Long-Term Studies of Disturbances as They Affect Ecological Processes in Landscapes of the Southern Appalachians

对影响南阿巴拉契亚山脉景观生态过程的干扰的长期研究

• 批准号: 9632854
• 负责人: David Coleman
• 金额: $ 600.01万
• 依托单位: University of Georgia Research Foundation Inc
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 1996
• 资助国家: 美国
• 起止时间: 1996-10-15 至 2004-09-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9632854&HistoricalAwards=false
• 关键词: Long; Term; Studies; Disturbances; They

9632854 Coleman This research will continue investigations on the extent and complexity of natural and human-caused disturbances, and how they interact with ecological processes along environmental gradients in the landscape. This work builds upon extensive long-term studies of landscape processes in the southern Appalachians and spans four levels of resolution (plot, watershed, landscape and region) in the Little Tennessee and French Broad River basins. Individual and interacting effects of disturbance and environmental heterogeneity on populations, communities, and ecological processes forms the unifying theme of this proposed LTER research. The research team will focus on three areas of inquiry: (1) characterization of disturbance and environmental heterogeneity in the southern Appalachians, (2) effects of disturbance and environmental heterogeneity on populations and communities, and (3) effects of disturbance and environmental heterogeneity on biogeochemical cycling and ecosystem processes. The project builds on extensive understanding of disturbances occurring with the Coweeta basin and continues to characterize environmental heterogeneity, maintaining continuity in the 60+ year record for some variables. As the focus expands to the southern Appalachian region, historical fire regime and socio-economic drivers of land-use change will also be considered. The effects of disturbance and environmental heterogeneity on plant and animal populations will be assessed at a range of scales and key questions will be addressed on the effects of resource variability on terrestrial and aquatic biodiversity. Using a combination of new studies and continued long-term measurements, investigators will examine the role of environmental heterogeneity and disturbance in regulating ecosystem pools and processes in streams, riparian zones, and forests. This research approach utilizes an integrated program of long-term field measurements, experiments and modeling.

9632854 Coleman这项研究将继续研究自然和人为引起的干扰的程度和复杂性，以及它们如何与景观环境梯度沿环境梯度沿着生态过程相互作用。这项工作基于对阿巴拉契亚岛南部景观过程的大量长期研究，并涵盖了小田纳西州和法国宽阔的河流盆地的四个级别的分辨率（地块，分水岭，景观和地区）。骚乱和环境异质性对人群，社区和生态过程的个人和相互作用构成了这项拟议中的研究的统一主题。研究小组将重点关注三个询问领域：（1）南部阿巴拉契亚人的干扰和环境异质性的表征，（2）干扰和环境异质性对人群和社区的影响，（3）骚乱和环境异质性对骚乱和环境异质性的影响生物地球化学循环和生态系统过程。 该项目以对Coweeta盆地发生的干扰的广泛了解为基础，并继续表征环境异质性，并在60岁以上的记录中保持连续性的某些变量。随着重点扩展到阿巴拉契亚南部地区，还将考虑历史火灾制度和土地利用变化的社会经济驱动因素。扰动和环境异质性对动植物种群的影响将在一系列尺度上进行评估，关键问题将在资源变异性对陆地和水生生物多样性的影响上解决。使用新研究和持续的长期测量的结合，研究人员将研究环境异质性和干扰在调节溪流，河岸区和森林中生态系统池和过程中的作用。这种研究方法利用了长期现场测量，实验和建模的集成程序。