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Water Quality's Influence on the Occ...

Yates, Brandon L.

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Water Quality's Influence on the Occupancy of Two Jeopardized Fishes: The Blackside Dace (Chrosomus cumberlandensis) and the Cumberland Arrow Darter (Etheostoma sagitta) in Northeast Tennessee.

紀錄類型:	書目-電子資源 : Monograph/item
正題名/作者:	Water Quality's Influence on the Occupancy of Two Jeopardized Fishes: The Blackside Dace (Chrosomus cumberlandensis) and the Cumberland Arrow Darter (Etheostoma sagitta) in Northeast Tennessee./
作者:	Yates, Brandon L.
出版者:	Ann Arbor : ProQuest Dissertations & Theses, : 2017,
面頁冊數:	91 p.
附註:	Source: Masters Abstracts International, Volume: 56-06.
Contained By:	Masters Abstracts International56-06(E).
標題:	Ecology. -
電子資源:	http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=10605069
ISBN:	9780355137934

Water Quality's Influence on the Occupancy of Two Jeopardized Fishes: The Blackside Dace (Chrosomus cumberlandensis) and the Cumberland Arrow Darter (Etheostoma sagitta) in Northeast Tennessee.
Yates, Brandon L.

Water Quality's Influence on the Occupancy of Two Jeopardized Fishes: The Blackside Dace (Chrosomus cumberlandensis) and the Cumberland Arrow Darter (Etheostoma sagitta) in Northeast Tennessee. - Ann Arbor : ProQuest Dissertations & Theses, 2017 - 91 p.

Source: Masters Abstracts International, Volume: 56-06.

Thesis (M.S.)--Morehead State University, 2017.

The Cumberland River drainage in northeastern Tennessee hosts several rare endemic fish species, including the Blackside Dace (Chrosomus cumberlandensis) and the Cumberland Arrow Darter (Etheostoma sagitta). Declines of these two species have been attributed to anthropogenic disturbances (primarily logging and coal extraction). This research examined abundance and distribution of these two species at 47 sites within small streams located in Scott, Claiborne, and Campbell counties in Tennessee. Backpack electrofishing was employed to sample fishes in a quantitative protocol designed to allow analysis of fish distribution and abundance, using occupancy modeling analysis. To determine how water quality affects the distribution and abundance of these target species temperature, dissolved oxygen (DO), conductivity, pH, total suspended solids (TSS), alkalinity, dissolved NH3, dissolved NO3--, dissolved SO42-- , dissolved Fe, dissolved PO43--, total nitrogen (TN), and total phosphorus (TP) were measured. Blackside Dace were only encountered at ten sites; while Cumberland Arrow Darters were observed at 18 sites. Pair-wise comparisons indicated TN and Kentucky Index of Biotic Integrity (KIBI) were significantly different (p<0.050) between sites with and without Blackside Dace. Conductivity and KIBI were statistically different (p<0.050) between sites with and without Cumberland Arrow Darters. Principle component analysis (PCA) indicated occupied sites had higher concentration of NO3--, and lower pH, conductivity, alkalinity, SO42--, Fe, and NH3 when compared to unoccupied sites for both species. Occupancy of Blackside Dace in this study was estimated to be 0.1531, and Cumberland Arrow Darter occupancy to be 0.3869. Using conductivity as a covariate, occupancy of Blackside Dace was higher in streams below 343 microS/cm (0.1934) than in streams with conductivities above 343 microS/cm (0.0749). Cumberland Arrow Darters showed the same trend; sites with conductivities above 343 microS/cm (0.1409) had lower estimated occupancies than sites with conductivities below 343 microS/cm (0.5089). This study supports the findings of previous research indicating these fishes respond to changes in water quality, and that water quality measures, especially conductivity, can serve as a tool to monitor stream disturbances that affect fishes. This study provides independent support for the use of conductivity as a monitoring tool, and its strong association with these rare fishes' distribution and abundance.

ISBN: 9780355137934Subjects--Topical Terms:

516476
Ecology.

Water Quality's Influence on the Occupancy of Two Jeopardized Fishes: The Blackside Dace (Chrosomus cumberlandensis) and the Cumberland Arrow Darter (Etheostoma sagitta) in Northeast Tennessee.
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