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Articles 1 - 3 of 3
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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 …
Study On Regional Responses Of Pan-Arctic Terrestrial Ecosystems To Recent Climate Variability Using Satellite Remote Sensing, Ke Zhang
Graduate Student Theses, Dissertations, & Professional Papers
I applied a satellite remote sensing based production efficiency model (PEM) using an integrated AVHRR and MODIS FPAR/LAI time series with a regionally corrected NCEP/NCAR reanalysis surface meteorology and NASA/GEWEX shortwave solar radiation inputs to assess annual terrestrial net primary productivity (NPP) for the pan-Arctic basin and Alaska from 1983 to 2005. I developed a satellite remote sensing based evapotranspiration (ET) algorithm using GIMMS NDVI with the above meteorology inputs to assess spatial patterns and temporal trends in ET over the pan-Arctic region. I then analyzed associated changes in the regional water balance defined as the difference between precipitation (P) …
Monitoring Noxious Weeds Invasions In Riparian Areas Following Livestock Exclusion Of The Upper Big Hole River Valley: Adaptive Management Under The Candidate Conservation Agreement With Assurances Project, Ana Ingrid Pederson
Graduate Student Theses, Dissertations, & Professional Papers
As a 2008 summer intern working for the Nature Conservancy, I arrived in the Big Hole Valley and was introduced to an innovative federal land management program initiated to benefit government land managers, local ranchers, and the general public while increasing ecological integrity in the valley and recovering the fluvial Arctic grayling species. The government program offered funding assistance to local ranchers for conservation projects that would help recover the species, but the landowner had to agree to a few stipulations; among them are riparian enclosures fenced for 5 years to exclude all domestic grazing. The goal of this project …