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Disentangling the Ecological Role of Gizzard Shad in Kansas Small Impoundment Food Webs: Changes in Limnology, Fish Communities, and Predator Diets after Rotenone Manipulation = = Desentranar el papel ecologico del gizzard shad en las redes alimentarias de embalses pequenos de Kansas: cambios en limnologia, comunidades de peces y dietas de depredadores despues de manipulacion con rotenona.

Record Type:	Electronic resources : Monograph/item
Title/Author:	Disentangling the Ecological Role of Gizzard Shad in Kansas Small Impoundment Food Webs: Changes in Limnology, Fish Communities, and Predator Diets after Rotenone Manipulation =/
Reminder of title:	Desentranar el papel ecologico del gizzard shad en las redes alimentarias de embalses pequenos de Kansas: cambios en limnologia, comunidades de peces y dietas de depredadores despues de manipulacion con rotenona.
Author:	Renner, Elizabeth Anne.
Published:	Ann Arbor : ProQuest Dissertations & Theses, : 2022,
Description:	146 p.
Notes:	Source: Dissertations Abstracts International, Volume: 83-12, Section: B.
Contained By:	Dissertations Abstracts International83-12B.
Subject:	Limnology. -
Online resource:	http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=29060162
ISBN:	9798802747940

Disentangling the Ecological Role of Gizzard Shad in Kansas Small Impoundment Food Webs: Changes in Limnology, Fish Communities, and Predator Diets after Rotenone Manipulation = = Desentranar el papel ecologico del gizzard shad en las redes alimentarias de embalses pequenos de Kansas: cambios en limnologia, comunidades de peces y dietas de depredadores despues de manipulacion con rotenona.
Renner, Elizabeth Anne.

Disentangling the Ecological Role of Gizzard Shad in Kansas Small Impoundment Food Webs: Changes in Limnology, Fish Communities, and Predator Diets after Rotenone Manipulation =Desentranar el papel ecologico del gizzard shad en las redes alimentarias de embalses pequenos de Kansas: cambios en limnologia, comunidades de peces y dietas de depredadores despues de manipulacion con rotenona. - Ann Arbor : ProQuest Dissertations & Theses, 2022 - 146 p.

Source: Dissertations Abstracts International, Volume: 83-12, Section: B.

Thesis (Ph.D.)--Kansas State University, 2022.

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

Benthic-feeding fishes can exert direct and indirect effects on multiple trophic levels in lentic ecosystems by increasing water column nutrient concentrations, stimulating phytoplankton abundances, and increasing turbidity. One benthic-feeding fish that has been the target of selective biomanipulations is the gizzard shad (Dorosoma cepedianum), a freshwater clupeid. In reservoirs across the United States, gizzard shad often dominate fish assemblages in terms of relative abundances and proportions of total fish biomass, especially in eutrophic to hypereutrophic systems. I tested the influence of gizzard shad on lentic ecosystems by sampling key limnological parameters in 12 small impoundments across a range of gizzard shad relative abundances over four years. I hypothesized that gizzard shad relative abundance would be positively associated with algal abundance, cyanobacterial abundance, and nutrient concentrations. Higher gizzard shad relative abundances were associated with elevated total nitrogen (TN) and total phosphorus (TP) during certain months and with a general reduction in zooplankton densities. Regardless of the apparent influence of gizzard shad abundance on top-down (zooplankton) and bottom-up (nutrient) processes that might affect primary producers, I found no relationship between gizzard shad relative abundance and cyanobacteria or total phytoplankton abundance. In a manipulative experiment, I tested whether selectively eradicating gizzard shad from food webs via replicated low-dose rotenone applications could precipitate responses in abiotic and biotic variables. I collected baseline measurements of limnological and fish community parameters from eight impoundments with gizzard shad for two years (2017 and 2018) before rotenone was applied to four treatment lakes in December 2018 and then monitored food web components for two years posttreatment (2019 and 2020). TN and TP decreased in treatment impoundments relative to control impoundments following shad removal, but I found little evidence that gizzard shad removal had a substantial impact on limnological properties or fish populations. Finally, because gizzard shad are thought to be important forage for piscivorous fishes in reservoirs, I characterized the importance of gizzard shad in largemouth bass diets in 12 Kansas small impoundments and examined how piscivory varied across bass length classes, months, and a gradient of gizzard shad relative abundances, hypothesizing that largemouth bass would selectively prey upon gizzard shad compared to other forage fishes. Bass length class was a significant factor influencing the frequency of occurrence of fish (piscivory) in bass diets in our regression model, but piscivory was not associated with sampling month or gizzard shad relative abundance. Gizzard shad eradication did not alter the frequency of occurrence of fish in largemouth bass diets following rotenone treatment. Since the contribution of gizzard shad prey to bass diets was low relative to the contribution of centrarchids, cannibalism, and crayfish, selective shad removal via rotenone biomanipulation might not meaningfully alter largemouth bass diet composition. Overall, gizzard shad effects were weak and mixed, and our ability to detect responses was greatly limited by our small sample size of impoundments. My dissertation work sheds light on the ecological role of gizzard shad in small impoundments and illustrates the complexity of studying highly stochastic novel ecosystems managed for angling recreation.

ISBN: 9798802747940Subjects--Topical Terms:

545788
Limnology.
Subjects--Index Terms:

Cyanobacteria

Disentangling the Ecological Role of Gizzard Shad in Kansas Small Impoundment Food Webs: Changes in Limnology, Fish Communities, and Predator Diets after Rotenone Manipulation = = Desentranar el papel ecologico del gizzard shad en las redes alimentarias de embalses pequenos de Kansas: cambios en limnologia, comunidades de peces y dietas de depredadores despues de manipulacion con rotenona.
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245 1 0 $a Disentangling the Ecological Role of Gizzard Shad in Kansas Small Impoundment Food Webs: Changes in Limnology, Fish Communities, and Predator Diets after Rotenone Manipulation = $b Desentranar el papel ecologico del gizzard shad en las redes alimentarias de embalses pequenos de Kansas: cambios en limnologia, comunidades de peces y dietas de depredadores despues de manipulacion con rotenona.
260 1 $a Ann Arbor : $b ProQuest Dissertations & Theses, $c 2022
300 $a 146 p.
500 $a Source: Dissertations Abstracts International, Volume: 83-12, Section: B.
500 $a Includes supplementary digital materials.
500 $a Advisor: Gido, Keith B.
502 $a Thesis (Ph.D.)--Kansas State University, 2022.
506 $a This item must not be sold to any third party vendors.
520 $a Benthic-feeding fishes can exert direct and indirect effects on multiple trophic levels in lentic ecosystems by increasing water column nutrient concentrations, stimulating phytoplankton abundances, and increasing turbidity. One benthic-feeding fish that has been the target of selective biomanipulations is the gizzard shad (Dorosoma cepedianum), a freshwater clupeid. In reservoirs across the United States, gizzard shad often dominate fish assemblages in terms of relative abundances and proportions of total fish biomass, especially in eutrophic to hypereutrophic systems. I tested the influence of gizzard shad on lentic ecosystems by sampling key limnological parameters in 12 small impoundments across a range of gizzard shad relative abundances over four years. I hypothesized that gizzard shad relative abundance would be positively associated with algal abundance, cyanobacterial abundance, and nutrient concentrations. Higher gizzard shad relative abundances were associated with elevated total nitrogen (TN) and total phosphorus (TP) during certain months and with a general reduction in zooplankton densities. Regardless of the apparent influence of gizzard shad abundance on top-down (zooplankton) and bottom-up (nutrient) processes that might affect primary producers, I found no relationship between gizzard shad relative abundance and cyanobacteria or total phytoplankton abundance. In a manipulative experiment, I tested whether selectively eradicating gizzard shad from food webs via replicated low-dose rotenone applications could precipitate responses in abiotic and biotic variables. I collected baseline measurements of limnological and fish community parameters from eight impoundments with gizzard shad for two years (2017 and 2018) before rotenone was applied to four treatment lakes in December 2018 and then monitored food web components for two years posttreatment (2019 and 2020). TN and TP decreased in treatment impoundments relative to control impoundments following shad removal, but I found little evidence that gizzard shad removal had a substantial impact on limnological properties or fish populations. Finally, because gizzard shad are thought to be important forage for piscivorous fishes in reservoirs, I characterized the importance of gizzard shad in largemouth bass diets in 12 Kansas small impoundments and examined how piscivory varied across bass length classes, months, and a gradient of gizzard shad relative abundances, hypothesizing that largemouth bass would selectively prey upon gizzard shad compared to other forage fishes. Bass length class was a significant factor influencing the frequency of occurrence of fish (piscivory) in bass diets in our regression model, but piscivory was not associated with sampling month or gizzard shad relative abundance. Gizzard shad eradication did not alter the frequency of occurrence of fish in largemouth bass diets following rotenone treatment. Since the contribution of gizzard shad prey to bass diets was low relative to the contribution of centrarchids, cannibalism, and crayfish, selective shad removal via rotenone biomanipulation might not meaningfully alter largemouth bass diet composition. Overall, gizzard shad effects were weak and mixed, and our ability to detect responses was greatly limited by our small sample size of impoundments. My dissertation work sheds light on the ecological role of gizzard shad in small impoundments and illustrates the complexity of studying highly stochastic novel ecosystems managed for angling recreation.
520 $a Los peces que se alimentan del bentos pueden ejercer efectos directos e indirectos en multiples niveles troficos en los ecosistemas lenticos al aumentar las concentraciones de nutrientes en la columna de agua, estimular la abundancia de fitoplancton y aumentar la turbidez. Un pez bentonico que ha sido objeto de biomanipulaciones selectivas es el gizzard shad (Dorosoma cepedianum), un clupeido de agua dulce. En los embalses de los Estados Unidos, el gizzard shad a menudo domina los conjuntos de peces en terminos de abundancias relativas y proporciones de la biomasa total de peces, especialmente en sistemas eutroficos a hipereutroficos. Probe la influencia del gizzard shad en los ecosistemas lenticos mediante el muestreo de parametros limnologicos claves en 12 embalses pequenos en un rango de abundancias relativas del gizzard shad durante cuatro anos. Presumi que la abundancia relativa del gizzard shad se asociaria positivamente con la abundancia de algas, la abundancia de cianobacterias y las concentraciones de nutrientes. Mayores abundancias relativas de gizzard shad se asociaron con nitrogeno total (TN) y fosforo total (TP) elevados durante ciertos meses y con una reduccion general en las densidades de zooplancton. Independientemente de la influencia aparente de la abundancia de gizzard shad en los procesos de arriba hacia abajo (zooplancton) y de abajo hacia arriba (nutrientes) que podrian afectar a los productores primarios, no encontre relacion entre la abundancia relativa del gizzard shad y la abundancia total de cianobacterias o fitoplancton. En un experimento de manipulacion, probe si la erradicacion selectiva del gizzard shad de las cadenas troficas a traves de aplicaciones replicadas de rotenona en dosis bajas podria precipitar respuestas en variables bioticas y abioticas. Recopile mediciones de referencia de parametros limnologicos y de la comunidad de peces de ocho embalses con gizzard shad durante dos anos (2017 y 2018) antes de que se aplicara rotenona a cuatro lagos de tratamiento en diciembre de 2018 y luego monitoree los componentes de la red alimentaria durante dos anos posteriores al tratamiento (2019 y 2020). TN y TP disminuyeron en los embalses de tratamiento en relacion con los embalses de control despues de la extraccion del sabalo, pero encontre poca evidencia de que la extraccion del gizzard shad tuviera un impacto sustancial en las propiedades limnologicas o las poblaciones de peces. Finalmente, debido a que se cree que el gizzard shad es un forraje importante para los peces piscivoros en los embalses, caracterice la importancia del gizzard shad en las dietas de largemouth bass en 12 embalses pequenos de Kansas y examine como variaba el piscivory a traves de clases de longitud de bass, meses, y un gradiente de abundancias relativas de gizzard shad, con la hipotesis de que largemouth bass se alimentaria selectivamente del gizzard shad en comparacion con otros peces forrajeros. La clase de longitud de bass fue un factor significativo que influyo en la frecuencia de aparicion de peces (piscivory) en las dietas de largemouth bass en nuestro modelo de regresion, pero piscivory no se asocio con el mes de muestreo o la abundancia relativa del gizzard shad. La erradicacion del gizzard shad no altero la frecuencia de aparicion de peces en las dietas de largemouth bass despues del tratamiento con rotenona. Dado que la contribucion de la presa del gizzard shad a las dietas de largemouth bass fue baja en relacion con la contribucion de los centrarquidos, el canibalismo y los cangrejos de rio, la eliminacion selectiva del shad a traves de la biomanipulacion con rotenona podria no alterar significativamente la composicion de la dieta de la largemouth bass. En general, los efectos del gizzard shad fueron debiles y mixtos, y nuestra capacidad para detectar respuestas estuvo muy limitada por el pequeno tamano de nuestra muestra de embalses. Mi trabajo de tesis arroja luz sobre el papel ecologico del gizzard shad en pequenos embalses e ilustra la complejidad de estudiar ecosistemas novedosos altamente estocasticos manejados para la pesca recreativa.
590 $a School code: 0100.
650 4 $a Limnology. $3 545788
650 4 $a Ecology. $3 516476
650 4 $a Aquatic sciences. $3 3174300
653 $a Cyanobacteria
653 $a Food web
653 $a Gizzard shad
653 $a Rotenone
653 $a Small impoundment
653 $a Zooplankton
690 $a 0793
690 $a 0329
690 $a 0792
710 2 $a Kansas State University. $b Department of Biology. $3 3180692
773 0 $t Dissertations Abstracts International $g 83-12B.
790 $a 0100
791 $a Ph.D.
792 $a 2022
793 $a English
856 4 0 $u http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=29060162