Understanding the feedbacks between canopy structure and hydrologic flow paths

了解冠层结构和水文流动路径之间的反馈

• 批准号: RGPIN-2018-06766
• 负责人: Pypker, Thomas
• 金额: $ 1.82万
• 依托单位: Thompson Rivers University
• 依托单位国家: 加拿大
• 项目类别: Discovery Grants Program - Individual
• 财政年份: 2022
• 资助国家: 加拿大
• 起止时间: 2022-01-01 至 2023-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=761305
• 关键词: Understanding; feedbacks; between; canopy; structure

Vegetation canopies directly influence the quantity and quality of water reaching the forest floor. Past research in forests have clearly demonstrated a link between tree canopy structure and the flow paths of water to the soil surface. However, less work has focused on the feedbacks between different vegetation canopies (trees, shrubs and grasses), epiphytes and hydrology. Different plant species alter both the quantity and quality of water, thereby altering the spatial distribution of water and nutrients in the canopy and soil. The changing hydrology will then impact the distribution of epiphytes and soil microorganisms. This may result in a feedback that alters the spatial distribution of species in the canopy and belowground, which subsequently alters the canopy hydrology.The next 5 years will lay the groundwork for investigating the interaction between vegetation canopy structure and hydrology, by focusing on the following objectives: 1. Assess how water movement through the plant canopy and soil changes with changing vegetation;2. Quantify the impact of the vegetation canopy on the biogeochemistry of throughfall and the feedback between the spatial distribution of organisms in the canopy and belowground and hydrology; and3. Quantify how snow pack distribution and melt vary under different vegetation types.For many years the hydrologic flow paths in vegetation canopies and soil has been treated as a black box. My research will shed some light into the black box by providing new insights into how canopy structure affects hydrologic flow paths. In addition, my research will allow for a deeper understanding of the feedbacks between organisms in the canopy/soil and canopy structure. This will allow for improved understanding of how management activities that alter canopy structure and biology will affect the hydrology of the system.My long-term goal is to improve our understanding of how vegetation alters, and is altered by, the path of water through the atmosphere-plant-soil continuum. Future research will focus on the impact of land management on canopy hydrology and the subsequent shift in hydrologic flow paths to and from the soil. By better understanding the link between canopy structure and hydrology, we can better predict the impact of changing vegetation types on the hydrology of an ecosystem at both small (plot) and large scales (watershed). In turn, this will help enlighten our understanding of the link between the spatial distribution of vegetation communities and hydrologic flow paths.My research at Thompson Rivers University (TRU) will train both graduate and undergraduate students. I strongly believe the role of the supervisor is to educate students in ethical and sound science, data analysis/writing, and to mentor the students towards success in their chosen careers. Over the next 5 years, I will focus on training 5-6 undergraduate, 2 MSc and 3 PhD students.

植被冠层直接影响到达森林地面的水量和水质。过去对森林的研究已经清楚地表明了树冠结构与水流向土壤表面的路径之间的联系。然而，较少的工作集中在不同的植被冠层（树木，灌木和草），附生植物和水文之间的反馈。不同的植物种类改变了水的数量和质量，从而改变了冠层和土壤中水分和养分的空间分布。水文变化将影响附生植物和土壤微生物的分布。这可能会导致一个反馈，改变物种的空间分布在冠层和地下，从而改变冠层水文。未来5年将奠定基础，调查植被冠层结构和水文之间的相互作用，重点是以下目标：1。评估水分在植物冠层和土壤中的流动如何随着植被的变化而变化;2.定量分析植被冠层对穿透雨生态地球化学的影响，以及生物在冠层和地下的空间分布与水文之间的反馈关系;多年来，植被冠层和土壤中的水文流动路径一直被视为一个黑箱。我的研究将通过提供关于冠层结构如何影响水文流动路径的新见解来揭示黑匣子。此外，我的研究将允许更深入地了解冠层/土壤和冠层结构中的生物之间的反馈。这将使我们更好地了解管理活动，改变冠层结构和生物将影响系统的水文。我的长期目标是提高我们的理解，植被如何改变，并改变了，水的路径通过大气-植物-土壤连续体。未来的研究将集中在土地管理对冠层水文的影响和随后的水文流动路径的变化和从土壤。通过更好地了解冠层结构和水文之间的联系，我们可以更好地预测在小尺度（地块）和大尺度（流域）的生态系统的水文植被类型的变化的影响。反过来，这将有助于启发我们对植被群落的空间分布和水文流动路径之间的联系的理解。我在汤普森河流大学（TRU）的研究将培养研究生和本科生。我坚信导师的作用是教育学生道德和健全的科学，数据分析/写作，并指导学生在他们选择的职业生涯中取得成功。在未来5年，我将重点培养5-6名本科生，2名硕士和3名博士生。