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Articles 1 - 7 of 7
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Does Invasion Science Encompass The Invaded Range? A Comparison Of The Geographies Of Invasion Science Versus Management In The U.S., Lara Munro
Masters Theses
Biases in invasion science lead to a taxonomic focus on plants, particularly a subset of well-studied plants, and a geographic focus on invasions in Europe and North America. Geographic biases could also cause some branches of invasion science to focus on a subset of environmental conditions in the invaded range, potentially leading to an incomplete understanding of the ecology and management of plant invasions. While broader, country-level geographic biases are well known, it is unclear whether these biases extend to a finer scale and thus affect research within the invaded range. This study assessed whether research sites for ten well-studied …
Hormonal Responses To Seasonal Thermal And Ecological Stressors In Japanese Macaques (Macaca Fuscata), Lilianne Nelson
Hormonal Responses To Seasonal Thermal And Ecological Stressors In Japanese Macaques (Macaca Fuscata), Lilianne Nelson
Masters Theses
Relative to most primate species, Japanese macaques (Macaca fuscata) experience extreme seasonal variation in thermal and ecological stressors that can impact energetic demands. To cope with these environmental changes, levels of metabolic hormones, such as cortisol and triiodothyronine, fluctuate to facilitate energetic adjustments. While previous research in primates has investigated thermal and ecological stressors individually, a combined assessment of these stressors alongside hormone levels can provide a more holistic understanding of the relationship between a primate’s thermoregulation, energetic balance, and stress. The goals of this study were to determine the effects of season, temperature and ecological stress on …
Improving Conservation And Recreation In Environments Shared By Humans And Bats, Hannah Shapiro
Improving Conservation And Recreation In Environments Shared By Humans And Bats, Hannah Shapiro
Masters Theses
White-nose syndrome (WNS) has drastically changed how caves are managed in the United States. This disease has killed millions of bats throughout eastern North America and continues to spread westward. Since the discovery of WNS, The U.S. National Park Service (NPS) has acted to slow the spread of the disease through the development of educational programs and the deployment of decontamination measures. Despite the vast array of research on the biological and ecological aspects of bats and WNS, few studies focus on how visitor attitudes and knowledge of management strategies implemented in response to WNS impact the effectiveness of these …
Variation In Tundra Plant Traits Across A Latitudinal Gradient, Katlyn Rose Betway
Variation In Tundra Plant Traits Across A Latitudinal Gradient, Katlyn Rose Betway
Masters Theses
High latitude regions are warming faster than most regions. Studies documenting change in plant cover due to warming have reported that graminoids, deciduous shrubs, and evergreen shrubs are increasing in some regions of the Arctic, but not at others. Mixed responses to warming have caused researchers to shift towards an emphasis on functional traits of individual species rather than their growth forms. This thesis focuses on ten measured plant functional traits for twelve arctic species at three regions spanning a latitudinal gradient in northern Alaska (Utqiaġvik, Atqasuk, and Toolik Lake). We compare mean trait values across the three regions for …
Impact Of Insecticide On Pollinator Communities In A Forested System: A Model System Using Eastern Hemlock, Tsuga Canadensis, Rosebay Rhododendron, Rhododendron Maximum, And Imidacloprid, David Bechtel
Masters Theses
Mortality of eastern hemlock, Tsuga canadensis (L.) Carrière (Pinales: Pinaceae), has occurred at a high rate since the arrival of the invasive hemlock wooly adelgid (HWA), Adelges tsugae Annand (Hemiptera: Adelgidae). The systemic neonicotinoid pesticide imidacloprid is soil-applied to hemlocks for effective control of HWA. However, is this pesticide translocated by incidental non-target plants under hemlock trees and, if so, does it impact non-target insects, such as pollinators? One commonly encountered flowering understory associate is Rhododendron maximum L. (Ericales: Ericaceae). Research has demonstrated that imidacloprid is translocated to leaves, nectar and pollen of R. maximum. The goal of this research …
Is Context Dependency Imperative To Understanding The Impacts Of Invasive Plants?, Brendan B. Haile
Is Context Dependency Imperative To Understanding The Impacts Of Invasive Plants?, Brendan B. Haile
Masters Theses
Introduced exotic species have a tendency to become invasive and impact local biological communities. Invasions often impact community attributes such as cover and species richness, but these factors may also regulate patterns of invasion. In such cases, impacts may be dependent on the invasion context. We used data from the Buell-Small Succession Study, a long-term permanent plot study in the piedmont region of New Jersey, to document context dependency in invasion. To do this, we analyzed the factors that affected the colonization and growth of four invasive species, Alliaria petiolata, Lonicera japonica, Microstegium vimineum and Rosa multiflora, as well …
Identification And Analysis Of Genes With Differential And Tissue-Specific Expression In Poplars, Bailey Mitchell
Identification And Analysis Of Genes With Differential And Tissue-Specific Expression In Poplars, Bailey Mitchell
Masters Theses
Poplars have become one of the most frequently studied plant species for their applications in biotechnology, commercial benefits, and ecological importance. Microarray analysis is commonly used to analyze differential gene expression in many organisms. Investigations have examined differential gene expression and performed functional analyses on a single tissue or organ within poplar trees or a closely related set of tissues and organs, but usually do not broadly analyze gene expression across a large number of tissues and organs in poplar. This thesis work aims to generate data on the most differentially expressed genes for the major groups of tissues and …