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Effects of Experimental Whole-Reach ...

Rogers, Phoenix Adonis,

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Effects of Experimental Whole-Reach Warming on the Structure and Function of a Forest Stream Macroinvertebrate Community /

Record Type:	Electronic resources : Monograph/item
Title/Author:	Effects of Experimental Whole-Reach Warming on the Structure and Function of a Forest Stream Macroinvertebrate Community // Phoenix Adonis Rogers.
Author:	Rogers, Phoenix Adonis,
Description:	1 electronic resource (217 pages)
Notes:	Source: Dissertations Abstracts International, Volume: 86-03, Section: B.
Contained By:	Dissertations Abstracts International86-03B.
Subject:	Aquatic sciences. -
Online resource:	https://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=31298519
ISBN:	9798384071570

Effects of Experimental Whole-Reach Warming on the Structure and Function of a Forest Stream Macroinvertebrate Community /
Rogers, Phoenix Adonis,

Effects of Experimental Whole-Reach Warming on the Structure and Function of a Forest Stream Macroinvertebrate Community /Phoenix Adonis Rogers. - 1 electronic resource (217 pages)

Source: Dissertations Abstracts International, Volume: 86-03, Section: B.

Forest stream ecosystems are globally widespread and serve as crucial sites for the processing and transfer of terrestrial organic carbon. As global temperatures continue to rise, understanding the ramifications of warming for these ecosystems and their communities becomes increasingly urgent. Leveraging the metabolic theory of ecology, I formulated predictions regarding the response of macroinvertebrate community composition, secondary production, and material flow to elevated water temperatures. I predicted shifts in community composition driven by species-specific thermal preferences, alongside anticipated decreases in total biomass and increases in biomass turnover (P:B), ultimately resulting in net-neutral effects on production. Furthermore, these changes could differentially affect functional feeding groups, thereby altering the flow of materials. To test these hypotheses, I subjected a ~130-m reach of a forest stream at Coweeta Hydrologic Laboratory (North Carolina, USA) to a 2.1°C temperature increase for a duration of 30 months, comparing findings with data from a pre-warming year and from a simultaneously sampled reference stream. My analyses revealed significant alterations in community composition in terms of both abundance and biomass, albeit driven by relatively subtle shifts in individual taxa. While raw data detected no changes in total abundance or biomass, modeling the production estimates revealed that the warming treatment induced a reduction in mean body size, precipitating increases in P:B and reductions in biomass that resulted in no change in production. These changes manifested in a rearrangement of flows and trend towards increased flows, with unique responses across functional feeding groups. Overall, I demonstrated the vulnerability of macroinvertebrate communities in forest streams to relatively minor increases in mean annual temperature over a relatively short period. Warming altered the composition of the community as well as the role of taxa and functional feeding groups within the stream ecosystem, with potentially implications for carbon processing within the ecosystem.

English

ISBN: 9798384071570Subjects--Topical Terms:

3174300
Aquatic sciences.
Subjects--Index Terms:

Food webs

Effects of Experimental Whole-Reach Warming on the Structure and Function of a Forest Stream Macroinvertebrate Community /
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520 $a Forest stream ecosystems are globally widespread and serve as crucial sites for the processing and transfer of terrestrial organic carbon. As global temperatures continue to rise, understanding the ramifications of warming for these ecosystems and their communities becomes increasingly urgent. Leveraging the metabolic theory of ecology, I formulated predictions regarding the response of macroinvertebrate community composition, secondary production, and material flow to elevated water temperatures. I predicted shifts in community composition driven by species-specific thermal preferences, alongside anticipated decreases in total biomass and increases in biomass turnover (P:B), ultimately resulting in net-neutral effects on production. Furthermore, these changes could differentially affect functional feeding groups, thereby altering the flow of materials. To test these hypotheses, I subjected a ~130-m reach of a forest stream at Coweeta Hydrologic Laboratory (North Carolina, USA) to a 2.1°C temperature increase for a duration of 30 months, comparing findings with data from a pre-warming year and from a simultaneously sampled reference stream. My analyses revealed significant alterations in community composition in terms of both abundance and biomass, albeit driven by relatively subtle shifts in individual taxa. While raw data detected no changes in total abundance or biomass, modeling the production estimates revealed that the warming treatment induced a reduction in mean body size, precipitating increases in P:B and reductions in biomass that resulted in no change in production. These changes manifested in a rearrangement of flows and trend towards increased flows, with unique responses across functional feeding groups. Overall, I demonstrated the vulnerability of macroinvertebrate communities in forest streams to relatively minor increases in mean annual temperature over a relatively short period. Warming altered the composition of the community as well as the role of taxa and functional feeding groups within the stream ecosystem, with potentially implications for carbon processing within the ecosystem.
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650 4 $a Ecology. $3 516476
650 4 $a Biology. $3 522710
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653 $a Food webs
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653 $a Material-flow
653 $a Secondary production
653 $a Warming
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710 2 $a The University of Alabama. $b Biological Sciences. $e degree granting institution. $3 3816803
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