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The Influence of Resource Variability on Aquatic Communities- [electronic resource]
The Influence of Resource Variability on Aquatic Communities - [electronic resource]
The Influence of Resource Variability on Aquatic Communities- [electronic resource]

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자료유형  
 학위논문파일 국외
최종처리일시  
20240214101505
ISBN  
9798380317740
DDC  
574.5
저자명  
Weiss, Amelia Kirsten.
서명/저자  
The Influence of Resource Variability on Aquatic Communities - [electronic resource]
발행사항  
[S.l.]: : Cornell University., 2023
발행사항  
Ann Arbor : : ProQuest Dissertations & Theses,, 2023
형태사항  
1 online resource(191 p.)
주기사항  
Source: Dissertations Abstracts International, Volume: 85-03, Section: B.
주기사항  
Advisor: Flecker, Alex;Sparks, Jed.
학위논문주기  
Thesis (Ph.D.)--Cornell University, 2023.
사용제한주기  
This item must not be sold to any third party vendors.
초록/해제  
요약Most ecosystems have permeable boundaries and are influenced by the movement of resources between surrounding environments. Since resource movements can be intermittent in space and time, variability represents a crucial control over how resource availability influences consumer ecology. Different modes of resource variation, such as the duration, type, magnitude, and frequency of resource availability, may lead to different patterns in consumer community structure. Here, I evaluate how different modes of resource variability affect consumers. In chapter 1, I use public data to examine the relationship between resource longevity and rates of molecular evolution among mussels (Mytilidae: Bathymodiolinae) and tubeworms (Siboglinidae), two clades that have diversified across deep-sea environments that persist for different lengths of time, ranging from decades to millennia. I report an inverse relationship between habitat longevity and rates of mitochondrial sequence evolution, supporting the hypothesis that resource longevity structures consumer life-history variation. Chapter 2 evaluates how imported photosynthetic and autochthonous chemosynthetic resources shape crustacean trophic structure in subterranean estuaries. I document evidence of chemosynthetic energy consumption by generalist filter-feeding crustaceans, contradicting traditional notions of caves as extreme cases of subsidy-dependent ecosystems. These findings highlight how consumer functional traits may mediate the effects of resource variability on food web organization. To further examine the consequences of resource variability, I use protist communities that inhabit the pitchers of Sarracenia purpurea to examine how the magnitude (chapter 3) and frequency (chapter 4) of resource pulses impact community organization. Large pulses led to more deterministic patterns in community structure, characterized by dominance of large, fast-moving swimming protists, while small pulses led to greater stochasticity. Resource pulse frequency mediated both taxonomic and functional community structure. High pulse frequency led to more speciose communities due to increased representation of rare taxa. Low frequency pulses led to communities dominated by large, fast-moving ciliates, while high frequency pulses led to more stochasticity and increased representation of smaller, slow-moving amoebae. Overall, these findings demonstrate that different modes of resource variability can fundamentally alter patterns and variability in community organization, improving our ability to anticipate how altered patterns of resource variation may impact communities in the future.
일반주제명  
Ecology.
일반주제명  
Evolution & development.
일반주제명  
Biology.
키워드  
Chemosynthesis
키워드  
Community structure
키워드  
Food web organization
키워드  
Molecular evolution
키워드  
Resource pulses
키워드  
Sarracenia purpurea
기타저자  
Cornell University Ecology and Evolutionary Biology
기본자료저록  
Dissertations Abstracts International. 85-03B.
기본자료저록  
Dissertation Abstract International
전자적 위치 및 접속  
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MARC

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■040    ▼aMiAaPQ▼cMiAaPQ
■0820  ▼a574.5
■1001  ▼aWeiss,  Amelia  Kirsten.▼0(orcid)0000-0002-1248-8520
■24510▼aThe  Influence  of  Resource  Variability  on  Aquatic  Communities▼h[electronic  resource]
■260    ▼a[S.l.]:▼bCornell  University.  ▼c2023
■260  1▼aAnn  Arbor  :▼bProQuest  Dissertations  &  Theses,  ▼c2023
■300    ▼a1  online  resource(191  p.)
■500    ▼aSource:  Dissertations  Abstracts  International,  Volume:  85-03,  Section:  B.
■500    ▼aAdvisor:  Flecker,  Alex;Sparks,  Jed.
■5021  ▼aThesis  (Ph.D.)--Cornell  University,  2023.
■506    ▼aThis  item  must  not  be  sold  to  any  third  party  vendors.
■520    ▼aMost  ecosystems  have  permeable  boundaries  and  are  influenced  by  the  movement  of  resources  between  surrounding  environments.  Since  resource  movements  can  be  intermittent  in  space  and  time,  variability  represents  a  crucial  control  over  how  resource  availability  influences  consumer  ecology.  Different  modes  of  resource  variation,  such  as  the  duration,  type,  magnitude,  and  frequency  of  resource  availability,  may  lead  to  different  patterns  in  consumer  community  structure.  Here,  I  evaluate  how  different  modes  of  resource  variability  affect  consumers.  In  chapter  1,  I  use  public  data  to  examine  the  relationship  between  resource  longevity  and  rates  of  molecular  evolution  among  mussels  (Mytilidae:  Bathymodiolinae)  and  tubeworms  (Siboglinidae),  two  clades  that  have  diversified  across  deep-sea  environments  that  persist  for  different  lengths  of  time,  ranging  from  decades  to  millennia.  I  report  an  inverse  relationship  between  habitat  longevity  and  rates  of  mitochondrial  sequence  evolution,  supporting  the  hypothesis  that  resource  longevity  structures  consumer  life-history  variation.  Chapter  2  evaluates  how  imported  photosynthetic  and  autochthonous  chemosynthetic  resources  shape  crustacean  trophic  structure  in  subterranean  estuaries.  I  document  evidence  of  chemosynthetic  energy  consumption  by  generalist  filter-feeding  crustaceans,  contradicting  traditional  notions  of  caves  as  extreme  cases  of  subsidy-dependent  ecosystems.  These  findings  highlight  how  consumer  functional  traits  may  mediate  the  effects  of  resource  variability  on  food  web  organization.  To  further  examine  the  consequences  of  resource  variability,  I  use  protist  communities  that  inhabit  the  pitchers  of  Sarracenia  purpurea  to  examine  how  the  magnitude  (chapter  3)  and  frequency  (chapter  4)  of  resource  pulses  impact  community  organization.  Large  pulses  led  to  more  deterministic  patterns  in  community  structure,  characterized  by  dominance  of  large,  fast-moving  swimming  protists,  while  small  pulses  led  to  greater  stochasticity.  Resource  pulse  frequency  mediated  both  taxonomic  and  functional  community  structure.  High  pulse  frequency  led  to  more  speciose  communities  due  to  increased  representation  of  rare  taxa.  Low  frequency  pulses  led  to  communities  dominated  by  large,  fast-moving  ciliates,  while  high  frequency  pulses  led  to  more  stochasticity  and  increased  representation  of  smaller,  slow-moving  amoebae.  Overall,  these  findings  demonstrate  that  different  modes  of  resource  variability  can  fundamentally  alter  patterns  and  variability  in  community  organization,  improving  our  ability  to  anticipate  how  altered  patterns  of  resource  variation  may  impact  communities  in  the  future.
■590    ▼aSchool  code:  0058.
■650  4▼aEcology.
■650  4▼aEvolution  &  development.
■650  4▼aBiology.
■653    ▼aChemosynthesis
■653    ▼aCommunity  structure
■653    ▼aFood  web  organization
■653    ▼aMolecular  evolution
■653    ▼aResource  pulses
■653    ▼aSarracenia  purpurea
■690    ▼a0329
■690    ▼a0412
■690    ▼a0306
■71020▼aCornell  University▼bEcology  and  Evolutionary  Biology.
■7730  ▼tDissertations  Abstracts  International▼g85-03B.
■773    ▼tDissertation  Abstract  International
■790    ▼a0058
■791    ▼aPh.D.
■792    ▼a2023
■793    ▼aEnglish
■85640▼uhttp://www.riss.kr/pdu/ddodLink.do?id=T16933906▼nKERIS▼z이  자료의  원문은  한국교육학술정보원에서  제공합니다.
■980    ▼a202402▼f2024

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