Regional and Local Diversity in a Patchy Environment: Serpentine Plants in California

加州的蛇纹石土壤中有丰富的特有种植物群，其中许多是天然稀有的。本研究将检验这一假设，即在这个专门的植物群的物种多样性是由岛状的性质的蛇纹石露头，在其他因素。 我将分析整个州的蛇纹岩特有植物群的物种多样性模式，同时考虑区域尺度（县）和局部尺度（50 x 20 m地块）的多样性。 区域数据将从已公布的来源收集，并进行空间统计分析;本地数据将通过在全州24个地点进行密集的实地采样收集。 路径分析和其他植物学技术将用于确定区域物种多样性、当地物种多样性和环境变量（例如土壤化学、气候、地形和蛇纹石的空间分布）之间的关系。"

ABSTRACTSusan P. HarrisonDEB 0075369Outcrops of serpentine soil in California support a rich flora of endemicspecies, many of which are naturally rare. This study will test thehypothesis that species diversity in this specialized flora is shaped by theisland-like nature of serpentine outcrops, among other factors. I willanalyze patterns of species diversity in the serpentine endemic flora acrossthe entire state, considering diversity at both the regional scale(subcounties) and the local scale (50 x 20 m plots). The regional data willbe gathered from published sources and analyzed with spatial statistics; thelocal data will be gathered by intensive field sampling at 24 sitesdistributed around the state. Path analysis and other statisticaltechniques will be used to determine the relationships between regionalspecies diversity, local species diversity, and environmental variables(e.g. soil chemistry, climate, topography, and the spatial distribution ofserpentine)."