서브메뉴
검색
Indirect Effects of Invasive Shrubs on Small Mammal Seed Predation and Activity
Indirect Effects of Invasive Shrubs on Small Mammal Seed Predation and Activity
상세정보
- 자료유형
- 학위논문 서양
- 최종처리일시
- 20260202104654
- ISBN
- 9798280771901
- DDC
- 574.5
- 저자명
- Fuka, Mark E.
- 서명/저자
- Indirect Effects of Invasive Shrubs on Small Mammal Seed Predation and Activity
- 발행사항
- [Sl] : The University of Wisconsin - Madison, 2025
- 발행사항
- Ann Arbor : ProQuest Dissertations & Theses, 2025
- 형태사항
- 151 p
- 주기사항
- Source: Dissertations Abstracts International, Volume: 86-12, Section: B.
- 주기사항
- Advisor: Orrock, John L.
- 학위논문주기
- Thesis (Ph.D.)--The University of Wisconsin - Madison, 2025.
- 초록/해제
- 요약Seeds play a fundamental role in plant recruitment and dispersal, and therefore, the survival, persistence, expansion, and extinction of plant populations may depend upon the fate of seeds. As such, animals that consume seeds have demonstrated the ability to modify plant communities across ecosystems. In temperate woodlands, although native trees provide crucial wildlife habitat and valuable ecosystem services, maintaining these systems hinges upon successful tree recruitment and establishment, which may be hindered by the activity of granivorous rodents. Moreover, the spread of non-native invasive woody shrubs throughout North America can modify understory structure in ways that can further exacerbate rodent activity and seed predation. Therefore, understanding how spatial and temporal aspects of habitat structure and local environmental conditions may interact to affect seed-eating animals and lead to changes in seed consumption and dispersal is vital to promoting successful restoration of temperate forests.The role of temporal variation in seed fate may be relevant in light of biological invasions, as widespread invasive woody shrubs (i.e., common buckthorn [Rhamnus cathartica]) are known to affect seed fate and are also known to exhibit leafing phenology that is different from native shrubs and could cause changes in seed predation by rodents (e.g., white-footed mice [Peromyscus leucopus]). By conducting an experiment that coupled an invasive shrub manipulation with a seasonal seed removal study, I found that both native tree seeds and R. cathartica seeds were at the greatest risk of consumption in habitats invaded by invasive shrubs regardless of the time of year. These findings help reveal the optimal window for seed survival for seed addition restoration projects following the removal of invasive shrubs by identifying both winter and spring as key times of year that seeds may be most likely to escape predation. In another experiment that used a large-scale invasive shrub manipulation across a rural-to-urban forest gradient spanning multiple seasons, I found that sites in highly urban environments had both high levels of eastern grey squirrel activity (Sciurus carolinensis) and high levels of oak acorn loss. Additionally, elevated P. leucopus activity during autumn in R. cathartica removal plots indicated the strength of resource pulses provided by seed depots. Together, the findings from these two experiments demonstrate seasonal variation in small mammal granivory and illustrate the spatial and temporal scale of seed loss linked to variability in local environmental conditions. Because the effectiveness of seed addition may be particularly reduced as forests become increasingly invaded by exotic woody shrubs that can amplify small mammal granivory, there is a growing need to develop novel, effective restoration practices focused on promoting native tree seed survival for maintaining sustainable forest regeneration. I explored a novel method of protecting seeds from granivory by conducting an experiment using capsaicin-extract coated black cherry (Prunus serotina) seeds. I found that the removal of invasive shrubs, not capsaicin coatings, reduced seed loss. During the course of the 5-month sampling period, I also found a significant reduction in the remaining capsaicin concentration found on seeds, indicating a need for longer-lasting coating techniques. In another experiment that measured both the rate of seed loss and fate of capsaicin coated red oak (Quercus rubra) acorns, I found that applying capsaicin on seed coats deterred rodent granivory, and that this deterrence was strengthened by the removal of invasive shrubs. Additionally, I observed no differences in dispersal distance between capsaicin and control acorns, indicating that capsaicin may be used to both deter granivores without hindering dispersal of Q. rubra. Together, these experiments reinforce the utility of invasive shrub removal as an effective restoration strategy as well as provide support for the use of chemical seed coatings to deter granivorous rodents.
- 일반주제명
- Ecology
- 일반주제명
- Plant sciences
- 일반주제명
- Wildlife management
- 일반주제명
- Animal sciences
- 키워드
- Invasive shrubs
- 키워드
- Seed predation
- 키워드
- Small mammals
- 기타저자
- The University of Wisconsin - Madison Integrative Biology
- 기본자료저록
- Dissertations Abstracts International. 86-12B.
- 전자적 위치 및 접속
- 로그인 후 원문을 볼 수 있습니다.
MARC
008260126s2025 us c eng d■001000017358387
■00520260202104654
■006m o d
■007cr#unu||||||||
■020 ▼a9798280771901
■035 ▼a(MiAaPQ)AAI32115635
■040 ▼aMiAaPQ▼cMiAaPQ
■0820 ▼a574.5
■1001 ▼aFuka, Mark E.
■24510▼aIndirect Effects of Invasive Shrubs on Small Mammal Seed Predation and Activity
■260 ▼a[Sl]▼bThe University of Wisconsin - Madison▼c2025
■260 1▼aAnn Arbor▼bProQuest Dissertations & Theses▼c2025
■300 ▼a151 p
■500 ▼aSource: Dissertations Abstracts International, Volume: 86-12, Section: B.
■500 ▼aAdvisor: Orrock, John L.
■5021 ▼aThesis (Ph.D.)--The University of Wisconsin - Madison, 2025.
■520 ▼aSeeds play a fundamental role in plant recruitment and dispersal, and therefore, the survival, persistence, expansion, and extinction of plant populations may depend upon the fate of seeds. As such, animals that consume seeds have demonstrated the ability to modify plant communities across ecosystems. In temperate woodlands, although native trees provide crucial wildlife habitat and valuable ecosystem services, maintaining these systems hinges upon successful tree recruitment and establishment, which may be hindered by the activity of granivorous rodents. Moreover, the spread of non-native invasive woody shrubs throughout North America can modify understory structure in ways that can further exacerbate rodent activity and seed predation. Therefore, understanding how spatial and temporal aspects of habitat structure and local environmental conditions may interact to affect seed-eating animals and lead to changes in seed consumption and dispersal is vital to promoting successful restoration of temperate forests.The role of temporal variation in seed fate may be relevant in light of biological invasions, as widespread invasive woody shrubs (i.e., common buckthorn [Rhamnus cathartica]) are known to affect seed fate and are also known to exhibit leafing phenology that is different from native shrubs and could cause changes in seed predation by rodents (e.g., white-footed mice [Peromyscus leucopus]). By conducting an experiment that coupled an invasive shrub manipulation with a seasonal seed removal study, I found that both native tree seeds and R. cathartica seeds were at the greatest risk of consumption in habitats invaded by invasive shrubs regardless of the time of year. These findings help reveal the optimal window for seed survival for seed addition restoration projects following the removal of invasive shrubs by identifying both winter and spring as key times of year that seeds may be most likely to escape predation. In another experiment that used a large-scale invasive shrub manipulation across a rural-to-urban forest gradient spanning multiple seasons, I found that sites in highly urban environments had both high levels of eastern grey squirrel activity (Sciurus carolinensis) and high levels of oak acorn loss. Additionally, elevated P. leucopus activity during autumn in R. cathartica removal plots indicated the strength of resource pulses provided by seed depots. Together, the findings from these two experiments demonstrate seasonal variation in small mammal granivory and illustrate the spatial and temporal scale of seed loss linked to variability in local environmental conditions. Because the effectiveness of seed addition may be particularly reduced as forests become increasingly invaded by exotic woody shrubs that can amplify small mammal granivory, there is a growing need to develop novel, effective restoration practices focused on promoting native tree seed survival for maintaining sustainable forest regeneration. I explored a novel method of protecting seeds from granivory by conducting an experiment using capsaicin-extract coated black cherry (Prunus serotina) seeds. I found that the removal of invasive shrubs, not capsaicin coatings, reduced seed loss. During the course of the 5-month sampling period, I also found a significant reduction in the remaining capsaicin concentration found on seeds, indicating a need for longer-lasting coating techniques. In another experiment that measured both the rate of seed loss and fate of capsaicin coated red oak (Quercus rubra) acorns, I found that applying capsaicin on seed coats deterred rodent granivory, and that this deterrence was strengthened by the removal of invasive shrubs. Additionally, I observed no differences in dispersal distance between capsaicin and control acorns, indicating that capsaicin may be used to both deter granivores without hindering dispersal of Q. rubra. Together, these experiments reinforce the utility of invasive shrub removal as an effective restoration strategy as well as provide support for the use of chemical seed coatings to deter granivorous rodents.
■590 ▼aSchool code: 0262.
■650 4▼aEcology
■650 4▼aPlant sciences
■650 4▼aWildlife management
■650 4▼aAnimal sciences
■653 ▼aInvasive shrubs
■653 ▼aRhamnus cathartica
■653 ▼aSeed predation
■653 ▼aSmall mammals
■653 ▼aPeromyscus leucopus
■690 ▼a0329
■690 ▼a0475
■690 ▼a0479
■690 ▼a0286
■71020▼aThe University of Wisconsin - Madison▼bIntegrative Biology.
■7730 ▼tDissertations Abstracts International▼g86-12B.
■790 ▼a0262
■791 ▼aPh.D.
■792 ▼a2025
■793 ▼aEnglish
■85640▼uhttp://www.riss.kr/pdu/ddodLink.do?id=T17358387▼nKERIS▼z이 자료의 원문은 한국교육학술정보원에서 제공합니다.


