Biology ETDs
Publication Date
Fall 12-16-2019
Abstract
The McMurdo Dry Valleys (MDV) of Antarctica are on the threshold of widespread landscape scale change due to increasing temperature and solar radiation and altered hydrology: buried ice is melting, the soil active layer is thickening, thermokarst features are developing along streams, water tracks are expanding, and lake levels are rising. These changes will impact the microbial communities found in each of the affected habitats. The purpose of this work is to first, understand the spatial distribution of soil bacteria in the MDV, specifically investigating the scale-dependent effects of environmental heterogeneity, and second, to perform surveys and coupled experiments to document and assess the impacts of these changes on the associated microbial communities. Our results suggest that this region harbors highly adapted, endemic communities that are susceptible to changing environmental conditions.
Project Sponsors
NSF OPP Award # 1245991 & 1142102
Language
English
Keywords
McMurdo Dry Valleys, Antarctica, Soil Bacteria, Spatial Heterogeneity, Water tracks, Soil active layer
Document Type
Dissertation
Degree Name
Biology
Level of Degree
Doctoral
Department Name
UNM Biology Department
First Committee Member (Chair)
Dr. Donald Natvig
Second Committee Member
Dr. David Van Horn
Third Committee Member
Dr. Robert Sinsabaugh
Fourth Committee Member
Dr. Becky Ball
Recommended Citation
Feeser, Kelli L.; David J. Van Horn; Heather N. Buelow; Daniel R. Colman; Theresa A. McHugh; Jordan G. Okie; Egbert Schwartz; Cristina D. Takacs-Vesbach; Becky A. Ball; Andrew G. Fountain; Michael N. Gooseff; Joseph S. Levy; and Maciej K. Obryk. "A LANDSCAPE ON THE THRESHOLD OF CHANGE: PATTERNS OF SOIL MICROBIAL ECOLOGY ALONG DYNAMIC GEOMORPHIC AND HYDROLOGIC FEATURES IN A POLAR DESERT." (2019). https://digitalrepository.unm.edu/biol_etds/349
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Bioinformatics Commons, Biology Commons, Environmental Microbiology and Microbial Ecology Commons, Environmental Sciences Commons, Terrestrial and Aquatic Ecology Commons