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Investigating Ecosystem-Scale Responses to Changes in Lake Food Webs.

紀錄類型:	書目-電子資源 : Monograph/item
正題名/作者:	Investigating Ecosystem-Scale Responses to Changes in Lake Food Webs./
作者:	Butts, Tyler J.
面頁冊數:	1 online resource (229 pages)
附註:	Source: Dissertations Abstracts International, Volume: 84-11, Section: B.
Contained By:	Dissertations Abstracts International84-11B.
標題:	Limnology. -
電子資源:	http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=30492440click for full text (PQDT)
ISBN:	9798379531324

Investigating Ecosystem-Scale Responses to Changes in Lake Food Webs.
Butts, Tyler J.

Investigating Ecosystem-Scale Responses to Changes in Lake Food Webs. - 1 online resource (229 pages)

Source: Dissertations Abstracts International, Volume: 84-11, Section: B.

Thesis (Ph.D.)--The University of Wisconsin - Madison, 2023.

Includes bibliographical references

Aquatic ecosystems are increasingly facing ecosystem-scale disturbances that affect water quality and ecosystem services. Food webs have substantial influences on how disturbances are propagated through ecosystems and the structure of trophic interactions shapes nutrient cycling and energy flow. In my dissertation, I used food webs to improve the understanding of dynamics in disturbed ecosystems, and develop our understanding of how food webs mediate, and respond to, increasingly frequent and intense disturbances. Chapter 1 used lower food web dynamics to assess consumer nutrient cycling within a hypereutrophic reservoir, demonstrating that the lower food web has a substantial influence on early summer phosphorus availability and phytoplankton size structure. Chapter 2 quantified zooplankton and macroinvertebrate size structure as a tool to assess food web response to an incentivized harvest of common carp (Cyprinus carpio) and bigmouth buffalo (Ictiobus cyprinellus). This analysis showed that the biomanipulation did not significantly affect food web structure potentially explaining the lack of water quality response. Expanding to the whole food web, chapter 3 tested whether food web structure mediates ecosystem responses to discrete disturbance-storm-driven nutrient loading-finding greater benthic-pelagic coupling increased the resistance and resilience of algal biomass response to pulsed nutrient loading events. Chapter 4 used a bioenergetics approach to explore changes in energy flux and food web stability over 19 years in the Trout Lake pelagic food web, including an invasion by a mid-trophic level invader, Bythotrephes longimanus. This analysis highlighted how a mid-trophic level invader alters the trajectory of an ecosystem by decreasing energy flux and temporarily altering food web stability. In summary, this research has advanced our understanding of how food webs drive ecosystem function and mediate ecosystem-scale responses within aquatic ecosystems.

Electronic reproduction.
Ann Arbor, Mich. :
ProQuest,
2023

Mode of access: World Wide Web

ISBN: 9798379531324Subjects--Topical Terms:

545788
Limnology.
Subjects--Index Terms:

DisturbanceIndex Terms--Genre/Form:

542853
Electronic books.

Investigating Ecosystem-Scale Responses to Changes in Lake Food Webs.
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504 $a Includes bibliographical references
520 $a Aquatic ecosystems are increasingly facing ecosystem-scale disturbances that affect water quality and ecosystem services. Food webs have substantial influences on how disturbances are propagated through ecosystems and the structure of trophic interactions shapes nutrient cycling and energy flow. In my dissertation, I used food webs to improve the understanding of dynamics in disturbed ecosystems, and develop our understanding of how food webs mediate, and respond to, increasingly frequent and intense disturbances. Chapter 1 used lower food web dynamics to assess consumer nutrient cycling within a hypereutrophic reservoir, demonstrating that the lower food web has a substantial influence on early summer phosphorus availability and phytoplankton size structure. Chapter 2 quantified zooplankton and macroinvertebrate size structure as a tool to assess food web response to an incentivized harvest of common carp (Cyprinus carpio) and bigmouth buffalo (Ictiobus cyprinellus). This analysis showed that the biomanipulation did not significantly affect food web structure potentially explaining the lack of water quality response. Expanding to the whole food web, chapter 3 tested whether food web structure mediates ecosystem responses to discrete disturbance-storm-driven nutrient loading-finding greater benthic-pelagic coupling increased the resistance and resilience of algal biomass response to pulsed nutrient loading events. Chapter 4 used a bioenergetics approach to explore changes in energy flux and food web stability over 19 years in the Trout Lake pelagic food web, including an invasion by a mid-trophic level invader, Bythotrephes longimanus. This analysis highlighted how a mid-trophic level invader alters the trajectory of an ecosystem by decreasing energy flux and temporarily altering food web stability. In summary, this research has advanced our understanding of how food webs drive ecosystem function and mediate ecosystem-scale responses within aquatic ecosystems.
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