Botany Commons^™

Natural And Anthropogenic Drivers Of Tree Evolutionary Dynamics, Brandon M. Lind

Theses and Dissertations

Species of trees inhabit diverse and heterogeneous environments, and often play important ecological roles in such communities. As a result of their vast ecological breadth, trees have become adapted to various environmental pressures. In this dissertation I examine various environmental factors that drive evolutionary dynamics in threePinusspecies in California and Nevada, USA. In chapter two, I assess the role of management influence of thinning, fire, and their interaction on fine-scale gene flow within fire-suppressed populations of Pinus lambertiana, a historically dominant and ecologically important member of mixed-conifer forests of the Sierra Nevada, California. Here, I find evidence …

A Study Of The Native Trees Of Amador County, Guy V. Towsley

University of the Pacific Theses and Dissertations

The region covered by this study reaches from the valley floor of the San Joaquin-Sacramento Valley, with an altitude of about 150 feet, to the top of the Sierra Nevada Mountains, whose peaks, in Amador County, reach to more than 9000 feet. Mokelumne Peak has an altitude of 9371 feet. The north and south distance, across the county at Ione, is 22 miles, while at Cook's Station, it is barely 5 miles. Amador County has an area of about 600 square miles.

Thus, a study of trees in this county, gives a fairly representative cross-section picture of the Sierras at …