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.
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Showing 1 to 20 of 42 for “"species variation"”.
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Plant growth responses to winter climate change: from amongand within-species variation to plant-soil interactions
… to bring about differences in among- and within-species growth responses. The objective was to detect growth differences in the responses of species, ecotypes and plant functional groups to winter processes impacted by warmer temperatures. Therefore, experiments were carried out to simulate …
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Spatial, temporal and within-species variation in the foraging ecology of a marine predator across a dynamic seascape
Spatial, temporal and within-species variation in the foraging ecology among consumers add to the complexities of trophic structure and its processes across all biomes on Earth. In this dissertation, I investigated the foraging ecology and plasticity of an ice-adapted marine predator, the ringed …
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Molecular and Neural Mechanisms Underlying Courtship Song Evolution in Drosophila
… exhibit extraordinary behavioral diversity. How species variation in complex motor behaviors is encoded by evolutionary changes in genes and neurons is unclear. To fill in this knowledge gap, my colleagues and I take advantage of the diversification of Drosophila courtship songs as a model system …
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Characterisation of bacteria by surface enhanced Raman spectroscopy (SERS)
… Therefore, rapid detection of bacterial species causing infection could help inform clinicians regarding appropriate antibiotic treatment. Numerous techniques are available for the detection of bacteria causing infection including culture-based, molecular, and spectroscopic techniques. …
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A mastofauna do estado do Rio de Janeiro, com especial referência à ordem Polyprotodontia (Marsupiais)
… density-independent factors that might affect species' presence are reviewed, as is the history of mammal collecting and studies since the 16th century. A provisional species list for the state is also given. To exemplify the treatment to be given to the rest of the mammal fauna, the thirteen …
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Diet of three mormoopid bats (<i>mormoops blainvillei</i>, <i>pteronotus quadridens</i>, and <i>pteronotus portoricensis</i> ) on Puerto Rico
… The most common orders for all three species were Coleoptera, Hymenoptera, and Lepidoptera, although the relative proportions of these orders differed among species. Variation in diet was primarily due to species, but season, habitat, and sex also affected the composition of insects in …
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Loss of LasR function reshapes inter-species interactions in a polymicrobial cystic fibrosis airway model
… Gram-negative, Gram-positive, and fungal species can significantly impact the outcomes of these airway infections. Factors like intra-species genetic variation and (potentially existential) environmental challenges such as antibiotic treatment further complicate the situation. However, our …
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A multi-scale exploration of the drivers and implications of germination strategy in Australian alpine plants
… global warming because they are characterized by species adapted to low temperatures. Although adapted to low temperatures, alpine plants may still be capable of persisting under a changing climate and this will largely be dependent on the ability of their seeds to germinate, establish and …
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A multi-scale exploration of the drivers and implications of germination strategy in Australian alpine plants
… global warming because they are characterized by species adapted to low temperatures. Although adapted to low temperatures, alpine plants may still be capable of persisting under a changing climate and this will largely be dependent on the ability of their seeds to germinate, establish and …
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Mechanisms of toxicity and carcinogenicity of three alkylanilines
… the levels of adducts exhibited inter-species variation. The effects of phase II metabolism on adduct formation were evaluated by comparing the results obtained from the two types of assays and by assessing the effects of phase II enzyme cofactors on the results of cell-free assay.
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Validation Of Kentucky Wetlands Rapid Assessment Method (ky-Wram) Metrics Using Macroinvertebrate Communities Of Forested Depressional Wetlands
… Analysis was used to evaluate the amount of species variation explained by the RAMs and RAM metrics. A Redundancy Analysis was conducted to model the amount of species variation explained due to habitat and water quality variables. In both multiple regression and multivariate analyses, water …
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Comparative Studies of Numerical Cognition in Nonhuman Primates: From Numerical Comparison to Arithmetic
… in wide-ranging taxa or using individual species as models for comparisons with humans. Recent findings in numerical cognition have suggested that evidence for approximate numerical abilities in nonhuman species may indicate that humans and animals share a cognitive system for representing …
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Sociosexual Development: Infusing the Belsky, Steinberg, and Draper Model with Sexual Selection
… theory attempts to explain between- and within-species variation in maturational and reproductive patterns, whereas sexual selection attempts to explain between- and within-sex differences in intersexual mate choice and intrasexual competition for members of the opposite sex. These two expansive …
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Rehabilitation of Severely Compacted Urban Soil to Improve Tree Establishment and Growth
… root distribution was not measured for other species. Rehabilitation improved soil physical properties and tree growth after two years. Species variation in growth rate and environmental tolerance appeared to influence early growth treatment effects. Long-term data is needed to fully …
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Cities for birds, birds for cities: The urban ecology of birds across scales from global sampling to individual responses
… monitoring framework to city-level drivers of species prevalence and individual behavioural responses to human activity in an urban songbird. In Chapter 2, I describe and validate the Global Urban Bird Survey, a standardized acoustic monitoring protocol applied across multiple cities to …
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Seasonal and Annual Variability In Elemental and Isotopic Proxies of Past Ocean Conditions: Results From the Guaymas and Cariaco Basins
… temperatures, the abundance of warm water species is increasing, while the cold water species are decreasing. On average 80% of the foraminiferal shells dissolve while settling through the water column from 230 to 1200m, although the assemblage was not significantly modified. The δ18O data …
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The effects of stress hormones on preferences for acoustic signals in female green treefrogs (Hyla cinerea) and barking treefrogs (Hyla gratiosa)
… are often associated with increased variation in mate choice by females. The association between environmental stressors and variation in mate choice suggests that circulating stress hormones (i.e., glucocorticoids) may mediate such effects, but this idea remains largely unexplored. I …
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D-arabinitol in the diagnosis of invasive candidiasis
… L-arabintiol (LA). Several pathogenic Candida species produce DA in vitro and high DA levels have been detected in serum and urine in patients with IC. Renal dysfunction affects serum DA levels, serum and urine DA/LA or serum DA/creatinine are therefore measured to correct for kidney …
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