic Integrity (IBI) was developed, which were applied in the field to assess mussel habitat quality in the middle Colorado River. There was no significant difference between the three sites at which ground truth surveys were conducted. This study suggests that additional factors to diatom assemblages, such as substrate type, drought conditions, and the presence of fish hosts for dispersal, should be considered when assessing the habitat quality of potential mussel relocation sites.

ISBN: 9781392895221Subjects--Topical Terms:

522710
Biology.

A Diatom-Based Water Quality Metric for Texas State-Threatened Mussels (Unionidae): Mesocosm Experiments and Field Applications.
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520 $a Freshwater mussels are among the most imperiled group of aquatic invertebrates, with over 72% of North American species threatened or endangered. As a major river in Texas, the Colorado River has ~23 unionid species and presents an opportunity for the implementation of mussel conservation practices. Freshwater mussels can be specialized based on their environmental optima and sensitivity, so habitat selection is crucial for prioritizing conservation areas and introducing new populations. In order to evaluate the feasibility of reintroduction efforts, tailored a diatom-based water quality metric was developed using artificial streams constructed to simulate natural stream conditions in the Colorado River. A 10-week experiment cultured and monitored shifts in diatom assemblages under manipulated drought and nutrient conditions. Some notable community shifts were the loss of Cyclostephanos dubius in the early weeks, the steady increase in the Nitzschia spp., and the dominance of Rhopalodia gibba in the final weeks. By the end of the experiment, both high water streams converged on similar assemblage structure. The low water streams, however, diverged somewhat in species composition, yet were more comparable to each other than to the assemblages in the two high water streams. Based on the results of the artificial stream experiments, an Index of Biotic Integrity (IBI) was developed, which were applied in the field to assess mussel habitat quality in the middle Colorado River. There was no significant difference between the three sites at which ground truth surveys were conducted. This study suggests that additional factors to diatom assemblages, such as substrate type, drought conditions, and the presence of fish hosts for dispersal, should be considered when assessing the habitat quality of potential mussel relocation sites.
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