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Daily To Seasonal Moisture Signals Present In Sub-Annual Tree-Ring Data, Ian Howard 2019 University of Arkansas, Fayetteville

Daily To Seasonal Moisture Signals Present In Sub-Annual Tree-Ring Data, Ian Howard

Theses and Dissertations

In recent decades, there has been an increase in the development of sub-annual earlywood (EW) and latewood (LW) width tree-ring chronologies that have been used to make long-term inferences about discrete seasonal moisture variability for different regions of North America. This doctoral research developed a new network of EW, LW, and adjusted latewood (LWa) tree-ring chronologies from the western Great Plains. These chronologies were used to reconstruct 300+ years of spring and summer moisture variability over the northern and southern Plains. The reconstructions document new information about the long-term seasonal climate history of the Great Plains, including the unusual nature ...


Improving Conservation Of Declining Young Forest Birds Through Adaptive Management, Anna Buckardt Thomas 2019 University of Maine

Improving Conservation Of Declining Young Forest Birds Through Adaptive Management, Anna Buckardt Thomas

Electronic Theses and Dissertations

Early successional forest and shrubland habitats are collectively called young forest. Changes in disturbance regimes and land use conversion resulted in declines of young forest and associated wildlife across eastern North America. Conservation of declining young forest birds relies on the maintenance and creation of young forest habitats used for breeding. American Woodcock (AMWO; Scolopax minor) and Golden-winged Warbler (GWWA; Vermivora chrysoptera) are two declining young forest species. Conservation plans for both species use an adaptive management framework, which is an iterative process of planning, management actions, and monitoring and evaluation, in the context of species conservation goals. Adaptive management ...


The Transesterification Of Hickory Nuts Into Biodiesel Fuel, Hannah Trauger, Madilynn Dewell, Jahida A. Mendoza 2019 Stephen F Austin State University

The Transesterification Of Hickory Nuts Into Biodiesel Fuel, Hannah Trauger, Madilynn Dewell, Jahida A. Mendoza

Undergraduate Research Conference

• Biodiesel fuels can be produced from a fat and an alcohol via transesterification

• Hickory nuts have a high fat content (~60 % by weight)

• Can nuts from shagbark hickory (Carya ovata) be used to produce a biodiesel fuel using existing acidcatalyzed transesterification methods?


Extraction And Quantification Of Hydrolyzable Tannins In Acorns From Different Species Of Oak Trees (Quercus Spp.), Sarah Browning, Marshall E. Woodruff 2019 Stephen F Austin State University

Extraction And Quantification Of Hydrolyzable Tannins In Acorns From Different Species Of Oak Trees (Quercus Spp.), Sarah Browning, Marshall E. Woodruff

Undergraduate Research Conference

Do white-tailed deer (Odocoileus virginianus) prefer to eat certain types of acorns based on tannin content?

Hydrolyzable tannins consist of gallate groups connected via ester linkages to a carbohydrate (D-glucose)

The Prussian Blue method was used to determine hydrolyzable tannin content


Microbial Abundance And The Pattern Of Escherichia Coli Antibiotic Sensitivity And Resistance In Deer Creek And The Potential Impact Of A Veterinarian Hospital’S Input, Sarah Boxer, tim gsell 2019 Governors State University

Microbial Abundance And The Pattern Of Escherichia Coli Antibiotic Sensitivity And Resistance In Deer Creek And The Potential Impact Of A Veterinarian Hospital’S Input, Sarah Boxer, Tim Gsell

GSU Research Day

The gram-negative bacteria, E. coli, is an indicator of fecal input for both point and non-point source origin. The veterinarian hospital located on Deer Creek may contribute to high antibiotic levels, which are known to select for resistant strains of bacteria living in impacted waters. The water running north of the veterinarian hospital was considered potentially antibiotic influenced as it was downstream of the site. The origin of the stream and sites upstream from the hospital were considered influent water. Sediments were also collected from these sites to determine if more long term resident E. coli were present with elevated ...


Assessment Of Soil Particle Size Distribution Under Four Land Covers In Nachusa Grasslands Of Northern Illinois, Reni Truhtcheva Owikoti, Diana Acosta, Markeia Scruggs, Xiaoyong Chen 2019 Biology Program, CAS, Governors State University

Assessment Of Soil Particle Size Distribution Under Four Land Covers In Nachusa Grasslands Of Northern Illinois, Reni Truhtcheva Owikoti, Diana Acosta, Markeia Scruggs, Xiaoyong Chen

GSU Research Day

Soil particle composition is one of the main physical properties of soil that affects soil fertility and quality. The fractal dimension of soil particle size distribution (PSD) can be used to quantitatively evaluate the particle composition of soils. Land cover change with corresponding management practices is recognized as one important driving force affecting soil PSD alterations. The objective of this project was to determine the changes in soil PSD under four plant covers (Woodland, Wetland, Prairie, and Savannah) at the Nachusa Grasslands in North Illinois. The soil PSD was determined by their settling rates in an aqueous solution using hydrometer ...


Comparing Methods And Technologies For Assessing Vertical Size Distribution Of American Beech Leaves (Fagus Grandifolia Ehrh), Adeline Casali 2019 University of Southern Maine

Comparing Methods And Technologies For Assessing Vertical Size Distribution Of American Beech Leaves (Fagus Grandifolia Ehrh), Adeline Casali

Thinking Matters Symposium

The American beech (Fagus grandifolia Ehrh) is a deciduous species that occurs throughout the eastern United States and Southeast Canada. This species grows 20–35 meters in height and is tolerant of a range of environmental conditions. Because beech occurs over a wide geographical and ecological range, it is ideal for comparative studies between sites or environmental conditions. Here we report on the relative size of beech leaves collected from different heights above the forest floor. We then determine if morphological trends between upper and lower canopy were consistent between live fall leaves and senesced mid-winter leaves that remain attached ...


Mapping Mountain Peatlands And Wet Meadows Using Multi-Date, Multi-Sensor Remote Sensing In The Cordillera Blanca, Peru, Rodney Chimner, Laura Bourgeau-Chavez, Sarah L. Grelik, John A. Hribljan, Ana Maria Planas Clarke, Molly Polk, Erik Lilleskov, Beatriz Fuentealba 2019 Michigan Technological University

Mapping Mountain Peatlands And Wet Meadows Using Multi-Date, Multi-Sensor Remote Sensing In The Cordillera Blanca, Peru, Rodney Chimner, Laura Bourgeau-Chavez, Sarah L. Grelik, John A. Hribljan, Ana Maria Planas Clarke, Molly Polk, Erik Lilleskov, Beatriz Fuentealba

School of Forest Resources and Environmental Science Publications

Wetlands (called bofedales in the Andes of Peru) are abundant and important components of many mountain ecosystems across the globe. They provide many benefits including water storage, high quality habitat, pasture, nutrient sinks and transformations, and carbon storage. The remote and rugged setting of mountain wetlands creates challenges for mapping, typically leading to misclassification and underestimates of wetland extent. We used multi-date, multi-sensor radar and optical imagery (Landsat TM/PALSAR/RADARSAT-1/SRTM DEM-TPI) combined with ground truthing for mapping wetlands in Huascarán National Park, Peru. We mapped bofedales into major wetland types: 1) cushion plant peatlands, 2) cushion plant wet ...


A Novel Approach To Understanding Bird Communities Using Informed Diversity Estimates At Local And Regional Scales In Northern California And Southern Oregon, Jared D. Wolfe, John D. Alexander, Jamie L. Stephens, C. John Ralph 2019 Michigan Technological University

A Novel Approach To Understanding Bird Communities Using Informed Diversity Estimates At Local And Regional Scales In Northern California And Southern Oregon, Jared D. Wolfe, John D. Alexander, Jamie L. Stephens, C. John Ralph

School of Forest Resources and Environmental Science Publications

Assessment and preservation of biodiversity has been a central theme of conservation biology since the discipline's inception. However, when diversity estimates are based purely on measures of presence–absence, or even abundance, they do not directly assess in what way focal habitats support the life history needs of individual species making up biological communities. Here, we move beyond naïve measures of occurrence and introduce the concept of “informed diversity” indices which scale estimates of avian species richness and community assemblage by two critical phases of their life cycle: breeding and molt. We tested the validity of the “informed diversity ...


Linking Tree Growth Rate, Damage Repair, And Susceptibility To A Genus-Specific Pest Infestation, Kayla Boyes, Kathryn G. Hietala-Henschell, Alexander P. Barton, Andrew J. Storer, Jordan M. Marshall 2019 Purdue University

Linking Tree Growth Rate, Damage Repair, And Susceptibility To A Genus-Specific Pest Infestation, Kayla Boyes, Kathryn G. Hietala-Henschell, Alexander P. Barton, Andrew J. Storer, Jordan M. Marshall

School of Forest Resources and Environmental Science Publications

Pest preference and subsequent susceptibility of a host individual is likely related to previous growth patterns in that host. Emerald ash borer (Agrilus planipennis Fairmaire) is a pestiferous beetle introduced to North America from Asia. While all species of ash are susceptible to attack, some individual trees appear to survive infestation. We selected ash trees in southeastern Michigan, collected cores and categorized trees as high tolerance to emerald ash borer attack (high overall health, low crown dieback), low tolerance (low overall health, high crown dieback) and intermediate tolerance (in-between the other categories). We artificially wounded trees and measured wound closure ...


Improving Access To Clean Water Through Service Learning, Rachel E. Gehr, Tolu Odimayomi, Carolina Tornesi MacKinnon 2019 Purdue University

Improving Access To Clean Water Through Service Learning, Rachel E. Gehr, Tolu Odimayomi, Carolina Tornesi Mackinnon

Engagement & Service-Learning Summit: Connecting Through Listening & Scholarship

No abstract provided.


Scientists, Uncertainty And Nature, An Analysis Of The Development, Implementation And Unintended Consequences Of The Northwest Forest Plan, Gilbert David Miller 2019 Portland State University

Scientists, Uncertainty And Nature, An Analysis Of The Development, Implementation And Unintended Consequences Of The Northwest Forest Plan, Gilbert David Miller

Dissertations and Theses

The conflict in the Pacific Northwest between competing visions of how federal forests should be managed resulted in a political stalemate in the early 1990s. The Northwest Forest Plan (NWFP) was initiated to resolve the demands for maintaining ecosystem processes and biological diversity with the social and economic needs for timber harvest. The foundation for the plan rested with the development of ecosystem management. The intent of this research is to explore the events which led up to the adoption of the NWFP, how it was implemented by the US Forest Service and Bureau of Land Management and the subsequent ...


On The Shoulders Of Giants: Continuing The Legacy Of Large-Scale Ecosystem Manipulation Experiments In Puerto Rico, Tana E. Wood, Grizelle González, Whendee L. Silver, Sasha C. Reed, Molly A. Cavaleri 2019 USDA Forest Service

On The Shoulders Of Giants: Continuing The Legacy Of Large-Scale Ecosystem Manipulation Experiments In Puerto Rico, Tana E. Wood, Grizelle González, Whendee L. Silver, Sasha C. Reed, Molly A. Cavaleri

School of Forest Resources and Environmental Science Publications

There is a long history of experimental research in the Luquillo Experimental Forest in Puerto Rico. These experiments have addressed questions about biotic thresholds, assessed why communities vary along natural gradients, and have explored forest responses to a range of both anthropogenic and non-anthropogenic disturbances. Combined, these studies cover many of the major disturbances that affect tropical forests around the world and span a wide range of topics, including the effects of forest thinning, ionizing radiation, hurricane disturbance, nitrogen deposition, drought, and global warming. These invaluable studies have greatly enhanced our understanding of tropical forest function under different disturbance regimes ...


Using Publicly Available Genbank Data To Teach Plant Phylogeny In High School Classrooms, Madhav P. Nepal, Ethan J. Andersen 2019 South Dakota State University

Using Publicly Available Genbank Data To Teach Plant Phylogeny In High School Classrooms, Madhav P. Nepal, Ethan J. Andersen

iLEARN Teaching Resources

In this teaching module, students will learn about NCBI GenBank, search for DNA/protein sequences from multiple plant species of a gene that encodes Rubisco enzyme, construct and interpret a phylogenetic tree, and discuss traits that allowed plants to adapt their life on land.


Potential Economic Impacts Of Allocating More Land For Bioenergy Biomass Production In Virginia, Thomas O. Ochuodho, Janaki R. R. Alavalapati, Pankaj Lal, Domena A. Agyeman, Bernabas Wolde, Pralhad Burli 2019 University of Kentucky

Potential Economic Impacts Of Allocating More Land For Bioenergy Biomass Production In Virginia, Thomas O. Ochuodho, Janaki R. R. Alavalapati, Pankaj Lal, Domena A. Agyeman, Bernabas Wolde, Pralhad Burli

Forestry and Natural Resources Faculty Publications

The growing attention to renewable energy and rural development has created greater demand for production of biomass feedstock for bioenergy. However, forest growth rates and the amount of land in most existing forests may not be sufficient to sustainably supply the forest biomass required to support existing forest products industries and the expanding bioenergy industry. Additionally, concerns about agricultural land use competition have dampened expansion of biomass production on agricultural land base. One of the ways to meet the growing forest biomass feedstock demand for bioenergy production is by allocating currently marginal non-forested land for growing bioenergy feedstocks. In Virginia ...


Adaptation Strategies And Approaches For Forested Watersheds, P. Danielle Shannon, Christopher Swanston, Maria Janowiak, Stephen D. Handler, Kristen M. Schmitt, Leslie A. Brandt, Patricia Butler-Leopold 2019 Michigan Technological University

Adaptation Strategies And Approaches For Forested Watersheds, P. Danielle Shannon, Christopher Swanston, Maria Janowiak, Stephen D. Handler, Kristen M. Schmitt, Leslie A. Brandt, Patricia Butler-Leopold

School of Forest Resources and Environmental Science Publications

Intentional climate adaptation planning for ecosystems has become a necessary part of the job for natural resource managers and natural resource professionals in this era of non-stationarity. One of the major challenges in adapting ecosystems to climate change is in the translation of broad adaptation concepts to specific, tangible actions. Addressing management goals and values while considering the long-term risks associated with local climate change can make forested watershed management plans more robust to uncertainty and changing conditions. We provide a menu of tiered adaptation strategies, which we developed with a focus on forests of the Midwest and Northeastern U ...


Urban Colonization Through Multiple Genetic Lenses: The City‐Fox Phenomenon Revisited, Alexandra L. DeCandia, Kristin Brzeski, Elizabeth Heppenheimer, Catherine V. Caro, Glauco Camenisch, Peter Wandeler, Carlos Driscoll 2019 Princeton University

Urban Colonization Through Multiple Genetic Lenses: The City‐Fox Phenomenon Revisited, Alexandra L. Decandia, Kristin Brzeski, Elizabeth Heppenheimer, Catherine V. Caro, Glauco Camenisch, Peter Wandeler, Carlos Driscoll

Michigan Tech Publications

Urbanization is driving environmental change on a global scale, creating novel environments for wildlife to colonize. Through a combination of stochastic and selective processes, urbanization is also driving evolutionary change. For instance, difficulty in traversing human‐modified landscapes may isolate newly established populations from rural sources, while novel selective pressures, such as altered disease risk, toxicant exposure, and light pollution, may further diverge populations through local adaptation. Assessing the evolutionary consequences of urban colonization and the processes underlying them is a principle aim of urban evolutionary ecology. In the present study, we revisited the genetic effects of urbanization on red ...


Wildfire Alters Spatial Patterns Of Available Soil Nitrogen And Understory Environments In A Valley Boreal Larch Forest, Jianjian Kong, Jian Yang, Bo Liu, Lin Qi 2019 Shenyang Normal University, China

Wildfire Alters Spatial Patterns Of Available Soil Nitrogen And Understory Environments In A Valley Boreal Larch Forest, Jianjian Kong, Jian Yang, Bo Liu, Lin Qi

Forestry and Natural Resources Faculty Publications

Wildfire, a primary natural disturbance in many forests, affects soil nutrient availability and spatial distributions of forest plants. However, post-fire changes in soil nutrients and spatial patterns of understory environments at fine scales are poorly understood. Here, we characterized spatial patterns of soil nitrogen availability and site characteristics at a 3-year-post-fire and an unburned site in a valley boreal larch forest. We also examined the relationship between soil nitrogen availability and site characteristics. The results showed that the burned site had higher NO3 and lower NH4+ than the control. The herb, litter and coarse wood debris cover was ...


The Effects Of Matthew’S Storm Surge On Coastal Loblolly Pine And Wax Myrtle Understory Regeneration, Brynn D. Wilkinson 2019 South Carolina Governor's School for Science and Mathematics

The Effects Of Matthew’S Storm Surge On Coastal Loblolly Pine And Wax Myrtle Understory Regeneration, Brynn D. Wilkinson

Journal of the South Carolina Academy of Science

Hurricanes have detrimental effects on the environment and the economy. Not only are these effects felt immediately after the hurricane, but they last long after the winds have died down. They can affect future plant growth and mortality. In October of 2016 South Carolina was hit by Hurricane Matthew, a category 5 hurricane. Hobcaw Barony, our study site, was in the direct path of the storm. This created an opportunity to study the immediate effects on regeneration after a hurricane. Regenerations rates were measured along and around a surge line to determine regeneration and mortality rates. This data also allowed ...


Iron (Oxyhydr)Oxides Serve As Phosphate Traps In Tundra And Boreal Peat Soils, Elizabeth M. Herndon, Lauren Kinsman-Costello, Kiersten A. Duroe, Jonathan Mills, Evan Kane, Stephen D. Sebestyen, Aaron A. Thompson, Stan D. Wullschleger 2019 Kent State University

Iron (Oxyhydr)Oxides Serve As Phosphate Traps In Tundra And Boreal Peat Soils, Elizabeth M. Herndon, Lauren Kinsman-Costello, Kiersten A. Duroe, Jonathan Mills, Evan Kane, Stephen D. Sebestyen, Aaron A. Thompson, Stan D. Wullschleger

School of Forest Resources and Environmental Science Publications

Arctic and boreal ecosystems are experiencing pronounced warming that is accelerating decomposition of soil organic matter and releasing greenhouse gases to the atmosphere. Future carbon storage in these ecosystems depends on the balance between microbial decomposition and primary production, both of which can be regulated by nutrients such as phosphorus. Phosphorus cycling in tundra and boreal regions is often assumed to occur through biological pathways with little interaction with soil minerals; that is, phosphate released from organic molecules is rapidly assimilated by plants or microorganisms. In contrast to this prevailing conceptual model, we use sequential extractions and spectroscopic techniques to ...


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