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Assessing Biota and Environmental Characteristics Above and Below a Low-Head Dam.

Record Type:	Language materials, manuscript : Monograph/item
Title/Author:	Assessing Biota and Environmental Characteristics Above and Below a Low-Head Dam./
Author:	Alexander, Trevor Lane.
Description:	1 online resource (93 pages)
Notes:	Source: Masters Abstracts International, Volume: 85-03.
Contained By:	Masters Abstracts International85-03.
Subject:	Ecology. -
Online resource:	click for full text (PQDT)
ISBN:	9798380368780

Assessing Biota and Environmental Characteristics Above and Below a Low-Head Dam.
Alexander, Trevor Lane.

Assessing Biota and Environmental Characteristics Above and Below a Low-Head Dam. - 1 online resource (93 pages)

Source: Masters Abstracts International, Volume: 85-03.

Thesis (M.S.)--Western Carolina University, 2023.

Includes bibliographical references

Dams are a form of anthropogenic alteration to aquatic ecosystems that can affect natural conditions and influence aquatic fauna assemblages. Depending on the size and type of a dam, the resulting effect on the aquatic environment will differ. Possible effects include altered flow rate, water temperatures, and sediment transport. Dams can also create barriers that limit fish migration or distribution of fishes, macroinvertebrates, and aquatic plant species. The focal point of this study was a low head dam, located on the Tuckasegee River in Jackson County, NC. This dam is damaged and will possibly be removed in the future. We sampled fish and macroinvertebrates at multiple sites above and below the dam to compare species assemblages. We collected benthic macroinvertebrates using a kick net in shallow riffles and a D-frame net for timed multihabitat sampling. We used backpack electrofishers to sample fish in available wadeable habitats. We used multivariate statistical analyses to determine similarity of fish and macroinvertebrate assemblages among sites. Our results indicate that the dam has had minimal effects on aquatic habitat and aquatic macroinvertebrates. We found greater fish diversity below the impoundment. We detected some species only above or below the dam. Based on the results of this study, we believe that restored connectivity to this system may improve fish diversity above the dam. Removing the dam may cause a temporary decrease in sensitive macroinvertebrates since the dam retains sediment. Substrate composition may change temporarily below the dam until the finer substrate is transported downstream. Overall, this study provides baseline data over two years that can be referenced if the dam is removed.

Electronic reproduction.
Ann Arbor, Mich. :
ProQuest,
2024

Mode of access: World Wide Web

ISBN: 9798380368780Subjects--Topical Terms:

575279
Ecology.
Subjects--Index Terms:

Aquatic environmentIndex Terms--Genre/Form:

554714
Electronic books.

Assessing Biota and Environmental Characteristics Above and Below a Low-Head Dam.
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520 $a Dams are a form of anthropogenic alteration to aquatic ecosystems that can affect natural conditions and influence aquatic fauna assemblages. Depending on the size and type of a dam, the resulting effect on the aquatic environment will differ. Possible effects include altered flow rate, water temperatures, and sediment transport. Dams can also create barriers that limit fish migration or distribution of fishes, macroinvertebrates, and aquatic plant species. The focal point of this study was a low head dam, located on the Tuckasegee River in Jackson County, NC. This dam is damaged and will possibly be removed in the future. We sampled fish and macroinvertebrates at multiple sites above and below the dam to compare species assemblages. We collected benthic macroinvertebrates using a kick net in shallow riffles and a D-frame net for timed multihabitat sampling. We used backpack electrofishers to sample fish in available wadeable habitats. We used multivariate statistical analyses to determine similarity of fish and macroinvertebrate assemblages among sites. Our results indicate that the dam has had minimal effects on aquatic habitat and aquatic macroinvertebrates. We found greater fish diversity below the impoundment. We detected some species only above or below the dam. Based on the results of this study, we believe that restored connectivity to this system may improve fish diversity above the dam. Removing the dam may cause a temporary decrease in sensitive macroinvertebrates since the dam retains sediment. Substrate composition may change temporarily below the dam until the finer substrate is transported downstream. Overall, this study provides baseline data over two years that can be referenced if the dam is removed.
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650 4 $a Water resources management. $3 1178858
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