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Coral Reef Arks: Molecular Mechanisms Underlying the Demise and Recovery of Coral Reef Ecosystems
Coral Reef Arks: Molecular Mechanisms Underlying the Demise and Recovery of Coral Reef Eco...
Coral Reef Arks: Molecular Mechanisms Underlying the Demise and Recovery of Coral Reef Ecosystems

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자료유형  
 학위논문 서양
최종처리일시  
20250211151001
ISBN  
9798383125663
DDC  
576
저자명  
Baer, Jason Lajos.
서명/저자  
Coral Reef Arks: Molecular Mechanisms Underlying the Demise and Recovery of Coral Reef Ecosystems
발행사항  
[Sl] : University of California, San Diego, 2024
발행사항  
Ann Arbor : ProQuest Dissertations & Theses, 2024
형태사항  
357 p
주기사항  
Source: Dissertations Abstracts International, Volume: 85-12, Section: B.
주기사항  
Advisor: Rohwer, Forest L.
학위논문주기  
Thesis (Ph.D.)--University of California, San Diego, 2024.
초록/해제  
요약Viruses and microbes are foundational to the healthy functioning of coral reef ecosystems. However, dysregulation among viral and microbial communities owing to global and local pressures is driving widespread coral reef collapse. The objective of this dissertation was to investigate the drivers of this ecosystem degradation process, termed microbialization, on coral reefs and to identify mechanisms associated with ecosystem recovery from microbialized states.To begin the dissertation, I review the biochemistry underlying coral reef function and describe how ecosystem energy is differentially stored in predominantly the macroorganisms on healthy coral reefs versus the microbes on degraded coral reefs as a result of positive feedback loops. In this review, I develop hypotheses concerning how microbes, organic matter, and oxygen interact to drive shifts to microbialized states and propose a tool to manipulate reef biochemistry to counter microbialization. To begin testing these hypotheses, I build midwater mesocosm tools called Coral Arks, develop protocols for designing, deploying, and monitoring them in situ, and demonstrate their structural integrity in the marine environment. Next, I use Coral Arks in a long-term field experiment, demonstrating that microbial ecology, water quality, and biogeochemistry are improved on Arks relative to seafloor sites at the same depth. Lower microbialization on the Arks enhanced survival and growth of transplanted corals and recruited diverse assemblages of reef organisms, including fish and benthic invertebrates. These findings highlight the role of microbes in shaping the coral reef abiotic environment and suggest microbialization can be countered by reducing organic matter inputs, enhancing dissolved oxygen, and reinstating viral predatory control over microbes. Lastly, I discuss the future of coral reef restoration, identify explicit goals for reinstating reef ecosystem services, and through a literature review, summarize potential interventions for manipulating coral reefs. Using this information, I propose a restoration framework based in control theory that uses Coral Arks as experimental platforms for identifying effective restoration interventions and scaling these interventions to a natural reef.
일반주제명  
Microbiology
일반주제명  
Biogeochemistry
일반주제명  
Ocean engineering
일반주제명  
Ecology
일반주제명  
Biology
키워드  
Coral reef
키워드  
Deoxygenation
키워드  
Microbial ecology
키워드  
Microbialization
키워드  
Restoration
기타저자  
University of California, San Diego Biology (Joint Doctoral with SDSU)
기본자료저록  
Dissertations Abstracts International. 85-12B.
전자적 위치 및 접속  
로그인 후 원문을 볼 수 있습니다.

MARC

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■035    ▼a(MiAaPQ)AAI30993933
■040    ▼aMiAaPQ▼cMiAaPQ
■0820  ▼a576
■1001  ▼aBaer,  Jason  Lajos.
■24510▼aCoral  Reef  Arks:  Molecular  Mechanisms  Underlying  the  Demise  and  Recovery  of  Coral  Reef  Ecosystems
■260    ▼a[Sl]▼bUniversity  of  California,  San  Diego▼c2024
■260  1▼aAnn  Arbor▼bProQuest  Dissertations  &  Theses▼c2024
■300    ▼a357  p
■500    ▼aSource:  Dissertations  Abstracts  International,  Volume:  85-12,  Section:  B.
■500    ▼aAdvisor:  Rohwer,  Forest  L.
■5021  ▼aThesis  (Ph.D.)--University  of  California,  San  Diego,  2024.
■520    ▼aViruses  and  microbes  are  foundational  to  the  healthy  functioning  of  coral  reef  ecosystems.  However,  dysregulation  among  viral  and  microbial  communities  owing  to  global  and  local  pressures  is  driving  widespread  coral  reef  collapse.  The  objective  of  this  dissertation  was  to  investigate  the  drivers  of  this  ecosystem  degradation  process,  termed  microbialization,  on  coral  reefs  and  to  identify  mechanisms  associated  with  ecosystem  recovery  from  microbialized  states.To  begin  the  dissertation,  I  review  the  biochemistry  underlying  coral  reef  function  and  describe  how  ecosystem  energy  is  differentially  stored  in  predominantly  the  macroorganisms  on  healthy  coral  reefs  versus  the  microbes  on  degraded  coral  reefs  as  a  result  of  positive  feedback  loops.  In  this  review,  I  develop  hypotheses  concerning  how  microbes,  organic  matter,  and  oxygen  interact  to  drive  shifts  to  microbialized  states  and  propose  a  tool  to  manipulate  reef  biochemistry  to  counter  microbialization.  To  begin  testing  these  hypotheses,  I  build  midwater  mesocosm  tools  called  Coral  Arks,  develop  protocols  for  designing,  deploying,  and  monitoring  them  in  situ,  and  demonstrate  their  structural  integrity  in  the  marine  environment.  Next,  I  use  Coral  Arks  in  a  long-term  field  experiment,  demonstrating  that  microbial  ecology,  water  quality,  and  biogeochemistry  are  improved  on  Arks  relative  to  seafloor  sites  at  the  same  depth.  Lower  microbialization  on  the  Arks  enhanced  survival  and  growth  of  transplanted  corals  and  recruited  diverse  assemblages  of  reef  organisms,  including  fish  and  benthic  invertebrates.  These  findings  highlight  the  role  of  microbes  in  shaping  the  coral  reef  abiotic  environment  and  suggest  microbialization  can  be  countered  by  reducing  organic  matter  inputs,  enhancing  dissolved  oxygen,  and  reinstating  viral  predatory  control  over  microbes.  Lastly,  I  discuss  the  future  of  coral  reef  restoration,  identify  explicit  goals  for  reinstating  reef  ecosystem  services,  and  through  a  literature  review,  summarize  potential  interventions  for  manipulating  coral  reefs.  Using  this  information,  I  propose  a  restoration  framework  based  in  control  theory  that  uses  Coral  Arks  as  experimental  platforms  for  identifying  effective  restoration  interventions  and  scaling  these  interventions  to  a  natural  reef.
■590    ▼aSchool  code:  0033.
■650  4▼aMicrobiology
■650  4▼aBiogeochemistry
■650  4▼aOcean  engineering
■650  4▼aEcology
■650  4▼aBiology
■653    ▼aCoral  reef
■653    ▼aDeoxygenation
■653    ▼aMicrobial  ecology
■653    ▼aMicrobialization
■653    ▼aRestoration
■690    ▼a0410
■690    ▼a0425
■690    ▼a0547
■690    ▼a0306
■690    ▼a0329
■71020▼aUniversity  of  California,  San  Diego▼bBiology  (Joint  Doctoral  with  SDSU).
■7730  ▼tDissertations  Abstracts  International▼g85-12B.
■790    ▼a0033
■791    ▼aPh.D.
■792    ▼a2024
■793    ▼aEnglish
■85640▼uhttp://www.riss.kr/pdu/ddodLink.do?id=T17160343▼nKERIS▼z이  자료의  원문은  한국교육학술정보원에서  제공합니다.

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