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

热带风暴阿尔贝托造成的大面积洪水进入乔治亚州西南部，并保持相对静止的位置，产生极端降水和大面积洪水。弗林特河流域部分地区的降雨量超过53厘米，这一流域的洪水是500年一遇的。大规模和高强度的洪水为开展洪水对长叶松（Pinus palustris）和线草（Aristida stricta）生态系统影响的研究提供了机会。研究内容包括树木的死亡和更新、河岸带内的河流地貌、线草的死亡和补充、景观尺度的地貌响应以及相对于景观位置的斑块结构。遥感技术和地面调查将用于评估干扰对这些生态系统的影响，并开始研究如何在这些受干扰的环境中恢复。这项研究很重要，因为该事件的严重性和罕见性，以及可以比较该事件的信息库。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。该项目开始了对这些重要经济生态系统中洪水和降水干扰的及时研究。?？

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. ??