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Plant Biology

Marshall University

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Full-Text Articles in Life Sciences

Leveraging Herbaria Specimens: A New 3d Imaging Protocol And Analyses Of Diversity Of West Virginia Rosids, Zachary Scott Shamblin Jan 2022

Leveraging Herbaria Specimens: A New 3d Imaging Protocol And Analyses Of Diversity Of West Virginia Rosids, Zachary Scott Shamblin

Theses, Dissertations and Capstones

Herbaria are repositories of plant natural history, whose data can provide insights into the life histories of plant taxa over space and time. Recent initiatives to digitize herbarium data have made studies over broad geographic and taxonomic extents possible, with the ability of scientists to access data from large databases of herbaria. Most of the digitization initiatives have focused on flat 2D herbaria sheets, but herbaria also include 3D collections, such as fungi, mosses, lichens, and dry fruits. In Chapter 1 we propose an easy and cost-effective workflow that uses free photogrammetry software to produce 3D images of 3D herbaria …


The Future Of The Big Sagebrush Ecosystem: Plant Community Response To Grazing, Wildfire, And Invasive Annual Grass In A Changing Climate, Margaret Eleanor England Jan 2022

The Future Of The Big Sagebrush Ecosystem: Plant Community Response To Grazing, Wildfire, And Invasive Annual Grass In A Changing Climate, Margaret Eleanor England

Theses, Dissertations and Capstones

Climate change is increasingly affecting the plant communities across the world. In the Western United States, these changes are affecting plant communities and their risk of invasive species, as well as the frequency and severity of wildfire. Big sagebrush (Artemisia tridentata Nutt.) ecosystems of the Western United States are facing threats of increasingly frequent wildfire and invasion of the annual grass cheatgrass (Bromus tectorum L.), which may be exacerbated by global climate change. Past studies have found cheatgrass to exhibit a positive feedback loop with wildfire, and climate change is expected to facilitate expansion of the cheatgrass …


The Effects Of Endocrine Disrupting Chemicals On Plants, Christian Mathew Pridemore Jan 2021

The Effects Of Endocrine Disrupting Chemicals On Plants, Christian Mathew Pridemore

Theses, Dissertations and Capstones

Endocrine disrupting chemicals (EDCs) are a diverse group of chemicals which can have a detrimental effect on human health, affecting any physiological body system sensitive to hormonal changes. Human exposure to EDCs is inevitable due to their prevalence in modern living; EDCs are integral compounds found in everyday items with which humans interact and ingest. These, along with other indirect avenues leading to EDC exposure, pose a threat to both human health and to the health of wildlife and agricultural environments. Studies on the effects of EDCs on plants can be substantially informative and necessary for progress towards solving the …


Evaluating Potential Plant Hormone Cross Talk Between Auxin And Ethylene In Arabidopsis, Mia Lynne Brown Jan 2015

Evaluating Potential Plant Hormone Cross Talk Between Auxin And Ethylene In Arabidopsis, Mia Lynne Brown

Theses, Dissertations and Capstones

Auxin is the primary hormone responsible for plant growth and development. Regulation of auxin-response genes occurs through transcriptional activators (auxin response factors called ARFs) which bind to auxin response elements (AuxREs). Some auxin-responsive genes encode aminocyclopropane-1-carboxylic acid synthase (ACS) enzymes which regulate the production of the plant hormone ethylene. The major research objective was to evaluate transcriptional cross talk between auxin and ethylene. Both AuxREs and ethylene response elements were found in several ACS and ARF genes, suggesting cross talk between the two hormones at the transcriptional level. Analysis of transgenic Arabidopsis thaliana plants deficient in ARF7 and containing a …


A Two-Year Seasonal Analysis Of Wetland Vegetation At The Mcclintic Wildlife Management Area In Mason County, West Virginia, Anne Carrington Blankenship Jan 2005

A Two-Year Seasonal Analysis Of Wetland Vegetation At The Mcclintic Wildlife Management Area In Mason County, West Virginia, Anne Carrington Blankenship

Theses, Dissertations and Capstones

Disturbances play a key role in the structure of ecosystems. Most ecosystems are subject to several different disturbance regimes that occur at different temporal and spatial scales. Studying the effects of disturbances can lead to a better understanding of a vegetative community’s future productivity. However, in order to understand the effects of disturbance, a vegetative community should first be studied before the disturbance occurs. This study analyzes the composition and seasonal variations of vegetative communities in and around four ponds at the McClintic Wildlife Management Area in Mason County, West Virginia during two growing seasons prior to remediation activities in …


Effects Of Excessive Nitrogen Deposition On Foliar Nutrient Dynamics, Nutrient Concentrations, And Nutrient Ratios In A Central Appalachian Hardwood Forest, Sarah Beth Burdette Jan 2002

Effects Of Excessive Nitrogen Deposition On Foliar Nutrient Dynamics, Nutrient Concentrations, And Nutrient Ratios In A Central Appalachian Hardwood Forest, Sarah Beth Burdette

Theses, Dissertations and Capstones

Many forested systems of the eastern US are becoming significantly nitrogen (N) saturated due to chronic N deposition from the atmosphere. Nitrogen saturation has the potential to alter important internal plant processes, such as nutrient cycling. While extensive research has been conducted on the responses of soil to N saturation, considerably less research has focused on the response of plant nutrient dynamics, nutrient concentrations, and nutrient ratios to excess N. Research was conducted on two watersheds at the Fernow Experimental Forest in West Virginia: WS3 (fertilized with ammonium sulfate annually since 1989) and WS7 (untreated control). Presenescent and senesced leaves …


A Vegetation Analysis Of Plant Communities In And Around Selected Holding Ponds At Mcclintic Wildlife Management Area, Mason County, West Virginia, Russell Bowman Shrader Jan 1999

A Vegetation Analysis Of Plant Communities In And Around Selected Holding Ponds At Mcclintic Wildlife Management Area, Mason County, West Virginia, Russell Bowman Shrader

Theses, Dissertations and Capstones

This study was conducted as an analysis of vegetation in and around four ponds at McClintic Wildlife Management Area (MWMA), located in Mason County, West Virginia. The MWMA is the former West Virginia Ordnance Works (WVOW), having served as a trinitrotoluene (TNT) manufacturing site from 1941-1946. Such history presents the area with unique conditions resulting in diverse types and amounts of plants, since any type of forest disturbance, regardless of cause, alters ecosystem functions. This project was originally designed as part of a groundwater pump-and-treat plan for MWMA, where potential impacts of groundwater removal to ponds and the associated plant …


Morphometric Analysis And Comparisons Of Electrophoretic Protein Profiles Of The Scutellaria Ovata Hill (Lamiaceae) Complex In West Virginia, Virginia And Ohio With Emphasis On Shale Barren Taxa, Eric W. Ewing Jan 1996

Morphometric Analysis And Comparisons Of Electrophoretic Protein Profiles Of The Scutellaria Ovata Hill (Lamiaceae) Complex In West Virginia, Virginia And Ohio With Emphasis On Shale Barren Taxa, Eric W. Ewing

Theses, Dissertations and Capstones

Elements of the Scutellaria ovata complex in the eastern United States are reported to include S. ovata var. pseudoarguta, S. ovata var. rugosa, S. ovata var. virginiana and S. ovata ssp. ovata. All but S. ovata ssp. ovata occur in the shale barren habitat of eastern West Virginia and western Virginia. S. ovata var. pseudoarguta has been proposed as a threatened element in North America. A morphometric study of specimens collected in West Virginia, Virginia and Ohio was undertaken to determine which characters are most useful in separating taxa in the complex. Nineteen characters were assessed from 104 herbarium specimens …


Floristics, Plant Community Structure And Bank Profiles, For Five Sites Along The Middle Ohio River, Amy Nicole Morris Jan 1996

Floristics, Plant Community Structure And Bank Profiles, For Five Sites Along The Middle Ohio River, Amy Nicole Morris

Theses, Dissertations and Capstones

Plant community structure, floristics, and bank profiles for five sites along the middle Ohio River were described. Values obtained were compared with a similar study by Clagg and Mills in 1978 on four of the five sites. A total of 186 plant species was observed in the plant community and floristic study. Glenwood Bend had the greatest diversity with 109 plant species. Mason-Pomeroy had the lowest diversity with only 35 plant species. Six species, representing 3.2 percent of the total observed number of species, were present at all five sites. The majority of species, 51 percent, were present at only …


Vascular Flora Of Three Watersheds In The Fernow Experimental Forest And Factors Influencing Species Composition Of The Herbaceous Layer, Staci Dudash Smith Aulick Jan 1993

Vascular Flora Of Three Watersheds In The Fernow Experimental Forest And Factors Influencing Species Composition Of The Herbaceous Layer, Staci Dudash Smith Aulick

Theses, Dissertations and Capstones

Herbaceous layer communities respond to a number of environmental variables in forests: thus, study of the herb layer is essential for a more complete understanding of the forest ecosystem. The objectives of this study were to (1) describe the flora of the watersheds. (2) describe the species richness and diversity of watersheds 3, 4 , and 7 of the Fernow Experimental Forest, Parsons, West Virginia, and (3) examine stand and soil variables and their influence on the herbaceous communities or the forest. Watersheds were selected on the basis of stand age/history (WS3 "20yr, clearcut; WS7 "20 yr. clearcut and herbicide: …


Flora And Vegetation Of The Meadow River Wetlands, Greenbrier County, West Virginia, Alan Edward Brant Jan 1988

Flora And Vegetation Of The Meadow River Wetlands, Greenbrier County, West Virginia, Alan Edward Brant

Theses, Dissertations and Capstones

The Meadow River wetlands comprise the second largest wetland complex within the state of West Virginia, containing approximately 3131 acres (1392 ha) of swamp and wet meadow (Evans et al. 1982). Plant collecting within this complex as determined by available literature and herbarium specimens has been limited in the past and apparently dealt only with the wetlands near the head of Otter Creek. Grafton et al. (1982) conducted walk-through surveys in conjunction with a statewide wetland survey and the West Virginia Department of Highways performed a rather detailed vegetation analysis in the same area as part of an environmental impact …


The Effects Of Periodic Inundation On Corticolous Lichens Along Big Seven Mile Creek, Cabell County, West Virginia, Stephen Leslie Beckelhimer Jan 1982

The Effects Of Periodic Inundation On Corticolous Lichens Along Big Seven Mile Creek, Cabell County, West Virginia, Stephen Leslie Beckelhimer

Theses, Dissertations and Capstones

The distribution of corticolous lichens was studied along Big Seven Mile Creek, a tributary of the Ohio River using step-wise discriminant analysis. The populations appear to respond to complex interacting gradients of humidity, periodic inundation and the abrasive action of water transported debris. Hacroepiphytic coverage and species richness increased with height of the tree bole. Of all species observed, Arthonia caesia (Flot.)Korb and Physcia acinulata Mul. Arg. possess­ed the highest tolerance to periodic inundation. In addition, these species were found to have the highest resistance to scouring by water-borne debris. Candelaria concolor (Dicks.) B. Stein, Parmelia hypotropa Nyl. and Physcia …


Flora And Vegetation Of Five Natural Wetlands In The Kanawha And Ohio River Floodplains, Southwestern West Virginia, Bernadine Phillips Brumfield Jan 1982

Flora And Vegetation Of Five Natural Wetlands In The Kanawha And Ohio River Floodplains, Southwestern West Virginia, Bernadine Phillips Brumfield

Theses, Dissertations and Capstones

Flora and vegetation were studied in five natural wetlands along the Kanawha and Ohio Rivers, southwestern West Virginia. Vegetation was analysed using a stratified-ran­dom approach with nested quadrats along line transects. The abundance of dead trees suggests an overall increase in water level with time. One to three canopy species comprise 75 percent of the Basal Area at all five sites. Acer rubrum and Quercus palustris are the dominant species at the Winfield East, Winfield West and Pt. Pleasant sites. Salix nigra is the dominant species at McCausland Run site and Acer saccharinum is dominant at the Guyan Creek Oxbow …