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Ecosystem Approaches to Fisheries Management and Restoration.

紀錄類型:	書目-語言資料,手稿 : Monograph/item
正題名/作者:	Ecosystem Approaches to Fisheries Management and Restoration./
作者:	Mrnak, Joseph Thomas.
面頁冊數:	1 online resource (187 pages)
附註:	Source: Dissertations Abstracts International, Volume: 85-10, Section: B.
Contained By:	Dissertations Abstracts International85-10B.
標題:	Aquatic sciences. -
電子資源:	click for full text (PQDT)
ISBN:	9798382215587

Ecosystem Approaches to Fisheries Management and Restoration.
Mrnak, Joseph Thomas.

Ecosystem Approaches to Fisheries Management and Restoration. - 1 online resource (187 pages)

Source: Dissertations Abstracts International, Volume: 85-10, Section: B.

Thesis (Ph.D.)--The University of Wisconsin - Madison, 2024.

Includes bibliographical references

Ecosystems are abruptly changing due to invasive species and global climate change, threatening their ability to provision ecosystem services. Aquatic ecosystem transformations may occur when the system diverges from previous food web structures, species interactions, processes, and(or) anthropogenic uses. Managing novel ecosystem structures under a single-species framework proves challenging as key ecological processes, habitats, and species interactions leading to the observed system structure may be missed or disregarded. Abruptly changing ecosystems highlight the importance of "food web thinking" or a systems approach when considering management actions. Here, I focused my research on key ecological processes, habitats, and species interactions rather than focusing on removing single stressors or supporting single species. In chapter 1, I review theoretical panarchy and "food web thinking" (i.e., ecosystem-based approaches to fisheries management) to better understand ecosystem dynamics leading to long-term invasive rainbow smelt Osmerus mordax dominance or control. I found that success of invasive rainbow smelt control and(or) eradication efforts depended on whether enough rainbow smelt were removed to void their niche space and the empty niche space was filled with desired native species from remnant populations or through stocking. In chapter 2, I apply my "food web thinking" approach in two whole-lake experiments aimed at invasive species control and native species restoration. Here, my experimental lake food webs were purposefully reconfigured to native species dominance following experimental manipulation, mitigating the invasive species driven negative effects. In chapter 3, I used a holistic ecosystem-based analysis to assess Ceded Territory of Wisconsin (CTWI) walleye Sander vitreus stability by combining ecologically sensitive production metrics with fisher harvest dynamics. I found that walleye productivity is in decline while fisher harvest is hyperstable; fishers are harvesting the same size slice (harvest) out of an ever-shrinking pie (production). I developed an ecosystem-based vulnerability to harvest index and recommend that exploitation may need to decline to maintain or increase the adaptive capacity of CTWI walleye. In chapter 4, I explored how species seasonal habitat use interacts with sampling gear biases to affect population estimation. I found that species movement is an important ecological consideration that can interact with sampling biases to affect population estimation. These studies demonstrate that our ability to manage and restore aquatic ecosystems, particularly fisheries, can be improved through a food web and ecosystem approach.

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

Mode of access: World Wide Web

ISBN: 9798382215587Subjects--Topical Terms:

1178821
Aquatic sciences.
Subjects--Index Terms:

Aquatic invasive speciesIndex Terms--Genre/Form:

554714
Electronic books.

Ecosystem Approaches to Fisheries Management and Restoration.
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