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Full-Text Articles in Life Sciences
Reburns Of High Severity Patches: Effects On Ponderosa Pine Regeneration And Plant Community Composition, Nadav Mouallem
Reburns Of High Severity Patches: Effects On Ponderosa Pine Regeneration And Plant Community Composition, Nadav Mouallem
All Graduate Theses and Dissertations, Fall 2023 to Present
The area burned in high severity fire as well as the proportion of fires burning at high severity have been increasing in southwestern ponderosa pine (Pinus ponderosa) forests since the 1980s. These fires often contain large patches (>100 ha) of 100% tree mortality, which are a concern as they can lead to the establishment of nonnative species and conversion to non-forest vegetation. And, with an increasing amount of fire on the landscape, high severity patches are reburning. However, information on the ecological trajectory of reburns of high-severity patches as well as the utility of remotely sensed burn severity metrics …
Environmental Factors Associated With Triploid Aspen Occurrence In Intermountain West Landscapes, James A. Walton
Environmental Factors Associated With Triploid Aspen Occurrence In Intermountain West Landscapes, James A. Walton
All Graduate Theses and Dissertations, Fall 2023 to Present
Polyploidy is common among plants and can contribute to physiological and morphological differences, altering how plants respond to environmental changes, promoting genetic diversification and even species radiation. Quaking aspen (Populus tremuloides), a keystone species associated with high plant and animal diversity is frequently found in mixed diploid/triploid populations in the Intermountain West. Triploid aspen carries an extra chromosomal copy, whereas the diploid type contains two chromosomal copies. High mortality rates and widespread population declines in aspen are of increasing concern in the Intermountain West, and often ascribed to changing climates and drought stress events. The goal of this …