Constructing a Toolbox of Geochemical Indicators of Community Composition Shifts in Coral Reef Ecosystems Under Stress
Thesis (Ph.D.)--University of Washington, 2020 Modern coral reef ecosystems house 25% of the planet’s entire marine biodiversity in ~ 0.1% of the surface area cover of the ocean and provide numerous ecosystem services for human populations. Unfortunately, these marine rainforests are known to be in...
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ftunivwashington:oai:digital.lib.washington.edu:1773/46868 2023-05-15T17:51:58+02:00 Constructing a Toolbox of Geochemical Indicators of Community Composition Shifts in Coral Reef Ecosystems Under Stress Bolden, Isaiah Wesley Gagnon, Alexander C 2020 application/pdf http://hdl.handle.net/1773/46868 en_US eng Supplemental Updates (April 2019).xlsx; spreadsheet; Supplementary Materials and Full Dataset for Chapter 2. Bolden_washington_0250E_22476.pdf http://hdl.handle.net/1773/46868 none Biogeochemical Cycling Carbonate Chemistry Coral Reefs Sr/Ca Ratio Stable Carbon Isotopes Trace Metals Chemical oceanography Oceanography Thesis 2020 ftunivwashington 2023-03-12T19:00:43Z Thesis (Ph.D.)--University of Washington, 2020 Modern coral reef ecosystems house 25% of the planet’s entire marine biodiversity in ~ 0.1% of the surface area cover of the ocean and provide numerous ecosystem services for human populations. Unfortunately, these marine rainforests are known to be in a global state of decline, largely due to the impacts of sea-surface warming, ocean acidification, pollution, disease, and other direct human impacts. Numerous studies have proposed that as these stressors increase in reef environments, a pronounced shift from precipitation to dissolution of calcium carbonate (CaCO3) substrates will induce the collapse of habitat-forming coral structures and lead to dominance of macroalgae. Together, these changes lend themselves to a decline in the overall biodiversity of marine organisms hosted in today’s reef ecosystems in addition to major losses to global fisheries,erosion of coastal protection, and dissolution of the foundations of many tropical islands. As a means to improve future reef management and adaptation strategies, there has been a recent push for the development of new tools for monitoring the health of coral reefs under environmental stressors. My research follows a forensic geochemistry approach to understand ecological shifts within and between reef ecosystems in the age of anthropogenic climate change. Specifically, I combine discrete and continuous measurements of seawater composition in coral reef environments, mathematical modeling, and high-resolution mass spectrometry to determine the most effective geochemical proxies for changes in reef metabolism and community composition under stress. Here, I will report on (1) the limitations of exploring variability in modern reef metabolism through assumptions of canonical relationships between carbon and oxygen budgets, (2) the development of a high-precision method for detecting variability in the seawater dissolved strontium-to-calcium (Sr/Casw) ratio and its potential as an indicator of calcifier community ... Thesis Ocean acidification University of Washington, Seattle: ResearchWorks |
institution |
Open Polar |
collection |
University of Washington, Seattle: ResearchWorks |
op_collection_id |
ftunivwashington |
language |
English |
topic |
Biogeochemical Cycling Carbonate Chemistry Coral Reefs Sr/Ca Ratio Stable Carbon Isotopes Trace Metals Chemical oceanography Oceanography |
spellingShingle |
Biogeochemical Cycling Carbonate Chemistry Coral Reefs Sr/Ca Ratio Stable Carbon Isotopes Trace Metals Chemical oceanography Oceanography Bolden, Isaiah Wesley Constructing a Toolbox of Geochemical Indicators of Community Composition Shifts in Coral Reef Ecosystems Under Stress |
topic_facet |
Biogeochemical Cycling Carbonate Chemistry Coral Reefs Sr/Ca Ratio Stable Carbon Isotopes Trace Metals Chemical oceanography Oceanography |
description |
Thesis (Ph.D.)--University of Washington, 2020 Modern coral reef ecosystems house 25% of the planet’s entire marine biodiversity in ~ 0.1% of the surface area cover of the ocean and provide numerous ecosystem services for human populations. Unfortunately, these marine rainforests are known to be in a global state of decline, largely due to the impacts of sea-surface warming, ocean acidification, pollution, disease, and other direct human impacts. Numerous studies have proposed that as these stressors increase in reef environments, a pronounced shift from precipitation to dissolution of calcium carbonate (CaCO3) substrates will induce the collapse of habitat-forming coral structures and lead to dominance of macroalgae. Together, these changes lend themselves to a decline in the overall biodiversity of marine organisms hosted in today’s reef ecosystems in addition to major losses to global fisheries,erosion of coastal protection, and dissolution of the foundations of many tropical islands. As a means to improve future reef management and adaptation strategies, there has been a recent push for the development of new tools for monitoring the health of coral reefs under environmental stressors. My research follows a forensic geochemistry approach to understand ecological shifts within and between reef ecosystems in the age of anthropogenic climate change. Specifically, I combine discrete and continuous measurements of seawater composition in coral reef environments, mathematical modeling, and high-resolution mass spectrometry to determine the most effective geochemical proxies for changes in reef metabolism and community composition under stress. Here, I will report on (1) the limitations of exploring variability in modern reef metabolism through assumptions of canonical relationships between carbon and oxygen budgets, (2) the development of a high-precision method for detecting variability in the seawater dissolved strontium-to-calcium (Sr/Casw) ratio and its potential as an indicator of calcifier community ... |
author2 |
Gagnon, Alexander C |
format |
Thesis |
author |
Bolden, Isaiah Wesley |
author_facet |
Bolden, Isaiah Wesley |
author_sort |
Bolden, Isaiah Wesley |
title |
Constructing a Toolbox of Geochemical Indicators of Community Composition Shifts in Coral Reef Ecosystems Under Stress |
title_short |
Constructing a Toolbox of Geochemical Indicators of Community Composition Shifts in Coral Reef Ecosystems Under Stress |
title_full |
Constructing a Toolbox of Geochemical Indicators of Community Composition Shifts in Coral Reef Ecosystems Under Stress |
title_fullStr |
Constructing a Toolbox of Geochemical Indicators of Community Composition Shifts in Coral Reef Ecosystems Under Stress |
title_full_unstemmed |
Constructing a Toolbox of Geochemical Indicators of Community Composition Shifts in Coral Reef Ecosystems Under Stress |
title_sort |
constructing a toolbox of geochemical indicators of community composition shifts in coral reef ecosystems under stress |
publishDate |
2020 |
url |
http://hdl.handle.net/1773/46868 |
genre |
Ocean acidification |
genre_facet |
Ocean acidification |
op_relation |
Supplemental Updates (April 2019).xlsx; spreadsheet; Supplementary Materials and Full Dataset for Chapter 2. Bolden_washington_0250E_22476.pdf http://hdl.handle.net/1773/46868 |
op_rights |
none |
_version_ |
1766159260685697024 |