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Long-Term Recovery of Restored Forests Along the Sacramento River, California, USA
Long-Term Recovery of Restored Forests Along the Sacramento River, California, USA
상세정보
- 자료유형
- 학위논문 서양
- 최종처리일시
- 20260202104839
- ISBN
- 9798293860944
- DDC
- 550
- 서명/저자
- Long-Term Recovery of Restored Forests Along the Sacramento River, California, USA
- 발행사항
- [Sl] : University of California, Santa Cruz, 2025
- 발행사항
- Ann Arbor : ProQuest Dissertations & Theses, 2025
- 형태사항
- 167 p
- 주기사항
- Source: Dissertations Abstracts International, Volume: 87-03, Section: B.
- 주기사항
- Advisor: Holl, Karen D.
- 학위논문주기
- Thesis (Ph.D.)--University of California, Santa Cruz, 2025.
- 초록/해제
- 요약The classic restoration ecology model of ecosystem recovery predicts that restoring the initial conditions of a formerly degraded site will facilitate its recovery and convergence with a reference site. Few restoration studies have long-term, multi-site restored and reference forest data to evaluate habitat recovery. My dissertation focused on multi-decadal forest recovery along 100-km of the Sacramento River, California. First, I used repeat surveys to evaluate if the trajectory of vegetation structure and community composition in 11 restored forests converged with 8 reference forests and whether the trajectory differed for forest overstories and understories 9-16 years after the prior surveys. My results suggested that this system has converged with reference forest in overstory structure, based on tree and shrub stem sizes and densities, but not yet in overstory or understory composition, in part due to the invasive, shade-tolerant shrub Rubus armeniacus expanding in restored ecosystems. Second, I used remote sensing tools to quantify topographic and vegetation heterogeneity in 3,251 ha of riparian forests abutting the river that have been degraded by intensive agriculture and flood control. At a fine scale, Terrain Ruggedness Index was 76% lower in restored than remnant forests and slowly recovered with forest age. After 11 years of age, remnant forests had 13% greater Foliage Height Diversity and 23% greater overstory rugosity than restored forests, whereas by 20 years both forest types had similar levels of vegetation heterogeneity. Third, I developed a novel 3D interactive survey in Unreal Engine to evaluate participants' visual perception of terrain variability, tree clustering, tree size variability, understory complexity, and large woody debris for eight riparian forests that were simulated from field and remote sensing data. Participants were grouped into either primarily biocentric (hiker, wildlife viewer, restoration ecologist) or utilitarian (fisher, hunter, farmer) land users. Both participant groups mostly had similar preferences for an intermediate level of habitat heterogeneity, though they showed some variation for certain features. Biocentric stakeholders preferred more natural landscapes with more variable topography and tree size, greater understory complexity, and more large woody debris than utilitarian participants, who preferred landscapes that looked more cared for.
- 일반주제명
- Environmental studies
- 일반주제명
- Ecology
- 키워드
- Riparian forests
- 기타저자
- University of California, Santa Cruz Environmental Studies
- 기본자료저록
- Dissertations Abstracts International. 87-03B.
- 전자적 위치 및 접속
- 로그인 후 원문을 볼 수 있습니다.
MARC
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■007cr#unu||||||||
■020 ▼a9798293860944
■035 ▼a(MiAaPQ)AAI32172513
■040 ▼aMiAaPQ▼cMiAaPQ
■0820 ▼a550
■1001 ▼aConstantz, Brook M.▼0(orcid)0000-0002-6155-5769
■24510▼aLong-Term Recovery of Restored Forests Along the Sacramento River, California, USA
■260 ▼a[Sl]▼bUniversity of California, Santa Cruz▼c2025
■260 1▼aAnn Arbor▼bProQuest Dissertations & Theses▼c2025
■300 ▼a167 p
■500 ▼aSource: Dissertations Abstracts International, Volume: 87-03, Section: B.
■500 ▼aAdvisor: Holl, Karen D.
■5021 ▼aThesis (Ph.D.)--University of California, Santa Cruz, 2025.
■520 ▼aThe classic restoration ecology model of ecosystem recovery predicts that restoring the initial conditions of a formerly degraded site will facilitate its recovery and convergence with a reference site. Few restoration studies have long-term, multi-site restored and reference forest data to evaluate habitat recovery. My dissertation focused on multi-decadal forest recovery along 100-km of the Sacramento River, California. First, I used repeat surveys to evaluate if the trajectory of vegetation structure and community composition in 11 restored forests converged with 8 reference forests and whether the trajectory differed for forest overstories and understories 9-16 years after the prior surveys. My results suggested that this system has converged with reference forest in overstory structure, based on tree and shrub stem sizes and densities, but not yet in overstory or understory composition, in part due to the invasive, shade-tolerant shrub Rubus armeniacus expanding in restored ecosystems. Second, I used remote sensing tools to quantify topographic and vegetation heterogeneity in 3,251 ha of riparian forests abutting the river that have been degraded by intensive agriculture and flood control. At a fine scale, Terrain Ruggedness Index was 76% lower in restored than remnant forests and slowly recovered with forest age. After 11 years of age, remnant forests had 13% greater Foliage Height Diversity and 23% greater overstory rugosity than restored forests, whereas by 20 years both forest types had similar levels of vegetation heterogeneity. Third, I developed a novel 3D interactive survey in Unreal Engine to evaluate participants' visual perception of terrain variability, tree clustering, tree size variability, understory complexity, and large woody debris for eight riparian forests that were simulated from field and remote sensing data. Participants were grouped into either primarily biocentric (hiker, wildlife viewer, restoration ecologist) or utilitarian (fisher, hunter, farmer) land users. Both participant groups mostly had similar preferences for an intermediate level of habitat heterogeneity, though they showed some variation for certain features. Biocentric stakeholders preferred more natural landscapes with more variable topography and tree size, greater understory complexity, and more large woody debris than utilitarian participants, who preferred landscapes that looked more cared for.
■590 ▼aSchool code: 0036.
■650 4▼aEnvironmental studies
■650 4▼aEcology
■653 ▼aHabitat heterogeneity
■653 ▼aLandscape aesthetics
■653 ▼aRestoration ecology
■653 ▼aRestoration trajectory
■653 ▼aRiparian forests
■690 ▼a0477
■690 ▼a0329
■690 ▼a0474
■71020▼aUniversity of California, Santa Cruz▼bEnvironmental Studies.
■7730 ▼tDissertations Abstracts International▼g87-03B.
■790 ▼a0036
■791 ▼aPh.D.
■792 ▼a2025
■793 ▼aEnglish
■85640▼uhttp://www.riss.kr/pdu/ddodLink.do?id=T17359133▼nKERIS▼z이 자료의 원문은 한국교육학술정보원에서 제공합니다.
