Arkansas Turfgrass Report 2009,
2010
University of Arkansas, Fayetteville
Arkansas Turfgrass Report 2009, Douglas Karcher, Aaron Patton, Michael Richardson
Arkansas Agricultural Experiment Station Research Series
No abstract provided.
Genomic Perspectives On Evolution In Bracken Fern,
2010
Utah State University
Genomic Perspectives On Evolution In Bracken Fern, Joshua P. Der
All Graduate Theses and Dissertations, Spring 1920 to Summer 2023
The fern genus Pteridium comprises a number of closely related species distributed throughout the world. Collectively they are called bracken ferns and have historically been treated as a single species, Pteridium aquilinum. Bracken is notorious as a toxic weed that colonizes open fields and poisons livestock. Bracken is also easily cultured and has become one of the most intensively studied ferns. Bracken has been used as a model system for the study of the fern life cycle, fern gametophyte development, the pheromonal mechanism of sex determination, toxicology, invasion ecology, and climate change. This dissertation places bracken within a global …
2009 Vascular Plant Surveys In The Central Niobrara River Valley, Nebraska,
2010
University of Nebraska - Lincoln
2009 Vascular Plant Surveys In The Central Niobrara River Valley, Nebraska, Mary Ann Feist, Paul B. Marcum, Loy R. Philippe, Brenda Molano-Flores, Valerie Sivicek
Nebraska Game and Parks Commission: White Papers, Conference Presentations, and Manuscripts
The Niobrara River Valley in northern Nebraska is an important floristic area. It harbours a number of bryophyte, vascular plant, and animal species that are rarely found in close proximity to one another. Many of these species are more typical farther to the north, east, or west, but over time as climates have changed, have come to settle together in this valley (Kaul et al. 1988). The central Niobrara River Valley may be the most botanically diverse region of Nebraska. Approximately 580 of Nebraska’s roughly 2,000 vascular plant species have been documented for the Niobrara Valley Preserve (Schneider et al. …
Biomechanical And Morphological Changes In Leaf Abscission Zones During The Ontogeny Of Kalanchoe Pinnatum,
2010
Butler University
Biomechanical And Morphological Changes In Leaf Abscission Zones During The Ontogeny Of Kalanchoe Pinnatum, Jillian Hodge
Undergraduate Honors Thesis Collection
Kalanchoe pinnatum is able to asexually reproduce with the help of its leaves. In K. pinnatum, embryos are embedded in the notches of a leafs margin. Through the process of abscission, when the plant is disturbed a leaf with embryos falls to the ground and the embryos grow into new plants. Thus, as leaves mature, they face conflicting functional demands to stay on the plant and continue their role in photosynthesis or fall off the plant and asexually reproduce. To examine if there is a point in the leafs development where abscission occurs more readily, I examined breaking strength in …
Claytonia Virginica L.,
2010
Eastern Illinois University
Viola Canadensis L.,
2010
Eastern Illinois University
Section Abstracts: Botany,
2010
Old Dominion University
Section Abstracts: Botany
Virginia Journal of Science
Abstracts of the Botany Section for the 88th Annual Meeting of the Virginia Academy of Science, May 20-21, 2010. James Madison University, Harrisonburg, Virginia.
One Lump Or Two: How Many Wild Gingers Inhabit North America?,
2010
University of Richmond
One Lump Or Two: How Many Wild Gingers Inhabit North America?, W. John Hayden
Biology Faculty Publications
Depending on which source one consults, the answer is either one (Asarum), or two (Asarum + Hexastylis). It is a classic lump-or-split situation. To mention just a few sources, Fernald (1950) and Gleason & Cronquist (1991) lump all the wild gingers into a single genus, whereas Radford et al. (1968), the Digital Atlas of the Virginia Flora (Virginia Botanical Associates 2010), and the Flora of North America (Whitmore & Gaddy 1997; Whitmore et al. 1997) split Asarum and Hexastylis apart. Deference to authority is a poor way to assess any scientific question, and for these wild …
Mojave Applied Ecology Notes Spring 2010,
2010
University of Nevada, Las Vegas
Mojave Applied Ecology Notes Spring 2010, Anna San, Donovan J. Craig, Lindsay P. Chiquoine, Scott R. Abella, E. Cayenne Engel, Christina L. Lund, Jessica E. Spencer, Edward P. Weber Ph.D, Jill E. Craig
Mojave Applied Ecology Notes
Seed removal rates of Sahara mustard by rodents and ants, Mojave Desert Network exotic invasive inventory, gypsum roadside disturbance restoration update, new paper out on post-fire plant establishment, UNLV establishes school of environmental and public affairs
The Green Revolution Of The 1960'S And Its Impact On Small Farmers In India,
2010
University of Nebraska-Lincoln
The Green Revolution Of The 1960'S And Its Impact On Small Farmers In India, Kathryn Sebby
Department of Environmental Studies: Undergraduate Student Theses
The Green Revolution was initiated in the 1960’s to address the issue of malnutrition in the developing world. The technology of the Green Revolution involved bio-engineered seeds that worked in conjunction with chemical fertilizers and heavy irrigation to increase crop yields. The technology was readily adopted in many stated in India and for some was a great success. However, there were many farmers who could not afford the inputs necessary to participate in the Green Revolution and gaps between social classes widened as wealthy farmers got wealthier and poor farmers lagged behind. This paper discusses how small farmers were affected …
A Potential Plan Of Action For Emerald Ash Borer In Nebraska,
2010
University of Nebraska-Lincoln
A Potential Plan Of Action For Emerald Ash Borer In Nebraska, Lee Wheeler
Department of Environmental Studies: Undergraduate Student Theses
Abstract Emerald Ash Borer (Agrilus planipennis) (EAB) is an invasive insect pest. It feeds on the cambium tissues of ash tree species. It was first discovered in the United States in 2002 in Detroit, Michigan. Their effects on ash trees are deadly, and it is quickly spreading across the Midwest. Nebraska has not yet been invaded, but confirmed findings continue getting closer and closer. The major problem facing Nebraskans, with regards to EAB, is how to begin preparations to prevent a dramatic economic loss when an infestation does occur. So, to address this problem, I have conducted street and park …
Sfa Gardens Newsletter, Spring 2010,
2010
Stephen F. Austin State University
Sfa Gardens Newsletter, Spring 2010, Sfa Gardens, Stephen F. Austin State University
SFA Gardens Newsletters
No abstract provided.
Ecological And Genetic Status Of The Purple Pitcher Plant, Sarracenia Purpurea L., In Maryland And Virginia,
2010
Old Dominion University
Ecological And Genetic Status Of The Purple Pitcher Plant, Sarracenia Purpurea L., In Maryland And Virginia, Philip M. Sheridan
Biological Sciences Theses & Dissertations
Sarracenia purpurea is a rare wetland plant in Virginia and a threatened species in Maryland, with two potential subspecies in the region. I utilized restriction fragments from the intron of the chalcone synthase gene to compare S. purpurea populations and determine whether the subspecies concept was supported. I performed a census of existing populations, compiled all known historical data on the species, and investigated the reasons for the species demise and predicted dates of extinction. Bloom phenology was examined to see if climate change may have influenced bloom period. Soil, vegetation, and climatic information was obtained to determine if taxonomic …
Interisland Variability Of Dune Plant Community Structure On Virginia's Barrier Islands,
2010
Old Dominion University
Interisland Variability Of Dune Plant Community Structure On Virginia's Barrier Islands, Justin K. Shafer
Biological Sciences Theses & Dissertations
The barrier islands of the Virginia Coast Reserve LTER site provide an opportunity to study interisland variability of dune plant communities. My research focused on the variation in biomass and diversity of communities among islands and dune positions. Grassy dunes of young, intermediate and old age were sampled on Smith, Hog, and Parramore Islands. Aboveground biomass was obtained from harvest plots, and roots were extracted from cores. Data were collected on depth to groundwater and total soil nitrogen. Variation in mean aboveground biomass was evident among the islands with the highest values on Hog Island, followed by Smith, then Parramore …
Claytonia Virginica L.,
2010
Eastern Illinois University
Combining Local- And Large-Scale Models To Predict The Distributions Of Invasive Plant Species,
2010
Connecticut College
Combining Local- And Large-Scale Models To Predict The Distributions Of Invasive Plant Species, Chad C. Jones, Steven A. Acker, Charles B. Halpern
Botany Faculty Publications
Habitat-distribution models are increasingly used to predict the potential distributions of invasive species and to inform monitoring. However, these models assume that species are in equilibrium with the environment, which is clearly not true for most invasive species. Although this assumption is frequently acknowledged, solutions have not been adequately addressed. There are several potential methods for improving habitat-distribution models. Models that require only presence data may be more effective for invasive species, but this assumption has rarely been tested. In addition, combining modeling types to form ‘ensemble’ models may improve the accuracy of predictions. However, even with these improvements, models …
Why Some Stems Are Red: Cauline Anthocyanins Shield Photosystem Ii Against High Light Stress,
2010
DePauw University
Why Some Stems Are Red: Cauline Anthocyanins Shield Photosystem Ii Against High Light Stress, Dana A. Dudle
Biology Faculty publications
Red-stemmed plants are extremely common, yet the functions of cauline anthocyanins are largely unknown. The possibility that photoabatement by anthocyanins in the periderm reduces the propensity for photoinhibition in cortical chlorenchyma was tested for Cornus stolonifera. Anthocyanins were induced in green stems exposed to full sunlight. PSII quantum yields (ФPSII) and photochemical quenching coefficients were depressed less in red than in green stems, both under a light ramp and after prolonged exposures to saturating white light. These differences were primarily attributable to the attenuation of PAR, especially green/yellow light, by anthocyanins. However, the red internodes also …
The Role Of Adaptive Trans-Generational Plasticity In Biological Invasions Of Plants,
2010
University of South Carolina - Aiken
The Role Of Adaptive Trans-Generational Plasticity In Biological Invasions Of Plants, Andrew R. Dyer, Cynthia S. Brown, Erin K. Espeland, John K. Mckay, Harald Meimberg, Kevin J. Rice
Faculty Publications
High-impact biological invasions often involve establishment and spread in disturbed, high-resource patches followed by establishment and spread in biotically or abiotically stressful areas. Evolutionary change may be required for the second phase of invasion (establishment and spread in stressful areas) to occur. When species have low genetic diversity and short selection history, within-generation phenotypic plasticity is often cited as the mechanism through which spread across multiple habitat types can occur. We show that trans-generational plasticity (TGP) can result in pre-adapted progeny that exhibit traits associated with increased fitness both in high-resource patches and in stressful conditions. In the invasive sedge, …
Research Poster: Water Source Partitioning For Shrubland Transpiration Using Innovative Field Methods,
2010
University of Nevada, Las Vegas
Research Poster: Water Source Partitioning For Shrubland Transpiration Using Innovative Field Methods, Amanda Wagner, Dale A. Devitt, Michael Young, Matthew S. Lachniet, Jeremy Koonce, Brian M. Bird
2010 Annual Nevada NSF EPSCoR Climate Change Conference
Research poster
Research Poster: Biotic Responses To Climate Change In The Mojave Desert: Floristics,
2010
College of Southern Nevada
Research Poster: Biotic Responses To Climate Change In The Mojave Desert: Floristics, Patrick Leary, David Charlet
2010 Annual Nevada NSF EPSCoR Climate Change Conference
Research poster
