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The Influence of Resource Variability on Aquatic Communities- [electronic resource]
The Influence of Resource Variability on Aquatic Communities- [electronic resource]
상세정보
- 자료유형
- 학위논문파일 국외
- 최종처리일시
- 20240214101505
- ISBN
- 9798380317740
- DDC
- 574.5
- 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
- Resource pulses
- 기타저자
- Cornell University Ecology and Evolutionary Biology
- 기본자료저록
- Dissertations Abstracts International. 85-03B.
- 기본자료저록
- Dissertation Abstract International
- 전자적 위치 및 접속
- 로그인 후 원문을 볼 수 있습니다.
MARC
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■00520240214101505
■006m o d
■007cr#unu||||||||
■020 ▼a9798380317740
■035 ▼a(MiAaPQ)AAI30567253
■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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