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From Climate Trends to Krill Habitat: Modeling the Physical and Biological Drivers of Antarctic Ecosystem Change
From Climate Trends to Krill Habitat: Modeling the Physical and Biological Drivers of Antarctic Ecosystem Change
상세정보
- 자료유형
- 학위논문 서양
- 최종처리일시
- 20260202103124
- ISBN
- 9798315730491
- DDC
- 577
- 서명/저자
- From Climate Trends to Krill Habitat: Modeling the Physical and Biological Drivers of Antarctic Ecosystem Change
- 발행사항
- [Sl] : University of Colorado at Boulder, 2025
- 발행사항
- Ann Arbor : ProQuest Dissertations & Theses, 2025
- 형태사항
- 205 p
- 주기사항
- Source: Dissertations Abstracts International, Volume: 86-11, Section: B.
- 주기사항
- Advisor: Brook, Cassandra.
- 학위논문주기
- Thesis (Ph.D.)--University of Colorado at Boulder, 2025.
- 초록/해제
- 요약The Antarctic sea ice zone is a dynamic and rapidly changing system, where physical and biological processes shape ecosystem structure and function. Antarctic krill (Euphausia superba) are a key species in Southern Ocean ecosystems, tightly linked to the physical environment through sea ice, ocean circulation, and primary production dynamics. Using three interdisciplinary modeling approaches, this work traces the interactions between large-scale climate and sea ice dynamics to their ecological impacts on krill habitat use. First, Earth System Model simulations indicate that ongoing sea ice loss will fundamentally alter net primary productivity, with polynyas and marginal ice zones remaining crucial productivity hotspots. Second, a qualitative network model highlights regional differences in autumn productivity and sea ice cover that affect larval krill overwinter survival under future climate scenarios. The model also suggests that sea ice terraces may serve as predator refuges, an emerging hypothesis requiring further investigation. Third, integrating the descent-ascent cycle of early-stage larval krill into a regional ocean modeling system reveals how physical and biological processes shape transport pathways and retention in nursery grounds. Results suggest that connectivity between spawning and nursery areas is influenced by biological variability, particularly in early life history traits. This dissertation offers complementary insights into climate variability, sea ice dynamics, and krill ecology, providing a multi-faceted perspective on how the Antarctic marine ecosystem responds to environmental change. By linking climate-driven shifts in sea ice and ocean circulation to krill habitat use, population connectivity, and recruitment processes, these findings advance climate-informed ecosystem modeling and support adaptive management strategies. More broadly, this research highlights the necessity of interdisciplinary approaches for forecasting the future of Antarctic ecosystems in a rapidly changing climate.
- 일반주제명
- Environmental science
- 일반주제명
- Environmental studies
- 일반주제명
- Ecology
- 일반주제명
- Climate change
- 키워드
- Antarctic krill
- 키워드
- CCAMLR
- 키워드
- Southern ocean
- 기타저자
- University of Colorado at Boulder Environmental Studies
- 기본자료저록
- Dissertations Abstracts International. 86-11B.
- 전자적 위치 및 접속
- 로그인 후 원문을 볼 수 있습니다.
MARC
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■00520260202103124
■006m o d
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■020 ▼a9798315730491
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■040 ▼aMiAaPQ▼cMiAaPQ
■0820 ▼a577
■1001 ▼aSylvester, Zephyr Tompkins.▼0(orcid)0000-0002-2057-3741
■24510▼aFrom Climate Trends to Krill Habitat: Modeling the Physical and Biological Drivers of Antarctic Ecosystem Change
■260 ▼a[Sl]▼bUniversity of Colorado at Boulder▼c2025
■260 1▼aAnn Arbor▼bProQuest Dissertations & Theses▼c2025
■300 ▼a205 p
■500 ▼aSource: Dissertations Abstracts International, Volume: 86-11, Section: B.
■500 ▼aAdvisor: Brook, Cassandra.
■5021 ▼aThesis (Ph.D.)--University of Colorado at Boulder, 2025.
■520 ▼aThe Antarctic sea ice zone is a dynamic and rapidly changing system, where physical and biological processes shape ecosystem structure and function. Antarctic krill (Euphausia superba) are a key species in Southern Ocean ecosystems, tightly linked to the physical environment through sea ice, ocean circulation, and primary production dynamics. Using three interdisciplinary modeling approaches, this work traces the interactions between large-scale climate and sea ice dynamics to their ecological impacts on krill habitat use. First, Earth System Model simulations indicate that ongoing sea ice loss will fundamentally alter net primary productivity, with polynyas and marginal ice zones remaining crucial productivity hotspots. Second, a qualitative network model highlights regional differences in autumn productivity and sea ice cover that affect larval krill overwinter survival under future climate scenarios. The model also suggests that sea ice terraces may serve as predator refuges, an emerging hypothesis requiring further investigation. Third, integrating the descent-ascent cycle of early-stage larval krill into a regional ocean modeling system reveals how physical and biological processes shape transport pathways and retention in nursery grounds. Results suggest that connectivity between spawning and nursery areas is influenced by biological variability, particularly in early life history traits. This dissertation offers complementary insights into climate variability, sea ice dynamics, and krill ecology, providing a multi-faceted perspective on how the Antarctic marine ecosystem responds to environmental change. By linking climate-driven shifts in sea ice and ocean circulation to krill habitat use, population connectivity, and recruitment processes, these findings advance climate-informed ecosystem modeling and support adaptive management strategies. More broadly, this research highlights the necessity of interdisciplinary approaches for forecasting the future of Antarctic ecosystems in a rapidly changing climate.
■590 ▼aSchool code: 0051.
■650 4▼aEnvironmental science
■650 4▼aEnvironmental studies
■650 4▼aEcology
■650 4▼aClimate change
■653 ▼aAntarctic krill
■653 ▼aCCAMLR
■653 ▼aEarth system modeling
■653 ▼aQualitative network model
■653 ▼aRegional ocean model
■653 ▼aSouthern ocean
■690 ▼a0768
■690 ▼a0477
■690 ▼a0404
■690 ▼a0329
■71020▼aUniversity of Colorado at Boulder▼bEnvironmental Studies.
■7730 ▼tDissertations Abstracts International▼g86-11B.
■790 ▼a0051
■791 ▼aPh.D.
■792 ▼a2025
■793 ▼aEnglish
■85640▼uhttp://www.riss.kr/pdu/ddodLink.do?id=T17357059▼nKERIS▼z이 자료의 원문은 한국교육학술정보원에서 제공합니다.
