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ECOSYSTEM RESPONSES TO CLIMATE VARIABILITY AND MANAGEMENT PRACTICES: DROUGHT ASSESSMENT (REMOTE SENSING), FIELD MEASUREMENTS (EDDY COVARIANCE) AND MODELING (DNDC)
(2017-12-15)
Climate variability and management practices in isolation or in combination influence the properties of ecosystems and the flows of energy and materials through them. The goal of this dissertation is to better understand ...
AN INVESTIGATION INTO THE INFLUENCE OF SUBSURFACE GEOCHEMISTRY ON MICROBIAL COMMUNITIES IN AN UNCONFINED CONTAMINATED AQUIFER
(2018)
Microorganisms account for ~ 90 gigatons of carbon in terms of global biomass and are important drivers of elemental cycling especially in oligotrophic subsurface environments. Subsurface ecosystems remain poorly characterized ...
CARBON-WATER COUPLING OF TERRESTRIAL ECOSYSTEMS IN RESPONSE TO CLIMATE CHANGE AND CLIMATE VARIABILITY
(2019-05-10)
Carbon and water cycles are two fundamental biophysical processes in terrestrial ecosystems. Rain use efficiency (RUE), defined as the ratio of ecosystem productivity to precipitation (PPT), and water use efficiency (WUE), ...
SINGLE-NUCLEOTIDE RESOLUTION VIEW OF GENE EXPRESSION IN ESCHERICHIA COLI K-12 UNDER VARIOUS PHYSIOLOGICAL CONDITIONS
(2015-05-08)
We analyzed the transcriptome of Escherichia coli K-12 by strand-specific RNA sequencing at single-nucleotide resolution during logarithmic- growth and upon entry into stationary phase under carbon, nitrogen, and phosphate ...
Systems analysis of grass cell wall biosynthesis for biofuel production
(2017-05)
Grass cell walls play an important role in plant development, pathogen defense, and are an abundant and sustainable carbon source for biofuel production. Chapter 1 introduces the great impact of cell wall composition on ...
FUNCTIONAL GENOMICS STUDIES OF CLOSTRIDIUM CELLULOLYTICUM FOR LIGNOCELLULOSE BIOCONVERSION
(2016-12)
The astonishing consumption of fossil fuels arouses serious concerns over energy security and environmental sustainability. Lignocellulosic biofuel, as a sustainable and carbon-neutral energy that can be produced from ...
THE IMPACT OF LONG-TERM ELEVATED ATMOSPHERIC CARBON DIOXIDE ON BELOWGROUND MICROBIAL COMMUNITY AT CONTRAST NITROGEN CONDITIONS
(2017-12)
Global terrestrial ecosystems are subjected to various climate change factors, including the concurrent elevated CO2 (eCO2) and nitrogen deposition (eN). Despite the increasing appreciation that eCO2 and eN can interactively ...
NADH-DEPENDENT, FERREDOXIN-INDEPENDENT HYDROGEN PRODUCTION IN TWO MODEL SYNTROPHIC BACTERIA
(2019-05-10)
The relationship between a fatty acid-oxidizing, hydrogen-producing bacterium and a hydrogen consuming methnogenic partner has longed served as a model system for anaerobic syntrophic metabolism. This process is dependent ...
ANAEROBACULUM HYDROGENIFORMANS: INSIGHTS INTO THE NOVEL BIOCHEMICAL AND PHYSIOLOGICAL ABILITY OF A THERMOPHILIC BIOCATALYST THAT CAN UTILIZE BOTH DEFINED AND UNDEFINED SUBSTRATES FOR THE PRODUCTION OF RENEWABLE HYDROGEN ENERGY
(2011)
This body of work describes the bacterium Anaerobaculum hydrogeniformans strain OS1, a novel anaerobic, moderately thermophilic, NaCl-requiring fermentative bacterium that was isolated from oil production water collected ...
BET-HEDGING IN HETEROCARPIC GRINDELIA CILIATA (ASTERACEAE)
(2017-05-12)
A challenge for all living organisms is to offset the fitness associated risks of environmental uncertainty. Bet-hedging strategies are adaptive in unpredictable environments and are documented in a wide range of taxa ...