Climate-change Impacts on Terrestrial Ecosystems: The Intersection of Restoration, Invasives, and Disturbance

这是一个关于管理生态系统以保护或加强关键生态系统服务的项目。它的重点是气候变化和恢复之间的交集。中心假设是，气候变化可以促进或阻碍加州草原生态系统恢复为本地多年生植物，其影响的方向取决于土壤肥力和野火的流行程度。在贾斯珀山脊十年来全球变化处理(例如，氮沉积增加、气候变暖、二氧化碳增加和降水变化)的基础上，这项研究将探索增强本地植物的优势和提高对非本地植物物种入侵的抵抗力的方法。这项研究涉及一系列以田间为基础的操控实验，以探索气候变化在促进或减缓非本地植物被本地多年生草原取代方面的作用。它还将讨论野火在这次恢复中的作用，并评估恢复和未恢复草原对入侵的敏感性，所有这些都是在广泛模拟的气候变化的背景下进行的。研究的更广泛的影响部分包括三个部分。第一部分涉及提高政府间气候变化专门委员会报告中操纵性实验的能见度并强调其政策相关性(该小组是影响、适应和脆弱性问题第二工作组的共同主席)。第二部分的基础是将研究结果转化为对生态系统管理者有用的产品和演示。第三部分在一个屡获殊荣的Jasper Ridge项目中增加了全球气候因素，该项目专注于让六年级学生参与环境研究。

This is a project on managing ecosystems to protect or enhance key ecosystem services. It focuses on the intersection between climate change and restoration. The central hypothesis is that climate change can facilitate or impede restoration of California grassland ecosystems to native perennial plants, with the direction of the effect depending on soil fertility and the prevalence of wildfire. Building on a legacy of ten years of global-change manipulations (e.g., enhanced nitrogen deposition, warming, elevated carbon dioxide and altered precipitation) at Jasper Ridge, the research will explore approaches for enhancing dominance by the native plants and increasing resistance to invasion by non-native plant species. The research involves a series of field-based manipulative experiments that will explore the role of climate change in facilitating or retarding the replacement of non-native plants with native perennial grassland. It will also address the role of wildfire in this restoration and assess the susceptibility to invasion of restored and unrestored grassland, all within the context of a wide range of simulated climate changes.The broader impacts component of the research has three parts. Part one involves enhancing the visibility and highlighting the policy relevance of manipulative experiments in the reports of the Intergovernmental Panel on Climate Change (where the PI is co-chair of Working Group 2 on impacts, adaptation, and vulnerability). Part two is based on transforming the results of the research into products and presentations designed to be useful to ecosystem managers. Part three adds a global climate component to an award-winning Jasper Ridge program focused on engaging sixth-grade students in environmental studies.