61 Works

Floral traits influence the opportunity for selection among male gametophytes: independent and combined effects of style length and petal area

Susan Mazer, Joseph Chellew & Kristen Peach
The data set included here was used for the analyses published in a paper titled, " American Journal of Botany, for which the abstract is as follows: PREMISE: Strong correlations between traits can obscure their independent effects on components of reproduction. Style length (SL) and petal area (PA) vary within species, for example, but their independent effects on the opportunity for selection among pollen genotypes are poorly understood. Previous work in Clarkia detected a positive...

Quantifying climate change impacts to City of Santa Barbara water supplies

Jessica Jagdeo, Juan Espinoza, Lydia Bleifuss & Camila Bobroff
Climate change affects water supply through changes in precipitation, temperature, and evapotranspiration. The City of Santa Barbara’s water supply relies largely on water held in Lake Cachuma and Gibraltar Reservoir, located in the upper Santa Ynez River watershed. Quantifying climate change impacts to this watershed is critical to planning for future water supply. This project modeled the potential impacts of climate change on the Santa Ynez River watershed out to 2058 using the Soil and...

Data from: Dermal denticle assemblages in coral reef sediments correlate with conventional shark surveys

Erin Dillon, Kevin Lafferty, Douglas McCauley, Darcy Bradley, Richard Norris, Jennifer Caselle, Graziella DiRenzo, Jonathan Gardner & Aaron O'Dea
It is challenging to assess long-term trends in mobile, long-lived, and relatively rare species such as sharks. Despite ongoing declines in many coastal shark populations, conventional surveys might be too fleeting and too recent to describe population trends over decades to millennia. Placing recent shark declines into historical context should improve management efforts as well as our understanding of past ecosystem dynamics. A new paleoecological approach for surveying shark abundance on coral reefs is to...

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...

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...

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...

Data from: Mechanisms of severe dieback and mortality in a classically drought-tolerant shrubland species (Arctostaphylos glauca)

Laura Drake-Schultheis
PREMISE Mortality events involving drought and pathogens in natural plant systems are on the rise due to global climate change. In the Santa Ynez mountain range in Santa Barbara County, California, USA, big berry manzanita (Arctostaphylos glauca) has experienced canopy dieback related to both a multi-year drought, and infection from fungal pathogens in the Botryosphaeriaceae family. METHODS A full factorial greenhouse experiment with four treatment groups (drought + inoculation; drought – inoculation; watering + inoculation;...

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...

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...

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....

Engineering crack tortuosity in polymer-polymer composites through ordered pores

Megan Valentine, Craig Hawker, Luke Gockowski, Neil Dolinski, Roberto Chavez, Noy Cohen, Fabian Eisenreich, Stefan Hecht & Robert McMeeking
Multimaterial additive manufacturing (or 3D printing) is an enabling tool for exploring structure-property relationships. In this work, a recently developed multimaterial printing approach, solution mask liquid lithography (SMaLL), is used to produce polymer-polymer composites inspired by tough, hierarchical structures found in nature. Triphasic composites comprised of a hard exterior “cuticle”, a soft interior “core,” and controlled pore size/structure are printed in a single step and their mechanical properties evaluated. The results of these tests demonstrate...

Mixed-species herding levels the landscape of fear

Keenan Stears, Melissa Schmitt, Christopher Wilmers & Adrian Shrader
Prey antipredator behaviours are influenced by perceived predation risk in a landscape and social information gleaned from herd mates regarding predation risk. It is well documented that high-quality social information about risk can come from heterospecific herd mates. Here, we integrate social information with the landscape of fear to quantify how these landscapes are modified by mixed-species herding. To do this, we investigated zebra vigilance in single- and mixed-species herds across different levels of predation...

Data from: Mating system and historical climate conditions affect population mean seed mass: evidence for adaptation and a new component of the selfing syndrome in Clarkia

Susan Mazer, Isaac Park, Matthew Kimura, Aaron Yim, Emma Maul & Kristen Peach
1. The evolution of seed size may be influenced by intrinsic attributes of populations, such as mating system, and extrinsic factors, such as climate. Several hypotheses propose that the evolution of self-fertilization from an outcrossing progenitor will be accompanied by a reduction in seed size, but this prediction has not been rigorously tested. Many studies report that the mean seed size of populations or taxa is associated with long-term climate conditions. Here, we examined the...

Variations in the Intensity and Spatial Extent of Tropical Cyclone Precipitation

Danielle Touma, Samantha Stevenson, Suzana J. Camargo, Daniel E. Horton & Noah S. Diffenbaugh
The intensity and spatial extent of tropical cyclone precipitation (TCP) often shapes the risk posed by landfalling storms. Here we provide a comprehensive climatology of landfalling TCP characteristics as a function of tropical cyclone strength, using daily precipitation station data and Atlantic US landfalling tropical cyclone tracks from 1900-2017. We analyze the intensity and spatial extent of ≥ 1 mm/day TCP (Z1) and ≥ 50 mm/day TCP (Z50) over land. We show that the highest...

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...

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...

The CALFISH database: open-sourcing a century of California’s non-confidential fisheries landings and participation data

Christopher Free, Camila Vargas Poulsen & Lyall Bellquist
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...

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...

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: 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.

High parasite diversity in the amphipod Gammarus lacustris in a subarctic lake

Jenny Shaw, Eirik Henriksen, Rune Knudsen, Jesper Kuhn, Armand Kuris, Kevin Lafferty, Anna Siwertsson, Miroslava Soldánová & Per-Arne Amundsen
Amphipods are often key species in aquatic food webs due to their functional roles in the ecosystem and as intermediate hosts for trophically transmitted parasites. Amphipods can also host many parasite species, yet few studies address the entire parasite community of a gammarid population, precluding a more dynamic understanding of the food web. We set out to identify and quantify the parasite community of Gammarus lacustris to understand the contributions of the amphipod and its...

Data from: The future of food from the sea

Tracey Mangin, Christopher Costello, Ling Cao, Stefan Gelcich, Miguel A. Cisneros-Mata, Christopher M. Free, Halley E. Froehlich, Christopher D. Golden, Gakushi Ishimura, Jason Maier, Ilan Macadam-Somer, Michael C. Melnychuk, Masanori Miyahara, Carryn L. De Moor, Rosamond Naylor, Linda Nøstbakken, Elena Ojea, Erin O’Reilly, Ana M. Parma, Andrew J. Plantinga, Shakuntala H. Thilsted & Jane Lubchenco
Global food demand is on the rise and serious questions remain about whether supply can increase sustainably. Land-based expansion is possible, but may exacerbate climate change and biodiversity loss and compromise the delivery of other ecosystem services. As food from the sea represents only 17% of current edible meat production, we ask: How much food can we expect the ocean to sustainably produce by 2050? We examine the main food-producing sectors in the ocean—wild fisheries,...

Protecting the global ocean for biodiversity, food and climate

Enric Sala, Juan Mayorga, Darcy Bradley, Reniel Cabral, Trisha Atwood, Arnaud Auber, William Cheung, Francesco Ferretti, Alan Friedlander, Steven Gaines, Cristina Garilao, Whitney Goodell, Benjamin Halpern, Audra Hinson, Kristin Kaschner, Kathleen Kesner-Reyes, Fabien Leprieur, Jennifer McGowan, Lance Morgan, David Mouillot, Juliano Palacios-Abrantes, Hugh Possingham, Kristin Rechberger, Boris Worm & Jane Lubchenco
The ocean contains unique biodiversity, provides valuable food resources, and is a major sink for anthropogenic carbon. Marine protected areas (MPAs) are an effective tool for restoring ocean biodiversity and ecosystem services but at present only 2.7% of the ocean is highly protected. This low level of ocean protection is due largely to conflicts with fisheries and other extractive uses. To address this issue, here we developed a conservation planning framework to prioritize highly protected...

Data from: Flexibility of fetal tolerance: Immune function during pregnancy varies between ecologically distinct populations

Carmen Hové, Benjamin Trumble, Amy Anderson, Jonathan Stieglitz, Hillard Kaplan, Michael Gurven & Aaron Blackwell
Background and objectives: Among placental mammals, females undergo immunological shifts during pregnancy to accommodate the fetus (i.e. fetal tolerance). Fetal tolerance has primarily been characterized within post-industrial populations experiencing evolutionarily novel conditions (e.g. reduced pathogen exposure), which may shape maternal response to fetal antigens. This study investigates how ecological conditions affect maternal immune status during pregnancy by comparing the direction and magnitude of immunological changes associated with each trimester among the Tsimane (a subsistence population...

Polyethylene upcycling to long-chain alkylaromatics by tandem hydrogenolysis/aromatization

Fan Zhang, Manhao Zeng, Ryan Yappert, Jiakai Sun, Yu-Hsuan Lee, Anne LaPointe, Baron Peters, Mahdi Abu-Omar & Susannah Scott
The current scale of plastics production and the accompanying waste disposal problems represent a largely untapped opportunity for chemical upcycling. Tandem catalytic conversion by Pt/g-Al2O3 converts various polyethylene grades in high yields (up to 80 wt%) to low molecular-weight liquid/wax products, in the absence of added solvent or H2, with little production of light gases. The major components are valuable long-chain alkylaromatics and alkylnaphthenes (average ca. C30, Ð = 1.1). Coupling exothermic hydrogenolysis with endothermic...

Registration Year

  • 2021
  • 2020
  • 2019

Resource Types

  • Dataset


  • University of California, Santa Barbara
  • United States Geological Survey
  • Stanford University
  • University of Colorado Boulder
  • Chapman University
  • Desert Botanical Garden
  • University of Queensland
  • Oregon State University
  • Northern Arizona University
  • Smithsonian Tropical Research Institute