63 Works

Glassy dynamics and memory effects in an intrinsically disordered protein construct

Ian Morgan, Ram Avinery, Gil Rahamim, Roy Beck & Omar Saleh
Glassy, nonexponential relaxations in globular proteins are typically attributed to conformational behaviors that are missing from intrinsically disordered proteins. Yet, we show that single molecules of a disordered-protein construct display two signatures of glassy dynamics, logarithmic relaxations and a Kovacs memory effect, in response to changes in applied tension. We attribute this to the presence of multiple independent local structures in the chain, which we corroborate with a model that correctly predicts the force-dependence of...

Sea otter sequence capture project data files

Annabel Beichman, Pooneh Kalhori, Christopher Kyriazis, Amber De Vries, Sergio Nigenda-Morales, Klaus-Peter Koepfli, Gisela Heckel, Yolanda Schramm, Andres Moreno-Estrada, Douglas Kennett, Mark Hylkema, James Bodkin, Kirk Lohmueller & Robert Wayne
Extinction or severe population contractions are rarely uniform across an entire species. However, because of the rapid onset of the fur trade in the 18th and 19th centuries, sea otters (Enhydra lutris) were systematically hunted to near extinction across their entire Northern Pacific range. Many sea otter populations were driven fully extinct, and the populations that survived suffered a rapid decline from 10-20,000 individuals per population to fewer than one hundred survivors. Each surviving remnant...

Fastq files related to publication: At Palmyra Atoll, the fish‐community environmental DNA signal changes across habitats but not with tides

Kevin D. Lafferty, Ana E. Garcia‐Vedrenne, John P. McLaughlin, Jasmine N. Childress, Marisa F. Morse & Christopher L. Jerde
At Palmyra Atoll, the environmental DNA (eDNA) signal on tidal sand flats was associated with fish biomass density and captured 98%–100% of the expected species diversity there. Although eDNA spilled over across habitats, species associated with reef habitat contributed more eDNA to reef sites than to sand-flat sites, and species associated with sand-flat habitat contributed more eDNA to sand-flat sites than to reef sites. Tides did not disrupt the sand-flat habitat signal. At least 25...

Imaging orbital ferromagnetism in a moire Chern insulator

Charles Tschirhart, Marec Serlin, Hryhoriy Polshyn, Avi Shragai, Zhengchao Xia, Jiacheng Zhu, Yuxuan Zhang, Kenji Watanabe, Takashi Taniguchi, Martin Huber & Andrea Young
Electrons in moire flat band systems can spontaneously break time reversal symmetry, giving rise to a quantized anomalous Hall effect. Here we use a superconducting quantum interference device to image stray magnetic fields in twisted bilayer graphene aligned to hexagonal boron nitride. We find a magnetization of several Bohr magnetons per charge carrier, demonstrating that the magnetism is primarily orbital in nature. Our measurements reveal a large change in the magnetization as the chemical potential...

Projected climate risk of aquatic food system benefits

Michelle Tigchelaar, William Cheung, Essam Mohammed, Michael Phillips, Hanna Payne, Elizabeth Selig, Colette Wabnitz, Muhammed Oyinlola, Thomas Frölicher, Jessica Gephart, Christopher Golden, Edward Allison, Abigail Bennett, Ling Cao, Jessica Fanzo, Benjamin Halpern, Fiorenza Micheli, Rosamond Naylor, Rashid Sumaila, Alessandro Tagliabue & Max Troell
Aquatic foods from marine and freshwater systems are critical to the nutrition, health, livelihoods, economies and culture of billions of people worldwide – but climate-related hazards may compromise their ability to provide these benefits. This analysis estimates national-level aquatic food system climate risk using a fuzzy logic modeling approach that connects climate hazards impacting marine and freshwater capture fisheries and aquaculture to their contributions to sustainable food system outcomes, and vulnerability to losing those contributions....

Isospin magnetism and spin-polarized superconductivity in Bernal bilayer graphene

Haoxin Zhou, Ludwig Holleis, Yu Saito, Liam Cohen, William Huynh, Caitlin Patterson, Fangyuan Yang, Takashi Taniguchi, Kenji Watanabe & Andrea Young
We report the observation of spin-polarized superconductivity in Bernal bilayer graphene when doped to a saddle-point van Hove singularity generated by large applied perpendicular electric field. We observe a cascade of electrostatic gate-tuned transitions between electronic phases distinguished by their polarization within the isospin space defined by the combination of the spin and momentum-space valley degrees of freedom. While all of these phases are metallic at zero magnetic field, we observe a transition to a...

Analyzing environmental and social impacts of urban forestry practices in Tacoma, WA with PlanIT Geo

Joanne Pham, Veronica Weber & Rachel Conway
Urban forestry encompasses street trees, residential trees, park trees and greenbelt vegetation. Despite local groups’ efforts and trends in better forest management practices, there is an unequal distribution of urban forests and their associated ecosystem services across most of the United States. Evaluating canopy distribution is the first step to enable cities to better devote limited resources to marginalized communities, which often have additional equity concerns. Our project will help the urban forestry nonprofit, PlanIT...

Causes of delayed outbreak responses and their impacts on epidemic spread

Yun Tao, Matthew Ferrari, Katriona Shea, William Probeert, Michael Runge, Kevin Lafferty & Michael Tildesley
Livestock diseases have devastating consequences economically, socially, and politically across the globe. In certain systems, pathogens remain viable after host death, which enables residual transmissions from infected carcasses. Rapid culling and carcass disposal are well-established strategies for stamping out an outbreak and limiting its impact, however, wait-times for these procedures, i.e., response delays, are typically farm-specific and time-varying due to logistical constraints. Failing to incorporate variable response delays in epidemiological models may understate outbreak projections...

Land use impacts on parasitic infection: A cross-sectional epidemiological study on the role of irrigated agriculture in schistosome infection in a dammed landscape

Andrea Lund, David Rehkopf, Susanne Sokolow, M. Moustapha Sam, Nicolas Jouanard, Anne-Marie Schacht, Simon Senghor, Assane Fall, Gilles Riveau, Giulio De Leo & David Lopez-Carr
Background: Water resources development promotes agricultural expansion and food security. But are these benefits offset by increased infectious disease risk? Dam construction on the Senegal River in 1986 was followed by agricultural expansion and increased transmission of human schistosomes. Yet the mechanisms linking these processes at the individual and household levels remain unclear. We investigated the association between household land use and schistosome infection in children. Methods: We analyzed cross-sectional household survey data (n =...

Putative resistance and tolerance mechanisms have little impact on disease progression for an emerging salamander pathogen

Mark Wilber, Edward Carter, Matthew Gray & Cheryl Briggs
1. Resistance and tolerance are unique host defense strategies that can limit the impacts of a pathogen on a host. However, for most wildlife-pathogen systems there are still fundamental uncertainties regarding 1) how changes in resistance and tolerance can affect disease outcomes and 2) the mechanisms underlying resistance and tolerance in host populations. 2. Here, we first compared observed patterns of resistance and tolerance and their effects on disease outcomes among salamander species that are...

Teaching undergraduates with quantitative data in the social sciences at University of California Santa Barbara

Renata Gonçalves Curty, Rebecca Greer & Torin White
The interview data was gathered for a project that investigated the practices of instructors who use quantitative data to teach undergraduate courses within the Social Sciences. The study was undertaken by employees of the University of California, Santa Barbara (UCSB) Library, who participated in this research project with 19 other colleges and universities across the U.S. under the direction of Ithaka S+R. Ithaka S+R is a New York-based research organization, which, among other goals, seeks...

Microbarom low-frequency data products of the International Monitoring System’s infrasound stations

Patrick Hupe, Lars Ceranna, Alexis Le Pichon, Robin Matoza & Pierrick Mialle
This data series consists of data products derived from broadband signal detection lists that have been processed for the certified infrasound stations of the International Monitoring System. More specifically, this data series covers the dominant frequency range of microbaroms (0.15-0.35 Hz) and is therefore called the ‘mb_lf’ product. The temporal resolution (time step and window length) is 15 min. For processing the infrasound data, the Progressive Multi-Channel Correlation (PMCC) array processing algorithm with a one-third...

Data From: Tactile Echoes: Multisensory Augmented Reality for the Hand

Anzu Kawazoe, Gregory Reardon, Erin Woo, Massimiliano Di Luca & Yon Visell
Touch interactions are central to many human activities, but there are few technologies for computationally augmenting free-hand interactions with real environments. Here, we describe Tactile Echoes, a finger-wearable system for augmenting touch interactions with physical objects. This system captures and processes touch-elicited vibrations in real-time in order to enliven tactile experiences. We process these signals via a parametric signal processing network in order to generate responsive tactile and auditory feedback. Just as acoustic echoes are...

Historical and Forecast Land use Data for Ibadan, Nigeria 1984 - 2040

Damilola Eyelade, Keith Clarke & Ighodalo Ijagbone
The SLEUTH model was implemented for Ibadan Nigeria, a city in West Africa with a mostly unregulated growth trajectory. The input physiographic and historical data for SLEUTH was compiled at spatial resolutions ranging between 15m – 90m. The temporal resolution of inputs was based on 35 years of historical data spanning the years 1984 to 2020. The urban (built-up commercial, residential, and industrial) land use increased almost four-fold from 3.0% of the total area in...

The CALFISH database: A century of California's non-confidential fisheries landings and participation data

Christopher M. Free, Camila Vargas Poulsen, Lyall F. Bellquist, Sophia N. Wassermann & Kiva L. Oken
California's commercial and recreational fisheries support vibrant coastal economies and communities. Maintaining healthy fishing communities into the future requires a detailed understanding of their past. The California Department of Fish and Wildlife (CDFW) has been monitoring statewide fisheries landings and participation since 1916 and releases confidential versions of this data through authorized data requests and non-confidential summaries of this data in its quasi-annual landings reports. The non-confidential data published in the landings reports provide a...

Epistolary Pamphlets

Rachael King & Edwin Roland
These spreadsheets show the results of an effort to identify the epistolary pamphlet genre within the ECCO-TCP database. Sheet 1 shows the model's predictions of whether a particular text was an epistolary pamphlet while Sheet 2 identifies the tokens used to build the model. Overall, the model was able to identify the genre with 76 percent accuracy.

Data from: A food web including parasites for kelp forests of the Santa Barbara Channel, California

Dana Morton, Cristiana Antonino, Farallon Broughton, Dykman Lauren, Armand Kuris & Kevin Lafferty
We built a high-resolution topological food web for the kelp forests of the Santa Barbara Channel, California, USA that includes parasites and significantly improves resolution compared to previous webs. The 1,098 nodes and 21,956 links in the web describe an economically, socially, and ecologically vital system. Nodes are broken into life-stages. There are 549 free-living life-stages (comprising 492 species from 21 Phyla) and 549 parasitic life-stages (comprising 450 species from 10 Phyla). Links represent three...

Diet mediates thermal performance traits: implications for marine ectotherms

Emily Hardison, Emily A Hardison, Krista Kraskura, Jacey Van Wert, Tina Nguyen & Erika J Eliason
Thermal acclimation is a key process enabling ectotherms to cope with temperature change. To undergo a successful acclimation response, ectotherms require energy and nutritional building blocks obtained from their diet. However, diet is often overlooked as a factor that can alter acclimation responses. Using a temperate omnivorous fish, opaleye (Girella nigricans), as a model system, we tested the hypotheses that 1) diet can impact the magnitude of thermal acclimation responses and 2) traits vary in...

Data from: Strong evidence for an intraspecific metabolic scaling coefficient near 0.89 in fish

Krista Kraskura, Christopher Jerde & Erika Eliason
We curated standard metabolic rate measurements of individual fish, temperature, and body mass. The database is grouped by studies, with independent trials, and fish species. The databse includes a total of n = 1456 observations that were used to quantify the body mass – metabolic rate relationship in fishes using the evidential approach to statistical inference.

Predator-prey interactions of terrestrial invertebrates are determined by predator body size and species identity

Ana Miller-Ter Kuile, Austen Apigo, An Bui, Bartholomew DiFiore, Elizabeth Forbes, Michelle Lee, Devyn Orr, Daniel Preston, Rachel Behm, Taylor Bogar, Jasmine Childress, Rodolfo Dirzo, Maggie Klope, Kevin Lafferty, John McLaughlin, Marisa Morse, Carina Motta, Kevin Park, Katherine Plummer, David Weber, Ronald Young & Hillary Young
Predator-prey interactions shape ecosystem and can help maintain biodiversity. However, for many of the earth’s most biodiverse and abundant organisms, including terrestrial arthropods, these interactions are difficult or impossible to observe directly with traditional approaches. Based on previous theory, it is likely that predator-prey interactions for these organisms are shaped by a combination of predator traits, including body size and species-specific hunting strategies. In this study, we combined diet DNA metabarcoding data of 173 individual...

Parasites in kelp-forest food webs increase food-chain length, complexity, and specialization, but reduce connectance

Dana Morton & Kevin Lafferty
We explored whether parasites are important in kelp forests by examining their effects on a high-quality, high-resolution kelp-forest food web. After controlling for generic effects of network size, parasites affected kelp-forest food web structure in some ways consistent with other systems. Parasites increased the trophic span of web, increasing top predator vulnerability and the longest chain length. Unique links associated with parasites, such as concomitant predation (consumption of parasites along with their hosts by predators)...

Relationships of climate, human activity, and fire history to spatiotemporal variation in annual fire probability across California: Source Code and Core Data

Isaac Park, Michael Mann, Lorraine Flint, Alan Flint & Max Moritz
In the face of recent wildfires across the Western United States, it is essential that we understand both the dynamics that drive the spatial distribution of wildfire, and the major obstacles to modeling the probability of wildfire over space and time. However, it is well documented that the precise relationships of local vegetation, climate, and ignitions, and how they influence fire dynamics, may vary over space and among local climate, vegetation, and land use regimes....

Supporting information for: A pilot experiment on infrasonic lahar detection at Mount Adams, Cascades: Ambient infrasound and wind-noise characterization at a quiescent stratovolcano: time-lapse camera images

Richard Sanderson, Robin Matoza, Rachel Haymon & Jamison Steidl
Erosion, hydrothermal activity, and magmatism at volcanoes can cause large and unexpected mass wasting events. Large fluidized debris flows have occurred within the past 6,000 years at Mount Adams, WA, and present a hazard to communities downstream. In August 2017, we began a pilot experiment to investigate the potential of infrasound arrays for detecting and tracking debris flows at Mount Adams. We deployed a telemetered 4-element infrasound array (BEAR, 85-m aperture) ~11 km from a...

Microbarom high-frequency data products of the International Monitoring System’s infrasound stations

Patrick Hupe, Lars Ceranna, Alexis Le Pichon, Robin Matoza & Pierrick Mialle
This data series consists of data products derived from broadband signal detection lists that have been processed for the certified infrasound stations of the International Monitoring System. More specifically, this data series covers, among other phenomena, the upper frequency range of microbaroms (0.45-0.65 Hz) and is therefore called the ‘mb_hf’ product. The temporal resolution (time step and window length) is 15 min. For processing the infrasound data, the Progressive Multi-Channel Correlation (PMCC) array processing algorithm...

Higher frequency data products of the International Monitoring System’s infrasound stations

Patrick Hupe, Lars Ceranna, Alexis Le Pichon, Robin Matoza & Pierrick Mialle
This data series consists of data products derived from broadband signal detection lists that have been processed for the certified infrasound stations of the International Monitoring System. More specifically, within the CTBT-relevant infrasound range (around 0.01-4 Hz), this data series covers higher frequencies (1-3 Hz) and is therefore called the ‘hf’ product. The temporal resolution (time step and window length) is 5 min. For processing the infrasound data, the Progressive Multi-Channel Correlation (PMCC) array processing...

Registration Year

  • 2021
    63

Resource Types

  • Dataset
    56
  • Text
    6
  • Preprint
    1

Affiliations

  • University of California, Santa Barbara
    63
  • Stanford University
    6
  • United States Geological Survey
    4
  • University of British Columbia
    4
  • University of Washington
    3
  • Atomic Energy and Alternative Energies Commission
    3
  • University of Queensland
    3
  • University of Colorado Boulder
    3
  • Federal Institute for Geosciences and Natural Resources
    3
  • California State University, Long Beach
    2