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Arctic tundra vegetation functional types based on photosynthetic physiology and optical properties (Document No: 20130014409)
| Content Provider | NASA Technical Reports Server (NTRS) |
|---|---|
| Author | Gamon, John Landis, David R. Tweedie, Craig Campbell, Petya K. Middleton, Elizabeth M. Huemmrich, Karl F. |
| Copyright Year | 2013 |
| Description | Non-vascular plants (lichens and mosses) are significant components of tundra landscapes and may respond to climate change differently from vascular plants affecting ecosystem carbon balance. Remote sensing provides critical tools for monitoring plant cover types, as optical signals provide a way to scale from plot measurements to regional estimates of biophysical properties, for which spatial-temporal patterns may be analyzed. Gas exchange measurements were collected for pure patches of key vegetation functional types (lichens, mosses, and vascular plants) in sedge tundra at Barrow AK. These functional types were found to have three significantly different values of light use efficiency (LUE) with values of 0.013+/-0.001, 0.0018+/-0.0002, and 0.0012+/-0.0001 mol C/mol absorbed quanta for vascular plants, mosses and lichens, respectively. Discriminant analysis of the spectra reflectance of these patches identified five spectral bands that separated each of these vegetation functional types as well as nongreen material (bare soil, standing water, and dead leaves). These results were tested along a 100 m transect where midsummer spectral reflectance and vegetation coverage were measured at one meter intervals. |
| File Size | 759478 |
| Page Count | 43 |
| File Format | |
| Alternate Webpage(s) | http://archive.org/details/NASA_NTRS_Archive_20130014409 |
| Archival Resource Key | ark:/13960/t6062jr55 |
| Language | English |
| Publisher Date | 2013-03-31 |
| Access Restriction | Open |
| Subject Keyword | Earth Resources And Remote Sensing Climate Change Lichens Terrain Spectrum Analysis Vegetation Gas Exchange Remote Sensing Arctic Regions Ntrs Nasa Technical Reports Server (ntrs) Nasa Technical Reports Server Aerodynamics Aircraft Aerospace Engineering Aerospace Aeronautic Space Science |
| Content Type | Text |
| Resource Type | Article |
