Digital Commons Network^™

The Variability Of Seawater Carbonate Chemistry In Two Florida Urban Mangrove Ecosystems, Alexandrina R. Rangel

All HCAS Student Capstones, Theses, and Dissertations

Anthropogenic carbon dioxide (CO₂) emissions into the atmosphere are yielding serious impacts across the world’s ocean, including ocean acidification, sea level rise, and increasing seawater temperature. However, these changes are not occurring uniformly across all marine ecosystems. Coastal ecosystems, such as mangroves, already experience extreme and variable environmental conditions due to natural biogeochemical and physical processes. The goal of this study was to document small-scale variability in two urban mangrove ecosystems to gain insight into how ocean acidification will manifest within these systems. Using a stand-up paddleboard, a suite of sensors, and traditional bottle sampling techniques, we measured …

Toward Rationality In Oil And Gas Leasing: Building The Toolkit For Programmatic Reforms, Rachel Rothschild, Max Sarinsky

Other Publications

For decades, the federal government has inadequately considered the environmental harms of oil and gas extraction in its management of public lands and waters. As a result, fossil-fuel developers have been handed vast swaths of land at bargain prices, causing dangerous levels of greenhouse gas pollution that exacerbates climate change while depriving the public of more beneficial uses of the land.

That is all likely to change soon. A week into his term, President Biden called for a comprehensive review of the oil and gas program.1 That review is now underway and is likely to result in substantial programmatic reforms …

Vecinos Para El Bienestar De La Comunidad Costera V. Ferc, Malcolm M. Gilbert

Public Land & Resources Law Review

The D.C. Circuit Court remanded three Brownsville, TX LNG approval orders to FERC for failing to adequately explain conclusions around environmental justice and climate concerns. The Court ordered FERC to reevaluate whether the projects are in the public interest. The LNG terminals and pipeline will disproportionately impact low-income, minority communities, and substantial greenhouse gas emissions from production and export will contribute to anthropogenic climate change. This case note explores the role that environmental justice and climate change play in federal agency decision-making processes, analyzes the legal framework for the Court's decision, and discusses how the outcome of this litigation could …

Diminishing Opportunities For Sustainability Of Coastal Cities In The Anthropocene: A Review, John W. Day, Joel D. Gunn, Joseph Robert Burger

Biology Faculty Publications

The world is urbanizing most rapidly in tropical to sub-temperate areas and in coastal zones. Climate change along with other global change forcings will diminish the opportunities for sustainability of cities, especially in coastal areas in low-income countries. Climate forcings include global temperature and heatwave increases that are expanding the equatorial tropical belt, sea-level rise, an increase in the frequency of the most intense tropical cyclones, both increases and decreases in freshwater inputs to coastal zones, and increasingly severe extreme precipitation events, droughts, freshwater shortages, heat waves, and wildfires. Current climate impacts are already strongly influencing natural and human systems. …

Understanding The Effects Of Climate Change Via Disturbance On Pristine Arctic Lakes—Multitrophic Level Response And Recovery To A 12-Yr, Low-Level Fertilization Experiment, Phaedra Budy, Casey A. Pennock, Anne E. Giblin, Chris Luecke, Daniel L. White, George W. Kling

Watershed Sciences Student Research

Effects of climate change-driven disturbance on lake ecosystems can be subtle; indirect effects include increased nutrient loading that could impact ecosystem function. We designed a low-level fertilization experiment to mimic persistent, climate change-driven disturbances (deeper thaw, greater weathering, or thermokarst failure) delivering nutrients to arctic lakes. We measured responses of pelagic trophic levels over 12 yr in a fertilized deep lake with fish and a shallow fishless lake, compared to paired reference lakes, and monitored recovery for 6 yr. Relative to prefertilization in the deep lake, we observed a maximum pelagic response in chl a (+201%), dissolved oxygen (DO, −43%), …

Pervasive Changes In Stream Intermittency Across The United States, Kendra E. Kaiser

Geosciences Faculty Publications and Presentations

Non-perennial streams are widespread, critical to ecosystems and society, and the subject of ongoing policy debate. Prior large-scale research on stream intermittency has been based on long-term averages, generally using annually aggregated data to characterize a highly variable process. As a result, it is not well understood if, how, or why the hydrology of non-perennial streams is changing. Here, we investigate trends and drivers of three intermittency signatures that describe the duration, timing, and dry-down period of stream intermittency across the continental United States (CONUS). Half of gages exhibited a significant trend through time in at least one of the …

Susceptibility Of High-Elevation Forests To Mountain Pine Beetle (Dendroctonus Ponderosae Hopkins) Under Climate Change, David N. Soderberg

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Across western North America, pine forests are important for timber, wildlife habitat, and at high elevations are important for water retention and yield from rain and snowmelt. The mountain pine beetle (MPB) is one of the most significant disturbance agents shaping pine forests, and like all insects, temperature is a major driver of its population success and the dynamics of the landscapes that they inhabit. Changing temperature regimes can therefore directly influence MPB population persistence at a particular location, in addition to potential shifts in the range boundaries that they inhabit. MPB is currently expanding its range northward in British …

Understanding Climate Change Impacts And Adaptation Potentials At Utah Ski Resorts, Rachel Hager

All Graduate Plan B and other Reports, Spring 1920 to Spring 2023

Increasing temperature and shifting precipitation regimes due to climate change are a significant threat to winter recreation. Some businesses such as high-elevation ski resorts are especially vulnerable to the impacts of climate change. However, ski resorts may be able mitigate the impacts of climate change by proactively implementing adaptation strategies. The overall goal of this study was to investigate the impact of climate change on Utah ski resorts, and to understand adaptation perception, barriers, and strategies for different resorts across the state.

To meet that goal, we used a mixed-methods approach including examining temperature shifts at all Utah ski resorts …

Temperature-Dependent Phenology Of The Parasitoid Fopius Arisanus On The Host Bactrocera Dorsalis, Samuel Nanga Nanga, S. Kekeunou, A. Fotso Kuate, K. K.M. Fiaboe, M. A. Dongmo Kenfak, H. E. Tonnang, D. Gnanvossou, C. Djiéto-Lordon, R. Hanna

All Peer-Reviewed Publications

Fopius arisanus (Sonan), an egg-pupal parasitoid of numerous fruit fly species, was recently introduced into Africa for the control of the Oriental fruit fly, Bactrocera dorsalis (Hendel). In this study, life-table data of F. arisanus were generated under laboratory conditions at six constant temperatures (15, 20, 25, 30, 28 and 35 °C; 75% RH, L12:D12 photoperiod) and under variable conditions in a screenhouse on B. dorsalis. Several non-linear functions were fitted to model species development, mortality, longevity and oviposition using the Insect Life Cycle Modeling (ILCYM) software. The established phenology models were stochastically simulated at variable temperatures to estimate the …

Fire, Water, And Biodiversity In The Sierra Nevada: A Possible Triple Win, Scott L. Stephens, Sally Thompson, Gabrielle Boisramé, Brandon M. Collins, Lauren C. Ponisio, Ekaterina Rakhmatulina, Zachary L. Steel, Jens T. Stevens, Jan W. Van Wagtendonk, Kate Wilkin

Faculty Research, Scholarly, and Creative Activity

Reducing the risk of large, severe wildfires while also increasing the security of mountain water supplies and enhancing biodiversity are urgent priorities in western US forests. After a century of fire suppression, Yosemite and Sequoia-Kings Canyon National Parks located in California’s Sierra Nevada initiated programs to manage wildfires and these areas present a rare opportunity to study the effects of restored fire regimes. Forest cover decreased during the managed wildfire period and meadow and shrubland cover increased, especially in Yosemite’s Illilouette Creek basin that experienced a 20% reduction in forest area. These areas now support greater pyrodiversity and consequently greater …

Empowering Hope-Based Climate Change Communication Techniques For The Gulf Of Maine, Aimee Bonanno, Megan Ennes, Jennifer A. Hoey, Emily Moberg, Sarah-Mae Nelson, Nette Pletcher, Richelle L. Tanner

Biology, Chemistry, and Environmental Sciences Faculty Articles and Research

The Gulf of Maine is one of the fastest warming marine areas on the planet: The industries and creatures that call it home face an unprecedented shift in their interactions and existence. Scientists, policy makers, and practitioners often want to communicate to the public about the seriousness of the situation to encourage mitigation and adaptation. Many standard communication strategies that rely on fear and scientific authority alone—rather than comprehensive explanations that include solutions—can leave audiences feeling overwhelmed and disengaged, instead of hopeful and motivated to act. In this practice bridge, we showcase a social science research-based climate change communication “tool-kit” …

Changes In Allochronic Breeding Populations Of Pink Salmon (Oncorhynchus Gorbuscha) Of Prince William Sound, Alaska, Claire Dormody

Master's Theses

Prince William Sound, Alaska is home to one of the largest pink salmon (Oncorhynchus gorbuscha) fisheries in the world. Salmon populations there have been fished commercially for over a century, and the State’s documentation of commercial fishing provides a valuable dataset in order to examine abundance trends of species in this region. For this thesis research, I analyzed the fluctuations in abundance and isolated even year and odd year breeding populations of pink salmon to assess whether there is a numerical discrepancy between pink salmon that spawn in odd years and the population that spawns in even years. Analysis of …

Elevating Mental Health Disparities And Building Psychosocial Resilience Among Bipoc Children And Youth To Broaden The Climate And Health Discourse, Surili Sutaria Patel, Katherine Robb, C. Pluff, Evelyn Maldonado, Grace Tatar, Tia Williams

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

The co-occurring crises of climate change, a global pandemic, and the social justice movement has put demands on psychosocial resilience. The country and global community has witnessed that those who contribute the least to climate change are the most impacted, and that black, indigenous, and people of color bear the health and financial burdens brought on by a changing climate. Given that eco-anxiety is on the rise amongst young people, such increases in awareness building have not yielded action at the speed and scale necessary to protect the most climate-sensitive among us: children and youth. Raising healthy children and youth …

Conserving Temperate Grasslands In Australia: Historical Constraints, Future Possibilities, Louise Gilfedder, Ian Lunt, John Morgan, Richard J. Williams

IGC Proceedings (1977-2023)

No abstract provided.

Scenario Planning For Resilient Agricultural Systems: A Process For Engaging Controversy, Crystal A. Powers, Tyler Williams, Rick R. Stowell

Journal of Extension

Resiliency to weather extremes is already a part of farming in the North Plains, but now climate change is adding new uncertainties. Engaging farmers on this often controversial topic can be challenging given the wide range of beliefs farmers hold about climate change. Scenario planning provides a framework for Extension and agricultural system stakeholders to come together using the latest climate science to discover robust adaptive management options, prioritize Extension programming needs, and provide an open forum for starting the discussion.

Investigating Local Adaptation To Hypoxia Stress In The Eastern Oyster Through Comparative Transcriptomics, Heather Nichole Smith

LSU Master's Theses

Climate change represents one of the most important challenges to biodiversity, therefore it is important to understand the mechanisms that allow species to respond to rapid environmental change. Here, we compared two populations of eastern oysters, Crassostrea virginica, from the Gulf of Mexico to study the mechanisms underlying hypoxia tolerance. Using a common garden experiment and comparative transcriptomics, we identified sets of genes involved in the hypoxia response and found differences in both the timing and baseline expression of hypoxia-responsive genes between tolerant and sensitive populations, consistent with a scenario of local adaptation. These genes include the signaling transcription factor …

Gimme A Break: The Patent Term Restoration Act Should Give Environmental Innovators A Chance To Catch A (Cleaner) Breath, Gabrielle Gravel

Georgia Journal of Law & Technology

There is an abundance of frightening data painting a grim picture of Earth’s future. Humans have undoubtedly left a carbon footprint so deep, it will take drastic measures to undo our damage. To continue enjoying life as we know it, we humans must shift our focus to the powerful minds of creators and engineers to find ways to untangle our manmade webs. To generate interest and attract the best and brightest to do the challenging and time-consuming work of environmental inventions, the first step is to provide a greater incentive. This note calls upon the U.S. Patent and Trademark Office …

Habitat Use And Morphology Of Birds In "Intact" Amazonia Under Changing Climate, Vitek Jirinec

LSU Doctoral Dissertations

Neotropical forests contain the core of global avian diversity. Of these, the Amazon rainforest is the largest, but ~20% has already been lost to deforestation, inspiring research into the effects of clearing and fragmentation on forest birds. These studies have consistently shown that insectivorous birds that forage on or near the ground are the most sensitive species to forest disturbance. As a preamble to our study, we synthesized bird capture data collected over 40 years within continuous forest far from human disturbance. Remarkably, we found that terrestrial and near-ground insectivores have shown substantial abundance declines even within primary forest. The …

Functionalized Ionic Liquids For Improved Co2 Hydrogenation Catalysts, Amol Nanduji Jaybhaye

Masters Theses & Specialist Projects

Climate change is one of the biggest problems we are facing today, and anthropogenic greenhouse gases contribute significantly to it. Among greenhouse gasses, carbon dioxide emission is increased drastically and affecting majorly for increasing global temperature, and anything we can do to mitigate carbon dioxide emission will be helpful. A carbon dioxide hydrogenation reaction is a promising technique that can convert carbon dioxide into value-added chemicals, but the reaction rate is slow, and for that, we can use catalysts that will accelerate the reaction rate. Platinum-based nanoparticles have sparked research related to energy and environmental catalysts. Catalytic properties are depending …

Trends In Land Surface Phenology Across The Conterminous United States (1982-2016) Analyzed By Neon Domains, Liang Liang, Geoffrey M. Henebry, Lingling Liu, Xiaoyang Zhang, Li-Chih Hsu

Geography Faculty Publications

Tracking phenological change in a regionally explicit context is a key to understanding ecosystem status and change. The current study investigated long-term trends of satellite-observed land surface phenology (LSP) in the 17 National Ecological Observatory Network (NEON) domains across the conterminous United States (CONUS). Characterization of LSP trends was based on a high temporal resolution (3-d) time series of the two-band enhanced vegetation index (EVI2) derived from a long-term data record (LTDR) of the Advanced Very High Resolution Radiometer (AVHRR) and the Moderate Resolution Imaging Spectroradiometer (MODIS). We identified significant trend patterns in LSP and their seasonal climate and land …

Physiological And Molecular Responses Of Eurythermal And Stenothermal Populations Of Zostera Marina L (Eelgrass) To Climate Change, Carmen C. Zayas-Santiago

OES Theses and Dissertations

As CO₂ levels in Earth’s atmosphere and oceans steadily rise, varying organismal responses may produce ecological losers and winners. Increased ocean CO₂ can enhance seagrass productivity and thermal tolerance, providing some compensation for climate warming. However, the consistency of this CO₂ effect across populations of cosmopolitan species such as Zostera marina L. (eelgrass) remains largely unknown. This study analyzed whole-plant performance metabolic profiles and gene expression patterns of distinct eelgrass populations in response to CO₂ enrichment. Populations were transplanted from Nisqually Landing and Dumas Bay, two cold water environments in Puget Sound, WA (USA) that rarely …

Microbial Abundance And Enzymatic Activity From Tussock And Shrub Soil In Permafrost Peatland After 6-Year Warming, Yanyu Song, Lei Jiang, Changchun Song, Xianwei Wang, Xiuyan Ma, Hao Zhang, Wenwen Tan, Jinli Gao, Aixin Hou

Faculty Publications

Soil microbes and enzymes in permafrost peatland are sensitive to temperature changes, which might result in more potential loss of carbon and increase in available nitrogen from permafrost peatlands in a warming world. We previously demonstrated that 3-year warming could affect soil microbial abundance and enzymatic activity. However, soil microbial abundance and enzymatic activity in permafrost peatlands under long-term climate warming is not well understood. Therefore, a 6-year field manipulation experiment was used to assess the impact of long-term warming on soil microbial abundance and enzymatic activity in a permafrost peatland in northeastern China. Results showed that 6-year warming increased …

Effects Of Temperature On Competition Between Macrocystis Pyrifera And Sargassum Horneri, Ann M. Bishop

Capstone Projects and Master's Theses

Climate change is driving an increase in the number of El Niño and marine heatwave events, especially in the last decade. These events when coupled with localized stressors can lead to dramatic changes to the local ecology. Kelp forests, found in temporal ecosystems across the world, are among the most vulnerable to these extreme environmental shifts. Off the southern west coast of North America, kelp forests are experiencing warmer waters and additional stressors from the introductions of new species brought in by boats through busy ports. This study examined how the 2014 heatwave and the 2015/16 El Niño coupled with …

Species-Specific Transcriptomic Responses Of Juvenile Rockfish (Sebastes) To Simulated Future Upwelling Conditions, Holly Doerr

Capstone Projects and Master's Theses

Anthropogenic climate change is predicted to trigger large-scale changes in ocean chemistry over the next few decades. These conditions may be exacerbated in coastal upwelling regions where strong, seasonal increases in pCO2 and hypoxia are expected to intensify under climate change. Nearshore rockfishes (genus Sebastes) may already be adapted to fluctuating upwelling environments along the west coast of North America, but further shifts in ocean chemistry could push individuals beyond their physiological thresholds. I examined the effects of future upwelling conditions by simulating fluctuating vs. static levels of combined high pCO2 and low dissolved oxygen (DO) on the gill …

Crisis Communication, Anticipated Food Scarcity, And Food Preferences: Preregistered Evidence Of The Insurance Hypothesis, Michal Folwarczny, Jacob D. Christensen, Norman P. Li, Valdimar Sigurdsson, Tobias Otterbring

Research Collection School of Social Sciences

Whereas large-scale consumption of energy-dense foods contributes to climate change, we investigated whether exposure to climate change-induced food scarcity affects preferences toward these foods. Humans? current psychological mechanisms have developed in their ancestral evolutionary past to respond to immediate threats and opportunities. Consequently, these mechanisms may not distinguish between cues to actual food scarcity and cues to food scarcity distant in time and space. Drawing on the insurance hypothesis, which postulates that humans should respond to environmental cues to food scarcity through increased energy consumption, we predicted that exposing participants to climate change-induced food scarcity content increases their preferences toward …

Coralline Algae At Increased Co2: A Global Response To Ocean Acidification, V Pena, B Harvey, S Agostini, L Porzio, M Milazzo, P Horta, Gall L Le, J Hall-Spencer

School of Biological and Marine Sciences

Coralline algae are an ecologically important part of benthic communities worldwide and there is growing concern that ocean acidification can severely impact their calcite skeletons. Laboratory studies of coralline algae in simulated ocean acidification conditions have revealed wide response variability, making it difficult to assess their future biodiversity and contribution to ecosystem function. Here, we used natural gradients in seawater carbonate chemistry in widely separated biogeographic regions (Mediterranean, NW Pacific) to investigate the effects of ocean acidification on coralline algal biodiversity, abundance and skeletal mineralogy. Molecular identification showed a decrease in the taxonomic diversity of coralline algae with increasing acidification …

Supporting A Mountain As It Changes: People, Climate, And The Absence Of Trees, Caroline Ailanthus

Appalachia

A science writer shows how Monadnock’s landscape tells the story of climate change and calamity.

Sequoias And Redwoods In A Hotter World: When Trees As High As 30-Story Buildings "Die On Their Feet," Something's Wrong, Christopher Johnson

Appalachia

Scientists in two pioneering research projects are examining how climate change affects the iconic ancient trees of California, by Christopher Johnson.

Ancestral Comprehensions For A Policy For The Future Of The Earth: The Narrative Of The South American Andes In The Face Of The Global Climate Crisis, Erick Pajares G., Eduardo Calvo B., Jorge Iván Palacio P., Juan José Munar M., Carlos Loret De Mola, Darío Espinoza M., Yuri Godoy P., Gustavo Mora R.

Pace Environmental Law Review

No abstract provided.

Addressing Correlations Between Gender-Based Violence And Climate Change: An Expanded Role For International Climate Change Law And Education For Sustainable Development, Achinthi C. Vithanage

Pace Environmental Law Review

No abstract provided.