Doctoral Dissertation Research: The Occurrence of Herbaceous Alien Plant Species with Respect to Environmental Stress and Anthropogenic Influences on the Georgia Sea Islands

博士论文研究将考察人为干扰和环境胁迫对乔治亚海群岛草本植物外来物种发生的影响。障碍岛为研究这些关系提供了理想的环境，因为人类使用的强度和压力较大的栖息地的存在。植被组成和环境压力变量将在四个岛屿上根据人类改造水平、环境压力水平和栖息地类型分类的地点进行抽样。将使用析因设计和方差分析模型来检验这些效应。还将确定外来物种分布的总体描述模式。这项研究将对管理者和政府机构有用，但在理论意义上将为人类干扰和环境应激与社区侵入性的关系提供新的结果。

Rodgers III, John C. University of Georgia The doctoral dissertation research will examine the effects of anthropogenic disturbance and environmental stress on the occurrence of herbaceous alien plant species on the Georgia Sea Islands. The barrier islands provide an ideal environment for examining these relationships because of the intensity of human use and the presence of stressful habitats. Vegetation composition and environmental stress variables will be sampled in sites categorized according to human modification level, environmental stress level and habitat type on each of four islands. A factorial design and analysis of variance model will be used to test these effects. Overall descriptive patterns of alien species distribution will be identified as well. The study will be of use to managers and government agencies but in a theoretical sense will provide new results on the relationship between human disturbance and environmental stress to community invasibility.