21 Works

Structure and distribution of chalky deposits in the Pacific oyster using x-ray computed tomography (CT)

Roxanne Banker & Dawn Sumner
Oysters are unusual among bivalves in that they possess chambers, often filled with soft, chalky calcite, that are irregularly scattered throughout the shell. Because the function of these so-called chalky deposits is still unclear, evaluating the growth and distribution of chalk is important for elucidating the ecological function of this unique shell trait. Specimens of the Pacific oyster Magallana gigas, an oyster well known for chalk expression, were grown in Bodega Harbor, Bodega Bay, CA....

Data from: The utility of climatic water balance for ecological inference depends on vegetation physiology assumptions

Derek Young, Sean Jeronimo, Derek Churchill, Van Kane & Andrew Latimer
Background: In modeling and explaining spatial vegetation patterns, ecologists have increasingly favored the use of climatic water balance variables, including actual evapotranspiration (AET) and climatic water deficit (CWD), for representing the hydrologic and energetic environment experienced by plants. Much of the interest in these variables lies in their hypothesized potential to characterize biologically relevant environmental variation more directly than simple climate variables such as precipitation and temperature. Practically, obtaining AET and CWD values across space...

Genetic structure in a cnidarian symbiont is correlated with geographic location, environment, and host species

Brendan Cornwell & Luis Hernández
Corals and cnidarians form symbioses with dinoflagellates across a wide range of habitats from the tropics to temperate zones. Notably, these partnerships create the foundation of coral reef ecosystems and are at risk of breaking down due to climate change. This symbiosis couples the fitness of the partners, where adaptations in one species can benefit the holobiont. However, the scales over which each partner can match their current - and future - environment are largely...

Data for project: A quantitative investigation into the impact of partially automated vehicles on vehicle miles travelled in California

Scott Hardman
We investigate travel changes in partially automated electric vehicles. Partial automation can control vehicle speed and steering using sensors that monitor the external environment. We use survey results from survey responses including 940 users of partial automation, including 628 who have Tesla Autopilot and 312 with systems from other automakers. Autopilot users report using automation more than users of other partial automation systems. Autopilot has the largest impact on travel, notably 36% of Autopilot users...

CNS isotope values in eye lenses for juvenile and adult Chinook Salmon

Miranda Bell Tilcock, Carson Jeffres, Andrew Rypel, Ted Sommer, Jacob Katz, George Whitman & Rachel Johnson
Tracking habitat use and dietary shifts in migratory species is vital to conservation and management. Yet conventional animal tracking often precludes tracking small juveniles at critical life-stages where recruitment bottlenecks often manifest. Stable isotope analysis (SIA) in consecutive laminae in eye lenses, a protein-rich depositional tissue, has emerged as a promising tool in fishes to develop long-term interpretive records of dietary histories using a single archival tissue. Currently, studies using fisheye lenses to study SIA...

Data from: Expiratory aerosol particle escape from surgical masks due to imperfect sealing

Christopher Cappa, Sima Asadi, Anthony Wexler, Santiago Barreda & Nicole Bouvier
The dataset provided here is associated with the work "Expiratory aerosol particle escape from surgical masks due to imperfect sealing," by Cappa et al, currently available as a preprint at https://doi.org/10.21203/rs.3.rs-142138/v1. This includes measurements made of the influence of surgical masks and leakage flows out the mask sides on the emission of micron-scale aerosols from various expiratory activities (coughing, speaking). The dataset provided here includes *.txt files exported from an Aerodynamic Particle Sizer that contain...

Data from: Rare instances of haploid inducer DNA in potato dihaploids and ploidy-dependent genome instability

Kirk Amundson
In cultivated tetraploid potato, reduction to diploidy (dihaploidy) allows hybridization to diploid germplasm, introgression breeding, and may facilitate the production of inbreds. Pollination with haploid inducers yields maternal dihaploids, as well as triploid and tetraploid hybrids. It is not known if dihaploids result from parthenogenesis, entailing development of embryos from unfertilized eggs, or genome elimination, entailing missegregation and loss of paternal chromosomes. A sign of genome elimination is the occasional persistence of haploid inducer DNA...

Environmental metadata for: 2019/2020 biomineral sampling of drainpipes from California public rest areas

Kahui Lim, Harold Leverenz, Cara Wademan & Samantha Barnum
Clogging and odor is strongly associated with ureolytic biomineralization in waterless and low-flow urinal drainage systems in high usage settings. These blockages continue to hinder widespread waterless and low-flow urinal adoption due to subsequent high maintenance requirements and hygiene concerns. Through field observations, hypothesis testing, and multiple regression analysis, this study attempts to characterize, for the first time, the ureolytic activity of the biomineralization found in alternative cated at 9 State-owned restrooms. Multiple regression analysis...

Age affects strain-rate dependence of the mechanical properties of kelp tissue

Nicholas Burnett & M.A.R. Koehl
Premise: The resistance of macroalgae to hydrodynamic forces imposed by ambient water motion depends in part on the mechanical properties of their tissues. In wave-swept habitats, tissues are stretched (strained) at different rates as hydrodynamic forces constantly change. Kelp have tissues of different ages, and mechanical properties of kelp tissue change with age. However, the effects of age on the strain-rate dependence of the mechanical behavior of kelp tissues is unknown. Methods: Using the kelp...

Data and analysis scripts for: Asymmetrical reproductive barriers in sympatric Jewelflowers: are floral isolation, genetic incompatibilities, and floral trait displacement connected?

Kyle Christie
Floral visitors influence reproductive interactions among sympatric plant species, either by facilitating assortative mating and contributing to reproductive isolation, or by promoting heterospecific pollen transfer, potentially leading to reproductive interference or hybridization. We assessed preference and constancy of floral visitors on two co-occurring Jewelflowers (Streptanthus breweri and S. hesperidis, Brassicaceae) using field arrays, and quantified two floral rewards potentially important to foraging choice – pollen production and nectar sugar concentration – in a greenhouse common...

Example data for ERP Analysis Book

Steven J Luck

Davis Amtrak station pilot project evaluation

Susan Pike
This study investigates barriers to accessing the Davis Amtrak Station to inform a program designed to increase access to the station with on-demand alternatives. The program aims to decrease private vehicle use to access the station and for travel to locations outside of Davis through partnerships with a carpool/rideshare app, as well as a ridehail app. Motivations for the program stem from the high passenger usage at the Davis station that may be impacted by...

Comparative analysis of pesticide use across California crops

Jay Rosenheim, Bodil Cass, Hanna Kahl & Kimberly Steinmann
Pesticide use is a key component of efficient crop production, but is associated with a suite of costs. Understanding the main drivers of pesticide use will help us target research to develop effective alternatives. Although economic models predict, and empirical tests confirm, that the value of the crop being protected is an important determinant of between crop variation in pesticide use, previous tests of this prediction have examined only modest numbers of crops and have...

Penn World Table 10.0

Robert Inklaar Robert C. Feenstra

Tick parasitism impairs contest behavior in the western fence lizard (Sceloporus occidentalis)

Dylan Lanser
Parasites may impair host behavior in ways that reduce host fitness, especially when access to territories or mates becomes disrupted. Western fence lizards (Sceloporus occidentalis) are a key host to western black-legged ticks (Ixodes pacificus). Males are highly aggressive during the mating season, competing with rivals through displays of color badges, pushups, and other behaviors. We hypothesized that experimental tick infestation diminishes the performance of male western fence lizards in intrasexual contests, via either blood...

A case study for the implementation of an integrated variable speed limit (VSL) control strategy in a freeway section of I-80 based on SUMO simulations

Hang Gao & Michael Zhang
This project aims at reducing fuel consumption and greenhouse gas emission by applying variable speed control (VSL) strategies to the traffic corridors with multi-segment and multi-bottleneck. The dataset is composed of inputs and outputs of the SUMO simulation model via TraCI API. SUMO is a microscopic traffic simulation platform which allows to simulate a given traffic demand through a given network. Namely, the inputs consist of the vehicle trip data obtained from the PeMS database...

The non-traditional Coriolis terms and tropical convective clouds

Matthew Igel
The full, three-dimensional Coriolis force includes the familiar sine-of-latitude terms as well as frequently dropped cosine-of-latitude terms (Nontraditional Coriolis Terms [NCT]). The latter are often ignored because they couple the zonal and vertical momentum equations which in the large-scale limit of weak vertical velocity is considered insignificant almost everywhere. Here, we ask whether equatorial mesoscale clouds which fall outside the large-scale limit are affected by the NCT. A simple scaling indicates that a Lagrangian parcel...

A solitary ground-nesting wasp truncates its parental investment in response to detection of parasites

Jay Rosenheim
1. Parental investment by solitary nest-building wasps and bees is predicted to be plastic, responding to variation in the sex of the offspring, the availability of food used as provisions (‘resource limitation’), the female’s inventory of mature oocytes (‘egg limitation’), and risk imposed by nest parasites. 2. I observed nest provisioning by Ammophila dysmica, a solitary, ground-nesting wasp that provisions its nest with one or two caterpillar prey to evaluate the hypotheses that provisioning is...

Phylogenomics and biogeography of leptonetid spiders (Araneae : Leptonetidae)

Jason Bond, Joel Ledford & Marshal Hedin
Leptonetidae are rarely encountered spiders, usually associated with caves and mesic habitats, and are disjunctly distributed across the Holarctic. Data from ultraconserved elements (UCEs) were used in concatenated and coalescent-based analyses to estimate the phylogenetic history of the family. Our taxon sample included close outgroups, and 90% of described leptonetid genera, with denser sampling in North America and Mediterranean Europe. Two data matrices were assembled and analysed; the first ‘relaxed’ matrix includes the maximum number...

Data from: The effects of temperature on the kinematics of rattlesnake predatory strikes in both captive and field environments

Malachi Whitford, Grace Freymiller, Timothy Higham & Rulon Clark
The outcomes of predator-prey interactions between endotherms and ectotherms can be heavily influenced by environmental temperature, owing to the difference in how body temperature affects locomotor performance. However, as elastic energy storage mechanisms can allow ectotherms to maintain high levels of performance at cooler body temperatures, detailed analyses of kinematics are necessary to fully understand how changes in temperature might alter endotherm-ectotherm predator-prey interactions. Viperid snakes are widely distributed ectothermic mesopredators that interact with endotherms...

Phylogenomic species delimitation in the ants of the Temnothorax salvini Group (Hymenoptera: Formicidae): An integrative approach

Matthew Prebus
The members of the Temnothorax salvini species group are rarely collected, arboreally nesting ants of Central American forests. Previously thought to consist of two broadly dispersed species, recent collections have revealed a diversity of specimens that defy the two-species salvini group concept, but these are difficult to distinguish from each other based solely on morphology. I contrast several model-based approaches to species delimitation based on target-enriched genomic data. With molecular data from thousands of ultraconserved...

Registration Year

  • 2021

Resource Types

  • Dataset


  • University of California, Davis
  • San Diego State University
  • University of Washington
  • Universidad Autónoma de Baja California Sur
  • University of California, Berkeley
  • California Department of Pesticide Regulation
  • National Marine Fisheries Service
  • Arizona State University
  • University of California, Riverside
  • Mount Sinai Health System