東華大學圖書館 |

Language: English

Help

回圖書館首頁

手機版館藏查詢

Back

Switch To: Labeled | MARC Mode | ISBD

Animal-Mediated Elemental Cycling Ac...

Klemet-N'Guessan, Sandra,

Linked to FindBook

Google Book

Amazon

博客來

Animal-Mediated Elemental Cycling Across Time, Space, and Animal Functional Traits /

Record Type:	Electronic resources : Monograph/item
Title/Author:	Animal-Mediated Elemental Cycling Across Time, Space, and Animal Functional Traits // Sandra Klemet-N'Guessan.
Author:	Klemet-N'Guessan, Sandra,
Description:	1 electronic resource (315 pages)
Notes:	Source: Dissertations Abstracts International, Volume: 85-11, Section: B.
Contained By:	Dissertations Abstracts International85-11B.
Subject:	Aquatic sciences. -
Online resource:	https://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=31299169
ISBN:	9798382732060

Animal-Mediated Elemental Cycling Across Time, Space, and Animal Functional Traits /
Klemet-N'Guessan, Sandra,

Animal-Mediated Elemental Cycling Across Time, Space, and Animal Functional Traits /Sandra Klemet-N'Guessan. - 1 electronic resource (315 pages)

Source: Dissertations Abstracts International, Volume: 85-11, Section: B.

Animals are essential to freshwater biogeochemistry and productivity. Through their excretion, aquatic consumers release bioavailable nutrients and carbon that can vary with animal taxonomic rank, trophic position, and abiotic factors such as light and nutrient supply. In fresh waters, light and nutrient supply is often modulated by dissolved organic matter (DOM), a "murky" component in the water that gives it a brown color and that may indirectly affect animal nutrient and carbon excretion. Additionally, contaminants can impact animal physiology, altering metabolism and inducing stress, further affecting nutrient and contaminant excretion. The size and structure of the ecosystem, including community composition and biomass, can also impact the contribution of aquatic animals to the elemental pool. To understand these dynamics, I examined animal‐mediated elemental cycling in freshwater ecosystems across gradients of DOM concentration and composition and under contaminant exposure. I tested fish and invertebrate nitrogen, phosphorus, and DOM excretion across trophic positions during two sampling events in Lake Erie and in naturally DOM-variable streams and lakes. I also investigated the effects of chronic exposure to silver nanoparticles (AgNP) under environmentally relevant conditions on fish nutrient and silver (Ag) release. I found that aquatic animals can be a substantial nutrient contributor to the nutrient pool, particularly when their population biomass is high and ambient nutrient concentrations are low. I also detected nonlinear relationships between animal nutrient excretion and DOM characteristics that varied with taxonomic rank and trophic position and that dampened at larger ecological scales. Importantly, I identified several fish DOM excretion signatures that differed relative to ambient DOM and reported the first fish Ag excretion rates under AgNPs exposure. My results underscore the context-dependency and variability inherent in animal-mediated elemental cycling, highlighting the critical role of animals as both modifiers and conduits of nutrients, DOM, and contaminants in aquatic ecosystems.

English

ISBN: 9798382732060Subjects--Topical Terms:

3174300
Aquatic sciences.
Subjects--Index Terms:

Carbon

Animal-Mediated Elemental Cycling Across Time, Space, and Animal Functional Traits /
LDR:03656nmm a22004453i 4500 001 2429172
005 20250430093542.5
006 m o d
007 cr|nu||||||||
008 261011s2024 miu||||||m |||||||eng d
020 $a 9798382732060
035 $a (MiAaPQD)AAI31299169
035 $a AAI31299169
040 $a MiAaPQD $b eng $c MiAaPQD $e rda
100 1 $a Klemet-N'Guessan, Sandra, $e author. $3 3816863
245 1 0 $a Animal-Mediated Elemental Cycling Across Time, Space, and Animal Functional Traits / $c Sandra Klemet-N'Guessan.
264 1 $a Ann Arbor : $b ProQuest Dissertations & Theses, $c 2024
300 $a 1 electronic resource (315 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: Dissertations Abstracts International, Volume: 85-11, Section: B.
500 $a Advisors: Xenopoulos, Marguerite A. Committee members: Paterson, Michael J.; Fox, Michael G.
502 $b Ph.D. $c Trent University (Canada) $d 2024.
520 $a Animals are essential to freshwater biogeochemistry and productivity. Through their excretion, aquatic consumers release bioavailable nutrients and carbon that can vary with animal taxonomic rank, trophic position, and abiotic factors such as light and nutrient supply. In fresh waters, light and nutrient supply is often modulated by dissolved organic matter (DOM), a "murky" component in the water that gives it a brown color and that may indirectly affect animal nutrient and carbon excretion. Additionally, contaminants can impact animal physiology, altering metabolism and inducing stress, further affecting nutrient and contaminant excretion. The size and structure of the ecosystem, including community composition and biomass, can also impact the contribution of aquatic animals to the elemental pool. To understand these dynamics, I examined animal‐mediated elemental cycling in freshwater ecosystems across gradients of DOM concentration and composition and under contaminant exposure. I tested fish and invertebrate nitrogen, phosphorus, and DOM excretion across trophic positions during two sampling events in Lake Erie and in naturally DOM-variable streams and lakes. I also investigated the effects of chronic exposure to silver nanoparticles (AgNP) under environmentally relevant conditions on fish nutrient and silver (Ag) release. I found that aquatic animals can be a substantial nutrient contributor to the nutrient pool, particularly when their population biomass is high and ambient nutrient concentrations are low. I also detected nonlinear relationships between animal nutrient excretion and DOM characteristics that varied with taxonomic rank and trophic position and that dampened at larger ecological scales. Importantly, I identified several fish DOM excretion signatures that differed relative to ambient DOM and reported the first fish Ag excretion rates under AgNPs exposure. My results underscore the context-dependency and variability inherent in animal-mediated elemental cycling, highlighting the critical role of animals as both modifiers and conduits of nutrients, DOM, and contaminants in aquatic ecosystems.
546 $a English
590 $a School code: 0513
650 4 $a Aquatic sciences. $3 3174300
650 4 $a Biogeochemistry. $3 545717
650 4 $a Ecology. $3 516476
653 $a Carbon
653 $a Consumer-nutrient driven dynamics
653 $a Ecological stoichiometry
653 $a Nitrogen
653 $a Phosphorus
653 $a Silver nanoparticles
690 $a 0792
690 $a 0425
690 $a 0329
710 2 $a Trent University (Canada). $b Environmental and Life Sciences. $e degree granting institution. $3 3770473
720 1 $a Xenopoulos, Marguerite A. $e degree supervisor.
773 0 $t Dissertations Abstracts International $g 85-11B.
790 $a 0513
791 $a Ph.D.
792 $a 2024
856 4 0 $u https://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=31299169