國立虎尾科技大學 |

Effects of Winter Hypoxia on Fish Communities in Northern Wisconsin.

紀錄類型:	書目-語言資料,手稿 : Monograph/item
正題名/作者:	Effects of Winter Hypoxia on Fish Communities in Northern Wisconsin./
作者:	Ellman, Mark James.
面頁冊數:	1 online resource (97 pages)
附註:	Source: Masters Abstracts International, Volume: 85-02.
Contained By:	Masters Abstracts International85-02.
標題:	Aquatic sciences. -
電子資源:	click for full text (PQDT)
ISBN:	9798380124270

Effects of Winter Hypoxia on Fish Communities in Northern Wisconsin.
Ellman, Mark James.

Effects of Winter Hypoxia on Fish Communities in Northern Wisconsin. - 1 online resource (97 pages)

Source: Masters Abstracts International, Volume: 85-02.

Thesis (M.S.)--University of Minnesota, 2023.

Includes bibliographical references

Hypoxia is a significant source of winter mortality for freshwater fish in northtemperate lakes and has the potential to alter fish communities. A multi-year dataset on Buckskin Lake, a shallow, productive drainage lake in northern Wisconsin with a history of winterkill, allowed the investigation of the effects of periodic winter hypoxia on fish communities. An aeration system was installed in 1984, which raised winter oxygen levels to levels sufficient for higher fish survival. In the winter of 2007-2008, the aerator system failed, causing an extensive winterkill. The lake was sampled from 2002-2005, before the aerator failure, and in 2008-2009, after the winterkill event. In addition, 16 similar lakes in the area with no winterkill history were sampled using similar methods. Using the combined datasets, two hypotheses were tested with non-metric multidimensional scaling (NMDS) and PERMANOVA analyses. We hypothesized that (1): after 18 years of aeration, the Buckskin Lake fish community from 2002-2005 would be similar to the non-winterkill lakes due to the recolonization of species from connected lakes, and (2): the fish community changed significantly in the lake due to the 2007-2008 winterkill event. The first hypothesis was not supported, as NMDS and PERMANOVA analyses showed that Buckskin Lake retained a fish community distinct from the non-winterkill lakes. Our findings were consistent with the second hypothesis: an incomplete winterkill occurred in 2007-2008 due to lack of aeration, causing changes in fish abundances, including the reduction of game fish species and centrarchids, with no notable extinctions. Together, our findings indicate that winter aeration may improve gamefish survival and allow lakes with winterkill tendency to support sport fish communities with healthy piscivore populations such as walleye and largemouth bass, which would be otherwise greatly reduced.

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

Mode of access: World Wide Web

ISBN: 9798380124270Subjects--Topical Terms:

1178821
Aquatic sciences.
Subjects--Index Terms:

Freshwater fishIndex Terms--Genre/Form:

554714
Electronic books.

Effects of Winter Hypoxia on Fish Communities in Northern Wisconsin.
LDR:03238ntm a2200397K 4500 001 1141453
005 20240315085544.5
006 m o d
007 cr mn ---uuuuu
008 250605s2023 xx obm 000 0 eng d
020 $a 9798380124270
035 $a (MiAaPQ)AAI30574088
035 $a AAI30574088
040 $a MiAaPQ $b eng $c MiAaPQ $d NTU
100 1 $a Ellman, Mark James. $3 1465228
245 1 0 $a Effects of Winter Hypoxia on Fish Communities in Northern Wisconsin.
264 0 $c 2023
300 $a 1 online resource (97 pages)
336 $a text $b txt $2 rdacontent
337 $a computer $b c $2 rdamedia
338 $a online resource $b cr $2 rdacarrier
500 $a Source: Masters Abstracts International, Volume: 85-02.
500 $a Advisor: Hrabik, Thomas R.
502 $a Thesis (M.S.)--University of Minnesota, 2023.
504 $a Includes bibliographical references
520 $a Hypoxia is a significant source of winter mortality for freshwater fish in northtemperate lakes and has the potential to alter fish communities. A multi-year dataset on Buckskin Lake, a shallow, productive drainage lake in northern Wisconsin with a history of winterkill, allowed the investigation of the effects of periodic winter hypoxia on fish communities. An aeration system was installed in 1984, which raised winter oxygen levels to levels sufficient for higher fish survival. In the winter of 2007-2008, the aerator system failed, causing an extensive winterkill. The lake was sampled from 2002-2005, before the aerator failure, and in 2008-2009, after the winterkill event. In addition, 16 similar lakes in the area with no winterkill history were sampled using similar methods. Using the combined datasets, two hypotheses were tested with non-metric multidimensional scaling (NMDS) and PERMANOVA analyses. We hypothesized that (1): after 18 years of aeration, the Buckskin Lake fish community from 2002-2005 would be similar to the non-winterkill lakes due to the recolonization of species from connected lakes, and (2): the fish community changed significantly in the lake due to the 2007-2008 winterkill event. The first hypothesis was not supported, as NMDS and PERMANOVA analyses showed that Buckskin Lake retained a fish community distinct from the non-winterkill lakes. Our findings were consistent with the second hypothesis: an incomplete winterkill occurred in 2007-2008 due to lack of aeration, causing changes in fish abundances, including the reduction of game fish species and centrarchids, with no notable extinctions. Together, our findings indicate that winter aeration may improve gamefish survival and allow lakes with winterkill tendency to support sport fish communities with healthy piscivore populations such as walleye and largemouth bass, which would be otherwise greatly reduced.
533 $a Electronic reproduction. $b Ann Arbor, Mich. : $c ProQuest, $d 2024
538 $a Mode of access: World Wide Web
650 4 $a Aquatic sciences. $3 1178821
650 4 $a Ecology. $3 575279
650 4 $a Biology. $3 599573
653 $a Freshwater fish
653 $a Drainage lake
653 $a Winterkill
653 $a Wisconsin
653 $a Winter hypoxia
655 7 $a Electronic books. $2 local $3 554714
690 $a 0792
690 $a 0329
690 $a 0306
710 2 $a ProQuest Information and Learning Co. $3 1178819
710 2 $a University of Minnesota. $b Water Resources Science. $3 1464858
773 0 $t Masters Abstracts International $g 85-02.
856 4 0 $u http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=30574088 $z click for full text (PQDT)