Beavers as drivers of ecological dynamics

海狸作为生态动态的驱动力

基本信息

  • 批准号:
    RGPIN-2020-04223
  • 负责人:
  • 金额:
    $ 2.04万
  • 依托单位:
  • 依托单位国家:
    加拿大
  • 项目类别:
    Discovery Grants Program - Individual
  • 财政年份:
    2021
  • 资助国家:
    加拿大
  • 起止时间:
    2021-01-01 至 2022-12-31
  • 项目状态:
    已结题

项目摘要

As ecosystem engineers, beavers influence the interface between biotic and abiotic components of the environment, by changing lotic (moving) aquatic systems into lentic (still) ones. Ecosystem engineering has linkages to resilience theory, which addresses nonlinear ecosystem dynamics and tipping points relative to perturbations. Once beavers colonize an area, a temporal flux of recolonization and abandonment events presents unique opportunities to test when a system is most productive, diverse and resilient. This research program examines how the interplay between environmental variables (e.g. soils, vegetation, hydrology, climate) and beaver ecology (e.g. population dynamics, habitat alterations) affects persistence of dams and tipping points where dams fail. Theory suggests that intermediate states of disturbance are more productive, and more productive systems are more stable. While beaver activities increase biodiversity and productivity, dams do fail, leading to catastrophic flooding. In response, we need to quantify key variables in castrogenic landscapes to predict persistence of dams in associated aquatic systems. In addition, spatial and temporal variables will be identified that can inform risk management for beaver release. Moreover, the influence of active maintenance of dams, population dynamics, and related environmental variables on the probability of dam persistence will be quantified. This research will occur in a boreal highland plateau, at Riding Mountain National Park (RMNP). Field observations and natural experiments will test how colonization-abandonment cycles impact vegetation communities and persistence of dams over time relative to geomorphologic conditions. These data will aid development of flood-risk models for adjacent agricultural lands potentially affected by failure of beaver dams. Factors that best predict colonization-abandonment will be applied to predictive models that also incorporate longitudinal data sets. Another focus is the assessment of the role of reoccupation in occupancy duration and how previously occupied habitats create feedback loops affecting reoccupation and permanence. RMNP has long-term data for lodge occupancy, extensive aerial photography and remote sensing data. This research will provide insights into variables that influence persistence of dams and ecological communities resulting from engineering by beavers, and potential impacts of floods. Research outputs will aid resource managers in balancing biodiversity and flood risk. Our findings will inform reintroductions of beavers for restoration in Canada and internationally while reducing conflicts. We will provide new insights, methods and models to quantify hydrological responses to ecological interactions.This research program builds on an international research network to train highly-qualified personnel from undergraduate students to postdoctoral fellows, and prepare them to become managers, researchers, leaders and innovators.
作为生态系统工程师,海狸通过将流动的水生系统转变为静止的水生系统,影响环境中生物和非生物成分之间的界面。生态系统工程与复原力理论有联系,后者涉及非线性生态系统动态和相对于扰动的临界点。一旦海狸殖民一个地区,一个时间流的殖民化和遗弃事件提供了独特的机会,以测试当一个系统是最富有成效的,多样性和弹性。该研究项目探讨了环境变量(如土壤,植被,水文,气候)和海狸生态(如人口动态,栖息地改变)之间的相互作用如何影响水坝的持久性和水坝失败的临界点。理论表明,干扰的中间状态更有生产力,生产力更高的系统更稳定。虽然海狸的活动增加了生物多样性和生产力,但大坝确实失败,导致灾难性的洪水。作为回应,我们需要量化的关键变量在卡斯特罗景观预测相关的水生系统中的水坝的持久性。此外,空间和时间变量将被确定,可以告知海狸释放的风险管理。此外,大坝的积极维护,人口动态和相关的环境变量对大坝持久性的概率的影响将被量化。这项研究将发生在北方高原高原,骑山国家公园(RMNP)。实地观察和自然实验将测试殖民-废弃周期如何影响植被群落和水坝的持续性,并与地貌条件相关。这些数据将有助于开发洪水风险模型,用于可能受海狸坝失效影响的邻近农田。最好的预测殖民放弃的因素将被应用到预测模型,也包括纵向数据集。另一个重点是评估重新占用在占用持续时间中的作用,以及以前占用的栖息地如何产生影响重新占用和永久性的反馈循环。RMNP有长期的旅馆入住率数据、广泛的航空摄影和遥感数据。这项研究将深入了解影响河狸工程造成的水坝和生态群落持续性的变量,以及洪水的潜在影响。研究成果将帮助资源管理者平衡生物多样性和洪水风险。我们的研究结果将为海狸在加拿大和国际上的恢复提供信息,同时减少冲突。本研究项目依托国际研究网络,培养从本科生到博士后的高素质人才,使其成为管理者、研究者、领导者和创新者。

项目成果

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Hood, Glynnis其他文献

Hood, Glynnis的其他文献

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{{ truncateString('Hood, Glynnis', 18)}}的其他基金

Beavers as drivers of ecological dynamics
海狸作为生态动态的驱动力
  • 批准号:
    RGPIN-2020-04223
  • 财政年份:
    2022
  • 资助金额:
    $ 2.04万
  • 项目类别:
    Discovery Grants Program - Individual
Experiential Learning to Enhance STEM Engagement for Indigenous Youth
体验式学习可增强原住民青年对 STEM 的参与
  • 批准号:
    567268-2021
  • 财政年份:
    2021
  • 资助金额:
    $ 2.04万
  • 项目类别:
    PromoScience
Beavers as drivers of ecological dynamics
海狸作为生态动态的驱动力
  • 批准号:
    RGPIN-2020-04223
  • 财政年份:
    2020
  • 资助金额:
    $ 2.04万
  • 项目类别:
    Discovery Grants Program - Individual

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