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Synthesizing a twelve-year sediment trap time series of planktic foraminiferal flux in the Gulf of America (Mexico) Synthesizing a twelve-year sediment trap time series of planktic foraminiferal flux in the Gulf of America (Mexico)
Sediment trap time series provide powerful frameworks for testing hypotheses about planktic foraminiferal assemblage composition, seasonality, and geochemical responses to environmental variability, all of which are central to improving paleoceanographic reconstructions. We present high resolution foraminiferal assemblage data from a long-running sediment trap (2008–2020) in the northern...
Authors
Julie N. Richey, Caitlin E. Reynolds, Emily B. Osborne, Maoli N. Vizcaino, Eric J. Tappa
Polystyrene microplastics alter the accumulation and elimination dynamics of silver nanoparticles in Daphnia magna Polystyrene microplastics alter the accumulation and elimination dynamics of silver nanoparticles in Daphnia magna
Rationale Microplastics (MPs) can interact with engineered nanomaterials and alter their environmental fate and bioavailability. However, their influence on the bioaccumulation dynamics of silver nanoparticles (AgNPs) in aquatic filter feeders under environmentally relevant conditions remains poorly understood. We hypothesized that polystyrene microplastics (PS-MPs) alter the uptake...
Authors
Sara Kamanmalek, Piper MacDonald, Hannah Hutton, Noor Sheikh, Marie Noele Croteau, Mahbub Alam, Mohammed Baalousha, Niveen Ismail
Evolution of arsenic speciation during thermal treatment simulating wildfire heating in arsenic-rich sediments Evolution of arsenic speciation during thermal treatment simulating wildfire heating in arsenic-rich sediments
Understanding arsenic transformations during wildfires can help better constrain the environmental impacts of increased wildfire intensity, frequency, and burned area. Previous studies have monitored the evolution of metal(loid) speciation at specific time/temperature endpoints, hampering the comprehension of the dynamic transformations of metal(loid)s during wildfires. Here, a novel...
Authors
Mohammed Baalousha, Morgane Desmau, Andrea L. Foster
Future of the Colorado River phase 2: Integrated operation of the Powell/Grand Canyon/Mead segment for water supply, hydropower, and river ecosystems Future of the Colorado River phase 2: Integrated operation of the Powell/Grand Canyon/Mead segment for water supply, hydropower, and river ecosystems
State and federal agencies are negotiating water-supply agreements that may govern water supply and storage in the Colorado River Basin through 2046. Current operating policies in the Colorado River primarily focus on water supply implications with less focus on the potential effects to other resources. Models that forecast the response of multiple resources over the short- and long-term...
Authors
John C. Schmidt, Charles B. Yackulic
Long-term effects of rangeland improvements on cattle distribution: A ranch-scale case study Long-term effects of rangeland improvements on cattle distribution: A ranch-scale case study
Resource matching can be a common assumption that underlies anthropogenic rangeland improvements for wildlife or livestock. Countless resources are spent on targeted vegetation manipulations for both livestock and wildlife, but selection for improved areas has not been well quantified in livestock. This case study investigates whether cattle exhibit preferential use of historically...
Authors
Sebastian Schreiber, Erica Francis Stuber, Juan J Villalba, Eric Thacker
Widespread landslide activity in an extreme wet season and implications for regional sediment management, eastern San Francisco Bay area, California Widespread landslide activity in an extreme wet season and implications for regional sediment management, eastern San Francisco Bay area, California
Watershed sediment production is expected to increase in a warmer future with more extreme rain, with cascading effects throughout drainage and sediment-transport networks. This study investigated landscape-scale sediment movement in the eastern San Francisco Bay area, California, USA, during the extreme 2016–2017 wet season that brought major rainfall, landslides, and flooding. Mapping...
Authors
Amy E. East, Amy Foxgrover, Skye C. Corbett, Brian D. Collins, Andrew C. Ritchie
Microclimate mediates the strength and direction of avian biotic interactions Microclimate mediates the strength and direction of avian biotic interactions
Theory predicts that that the strength and direction of species interactions can shift from being competitive in benign environments toward being facilitative in stressful environments. However, the environmental context dependency of species interactions has rarely been tested in animal communities. We capitalized on a 15-year, landscape-scale dataset, collected annually in a relatively...
Authors
Sarah J. Frey, Brian Daniel Gerber, Adam S. Hadley, Hankyu Kim, Madison Sutton, Nina C. Ferrari, Matthew G. Betts
A roadmap for identifying and interpreting physical processes and national water model prediction bias associated with baseflow index regimes across the contiguous United States A roadmap for identifying and interpreting physical processes and national water model prediction bias associated with baseflow index regimes across the contiguous United States
Understanding how groundwater–surface water interactions shape streamflow variability is critical for diagnosing low flow behavior and prediction bias in continental scale hydrologic models. We present a process informed framework that links observed baseflow (BF) dynamics, watershed attributes, and National Water Model (NWM) performance across the contiguous United States. Using daily...
Authors
Ryan van der Heijden, Ali Dadkhah, Scott Douglas Hamshaw, Mandar Dewoolkar, Ehsan Ghazanfari, Norm Jones, Gustavious Williams, Prabhakar Clement, Donna M. Rizzo
Getting the story straight: Common misconceptions around volcanoes and eruptions with case studies of recent events Getting the story straight: Common misconceptions around volcanoes and eruptions with case studies of recent events
The ability to rapidly disseminate scientific knowledge across the world has never been greater. This is paralleled by the ability of rumors to spread equally far and fast. Popular misconceptions can take root and, without correction, take on the appearance of facts. Commonly misunderstood topics include those with attention-grabbing phrasing (e.g. “Pacific Ring of Fire”, “supervolcanoes...
Authors
Janine Krippner, Sam Poppe, Christian Farias, Ed Venzke, Michael Poland, B. Behncke, Sara K. McBride, Jessica L. Ball, Diana Roman, Heather K. Handley, Claire J. Horwell, Benjamin R Edwards, Loÿc Vanderkluysen, Carol Stewart, Emma J. Nicholson, Alia Juman, Ma. Mylene Martinez-Villegas,, Brian Terbush, Erik W. Klemetti, Jazmin Scarlett, Rebecca Williams, Valerie A. Finlayson, Kadie Bennis, Sally K. Sennert, Thomas C. Pierson, Devy K. Syahbana, Arianna Soldati
The Great Salt Lake (Utah, USA) acoustic and sedimentary archive of Wasatch Front earthquakes The Great Salt Lake (Utah, USA) acoustic and sedimentary archive of Wasatch Front earthquakes
As the largest low-relief basin in the western United States, the Great Salt Lake offers an opportunity to explore acoustic and sedimentary archives of earthquake ruptures in a shallow terminal basin. Here, we use subbottom compressed high intensity radiated pulse (Chirp) profiles and sedimentary cores to address questions related to how Great Salt Lake sediments respond to surface...
Authors
Christopher B. DuRoss, Daniel S. Brothers, Jessica A. Thompson Jobe, Richard Briggs, Drake Moore Singleton, Sylvia R. Nicovich, Alan Nelson, Jared W. Kluesner, Jason Scott Padgett
The use of an analog sclerometer to estimate strength of hard substrates supporting coastal communities The use of an analog sclerometer to estimate strength of hard substrates supporting coastal communities
In the marine environment, substrate differences such as ‘soft’ and ‘hard’ bottom result in different ecological communities. It is unclear, however, whether strength of hard bottom affects organism presence. To date, a limitation of many studies on organism-substrate interactions is the inability to measure rock strength in situ for marine substrates. Previous efforts involved...
Authors
Allison N. Cramer, Curt D. Storlazzi, Olivia Bible, Cannon Cline, Grace Leuchtenberger, Casey Smith, Corey Garza, Emily Carrington
Mapping winter cover crops using remote sensing of crop phenology Mapping winter cover crops using remote sensing of crop phenology
Winter cover crops (WCC) are an effective agricultural conservation practice for improving soil health and water quality. Several U.S. states have established incentive programs to promote planting WCC between cash crop rotations. In recent years, the area planted with WCC has steadily increased due to these efforts, although the planting area varies among states. Since these programs...
Authors
Feng Gao, Martha Anderson, Michael Cosh, Xuesong Zhang, Alison Thieme, W. Dean Hively, Jisung Chang, Haoteng Zhao, Richard Circone, Jyoti Jennewein