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How Decomposition Affects the Molecular Diversity of Soil Organic Matter and Its Persistence
How Decomposition Affects the Molecular Diversity of Soil Organic Matter and Its Persistence
Detailed Information
- 자료유형
- 학위논문 서양
- 최종처리일시
- 20250211151945
- ISBN
- 9798384047957
- DDC
- 631.4
- 서명/저자
- How Decomposition Affects the Molecular Diversity of Soil Organic Matter and Its Persistence
- 발행사항
- [Sl] : Cornell University, 2024
- 발행사항
- Ann Arbor : ProQuest Dissertations & Theses, 2024
- 형태사항
- 272 p
- 주기사항
- Source: Dissertations Abstracts International, Volume: 86-03, Section: B.
- 주기사항
- Advisor: Lehmann, Christopher.
- 학위논문주기
- Thesis (Ph.D.)--Cornell University, 2024.
- 초록/해제
- 요약Organic matter is critical to how soil functions. It affects numerous biological, physical, and chemical processes in soil. It is not only a large reservoir of plant essential nutrients and minerals, but also a reservoir of organic carbon. The organic carbons compounds that make up this reservoir are highly diverse and numerous in their individual structures. My dissertation explores how the diversity of organic compounds in soil is impacted by ecosystem conditions, duration of decomposition, and microbial community structure. I use high resolution mass spectrometry to quantify dissolved organic matter molecular diversity in (i) different ecosystems, (ii) over time, and (iii) in response to variable microbial communities. To this end, I show that dissolved organic matter molecular diversity decreases over long periods of time and despite the overall decline in diversity, there are site-specific compounds that accumulate with depth in different ecosystems. Assessment of molecular diversity over shorter periods of time shows that microorganisms initially decrease the number of unique compounds in dissolved organic matter but increase the diversity of molecular properties at the same time. Finally, I conclude that the diversity of organic matter is influenced more by the metabolic potential of the decomposing microbial community rather than by differing plant litter inputs or microbial richness itself. How these changes in molecular diversity impact soil organic carbon persistence remains an important question for soil scientists to study further.
- 일반주제명
- Soil sciences
- 일반주제명
- Biogeochemistry
- 일반주제명
- Ecology
- 일반주제명
- Molecular chemistry
- 키워드
- Decomposition
- 키워드
- Organic carbon
- 기타저자
- Cornell University Soil and Crop Sciences
- 기본자료저록
- Dissertations Abstracts International. 86-03B.
- 전자적 위치 및 접속
- 로그인 후 원문을 볼 수 있습니다.
MARC
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■00520250211151945
■006m o d
■007cr#unu||||||||
■020 ▼a9798384047957
■035 ▼a(MiAaPQ)AAI31327562
■040 ▼aMiAaPQ▼cMiAaPQ
■0820 ▼a631.4
■1001 ▼aDavenport, Rachelle Elizabeth.▼0(orcid)0000-0001-5712-3472
■24510▼aHow Decomposition Affects the Molecular Diversity of Soil Organic Matter and Its Persistence
■260 ▼a[Sl]▼bCornell University▼c2024
■260 1▼aAnn Arbor▼bProQuest Dissertations & Theses▼c2024
■300 ▼a272 p
■500 ▼aSource: Dissertations Abstracts International, Volume: 86-03, Section: B.
■500 ▼aAdvisor: Lehmann, Christopher.
■5021 ▼aThesis (Ph.D.)--Cornell University, 2024.
■520 ▼aOrganic matter is critical to how soil functions. It affects numerous biological, physical, and chemical processes in soil. It is not only a large reservoir of plant essential nutrients and minerals, but also a reservoir of organic carbon. The organic carbons compounds that make up this reservoir are highly diverse and numerous in their individual structures. My dissertation explores how the diversity of organic compounds in soil is impacted by ecosystem conditions, duration of decomposition, and microbial community structure. I use high resolution mass spectrometry to quantify dissolved organic matter molecular diversity in (i) different ecosystems, (ii) over time, and (iii) in response to variable microbial communities. To this end, I show that dissolved organic matter molecular diversity decreases over long periods of time and despite the overall decline in diversity, there are site-specific compounds that accumulate with depth in different ecosystems. Assessment of molecular diversity over shorter periods of time shows that microorganisms initially decrease the number of unique compounds in dissolved organic matter but increase the diversity of molecular properties at the same time. Finally, I conclude that the diversity of organic matter is influenced more by the metabolic potential of the decomposing microbial community rather than by differing plant litter inputs or microbial richness itself. How these changes in molecular diversity impact soil organic carbon persistence remains an important question for soil scientists to study further.
■590 ▼aSchool code: 0058.
■650 4▼aSoil sciences
■650 4▼aBiogeochemistry
■650 4▼aEcology
■650 4▼aMolecular chemistry
■653 ▼aCarbon persistence
■653 ▼aMolecular diversity
■653 ▼aSoil organic matter
■653 ▼aDecomposition
■653 ▼aOrganic carbon
■690 ▼a0481
■690 ▼a0425
■690 ▼a0431
■690 ▼a0329
■71020▼aCornell University▼bSoil and Crop Sciences.
■7730 ▼tDissertations Abstracts International▼g86-03B.
■790 ▼a0058
■791 ▼aPh.D.
■792 ▼a2024
■793 ▼aEnglish
■85640▼uhttp://www.riss.kr/pdu/ddodLink.do?id=T17162204▼nKERIS▼z이 자료의 원문은 한국교육학술정보원에서 제공합니다.
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