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Articles 1 - 30 of 146
Full-Text Articles in Botany
A Genetic Analysis Of The Rare Endemic Astragalus Ripleyi Barneby, Juan Antonio Jaramillo-Chico
A Genetic Analysis Of The Rare Endemic Astragalus Ripleyi Barneby, Juan Antonio Jaramillo-Chico
Master's Theses
Astragalus ripleyi Barneby is a rare endemic species found in the San Luis Valley of the southern portions of the Rocky Mountains in Colorado and New Mexico. Though not federally listed as endangered, the species is on the Bureau of Land Management’s Sensitive Species List, warranting protection and continued management. This study aims to provide information about the genetic health of the species to inform conservation efforts and provide updated management recommendations. A genetic health analysis was conducted investigating the levels of diversity present in the species, how genetic diversity is structured across the known range of the species and …
Depth And Soil Physical Context Govern Soil Organic Carbon, While Woody Cover Moderates Native Vegetation Relationships In California Rangelands, Dabid Zuniga Garcia
Depth And Soil Physical Context Govern Soil Organic Carbon, While Woody Cover Moderates Native Vegetation Relationships In California Rangelands, Dabid Zuniga Garcia
Cal Poly Humboldt theses and projects
Soil organic carbon (SOC) is central to soil function and an important component of climate mitigation in rangeland ecosystems, but the controls on SOC across California’s working rangelands remain understudied. Using data from Point Blue Conservation Science’s Rangeland Monitoring Network, this study evaluated how soil properties, vegetation structure, and recent climate relate to SOC concentration at depths of 0–10 cm and 10–40 cm across 145 ranches spanning four California regions. Linear mixed-effects models showed that SOC was consistently higher in topsoil than subsoil and highest in coastal sites relative to interior valleys. Bulk density was the strongest negative predictor of …
The Inherent Values Of Observation And Description: A Case Study In The Spiny Solanums Of Australia, Christopher T. Martine
The Inherent Values Of Observation And Description: A Case Study In The Spiny Solanums Of Australia, Christopher T. Martine
Faculty Journal Articles
The basic exploratory effort of doing descriptive biology is an avenue by which we can deepen our knowledge about taxa and the natural phenomena that drive their diversification. As Conniff (2011) wrote in The species seekers, “we still live in the great age of discovery”, and much like that historically recognized period of the eighteenth and nineteenth centuries there remains today a distinct need for the sort of work that might have been attributable to the naturalists of that time. The careful observation of how organisms go about their lives, including how they interact with one another …
Genomic Structure Among Populations Of A Regionally Rare Perennial Plant Indicates The Need For Reevaluation Of Management Units, Cheyenne Moore, Angela J. Mcdonnell, Scott Schuette, Christopher T. Martine
Genomic Structure Among Populations Of A Regionally Rare Perennial Plant Indicates The Need For Reevaluation Of Management Units, Cheyenne Moore, Angela J. Mcdonnell, Scott Schuette, Christopher T. Martine
Faculty Journal Articles
Conservation of rare species often relies on the delineation of management units and genomic tools can now be applied for this purpose. However, this is not as common on a local scale, where populations are often small and fragmented, despite the utility of informing conservation and management practice at the regional level. We use a genotyping by sequencing (GBS) approach to assess the perennial riparian plant species Baptisia australis (Fabaceae) in Pennsylvania, where the taxon is at the edge of its natural distribution and considered threatened. In this system, we investigate whether sampled subpopulations exhibit genetic structure. We find that …
Oregon State Rank Assessment For Kruckeberg Mountainbalm (Monardella Kruckebergii), Nora Dunkirk, Gabriel E. Campbell
Oregon State Rank Assessment For Kruckeberg Mountainbalm (Monardella Kruckebergii), Nora Dunkirk, Gabriel E. Campbell
Institute for Natural Resources Publications
Oregon state conservation status assessment for Kruckeberg mountainbalm (Monardella kruckebergii) using NatureServe methodology, 2025.
Oregon State Rank Assessment For Western Marsh-Rosemary (Limonium Californicum), Nora Dunkirk, Gabriel E. Campbell
Oregon State Rank Assessment For Western Marsh-Rosemary (Limonium Californicum), Nora Dunkirk, Gabriel E. Campbell
Institute for Natural Resources Publications
Oregon state conservation status assessment for western marsh-rosemary (Limonium californicum) using NatureServe methodology, 2025.
Oregon State Rank Assessment For Pt. Reyes Bird's-Beak (Chloropyron Maritinum Ssp. Palustre), Nora Dunkirk, Gabriel E. Campbell
Oregon State Rank Assessment For Pt. Reyes Bird's-Beak (Chloropyron Maritinum Ssp. Palustre), Nora Dunkirk, Gabriel E. Campbell
Institute for Natural Resources Publications
Oregon state conservation status assessment for Pt. Reyes bird's-beak (Chloropyron maritimum ssp. palustre) using NatureServe methodology, 2024.
Growth Of Passionflower (Passiflora Incarnata) On A Green Roof Using Commercial Fertilizer Vs. Natural Compost, Siobhan Day, Corinne Parker, Carmyn Harrison, Lauren York
Growth Of Passionflower (Passiflora Incarnata) On A Green Roof Using Commercial Fertilizer Vs. Natural Compost, Siobhan Day, Corinne Parker, Carmyn Harrison, Lauren York
Science University Research Symposium (SURS)
Passionflower (Passiflora incarnata), Tennessee’s state wildflower, is valued for its ecological role as a pollinator plant and its historical significance to the Cherokee, making it an ideal candidate for green roofs that support biodiversity and urban sustainability. This study examined the feasibility of growing passionflower on a green roof and tested whether commercial fertilizer (Miracle-Gro) or natural compost would lead to greater growth compared to no fertilizer. Twelve plants were divided equally into three treatment groups: control, Miracle-Gro, and compost, with growth measurements taken weekly from September to November. Results suggest that passionflowers treated with Miracle-Gro achieved the most growth, …
Oregon State Rank Assessment For False Naked Wild-Buckwheat (Eriogonum Novonudum), Nora Dunkirk
Oregon State Rank Assessment For False Naked Wild-Buckwheat (Eriogonum Novonudum), Nora Dunkirk
Institute for Natural Resources Publications
Oregon state conservation status assessment for False Naked Wild-buckwheat (Eriogonum novonudum) using NatureServe methodology, 2024.
Oregon State Rank Assessment For Rough Popcorn Flower (Plagiobothrys Hirtus), Nora Dunkirk
Oregon State Rank Assessment For Rough Popcorn Flower (Plagiobothrys Hirtus), Nora Dunkirk
Institute for Natural Resources Publications
Oregon state conservation status assessment for rough popcorn flower (Plagiobothrys hirtus) using NatureServe methodology, 2024.
Scientific Note: An Incursion Of The Widely-Cultivated Katsura (Cercidiphyllum Japonicum, Cercidiphyllaceae) In Pennsylvania, Kayleigh R. Long, Melody P. Sain, Elizabeth H. Williams, Christopher T. Martine
Scientific Note: An Incursion Of The Widely-Cultivated Katsura (Cercidiphyllum Japonicum, Cercidiphyllaceae) In Pennsylvania, Kayleigh R. Long, Melody P. Sain, Elizabeth H. Williams, Christopher T. Martine
Faculty Journal Articles
Cercidiphyllum japonicum (katsura) is a dioecious tree native to China and Japan. Although imperiled in parts of its natural distribution, the species has become quite common as a cultivated tree in temperate North America. The species is noted as occasionally escaping cultivation in the eastern United States, but few records of established incursions (and the conditions under which they might recruit) exist in the literature. We here report an incursion of C. japonicum in central Pennsylvania, along with notes on seedling recruitment on the Bucknell University campus.
Cross-Pollination: Building A Co-Taught Course To Examine Art And Sex Through The Lens Of Botany, Christopher T. Martine, Diamanda A. Zizis, Anna K. Kell
Cross-Pollination: Building A Co-Taught Course To Examine Art And Sex Through The Lens Of Botany, Christopher T. Martine, Diamanda A. Zizis, Anna K. Kell
Faculty Journal Articles
Driven by overlapping interests in plants, art, and diversity in sex expression, Anna Kell (Department of Art and Art History) and Chris Martine (Department of Biology) developed a course that integrates the perspectives of a visual artist and a botanist. Art & Sex Through the Lens of Botany seeks to impart the importance of making connections across disciplines and the value of visual literacy across academic lines. The course introduces foundational concepts in each field and encourages students to integrate and explore these different systems of knowledge and their intersections. In addition to developing fluencies related to both general botany …
The Virginia Academy Of Science: A Scholarly Forum Over Decades For Students Of A Plant Ecologist, Stewart Ware
The Virginia Academy Of Science: A Scholarly Forum Over Decades For Students Of A Plant Ecologist, Stewart Ware
Virginia Journal of Science
As a newcomer to Virginia in 1968, I learned that annual meetings of the Virginia Academy of Science (VAS) were regarded as an excellent place for students to have their first experience giving a talk about their research to fellow scientists, and a place for faculty to get to know other Virginia scientists in their fields. Over the next four decades William and Mary students (undergraduate and graduate) and I were presenters or co-authors of 42 talks or posters at VAS annual meetings, 29 of them based on studies of plant ecology across Virginia. Two were talks by colleagues with …
A Flora Of The Silver Peak Range, Esmeralda County, Nevada, Peri Lee Pipkin
A Flora Of The Silver Peak Range, Esmeralda County, Nevada, Peri Lee Pipkin
CGU Theses & Dissertations
The Silver Peak Range and surrounding valleys lie east of the White Mountains of California in Esmeralda County, Nevada, in a transition between the Great Basin and Mojave Deserts. The flora of the region is influenced by the northern Mojave Desert to the south, White Mountains to the west, Great Basin Desert to the east and north, and additionally the Sierra Nevada to the west and Death Valley to the south. Prior to this study, the botanical diversity of the region had not been systematically investigated despite the area's need for urgent conservation action. A floristic survey over the course …
Vascular Plants Of The Caribou-Targhee National Forest And Curlew National Grassland In Southeastern Idaho, Western Wyoming, And Northern Utah, Michael Daines
Vascular Plants Of The Caribou-Targhee National Forest And Curlew National Grassland In Southeastern Idaho, Western Wyoming, And Northern Utah, Michael Daines
Electronic Theses & Dissertations
Due to a historical paucity of collections from and the absence of a comprehensive floristic treatment for parts of the Caribou-Targhee National Forest and Curlew National Grassland, an updated inventory for the area was needed. I present an annotated checklist of the vascular plants documented from the Caribou-Targhee National Forest and Curlew National Grassland. A total of new 3189 voucher specimens were collected for this project in 2021 and 2022. To compile the annotated checklist, I consulted both newly collected specimens and specimen data from online botanical databases. A total of 1557 taxa (species, subspecies, varieties, and hybrids), 1423 species …
A Foundational Population Genetics Investigation Of The Sexual Systems Of Solanum (Solanaceae) In The Australian Monsoon Tropics Suggests Dioecious Taxa May Benefit From Increased Genetic Admixture Via Obligate Outcrossing, Jason T. Cantley, Ingrid E. Jordon-Thaden, Morgan Roche, Daniel S. Hayes, Stephamie Kate, Christopher T. Martine
A Foundational Population Genetics Investigation Of The Sexual Systems Of Solanum (Solanaceae) In The Australian Monsoon Tropics Suggests Dioecious Taxa May Benefit From Increased Genetic Admixture Via Obligate Outcrossing, Jason T. Cantley, Ingrid E. Jordon-Thaden, Morgan Roche, Daniel S. Hayes, Stephamie Kate, Christopher T. Martine
Faculty Journal Articles
Solanum section Leptostemonum is an ideal lineage to test the theoretical framework regarding proposed evolutionary benefits of outcrossing sexual systems in comparison to cosexuality. Theoretically, non-cosexual taxa should support more genetic diversity within populations, experience less inbreeding, and have less genetic structure due to a restricted ability to self-fertilize. However, many confounding factors present challenges for a confident inference that inherent differences in sexual systems influence observed genetic patterns among populations. This study provides a foundational baseline of the population genetics of several species of different sexual systems with the aim of generating hypotheses of any factor—including sexual system—that influences …
A Most Surprising Fern: Serendipity And Browsing In Botanical Search, Douglas Tuers
A Most Surprising Fern: Serendipity And Browsing In Botanical Search, Douglas Tuers
Journal of the South Carolina Academy of Science
This article is a case study of botanical field work in the eastern United States in the early twentieth century. These cases will be analyzed as instances of browsing and serendipity. Browsing and serendipity have a rich literature in information science and this article will draw on this literature in order to better understand serendipity in botany. This article will show how botanical localities support browsing and serendipity for the botanists who search them. This article will also show how botanical institutions and botanists interface with localities in order to further support browsing and serendipity. As a whole this article …
Plant Community Patterns And A Flora Of Six Lower Mississippi River Islands, Grace Leia Mccartha
Plant Community Patterns And A Flora Of Six Lower Mississippi River Islands, Grace Leia Mccartha
Student Theses and Dissertations
Lower Mississippi River islands experience intense flood regimes that result in a supply of sediment and seeds from upstream. The islands are some of the last remaining floodplain habitats in the Delta region, and surveying their botanical diversity is important for learning about floodplain plant community structure. From June 2020 through December 2021, I conducted a flora of six Lower Mississippi River islands from Helena-West Helena, Arkansas, to Greenville, Mississippi. I collected 2,310 plant specimens for a total of 491 taxa, including five taxa not previously recorded in Arkansas and seven not previously recorded in Mississippi. From mid-July to late-August …
A Vascular Flora Of The Nopah Range, Inyo County, California, Carolyn J. Mills
A Vascular Flora Of The Nopah Range, Inyo County, California, Carolyn J. Mills
CGU Theses & Dissertations
The Nopah Range is an arid mountain range of the northern Mojave Desert located just east of Death Valley National Park in southeastern Inyo County, California. The study site is ca. 490 sq. km (189 sq. mi), with elevations ranging from 234 m (767 ft) to 1,949 m (6,394 ft) and includes the Nopah Range as well as portions of the California, Chicago, and Pahrump valleys. The objective of the study was to complete a specimen-based inventory of the vascular plants resulting in the production of an annotated checklist, and to assess the status of rare plant species and possible …
Investigating The Effects Of Disturbance And Competition On Establishment, Growth, And Reproduction Of The Endangered Ripariosida Hermaphrodita, Daniel Engelking
Investigating The Effects Of Disturbance And Competition On Establishment, Growth, And Reproduction Of The Endangered Ripariosida Hermaphrodita, Daniel Engelking
Theses and Dissertations (Comprehensive)
Ripariosida hermaphrodita (Virginia Mallow) is a perennial riparian plant with broad, maple-like leaves. It grows up to three meters high and is often found in large clonal patches, but sexually reproduces readily. While this plant may seem like a redoubtable competitor when growing in large colonies, it is declining across its range in North America. The only known occurrences in Canada are in southern Ontario. Prior to this study, no new populations had been recorded even though one of the known populations produces copious amounts of viable seed with potential to disperse. There are many hypotheses for its rarity, but …
Discerning Friend From Foe: Systematic Revision Of Cuscuta L. Section Indecorae Using A Combined Ecological, Morphometric, And Phylogenetic Approach., Corey Burt
Theses and Dissertations (Comprehensive)
The genus Cuscuta (Dodder; Convolvulaceae) are obligate parasitic plants. In one clade known as section Indecorae, there are species which are considered pests that pose significant threats to agricultural crop production, while other species are rare or known only from historical records. Section Indecorae contains three species: C. coryli, C. warneri, and C. indecora (the latter with three infraspecific taxa: var. indecora, var. longisepala, and var. attenuata). The systematics of section Indecorae are not currently resolved. Cuscuta indecora has a long and complicated taxonomic history with many infraspecific varieties described, and …
Effect Of Soil Transplantation On Fungal Communities During Restoration, Thomas Luehl
Effect Of Soil Transplantation On Fungal Communities During Restoration, Thomas Luehl
All Master's Theses
Ectomycorrhizal fungi are integral parts of natural ecological systems that provide access to nutrients that would otherwise be unavailable by forming symbiotic relationships with plants. Relationships with ectomycorrhizal fungi are known to improve plant growth rate, increase plant resistance to pathogens, and improve survival. Current revegetation practices often ignore this relationship between fungi and plants. During the revegetation of the Interstate 90 Keechelus Lake wildlife overcrossing (Easton, WA), soil from forest sites adjacent to the restoration area were collected and used to inoculate a set of experimental plots to determine whether ectomycorrhizal fungi would become established in the plots and …
Winter Dynamics Of Storm Water Management Ponds And Winter Tolerance In Three Aquatic Plant Species, Patrick Strzalkowski
Winter Dynamics Of Storm Water Management Ponds And Winter Tolerance In Three Aquatic Plant Species, Patrick Strzalkowski
Theses and Dissertations (Comprehensive)
The vast majority of the research into the performance of stormwater management ponds (SWMPs) has been performed in warm regions or during the warmer seasons in temperate regions. It is presumed that SWMPs are inactive in the winter as any potential stormwater is trapped in snow and ice. The main goal of this thesis was to test this presumption and to study the dynamics and performance of three SWMPs during the winter. Remote water level loggers were installed into the three SWMPs and daily grab samples from the influents and effluents were taken and analyzed for total phosphorus (TP), chloride, …
The Collaboration Between Art And Botany, Hee So, Sierra Beecher
The Collaboration Between Art And Botany, Hee So, Sierra Beecher
Undergraduate Research Posters
Using past research from my work study with Dr. Beecher where a team of students focused on quantitative and diagnostic anatomies of salt marsh and beach grasses on the Atlantic coasts, I used the research collected and created vector-based diagrams that were easily readable for Biology students at VCU. These illustrations were used in a manuscript we have been preparing, which has been accepted by the “Castanea” scientific journal. During the research fellowship, I was able to design a poster that portrayed the benefits of collaboration between art and botany, and Dr. Beecher presented the poster at the ASPB conference …
Flora Of Doe Mountain Recreation Area, Johnson County, Tennessee, Benjamin Mccullough
Flora Of Doe Mountain Recreation Area, Johnson County, Tennessee, Benjamin Mccullough
Electronic Theses and Dissertations
A botanical inventory of Doe Mountain Recreation Area (DMRA) in northeastern Tennessee was conducted to help guide conservation-based management. A total of 484 species were found in DMRA, comprising 94 families, and 285 genera, 10 species listed in the state rare plant list, and 76 exotic species. Two species, Liatris virgata and Lycopodiella inundata, were new state records. Water in the Lycopodiella seep was an order of magnitude more acid than at other sites. An analysis of the wildland-urban interface showed that only 13% of the area was classified as uninhabited. The inventory-invasion index, introduced to quantify the relative …
West Virginia Herbaria: Status, Updates, And Plans, Pamela Puppo, Katharine Gregg, Donna Ford-Werntz, James Vanderhorst, Michelle Mabry, Jeremy Keene
West Virginia Herbaria: Status, Updates, And Plans, Pamela Puppo, Katharine Gregg, Donna Ford-Werntz, James Vanderhorst, Michelle Mabry, Jeremy Keene
Biological Sciences Faculty Research
The West Virginia (U.S.A.) Herbarium Curators met on December 1st, 2021, with the intent of sharing updates on the collections, fostering collaboration, learning from each other's experiences, and identifying priorities for the collections towards the future. This article presents a summary of the herbaria that were represented in this meeting.
Observing Gravitropism In Brassica Rapa Roots, Trang Ly, Maya O'Callagham, Lan Poeschl, Adil Saeed, George Zorn
Observing Gravitropism In Brassica Rapa Roots, Trang Ly, Maya O'Callagham, Lan Poeschl, Adil Saeed, George Zorn
Undergraduate Research Posters
The objective of this experiment is to observe the effect of gravitropism on the orientation of Brassica rapa (B. rapa) roots. Specifically, amyloplasts that reside at the bottom of root tips act as gravity sensors. As plants are disturbed from upright orientation, roots automatically grow according to the downward pull of gravity. It is hypothesized that as the angle of rotation increases, the angle of root growth is inversely proportional. Five plants containing four seeds of B. rapa were grown over the course of 10 days. Each plates, aside from the control, were rotated once 90°, 80°, and 270° to …
A Flora Of Coyote Ridge And Flat, Inyo County, California, Martin Purdy
A Flora Of Coyote Ridge And Flat, Inyo County, California, Martin Purdy
CGU Theses & Dissertations
California’s Sierra Nevada mountain range contains a disproportionate share of the state’s plant diversity and is one of the most floristically diverse regions of its size in the United States. The high Sierra Nevada, in particular, has been identified as an important center of species richness and endemism within California. Anthropogenic climate warming is expected to disproportionately affect mountain ecosystems, and models have predicted serious habitat contraction and extirpation for many alpine plant taxa. A specimen-based inventory of the vascular and non-vascular plants of Coyote Ridge and Flat was conducted to establish baseline data for one such sensitive alpine and …
Distribution Of Toxicity Of Plant Species In The Plant Family Sapindaceae (Sub-Family Hippocastanoideae), Vishvam Mehta
Distribution Of Toxicity Of Plant Species In The Plant Family Sapindaceae (Sub-Family Hippocastanoideae), Vishvam Mehta
Undergraduate Honors Thesis Projects
Maple leaf toxicosis is a lethal condition in which wilted leaves from the plant genus Acer are ingested by equines, leading to hemolytic anemia and methemoglobinemia. In prior studies, the toxicity of various Acer species was quantified, revealing a wide array of responses in terms of hemolysis and methemoglobin production. The object of this study, therefore, is to determine the toxicity of Acer’s closest relatives within the family Sapindaceae, specifically the four additional genera in the subfamily Hippocastanoideae. The information gained from this study will be used to understand the evolution of the toxins responsible for hemolysis and methemoglobin production. …
The Emma Cole Project: Reevaluating The Flora Of Grand Rapids, William Hofmann, Hayden Janssen, Martin Vanderschoot, Garrett Crow, Dave Warners
The Emma Cole Project: Reevaluating The Flora Of Grand Rapids, William Hofmann, Hayden Janssen, Martin Vanderschoot, Garrett Crow, Dave Warners
Student Papers and Reports
In 1901, botanist and teacher Emma Cole published an account of all the vascular plants in the Grand Rapids area, which is the most comprehensive documentation of the flora in the area today. The vicinity of Grand Rapids has been developed significantly since then, and with it the surrounding natural spaces have also been greatly altered. Over the past 7 years, Calvin University’s Emma Cole Project has been inventorying the flora of greater Grand Rapids and comparing modern plant life with the flora during Cole’s time 120 years ago. This project strives to both verify species’ presence around Grand Rapids …