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Impact of Water Fluctuations and Int...

Papraniku, Isabel F.

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Impact of Water Fluctuations and Intermittency on Stream Fish, Fish Microbiome, Water Microbiota, and Invertebrate Communities.

紀錄類型:	書目-電子資源 : Monograph/item
正題名/作者:	Impact of Water Fluctuations and Intermittency on Stream Fish, Fish Microbiome, Water Microbiota, and Invertebrate Communities./
作者:	Papraniku, Isabel F.
出版者:	Ann Arbor : ProQuest Dissertations & Theses, : 2018,
面頁冊數:	73 p.
附註:	Source: Masters Abstracts International, Volume: 80-05.
Contained By:	Masters Abstracts International80-05.
標題:	Molecular biology. -
電子資源:	http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=10843068
ISBN:	9780438466173

Impact of Water Fluctuations and Intermittency on Stream Fish, Fish Microbiome, Water Microbiota, and Invertebrate Communities.
Papraniku, Isabel F.

Impact of Water Fluctuations and Intermittency on Stream Fish, Fish Microbiome, Water Microbiota, and Invertebrate Communities. - Ann Arbor : ProQuest Dissertations & Theses, 2018 - 73 p.

Source: Masters Abstracts International, Volume: 80-05.

Thesis (M.S.)--Tennessee Technological University, 2018.

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

As part of their natural hydrology, intermittent streams experience periodic disruption in hydrologic connectivity caused by declines in the water table. Over-extraction of groundwater results in similar hydrologic disruptions and consequent disturbances in stream biota community structure. The objective of this study was to determine the effects of hydrologic disruption by observing fish, aquatic macroinvertebrate, stream microbiota, and fish cutaneous microbiome community structure throughout three seasons in an intermittent stream. Little Creek (LC) is a second-order intermittent stream characterized by perennial flow upstream and seasonal drying downstream. LC was separated into three reaches based on flow during dry conditions- upstream (flowing), intermediate (isolated pools), and downstream (completely dry) with six sample sites within each reach. Community data were collected during three seasons- immediately post- reconnection (December), four months post-reconnection (April), and pre-disconnection (October) of hydrology. It was hypothesized that taxonomic assemblages in all reaches would experience variation in seasonal community structure, yet the magnitude of this variation would be greatest at downstream reaches, where water fluctuations were most dramatic. All assemblages showed significant spatial variation over time and generally showed an increase in community heterogeneity from the upstream to downstream direction. Fish and stream microbiota showed increased seasonal variation in downstream and intermediate reaches compared to the upstream reach, while fish cutaneous microbiome showed consistent variation across all reaches. These results provide some evidence for the impact of intermittency on stream organism assemblages while highlighting non-uniformity in taxa responses to drying. This study shows that, although stream biota of LC may be adapted to the semi-predictable hydrologic alterations of intermittency, community structure still varies across multiple dimensions of biodiversity. In other areas with high levels of groundwater extraction, depletion in the groundwater table has caused historically perennial streams to become intermittent. This study provides a means for understanding the impacts of hydrologic disruption or augmented intermittency on aquatic organisms, which is essential for predicting the effects of drying on stream biodiversity as the demand for water increases.

ISBN: 9780438466173Subjects--Topical Terms:

517296
Molecular biology.

Impact of Water Fluctuations and Intermittency on Stream Fish, Fish Microbiome, Water Microbiota, and Invertebrate Communities.
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