Linking ecosystem and geomorphic processes to understand the large-scale dynamics of tropical mountains mediated by landsliding

将生态系统和地貌过程联系起来，了解滑坡介导的热带山脉的大规模动态

• 批准号: 1556878
• 负责人: Carla Restrepo
• 金额: $ 49.9万
• 依托单位: University of Puerto Rico-Rio Piedras
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 2016
• 资助国家: 美国
• 起止时间: 2016-07-01 至 2024-06-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1556878&HistoricalAwards=false
• 关键词: Linking; ecosystem; geomorphic; processes; understand

Landslides are an important agent of change in mountain settings worldwide. Although the basic geological processes underlying landslides are relatively well known, increasing evidence indicates that the living components of ecosystem processes play an important, but largely understudied, role. In particular, plant root and shoot biomass - two important ecosystem attributes - are likely to influence the stability of hill slopes in complex ways. This project investigates the relationships between soil fertility, climate, ecosystem attributes, and slope stability in the Sierra de Las Minas, a mountain range in eastern Guatemala. This study area was selected because it is subject to periodic landslides and has a considerable history of previous research. The project integrates for the first time basic ecosystem concepts to better understand the evolution of landforms and landslides, suggesting that the division of vegetation biomass between roots and shoots is critically important. This is a highly interdisciplinary project that also will contribute to the engagement of women and underrepresented minorities in research and outreach, forge international collaborations, and provide for the dissemination of new knowledge that will be of interest to a wide range of stakeholders and scholars, including those interested in landform evolution, ecosystem and landscape development, carbon cycling, and sustainable management of regions subjected to landslide hazard.Building upon previous work, this project takes advantage of the diverse lithologies and contrasting climates found in the Sierra de Las Minas, to test the overall hypothesis that variation in soil fertility inherited from different lithologies influences the partitioning of biomass between roots and shoots with consequences for slope stability, soil development, and ultimately landslide regimes. Variation in climatic conditions, however, may change the magnitude and direction of the observed effects. The work is organized around three specific goals and corresponding hypotheses: 1) examine the relationship between soil fertility and vegetation attributes that influence slope stability, 2) investigate differences in soil development trajectories in landslides underlain by different parent materials, and 3) evaluate the interactions between different soil fertilities and vegetation dynamics on landslides. These goals will be developed using a combination of geographic information systems and remotely sensed data, fieldwork, tree-ring studies, biogeochemical and geochronological analyses, and modeling.

滑坡是全球山区环境变化的重要推动者。尽管滑坡的基本地质过程相对众所周知，但越来越多的证据表明，生态系统过程的生活组成部分起着重要但在很大程度上被研究的作用。 特别是，植物根和射击生物量（两个重要的生态系统属性）可能以复杂的方式影响山坡的稳定性。该项目研究了危地马拉东部山脉山脉山脉山脉山脉山脉山脉山脉山脉的土壤生育能力，气候，生态系统属性和斜率稳定之间的关系。之所以选择该研究区域，是因为它受到定期滑坡的约束，并且具有先前研究的相当历史。该项目首次整合基本生态系统概念，以更好地了解地形和滑坡的演变，这表明根和芽之间的植被生物量分裂至关重要。这是一个高度跨学科的项目，还将有助于妇女和人为不足的少数群体在研究和扩展方面的参与，锻造国际合作，并提供了新知识的传播，这将引起人们对广泛的利益相关者和学者的关注，其中包括对地面，生态系统和范围内的范围，范围内的范围，范围内的范围，范围内的范围，越来越多的范围。在先前的工作中，该项目利用了塞拉特拉斯·米纳斯（Sierra de Las Minas）中发现的多样化的岩性和对比的气候，以检验总体假设，即从不同岩性中继承的土壤肥力的变化影响了根部和芽之间生物量的分配，并影响了对坡度稳定，土壤发展，土壤发展，以及最终土地层面的后果。但是，气候条件的变化可能会改变观察到的效果的大小和方向。这项工作围绕三个特定目标和相应的假设进行组织：1）检查影响斜坡稳定性的土壤生育能力与植被属性之间的关系，2）调查在不同父母材料下覆盖的土壤滑坡中土壤发育轨迹的差异，以及3）评估不同的土壤和植被在地面上的植被动力学之间的相互作用。这些目标将使用地理信息系统和远程感知的数据，现场工作，树木研究，生物地球化学和地质学分析以及建模的组合制定。