Unraveling Ancient Lake Conditions Through Eunotia Identification,
2022
Connecticut College
Unraveling Ancient Lake Conditions Through Eunotia Identification, Erik Duffy Oddsund
Botany Honors Papers
No abstract provided.
The Development Of A Photographic Atlas Of Plant Adaptations For Pollination,
2022
University of Northern Iowa
The Development Of A Photographic Atlas Of Plant Adaptations For Pollination, Bethany Van Dusseldorp
Honors Program Theses
Plants have biotic, abiotic, or both biotic and abiotic adaptations for pollination, depending on how they are structured and the attraction between the plant and pollinator. The main focus for this project was biotic adaptations for pollination, and how various plants are specifically structured for the insect, bird, or mammal to pick up the pollen and carry it to the next plant. Documentation, using image/focus stacking and macro photography, was done of the structures of various plants from the University of Northern Iowa (UNI) Botanical Center to support the reason for why plants are structured the way they are. While …
Forecasting The Outcomes Of Managing A Rare Endemic Plant At Its Elevational Limit Under Climate Change Scenarios,
2022
Cal Poly Humboldt
Forecasting The Outcomes Of Managing A Rare Endemic Plant At Its Elevational Limit Under Climate Change Scenarios, Ethan Reibsome
Cal Poly Humboldt theses and projects
Lupinus constancei (Lassics lupine) is an exceptionally rare forb with a population that in 2020 consisted of 1,300 individuals located on two adjacent mountaintops in northwestern California, USA. Past work has demonstrated the species is threatened by high levels of seed predation by small mammals, which is likely the result of fire exclusion and the subsequent vegetation encroachment that both increases small mammal habitat and directly reduces suitable habitat for the species. Because of this, active management through caging of reproductive individuals to reduce seed consumption has been conducted every year since 2003. In addition, growing season temperatures have increased …
Understanding Morphological Responses Of Typha (Cattail) Species To Nutrient Pollution,
2022
University of Northern Iowa
Understanding Morphological Responses Of Typha (Cattail) Species To Nutrient Pollution, Anna Marie Shapiro
Dissertations and Theses @ UNI
In the Midwestern United States, Typha x glauca is a hybrid of the native Typha latifolia and the non-native Typha angustifolia. Typha x glauca is considered invasive, and it is dominating Typha latifolia when they co-occur. Wetlands in the Midwest face nutrient pollution, due to fertilization used within the agricultural industry. Wetlands are nutrient sinks, which store the increased levels of nitrogen and phosphorus. These nutrients are known to increase Typha growth. Within this thesis, it was hypothesized that an increase of nitrogen in the wetland may increase the width of Typha leaves, making it difficult to distinguish the …
Nikolai Ivanovich Vavilov,
2022
Humboldt State University
Purposeful Use Of Poisonous Plants,
2022
Humboldt State University
Purposeful Use Of Poisonous Plants, James P. Smith Jr
Botanical Studies
No abstract provided.
Mechanically Injurious Plants,
2022
Humboldt State University
Mechanically Injurious Plants, James P. Smith Jr
Botanical Studies
No abstract provided.
Poisonous Plants: A Glossary Of Commonly Used Terms,
2022
Humboldt State University
Poisonous Plants: A Glossary Of Commonly Used Terms, James P. Smith Jr
Botanical Studies
No abstract provided.
Second Twenty-Five Year Index: Volumes 26–50, 1994–2018,
2022
Editor, The Prairie Naturalist
Second Twenty-Five Year Index: Volumes 26–50, 1994–2018, Jane E. Austin
The Prairie Naturalist
The first 50 years of the Prairie Naturalist reside on the shelves of libraries and personal collections. The articles and notes published over those years provide invaluable knowledge about Great Plains biota, communities, conservation, and landscape ecologies. Awareness of the wealth of information in those 50 print volumes has been limited, relying on references from other published papers or the limited number of articles that have been made available online by authors. This index serves as resource for individuals to digitally tap into the information published since 1994. This index, together with the first 25-year index, serves to complement the …
Review Of Loon Lessons: Uncommon Encounters With The Great Northern Diver, By James D. Paruk,
2022
Canadian Wildlife Service, Gatineau, Quebec
Review Of Loon Lessons: Uncommon Encounters With The Great Northern Diver, By James D. Paruk, Kristin Bianchini
The Prairie Naturalist
Gavia immer Brunnich (Common Loon) is a bird that has captivated bird watchers, wildlife enthusiasts, campers, cottagers, and others interested in the natural world for centuries. The loon also features prominently in Native American mythology. For many, the loon symbolizes the wildness of the north, and it is often used as a sentinel of lake health. Indeed, the Common Loon has inspired a wealth of literature, both scientific and popular, describing this species’ ecology, behavior, and fitness in the face of environmental changes. To this literature, Loon Lessons: Uncommon Encounters with the Great Northern Diver adds a complete and accurate …
Characterization Of Salt And Drought Tolerance In Sunflower (Helianthus Annuus L.),
2022
University of Nebraska-Lincoln
Characterization Of Salt And Drought Tolerance In Sunflower (Helianthus Annuus L.), Sevgi Saylak
Department of Agronomy and Horticulture: Dissertations, Theses, and Student Research
Consequent to the increasing world population, food sources are needed to be increased to meet the nutritional needs. However, due to natural processes and agricultural activities, the most destructive environmental factors that limit crop production, soil salinity, and drought-exposed areas are growing. As one of the major oilseed crops, sunflower (Helianthus annuus L.), is considered to be moderately tolerant to salt and drought. Although it can grow in arid to semi-arid regions, increasing salinity and drought might adversely affect sunflower production. This study aimed to investigate several sunflower germplasms' morphological responses to salt and drought stresses. For this purpose, …
Identification Of Beneficial And Detrimental Bacteria Impacting
Sorghum Responses To Drought Using Multi-Scale And Multisystem Microbiome Comparisons,
2022
Donald Danforth Plant Science Center, St. Louis, MO, USA.
Identification Of Beneficial And Detrimental Bacteria Impacting Sorghum Responses To Drought Using Multi-Scale And Multisystem Microbiome Comparisons, Mingsheng Qi, Jeffrey C. Berry, Kira W. Veley, Lily O'Connor, Omri M. Finkel, Isai Salas-González, Molly Kuhs, Julietta Jupe, Emily Holcomb, Tijana Glavina Del Rio, Cody Creech, Peng Liu, Susannah G. Tringe, Jeffery L. Dangl, Daniel P. Schachtman, Rebecca S. Bart
Department of Agronomy and Horticulture: Faculty Publications
Drought is a major abiotic stress limiting agricultural productivity. Previous field-level experiments have demonstrated that drought decreases microbiome diversity in the root and rhizosphere. How these changes ultimately affect plant health remains elusive. Toward this end, we combined reductionist, transitional and ecological approaches, applied to the staple cereal crop sorghum to identify key root-associated microbes that robustly affect drought-stressed plant phenotypes. Fifty-three Arabidopsis-associated bacteria were applied to sorghum seeds and their effect on root growth was monitored. Two Arthrobacter strains caused root growth inhibition (RGI) in Arabidopsis and sorghum. In the context of synthetic communities, Variovorax strains were able to …
Temporal Changes In The Nutrient Content Of Cattle Dung In The Nebraska Sandhills Ecosystem,
2022
University of Nebraska - Lincoln
Temporal Changes In The Nutrient Content Of Cattle Dung In The Nebraska Sandhills Ecosystem, Amanda Shine, Martha Mamo, Gandura O. Abagandura, Walter Schacht, Jerry Volesky
Department of Agronomy and Horticulture: Faculty Publications
Dung excreted by cattle composes a significant portion of the nutrient inputs in a grazed ecosystem and can have wide-ranging effects on soil properties and vegetation. However, little research has been conducted on the nutrient dynamics of excreted dung in situ that has not been disturbed prior to field sampling. In this study, we analyzed 294 dung pats (1–24 days old) collected from a Nebraska Sandhills meadow to determine water-extractable organic carbon (WEOC), water-extractable nitrogen (WEN), water-extractable phosphorus (WEP), and percent dry matter (DM) changes over time. In addition, we investigated if sample handling - frozen storage – and the …
Determinants Of Population Genetic Structure In Chamaecrista Fasciculata (Michx.) Greene (Fabaceae) In The Southeastern United States,
2022
Old Dominion University
Determinants Of Population Genetic Structure In Chamaecrista Fasciculata (Michx.) Greene (Fabaceae) In The Southeastern United States, Mahboubeh Hosseinalizadeh Nobarinezhad, Lisa E. Wallace
Biological Sciences Faculty Publications
Chamaecrista fasciculata is a widely distributed, phenotypically variable species in the eastern U.S. Whereas studies have demonstrated genetic structure and local adaptation in northern areas of its distribution, there has been no comparison of genetic variability among populations at the southern extent where phenotypic variation is more complex. We characterized genetic variation at 14 microsatellite loci for populations in Mississippi and Alabama and compared this to variation in a phenotypic trait, leaf pubescence. Geographic distance, climatic variables, and elevation were evaluated as factors to explain the observed patterns of genetic diversity. A significant amount of variation (19%) resided among populations, …
Wyoming’S Wild Horse Ranch: History And Description Of A Socio-Ecological Experiment,
2022
Wild Horse Preservation Society on the Wild Horse Ranch
Wyoming’S Wild Horse Ranch: History And Description Of A Socio-Ecological Experiment, Alex Sas-Jaworsky, John Derek Scasta
Human–Wildlife Interactions
The growing population of free-roaming horses (Equus ferus caballus) on western public rangelands has necessitated that federal agencies, such as the Bureau of Land Management (BLM) and U.S. Forest Service, develop novel approaches to curb growth including reproduction management. However, bureaucracy has hindered effective research and application of horse management on public lands and examples on private lands may present new solutions. Here we present the history and current population management strategy for the Wild Horse Ranch (WHR) located in southeastern Wyoming, USA, as an example of an ongoing private entity managing horses. Prior to 1985, this ~6,000-ha …
A Micro-Environmental System For Fast Propagation Of Blueberries,
2022
Michigan Technological University
A Micro-Environmental System For Fast Propagation Of Blueberries, Tristan Bonifield
Dissertations, Master's Theses and Master's Reports
The demand for blueberries has continued to rise over the decades as its popularity has spread in North America and the world. Propagation of new plants to supply new farms and individuals is needed to meet that demand. Here we report the invention of a closed system that was tested by examining the growth of the cuttings (plant length, rooting, and root length) after a one-month period in both the proposed system and a traditional mist system. The proposed system showed a few statistically significant advantages over the traditional mist system with no consistent trend, besides a decrease in wilting …
Documenting The Rapidly Expanding Distribution Of Invasive Ravenna Grass (Tripidium Ravennae) Eastern In Kansas,
2022
Pittsburg State University
Documenting The Rapidly Expanding Distribution Of Invasive Ravenna Grass (Tripidium Ravennae) Eastern In Kansas, Rachel A. Styers
Electronic Theses & Dissertations
Invasive species cause significant ecological losses in the United States where they cost approximately $21 billion dollars a year to manage (Fantle-Lepczyk et al., 2022). Early detection of new invasive species, coupled with a rapid response of management efforts, can help to slow the ecological and economic impacts caused by these habitat invaders. Tripidium ravennae (L.) H. Scholz (or Ravenna grass) is a tall, robust, cespitose grass known to occur in Kansas, although its distribution remained poorly documented prior to this study. Given its known invasive tendencies, it has been declared noxious in at least six US states. Coupled with …
A New Perspective When Examining Maize Fertilizer Nitrogen Use Efficiency, Incrementally,
2022
USDA, Agricultural Research Service
A New Perspective When Examining Maize Fertilizer Nitrogen Use Efficiency, Incrementally, Newell R. Kitchen, Curtis J. Ransom, James S. Schepers, Jerry L. Hatfield, Raymond Massey, Scott T. Drummond
Department of Agronomy and Horticulture: Faculty Publications
For maize (Zea mays L.), nitrogen (N) fertilizer use is often summarized from field to global scales using average N use efficiency (NUE). But expressing NUE as averages is misleading because grain increase to added N diminishes near optimal yield. Thus, environmental risks increase as economic benefits decrease. Here, we use empirical datasets obtained in North America of maize grain yield response to N fertilizer (n = 189) to create and interpret incremental NUE (iNUE), or the change in NUE with change in N fertilization. We show for those last units of N applied to reach economic optimal N …
First Plant Cell Atlas Symposium Report,
2022
Carnegie Institution for Science, Stanford, California,
First Plant Cell Atlas Symposium Report, Selena L. Rice, Elena Lazarus, Christopher Anderton, Kenneth Birnbaum, Jenniofer Brophy, Benjamin Cole, Diane Dickel, David Ehrhardt, Noah Fahlgren, Margaret Frank, Elizabeth Haswell, Shao-Shan Carol Huang, Samuel Leiboff, Marc Libault, Marisa S. Otegui, Nicholas Provart, R. Glen Uhrig, Seung Y. Rhee, The Plant Cell Atlas Consortium
Department of Agronomy and Horticulture: Faculty Publications
The Plant Cell Atlas (PCA) community hosted a virtual symposium on December 9 and 10, 2021 on single cell and spatial omics technologies. The conference gathered almost 500 academic, industry, and government leaders to identify the needs and directions of the PCA community and to explore how establishing a data synthesis center would address these needs and accelerate progress. This report details the presentations and discussions focused on the possibility of a data synthesis center for a PCA and the expected impacts of such a center on advancing science and technology globally. Community discussions focused on topics such as data …
A Non-Destructive Approach For Measuring Rice Panicle-Level Photosynthetic Responses Using 3d-Image Reconstruction,
2022
University of Nebraska-Lincoln
A Non-Destructive Approach For Measuring Rice Panicle-Level Photosynthetic Responses Using 3d-Image Reconstruction, Jaspinder Singh Dharni, Balpreet Kaur Dhatt, Puneet Paul, Tian Gao, Tala Awada, Paul Staswick, Jason Hupp, Hongfeng Yu, Harkamal Walia
Department of Agronomy and Horticulture: Faculty Publications
Our understanding of the physiological response of rice inflorescence (panicle) to environmental stresses is limited by the challenge of accurately determining panicle photosynthetic parameters and their impact on grain yield. This is primarily due to lack of a suitable gas exchange methodology for panicles, as well as non-destructive methods to accurately determine panicle surface area. To address these challenges, we have developed a custom panicle gas exchange cylinder compatible with the LiCor 6800 Infra-red Gas Analyzer. Accurate surface area measurements were determined with a 3D panicle imaging platform to normalize the panicle-level photosynthetic measurements. We observed differential responses in both …
