SGER: Effects of Flooding on the Longleaf Pine-Wiregrass Ecosystem

SGER：洪水对长叶松-线草生态系统的影响

• 批准号: 9520878
• 负责人: William Michener
• 金额: $ 3.5万
• 依托单位: Ichauway, Inc.
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 1995
• 资助国家: 美国
• 起止时间: 1995-06-01 至 1997-05-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9520878&HistoricalAwards=false
• 关键词: SGER; Effects; Flooding; Longleaf; Pine

MICHENER Extensive flooding resulting from tropical storm Alberto moved into southwestern Georgia and maintained a relatively stationary position producing extreme precipitation and extensive flooding. Over 53 cm of rain were recorded in portions of the Flint River drainage basin, and flooding has been characterized as a 500-year event for this catchment. The large-scale and high-intensity floods have provided an opportunity to initiate a number of studies on the effects of flooding on longleaf pine (Pinus palustris) and wiregrass (Aristida stricta) ecosystems. Research is to be carried out on tree mortality and regeneration, stream geomorphology within riparian zones, mortality and recruitment of wiregrass, landscape-scale geomorphic responses, and patch structure relative to landscape position. Remote sensing techniques and ground-based surveys will be used to assess the impacts of disturbance on these ecosystems and to initiate studies addressing recovery in these disturbed environments. This research is important because of the severity and rarity of the event, and the information base to which this occurrence can be compared. These ecosystems have generally been viewed as susceptible to disturbance by fire, but the roles of flooding and extreme precipitation have not been researched. This project begins a timely study of flood and precipitation disturbance in these economically important ecosystems. ??

麦切纳 热带风暴阿尔贝托造成的大范围洪灾进入格鲁吉亚西南部，并保持相对稳定的位置，产生极端降水和大范围洪灾。弗林特河流域部分地区的降雨量超过53厘米，洪水被认为是该流域500年一遇的事件。大规模和高强度的洪水提供了一个机会，可以就洪水对长叶松（Pinus palustris）和牛尾草（Aristida stricta）生态系统的影响开展一些研究。将对树木死亡率和再生、河岸带内的溪流地貌、线草的死亡率和补充、植被规模的地貌反应以及相对于景观位置的斑块结构进行研究。将利用遥感技术和地面调查来评估扰动对这些生态系统的影响，并着手研究如何在这些受扰动的环境中恢复。 这项研究是重要的，因为事件的严重性和罕见性，以及这种情况可以比较的信息基础。这些生态系统通常被认为容易受到火灾的干扰，但洪水和极端降水的作用尚未得到研究。该项目开始及时研究这些具有重要经济意义的生态系统中的洪水和降水干扰。 ??