Date of Award
Program or Major
Master of Science
Three sets of measurements were made to determine the effects of an October 1999 whole-watershed Ca-application on the chemical and spectral properties of red spruce (Picea rubens Sarg.) foliage at the Hubbard Brook Experimental Forest. Results of our measurements showed significant differences between the Ca-treated watershed (WS1) and a nearby reference watershed (WS6). Foliar chemistry data collected in 2007 showed that concentrations of Ca, Sr, and oxalate remain higher in WS1, and the increase in oxalate is strongly linked to the level of total Ca, possibly by a Ca-oxalate crystal precipitation response. High-resolution laboratory spectral data measured from 400-2500 nm show a pan-spectral increase in reflectance in WS1 spruce. Satellite data from the Landsat TM and ETM+ instruments did not parallel laboratory spectral results, but showed a distinct increase in near-infrared reflectance between 1999-2007. See individual chapter abstracts for more complete summaries.
Kessler, Will Robinson, "Spectral effects of a calcium amendment on red spruce foliage at laboratory and stand scale" (2008). Master's Theses and Capstones. 423.