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Spatio-Temporal Dynamics Of Biomes In The Northwestern United States (9000 Ybp To The Present), Christopher Caleb Stump
Spatio-Temporal Dynamics Of Biomes In The Northwestern United States (9000 Ybp To The Present), Christopher Caleb Stump
Graduate Student Theses, Dissertations, & Professional Papers
The goal of this study was to quantitatively analyze and map the vegetation composition of forest, grassland, and steppe ecosystems in the northwestern United States in the present and through the last 9,000 years. The modern analysis used canonical correspondence analysis (CCA) on pollen percentages from recent sediment cores reflecting modern vegetation assemblages and climates to evaluate the amount of influence of selected environmental variables on present species distributions. The fossil analysis used non-metric multi-dimensional scaling (NMDS) on a merged database containing relative pollen percentages from the last 9000 years. A predefined list of environmental parameters and floristically and ecologically …