Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
Results
Showing 1 to 4 of 4 for “"cryptogam"”.
-
Microbial Mat Abundance and Activity in the McMurdo Dry Valleys, Antarctica
… due to the difficulty of measuring production in cryptogam vegetation. However, remote sensing can provide long-term, spatially-extensive estimates of primary production and are particularly well suited to remote environments, such as in the McMurdo Dry Valleys (MDV) of Antarctica, where …
-
Forest vegetation response to the application of municipal sewage sludge in the coastal western hemlock zone
… fern cover increased with sludge treatment. The cryptogam cover increased with treatment in the youngest stand, but decreased in the 1980 and 1964 stands. At the species level, Gaultheria shallon and Kindbergia oregana decreased while Pteridium aquilinum and Epilobium angustifolium increased with …
-
Arid land condition assessment and monitoring using mulitspectral and hyperspectral imagery.
… while combined vegetation, plant litter and soil cryptogam crust cover was predicted best at landscape scale (R2=0.39). The results of applying one of the stress related vegetation indices (STVI-4) to 1991 TM and 2002 ETM+ Landsat imagery to detect vegetation changes and to 2005 Landsat TM imagery …
-
The Evolutionary History of the Antarctic Flora
How long has the extant flora been present in the Antarctic? Glaciological reconstructions propose that most areas in Antarctica were covered by thick ice sheets throughout the Last Glacial Maximum (LGM; ~22-18 kya) as well as previous glaciations, suggesting terrestrial life must have been …