Digital Commons Network^™

Incorporating Climate Change In Nepa Reviews: Recommendations For Reform, Michael Burger, Romany M. Webb, Jessica A. Wentz

Sabin Center for Climate Change Law

The National Environmental Policy Act (“NEPA”) requires federal agencies to conduct an environmental review prior to moving ahead with any major federal project, plan, or program that could significantly affect the environment. As part of the environmental review, agencies must share information with, and solicit feedback from, the public. The goal is to improve federal decision-making by ensuring that agencies take a hard look at the environmental effects of their actions and fully inform the public about those effects.

In guidance issued in 2016, the Council on Environmental Quality (“CEQ”)—the federal body charged with implementing NEPA—identified climate change as a …

A Reappraisal Of Polyploidy Events In Grasses (Poaceae) In A Rapidly Changing World, Acga Cheng, Noraikim Mohd Hanafiah, Jennifer Ann Harikrishna, Niranjan Baisakh, Muhamad Shakirin Mispan, Lim Phaik Eem

Faculty Publications

Around 80% of megaflora species became extinct at the Cretaceous–Paleogene (K–Pg) boundary. Subsequent polyploidy events drove the survival of thousands of plant species and played a significant historical role in the development of the most successful modern cereal crops. However, current and rapid global temperature change poses an urgent threat to food crops worldwide, including the world’s big three cereals: rice, wheat, and maize, which are members of the grass family, Poaceae. Some minor cereals from the same family (such as teff) have grown in popularity in recent years, but there are important knowledge gaps regarding the similarities and differences …

Black Carbon Dominated Dust In Recent Radiative Forcing On Rocky Mountain Snowpacks, Kelly E. Gleason, Joseph R. Mcconnell, Monica M. Arienzo, Graham Sexstone, Stefan Rahimi

Environmental Science and Management Faculty Publications and Presentations

The vast majority of surface water resources in the semi-arid western United States start as winter snowpack. Solar radiation is a primary driver of snowmelt, making snowpack water resources especially sensitive to even small increases in concentrations of light absorbing particles such as mineral dust and combustion-related black carbon (BC). Here we show, using fresh snow measurements and snowpack modeling at 51 widely distributed sites in the Rocky Mountain region, that BC dominated impurity-driven radiative forcing in 2018. BC contributed three times more radiative forcing on average than dust, and up to 17 times more at individual locations. Evaluation of …

Describing The Effect Of Thin Layer Sediment Placement On Coastal Microbial Communities Using Foraminifera Diversity, Elizabeth B. Billings

Senior Honors Projects

Salt marshes are rich ecosystems that play an important role in aquatic food systems and prevent erosion while also providing essential habitats for wildlife. Climate change has resulted in rising sea levels and erosion of these coastal wetlands. Thin Layer Sediment Placement (TLP) is a restoration effort being implemented to mitigate the effects of climate change on coastal ecosystems. The TLP process raises elevation of the marsh and provides substrates for vegetative growth by spraying dredged sediment over existing marsh. The impacts of TLP on microbial populations is not widely understood, therefore metrics are required to study the effects of …

Seasonal Trends In Adult Apparent Survival And Reproductive Trade-Offs Reveal Potential Constraints To Earlier Nesting In A Migratory Bird, Kathleen R. Callery, John A. Smallwood, Anjolene R. Hunt, Emilie R. Snyder, Julie A. Heath

Biology Faculty Publications and Presentations

Birds aim to optimize resources for feeding young and self-maintenance by timing reproduction to coincide with peak food availability. When reproduction is mistimed, birds could incur costs that affect their survival. We studied whether nesting phenology correlated with the apparent survival of American kestrels (Falco sparverius) from two distinct populations and examined trends in clutch-initiation dates. We estimated apparent survival using multi-state mark-recapture models with nesting timing, nesting success, sex, age, and weather covariates. Nesting timing predicted the apparent survival of successful adults; however, the effect differed between populations. Early nesting kestrels had higher apparent survival than later …

Notes From The Underground: An Exploration Of Burying Beetle Thermal Ecology, Sound Production And Reception, And Brain Morphology., Michelle Ward

Doctoral Dissertations

In a climatically and structurally changing world, it is important to understand how different thermal and social environments influence the behavior and physiology of the pillars of terrestrial ecosystems: insects. In this dissertation, I explored how insects, specifically Nicrophorus beetles, respond to biotic and abiotic challenges. Through this research, I addressed 1) how daily fluctuations in temperature influence Nicrophorus americanus reproductive success, 2) the context in which breeding pairs use stridulation during carcass burial, and subsequently how inhibition of stridulation influences reproductive success, 3) if the clypeal membrane on Nicrophorus beetles has the physiological properties of a tympanum, and if …

Compound, Elemental, And Isotopic Perspectives On Mercury Mobilization During Thaw In A Discontinuous Permafrost Zone, Maria F. Fahnestock

Doctoral Dissertations

Arctic ecosystems are a major global sink for both carbon (C) and mercury (Hg), both of which are influenced by anthropogenic activities. The accelerated climate-change-induced warming documented in the Arctic has led to permafrost thaw resulting in landscape evolution from hydrological, vegetation and microbial shifts. All of these resulting changes have the potential to influence how Hg, a toxic contaminant, is mobilized and re-cycled in this ecosystem. In this body of work, I investigate patterns of Hg speciation, elemental abundances, and stable isotopes across the thaw gradient in a permafrost peatland and interconnected freshwater lakes in Abisko, Sweden to assess …

The Potential Impact Of Climate Change On The Distributions Of Eleutherodactylus Cystignathoides And E. Planirostris (Anura: Eleutherodactylidae), Rebecca T. Chastain

Theses and Dissertations

Climate change is inducing changes in the distributions of many species, causing range shifts and habitat loss as well as facilitating invasions. It is a broad contributor to global amphibian decline, already causing mass extinctions and extirpations of amphibian populations, a phenomenon which is expected to continue. The understudied direct-developing frog Eleutherodactylus cystignathoides is a notable outlier, having rapidly expanded its distribution in recent years. This is of particular interest given that other eleutherodactylids, such as E. coqui and E. planirostris, have already shown propensity for rapid dispersal and invasion. Originally found in the southernmost tip of …

Seasonal Trends In Adult Apparent Survival And Reproductive Trade-Offs Reveal Potential Constraints To Earlier Nesting In A Migratory Bird, Kathleen R. Callery, John A. Smallwood, Anjolene R. Hunt, Emilie R. Snyder, Julie A. Heath

Department of Biology Faculty Scholarship and Creative Works

Birds aim to optimize resources for feeding young and self-maintenance by timing reproduction to coincide with peak food availability. When reproduction is mistimed, birds could incur costs that affect their survival. We studied whether nesting phenology correlated with the apparent survival of American kestrels (Falco sparverius) from two distinct populations and examined trends in clutch-initiation dates. We estimated apparent survival using multi-state mark-recapture models with nesting timing, nesting success, sex, age, and weather covariates. Nesting timing predicted the apparent survival of successful adults; however, the effect differed between populations. Early nesting kestrels had higher apparent survival than later nesters in …

Effect Of Climate Variability On Lyme Disease Cases In The United States – A Retrospective Study, Larissa Mark

Capstone Experience: Master of Public Health

Vector-borne illnesses are a growing serious global public health threat. According to the CDC, Lyme disease (LD) is the most common vector-borne disease in the United States. It is caused by the bacterium Borrelia burgdorferi and is transmitted to humans through the bite of an infected black-legged tick. Since the discovery, LD has increased in both incidence and geographical distribution. Vector life cycles and disease transmission are highly sensitive to abiotic conditions; as such, it is expected that climate change will alter the geographic distribution and magnitude of vector-borne illnesses. Certain facets of climate change like precipitation patterns, greater climate …

The Impacts Of Increased Precipitation Intensity On Dryland Ecosystems In The Western United States, Martin C. Holdrege

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

As the atmosphere warms, precipitation events become larger, but less frequent. Such increases in precipitation intensity are expected regardless of changes in total annual precipitation. Despite strong evidence for increases in precipitation intensity, disagreement exists regarding how these changes will impact plants, and studies are lacking in many types of ecosystems. This dissertation addresses how increased precipitation intensity affects soil water availability, and how plants respond to any such changes. I address this question in the context of big sagebrush ecosystems and dryland winter wheat agriculture, which are both environments that can be sensitive to changes in water availability. Results …

Sex, Body Size, And Winter Weather Explain Migration Strategies In A Partial Migrant Population Of American Kestrels (Falco Sparverius), Sadie Claire Ranck

Boise State University Theses and Dissertations

Partially migratory systems describe populations that consist of both individuals that migrate away from the breeding grounds for the winter, and others that remain resident near their nesting sites year-round. Partial migration is the most common type of migration across all animal taxa, but the evolution, maintenance, and consequences associated with different movement strategies are still poorly understood. Studying the factors that drive migratory strategies and the associated consequences of those decisions is important to understand how migratory animals may adapt to climate change. Partial migrant populations offer a great opportunity for which to study these questions because individuals with …

Into The Depths: Climate Change Part 1, Felicia Bedford

D.U.Quark

No abstract provided.

Into The Depths: Climate Change Part 2, Felicia Bedford

D.U.Quark

No abstract provided.

Climate Change And Management Impacts On Soybean N Fixation, Soil N Mineralization, N2O Emissions, And Seed Yield, Elvis F. Elli, Ignacio A. Ciampitti, Michael J. Castellano, Larry C. Purcell, Seth Naeve, Patricio Grassini, Nicolas C. La Menza, Luiz Moro Rosso, André F. De Borja Reis, Péter Kovács, Sotirios V. Archontoulis

Department of Agronomy and Horticulture: Faculty Publications

Limited knowledge about how nitrogen (N) dynamics are affected by climate change, weather variability, and crop management is a major barrier to improving the productivity and environmental performance of soybean-based cropping systems. To fill this knowledge gap, we created a systems understanding of agroecosystem N dynamics and quantified the impact of controllable (management) and uncontrollable (weather, climate) factors on N fluxes and soybean yields. We performed a simulation experiment across 10 soybean production environments in the United States using the Agricultural Production Systems sIMulator (APSIM) model and future climate projections from five global circulation models. Climate change (2020–2080) increased N …

The Effects Of Increasing Ocean Temperatures On The Survivorship Of A Subtropical Population Of The Sea Urchin Arbacia Punctulata, Rhianna Clemons

Undergraduate Theses

Most sea urchin species have critical ecological roles in their ecosystems, such as keystone grazers. There is an increasing need to understand the impacts of rising temperatures on species that are vital to the health of their environments. Studies have shown that increasing temperatures may significantly negatively affect several important biological processes including reproduction, development, and excretion in many species including sea urchins. However, very little is known about the sea urchin species Arbacia punctulata. In this study, individuals were exposed to 21˚C (control, n = 12) and 27˚C (experimental, n = 12) for seven days, and survivorship was …

The Grizzly, April 14, 2022, Layla Halterman, Amelia Kunko, Jenna Smith, Marie Sykes, Brooke Hurley, Ava Compagnoni, John Murray, Kathy Logan

Ursinus College Grizzly Newspaper, 1978 to Present

$3 Million Donation Creates Andrews Family Fellows • Bidding Alvert Hernandez Farewell! • Extra! Extra! Watch All About It • Opinions: Don't Judge a House by Its Exterior - Main Street Edition; Ursinus Greenspace - Misused or Ignored? • Warming Up to the Season • The Long Match

Physiological And Biochemical Thermal Stress Conditions Of The Ribbed Mussel, Geukensia Demissa, From Exposed And Less Exposed Areas In The Intertidal Salt Marsh On Tybee Island, Georgia., Jody E. Erber

Honors College Theses

Geukensia demissa, the ribbed mussel, is a keystone species of Georgia’s coastline that is at risk of experiencing detrimental thermal stress due to climate change. G. demissa interacts positively with a species of salt marsh cordgrass, Spartina alterniflora. Mussels form aggregates beneath salt marsh cordgrass stems where they are shaded and less exposed to sun rays. However, some mussels end up in areas which lack cordgrass and are directly exposed to sun rays. Body temperatures of mussels from exposed areas were found to be higher than mussels from less exposed areas. Thermal stress levels of mussels can be …

The Spectre Of “Overpopulation” In Climate Change, Kris Mann

Honors Theses

Malthusian overpopulation remains a popular idea across the globe as something that needs to be combated, especially with the anthropogenic impact on the environment. The central guiding question is: To what extent is “overpopulation” a valid notion with regards to the present climate crisis, and should action be taken regarding population reduction? This research concludes that the notion of overpopulation itself is racist, classist, and has caused senseless amounts of suffering in its wake. The inherent notion of overpopulation can only be reductively applied to our current global status with regards to fighting climate change. While the climate crisis is …

Seagrasses Under Times Of Change - Editorial, Gidon Winters, Mirta Teichberg, Hauke Reuter, Inés G. Viana, Demian A. Willette

Biology Faculty Works

No abstract provided.

Growing Up Water, Dominique Barbee

Theses and Dissertations

“Growing Up Water” is a full-length manuscript consisting of one long poem in two parts. Louisiana is one of the most verdant naturally fertile states in the U.S. The state loses a football field of land almost every one-hundred minutes. This is largely due to climate change, oil drilling in the gulf, the cutting of canals, the waste poured in to the Mississippi river by the chemical plants that line this area (known as “Cancer Alley”), the onslaught of invasive species, the list goes on. Furthermore, due to global warming, “big” hurricanes are only becoming stronger and more frequent. Any …

Geology Online Lab Activities An Open Educational Resource For Community College Students And Instructors, Rondi Davies

Open Educational Resources

The online geology lab for community college students was developed by Dr. Rondi Davies, a faculty member at Queensborough Community College, City University New York, during two years of forced online synchronous learning brought on by the COVID-19 pandemic. This open educational resource collects many of Dr. Davies’ favorite open-access materials and supplements them with her own work within a single, cohesive laboratory manual intended for two-year, non-major college students from the New York area.

Dr. Davies wanted to develop labs that were fun, engaging, and that excited students about the subject, were relevant to their lives, helped them to …

Twenty-First Century Bioarchaeology: Taking Stock And Moving Forward, Jane E. Buikstra, Sharon N. Dewitte, Sabrina C. Agarwal, Brenda J. Baker, Eric J. Bartelink, Elizabeth Berger, Kelly E. Blevins, Katelyn Bolhofner, Alexis T. Boutin, Megan B. Brickley, Michele R. Buzon, Carlina De La Cova, Lynne Goldstein, Rebecca Gowland, Anne L. Grauer, Lesley A. Gregoricka, Siân E. Halcrow, Sarah A. Hall, Simon Hillson, Ann M. Kakaliouras, Haagen D. Klaus, Kelly J. Knudson, Christopher J. Knüsel, Clark Spencer Larsen, Debra L. Martin, George R. Milner, Mario Novak, Kenneth C. Nystrom, Sofía I. Pacheco-Forés, Tracy L. Prowse, Gwen Robbins Schug, Charlotte A. Roberts, Jessica E. Rothwell, Ana Luisa Santos, Christopher M. Stojanowski, Anne C. Stone, Kyra E. Stull, Daniel H. Temple, Christina M. Torres, J. Marla Toyne, Tiffany A. Tung, Jaime Ullinger, Karin Wiltschke-Schrotta, Sonia R. Zakrzewski

Anthropology: Faculty Publications and Other Works

This article presents outcomes from a Workshop entitled “Bioarchaeology: Taking Stock and Moving Forward,” which was held at Arizona State University (ASU) on March 6–8, 2020. Funded by the National Science Foundation (NSF), the School of Human Evolution and Social Change (ASU), and the Center for Bioarchaeological Research (CBR, ASU), the Workshop's overall goal was to explore reasons why research proposals submitted by bioarchaeologists, both graduate students and established scholars, fared disproportionately poorly within recent NSF Anthropology Program competitions and to offer advice for increasing success. Therefore, this Workshop comprised 43 international scholars and four advanced graduate students with a …

The Risk Of Multiple Anthropogenic And Climate Change Threats Must Be Considered For Continental Scale Conservation And Management Of Seagrass Habitat, Kathryn Mcmahon, Kieryn Kilminster, Robert Canto, Chris Roelfsema, Mitchell Lyons, Gary A. Kendrick, Michelle Waycott, James Udy

Research outputs 2022 to 2026

Globally marine-terrestrial interfaces are highly impacted due to a range of human pressures. Seagrass habitats exist in the shallow marine waters of this interface, have significant values and are impacted by a range of pressures. Cumulative risk analysis is widely used to identify risk from multiple threats and assist in prioritizing management actions. This study conducted a cumulative risk analysis of seagrass habitat associated with the Australian continent to support management actions. We developed a spatially explicit risk model based on a database of threats to coastal aquatic habitat in Australia, spanning 35,000 km of coastline. Risk hotspots were identified …

Ecological And Social Strategies For Managing Fisheries Using The Resist-Accept- Direct (Rad) Framework, Abigail J. Lynch, Frank J. Rahel, Doug Limpinsel, Suresh A. Sethi, Augustin C. Engman, David J. Lawrence, Katherine E. Mills, Wendy Morrison, Jay Jay Peterson, Mark T. Porath

United States Fish and Wildlife Service: Publications

Fisheries management is a complex task made even more challenging by rapid and unprecedented socioecological transformations associated with climate change. The Resist-Accept- Direct (RAD) framework can be a useful tool to support fisheries management in facing the high uncertainty and variability associated with aquatic ecosystem transformations. Here, RAD strategies are presented to address ecological goals for aquatic ecosystems and social goals for fisheries. These strategies are mapped on a controllability matrix which explores the ability to guide a system's behaviour towards a desired state based on ecological responsiveness and societal receptivity to change. Understanding and improving the controllability of aquatic …

Oyster Reef-To-Mangrove Regime Shifts Along The West Coast Of Florida, Stephen Gregory Hesterberg

USF Tampa Graduate Theses and Dissertations

Ecological regime shifts are transitions in ecosystem state, which can occur either when external conditions gradually change or when large perturbations force a system into an alternative state. Such transitions can exhibit non-linear dynamics, where small changes in external conditions can result in abrupt transition and often occur with little warning. After crossing a tipping point, the system may be unable to revert to its original state if the new regime possesses strong, reinforcing feedbacks. Numerous marine ecosystems have experienced regime shifts due to a combination of stressors that have eroded ecological resilience, such as overfishing, nutrient loading, and climate …

Climate Change, Air Pollution, And Children’S Mental Health, Wuyue Yu, Michael Weitzman

Journal of Applied Research on Children: Informing Policy for Children at Risk

Climate change and air pollution are twin global public health challenges of high priority. Sharing linked causes and solutions, both climate change and air pollution are suggested by a growing body of research to inflict negative mental health outcomes through multiple mechanisms. However, there are still gaps in understanding the links between climate change, air pollution and mental health, especially in children and adolescents, who are particularly at-risk. Current findings are summarized and their implications for future research as well as public health policies are discussed.

Human Impact On Planetary Temperature And Glacial Volume: Extending A Toy Climate Model To A New Millennium, Samantha Secor, Jennifer Switkes

CODEE Journal

Starting with a toy climate model from the literature, we employ a system of two nonlinear differential equations to model the reciprocal effects of the average temperature and the percentage of glacial volume on Earth. In the literature, this model is used to demonstrate the potential for a stable periodic orbit over a long time span in the form of an attracting limit cycle. In the roughly twenty five years since this model appeared in the literature, the effects of global warming and human-impacted climate change have become much more well known and apparent. We demonstrate modification of initial conditions …

Methane And Nitrous Oxide Emissions From Grazed Grasslands, Harry Clark, C. Pinares-Patiño, C. De Klein

IGC Proceedings (1977-2023)

Key points

1. Emissions of methane (CH₄) and nitrous oxide (N₂O) from grasslands make a substantial contribution to total agricultural emissions of these two gases.

2. At present practical mitigation options that relate to grazing ruminants and grazed pastures are limited.

3. Research into agricultural greenhouse gas emissions is of low priority in most developed countries.

4. Direct manipulation of the rumen ecosystem provides the best opportunity for large reductions in CH₄ in the long term.

5. Reducing the amount of nitrogen (N) excreted by grazing animals is a priority in N₂O research, …

Climate Effects On Black Spruce And Trembling Aspen Productivity In Natural Origin Mixed Stands, Mahadev Sharma

Aspen Bibliography

Forest managers need site productivity estimates for tree species growing in mixed stands. Models developed in the past are generally for pure stands and don’t factor in the effects of climate change on site productivity. Therefore, site index (SI) models were developed for black spruce (Picea mariana Mill. B.S.P.) and trembling aspen (Populus tremuloides Michx.) trees grown in natural origin mixed stands. For this, 186 trees (93 black spruce and trembling aspen each) were sampled from 31 even-aged natural mixed stands (sites) (3 trees/species/site) across Ontario, Canada. Stand height growth models were developed by incorporating climate variables during …