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Conservation and ecology of breeding landbirds in a riparian restoration context
(University of Missouri--Columbia, 2006)
While $14 to $15 billion have been invested in 37,000+ river and stream restoration projects in North America since 1990, only 10% are monitored for biological function. My work examines factors that affect landbird demographics in the context...
Ecological genomics of divergence, admixture, and fitness in the smallmouth bass (Micropterus dolomieu)
(University of Missouri--Columbia, 2021)
, equipment, and conservation permits. Along with their extreme popularity, they are of central importance in their native ecosystems throughout central and eastern North America. They are voracious apex predators, controlling top-down food web dynamics among...
A monograph of Lupinus for Argentina
(University of Missouri--Columbia, 1978)
The species of Lupinus for Argentina are reviewed in a morphological and taxonomic study. For the country of Argentina and vicinity there were 85 species cited. Over 45 holotypes, numerous isotypes and several non-type ...
Conservation genetics of conflict in the Asian elephant, Elephas maximus
(University of Missouri--Columbia, 2021)
, in the Bago Yoma region of Myanmar, evaluates the impact of direct human-conflict in a high-density area of humans and elephants. Here elephants are heavily impacted by the developing skin trade, and condensed populations frequently raid local farms forined...
Centromere function and evolution in maize (Zea mays)
(University of Missouri--Columbia, 2006)
of repetitive elements showing that certain families of retrotransposons are enriched in the heterochromatic regions flanking the centromere. Finally, I describe a novel chromosomal rearrangement, an inversion with a breakpoint in the centromere that splits...
Seasonality and elevational migration in an Andean bird community
(University of Missouri--Columbia, 2010)
elevational migration and mixed-species flocking. The percentage of elevational migrants along the entire elevational gradient was higher than at Central American sites of similar latitude in the northern hemisphere, affirming a north-south geographic pattern...
Effects of prescribed fire and timber harvest on terrestrial salamander abundance, behavior, and microhabitat use
(University of Missouri--Columbia, 2014)
The goal of my dissertation was to assess how terrestrial salamanders respond to two common forest management practices -- prescribed fire and timber harvest. Previous studies have reported that timber harvest adversely ...
Weed versus wildflower : mating system ecology in a taraxacum native-exotic contact zone
(University of Missouri--Columbia, 2020)
Closely related plant species often exhibit differences in ploidy level, mode of reproduction, and traits related to reproduction. Differences in ploidy levels are often associated with mating system differentiation, ...
Periconceptional, gestational, and lactational exposure to unconventional oil and gas chemical mixture alters energy expenditure in adult female mice
(University of Missouri--Columbia, 2018)
[ACCESS RESTRICTED TO THE UNIVERSITY OF MISSOURI AT AUTHOR'S REQUEST.] Unconventional oil and gas (UOG) processes involves injection of pressurized water, chemicals, and suspended solids thousands of feet under the surface ...
The ecological roles of amphibians and subsidies in ponds
(University of Missouri--Columbia, 2018)
large temporal differences in food-web dynamics. These results underscore the need for more information into how ecosystem functioning could be altered by land use and amphibian species losses. One central problem of amphibian recovery efforts is that we...
Identification, characterization and use of novel thermogenetic tools in drosophilia melanogaster
(University of Missouri--Columbia, 2019)
regions. Hence, in the second chapter, we tested for the avoidance behavior of flies using two choice assays. We made mutant flies that lacked Gr28b proteins, including Gr28bD in the antennae. We then examined the ability of the orthologs to rescue...
A multi-scale investigation of ecologically relevant effects of agricultural runoff on amphibians
(University of Missouri--Columbia, 2008)
Modification of landscapes for agricultural production can introduce agrochemicals into surface waters and degrade aquatic habitats used by many amphibians for breeding and larval development. Although many ecotoxicological ...
Friends in high places : ecology of mycorrhizal associations in alpine plant communities
(University of Missouri--Columbia, 2010)
Mutualisms are ubiquitous in nature, yet these interactions often vary in strength and persistence. This variation raises the questions of what determines whether mutualisms persist or vanish, and how does variation in the ...
Mating systems in Nicotiana longiflora and N. Plumbaginifolia : the effect of interspecific interactions
(University of Missouri--Columbia, 2008)
The research presented here was focused on the effects of interactions between Nicotiana longiflora and N. plumbaginifolia on their mating systems. First, I conducted a series of observations and pollination experiments ...
Dissecting the genetic basis of carbohydrate partitioning in maize and sugarcane
(University of Missouri--Columbia, 2022)
Carbohydrate partitioning, the process by which carbohydrates synthesized in the photosynthetic source tissues (mature leaves) are mobilized to non-photosynthetic (sink) tissues, such as roots, seeds, and developing organs ...
The impacts of partner abundance on benefits from facultative pollination mutualism
(University of Missouri--Columbia, 2010)
Partner abundance affects costs and benefits in obligate mutualisms, but its role in facultative partnerships is less clear. I investigated this topic in a small alpine pollination web in the Colorado Rocky Mountains ...
Dissecting the genetic basis of learning, memory, and thermal tolerance in a multi-parental population of fruit flies
(University of Missouri--Columbia, 2021)
feasible apart - down to a single gene - regions of the genome that influence complex phenotypes. For my Ph.D., I took a quantitative genetics and genomics approach to dissect the genetic basis of learning, memory, and thermal tolerance in Drosophila...
Developmental programming by xenoestrogens
(University of Missouri--Columbia, 2011)
[ACCESS RESTRICTED TO THE UNIVERSITY OF MISSOURI AT REQUEST OF AUTHOR.] Xenoestrogens (XE) are chemicals in the environment that mimic the body's natural steroidal estrogens. Developmental exposure to XE may interfere with ...
Amphibian metamorphosis and juvenile terrestrial performance following chronic cadmium exposure in the aquatic environment
(University of Missouri--Columbia, 2005)
sphenocephala) and American toad (Bufo americanus), two common North American habitat generalists that utilize Cd-contaminated breeding sites. It was expected that Cd exposure would decrease the growth and survival of tadpoles and juveniles because Cd affects...
Brassicales to Brassica : integrating phylogenomics and population genomics
(University of Missouri--Columbia, 2020)
and domesticated types, I have determined that cultivation likely originated in the Eastern Mediterranean region, with additional domestications occurring around the world. I also identified feral populations that had previously been mistaken as progenitor...