145 Works

A Benchmark Data Set for Hydrogen Combustion

Akshaya Das, Christopher J. Stein, Farnaz Heidar-Zadeh, Luke Bertels, Meili Liu, Xingyi Guan, Mojtaba Haghighatlari, Jie Li, Oufan Zhang, Hongxia Hao, Itai Leven, Martin Head-Gordon & Teresa Head-Gordon

Dataset for: Factory Benefits to Paying Workers More: The Critical Role of Compensation Systems in Apparel Manufacturing

Niklas Lollo & Dara O'Rourke
While many stakeholders believe worker wages in global supply chains are too low, there is disagreement about what, if anything, can be done to raise wages. Through a two-year quasi-experiment in an operating apparel factory, we assess the effects on productivity and profits of raising worker wages with a re-designed compensation system. We show that, even within current factory margins and constraints, important wage gains (4.2–9.7%) are possible and profitable. Productivity increased 8–10%-points while turnover...

Ecological basis and genetic architecture of crypsis polymorphism in the desert clicker grasshopper (Ligurotettix coquilletti)

Timothy O'Connor, Marissa Sandoval, Jiarui Wang, Jacob Hans, Risa Takenaka, & Noah Whiteman
Color polymorphic species can offer exceptional insight into the ecology and genetics of adaptation. Although the genetic architecture of animal coloration is diverse, many color polymorphisms are associated with large structural variants and maintained by biotic interactions. Grasshoppers are notably polymorphic in both color and karyotype, making them excellent models for understanding the ecological drivers and genetic underpinnings of color variation. Banded and uniform morphs of the desert clicker grasshopper (Ligurotettix coquilletti) are found across...

Cytotype and genotype predict mortality and recruitment in Colorado quaking aspen (Populus tremuloides)

Benjamin Blonder, Courtenay Ray, James Walton, Marco Castaneda, K. Dana Chadwick, Michael Clyne, Pierre Gaüzere, Lars Iversen, Madison Lusk, G. Richard Strimbeck, Savannah Troy & Karen Mock
Species responses to climate change depend on environment, genetics, and interactions among these factors. Intraspecific cytotype (ploidy level) variation is a common type of genetic variation in many species. However, the importance of intraspecific cytotype variation in determining demography across environments is poorly known. We studied the tree species quaking aspen (Populus tremuloides), which occurs in diploid and triploid cytotypes. This widespread species is experiencing contractions in its western range, which could potentially be linked...

A vertebrate adaptive radiation is assembled from an ancient and disjunct spatiotemporal landscape

Emilie Richards
To investigate the origins and stages of vertebrate adaptive radiation, we reconstructed the spatial and temporal histories of adaptive alleles underlying major phenotypic axes of diversification from the genomes of 202 Caribbean pupfishes. On a single Bahamian island, ancient standing variation from disjunct geographic sources was reassembled into new combinations under strong directional selection for adaptation to novel trophic niches of scale-eating and molluscivory. We found evidence for two longstanding hypotheses of adaptive radiation: hybrid...

GEOS-Chem nested simulation over the Kīlauea volcanic plume

Chi Li & Ronald Cohen
This dataset contains the GEOS-Chem chemical transport model (version 12.8.2) simulation that guides the interpretation of the abundance and source and sink processes affecting sulfur dioxide and sulfate aerosols from the volcanic plume regime during May-September 2008 in Li and Cohen (2021) and can be analyzed using codes at https://github.com/ChiLi90/LifetimeFit/tree/master.

Data from: Table-top extreme ultraviolet second harmonic generation

Michael Zuerch
The lack of available table-top extreme ultraviolet (XUV) sources with high enough fluxes and coherence properties have limited the availability of nonlinear XUV and x-ray spectroscopies to free electron lasers (FEL). Here, we demonstrate second harmonic generation (SHG) on a table-top XUV source for the first time by observing SHG near the Ti M2,3-edge with a high-harmonic seeded soft x-ray laser (HHG-SXRL). Further, this experiment represents the first SHG experiment in the XUV. First-principles electronic...

Snow modulates winter energy use and cold exposure across an elevation gradient in a montane ectotherm

Kevin Roberts, Nathan Rank, Elizabeth Dahlhoff, Jonathon Stillman & Caroline Williams
Snow insulates the soil from air temperature, decreasing winter cold stress and altering energy use for organisms that overwinter in the soil. As climate change alters snowpack and air temperatures, it is critical to account for the role of snow in modulating vulnerability to winter climate change. Along elevational gradients in snowy mountains, snow cover increases but air temperature decreases, and it is unknown how these opposing gradients impact performance and fitness of organisms overwintering...

Data for: Human food use increases plant geographic ranges in the Sonoran Desert

Benjamin Blonder, Carolyn Flower, Wendy Hodgson, Andrew Salywon, Brian Maitner, Brian Enquist & Matthew Peeples
Aim. Climate is usually regarded as the main determinant of plant species’ distributions. However, past human use of species for food also may have influenced distributions. We hypothesized that human-mediated dispersal has resulted in food plants occupying more of their potential geographic range. We also hypothesized that key ecological traits could predispose a species to occupy more of its potential climatic geographic range and be selected by humans for food. Location. The Sonoran Desert of...

Data for: Radiative feedbacks on land surface change and associated tropical precipitation shifts

Marysa Lague, William Boos & Abigail Swann
Changes in land surface albedo and land surface evaporation modulate the atmospheric energy budget by changing temperatures, water vapor, clouds, snow and ice cover, and the partitioning of surface energy fluxes. Here idealized perturbations to land surface properties are imposed in a global model to understand how such forcings drive shifts in zonal mean atmospheric energy transport and zonal mean tropical precipitation. For a uniform decrease in global land albedo, the albedo forcing and a...

Microsatellite data from various African buffalo (Syncerus caffer) populations throughout Africa

Pim Van Hooft, Wayne Getz, Ben Greyling, Rasmus Heller, Knut Røed & Armanda Bastos
1280 African buffalo (Syncerus caffer) samples genotyped with up to 19 microsatellites. 1275 samples are from East (12 populations) and southern Africa (4 populations). 5 samples are from central Africa (2 populations).

Proximity to crop relatives determines patterns of natural selection in a wild sunflower

Nora Mitchell, Scott Chamberlain & Kenneth Whitney
Abiotic and biotic heterogeneity result in divergent patterns of natural selection in nature, with important consequences for fundamental evolutionary processes including local adaptation, speciation and diversification. However, increasing amounts of the global terrestrial surface are homogenized by agriculture (which covers nearly 50% of terrestrial vegetated land surface) and other anthropogenic activities. Agricultural intensification leads to highly simplified biotic communities for many taxa, which may alter natural selection through biotic selective agents. In particular, the presence...

Pierce's disease vector transmission-preference experiment on PdR1 resistant grapevines

Adam Zeilinger, Dylan Beal, Anne Sicard, Christopher Wallis, M. Andrew Walker & Rodrigo Almeida
Host defense against vector-borne plant pathogens is a critical component of integrated disease management. However, theory predicts that traits that confer tolerance or partial resistance can, under certain ecological conditions, enhance the spread of pathogens and spillover to more susceptible populations or cultivars. A key component driving such epidemic risk appears to be variation in host selection behavior of vectors based on infection status of the host. While recent theory has further emphasized the importance...

Analyses on the fungus-farming termite, Macrotermes natalensis

Mark Harrison, Mireille Vassuer-Cognet, Sarah Seite, David Sillam-Dussès, Roland Lupoli, Alain Robert, Laure-Anne Poissonnier, Tom Van Dooren, Arnaud Lemainque, David Renault, Sebastien Acket, Muriel Andrieu, Jose Viscarra, Hei Sook Sul, Wilhelm De Beer & Erich Bornberg-Bauer
Kings and queens of eusocial termites can live for decades, while queens sustain a nearly maximal fertility. To investigate the molecular mechanisms underlying their long lifespan, we carried out transcriptomics, lipidomics and metabolomics in Macrotermes natalensis on sterile short-lived workers, long-lived kings and five stages spanning twenty years of adult queen maturation. Reproductives share gene expression differences from workers in agreement with a reduction of several aging-related processes, involving upregulation of DNA damage repair and...

Spatial phylogenetics of butterflies in relation to environmental drivers and angiosperm diversity across North America

Chandra Earl, Michael W. Belitz, Shawn W. Laffan, Vijay Barve, Narayani Barve, Douglas E. Soltis, Julie M. Allen, Pamela S. Soltis, Brent D. Mishler, Akito Y. Kawahara & Robert Guralnick
Broad-scale quantitative assessments of biodiversity and the factors shaping it remain particularly poorly explored in insects. Here, we undertook a spatial phylogenetic analysis of North American butterflies via assembly of a time-calibrated phylogeny of the region coupled with a unique, complete range assessment for ~75% of the known species. We utilized a suite of phylodiversity metrics and associated environmental data to test whether climate stability and temperature gradients have shaped North American butterfly phylogenetic diversity...

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...

ddRAD of Hawaiian Ariamnes spiders

Ellie Armstrong, Benoît Perez-Lamarque, Ke Bi, Leontine Becking, Jun Lim, Tyler Linderoth, Rosemary Gillespie & Henrik Krehenwinkel
The diversification of a host organism can be influenced by both the external environment and its assemblage of microbes. Here, we use a young lineage of spiders, coupled with a chronologically arranged series of volcanic mountains, to determine the evolutionary history of a host and its associated microbial communities, altogether forming the “holobiont”. Using the stick spider Ariamnes waikula (Araneae, Theridiidae) on the island of Hawaiʻi, and outgroup taxa on older islands, we tested whether...

Data from: Temporal scale of habitat selection for large carnivores: Balancing energetics, risk and finding prey

Anna Nisi, Justin Suraci, Nathan Ranc, Laurence Frank, Alayne Oriol-Cotterill, Steven Ekwanga, Terrie Williams & Christopher Wilmers
1. When navigating heterogeneous landscapes, large carnivores must balance trade-offs between multiple goals, including minimizing energetic expenditure, maintaining access to hunting opportunities, and avoiding potential risk from humans. The relative importance of these goals in driving carnivore movement likely changes across temporal scales, but our understanding of these dynamics remains limited. 2. Here we quantified how drivers of movement and habitat selection changed with temporal grain for two large carnivore species living in human-dominated landscapes,...

Chromosome evolution and the genetic basis of agronomically important traits in greater yam

Jessen Bredeson, Jessica Lyons, Ibukun Oniyinde, Nneka Okereke, Olufisayo Kolade, Ikenna Nnabue, Nneka Okereke, Christian Nwadili, Eva Hribova, Matthew Parker, Jeremiah Nwogha, Shengqiang Shu, Joseph Carlson, Robert Kariba, Samuel Muthemba, Katarzyna Knop, Geoffrey Barton, Anna Sherwood, Antonio Lopez-Montes, Robert Asiedu, Ramni Jamnadass, Alice Muchugi, David Goodstein, Chiedozie Egesi, Jonathan Featherston … & Daniel Rokhsar
The nutrient-rich tubers of the greater yam, Dioscorea alata L., provide food and income security for millions of people around the world. Despite its global importance, however, greater yam remains an ‘orphan crop.’ Here we address this resource gap by presenting a highly contiguous chromosome-scale genome assembly of D. alata combined with a dense genetic map derived from African breeding populations. The genome sequence reveals an ancient allotetraploidization in the Dioscorea lineage, followed by extensive...

Data and supporting information from: Higher metabolic plasticity in temperate compared to tropical lizards suggests increased resilience to climate change

Baojun Sun, Caroline Williams, Teng Li, John Speakman, Zengguang Jin, Hongliang Lu, Laigao Luo & Weiguo Du
We investigate thermal acclimation of three species of Takydromus lizards distributed along a broad latitudinal gradient in China. The dataset are including metabolic rates, organ size, mitochondrial respiration, Cox activities, proteomic and metabolomic regulations of three Takydromus lizards after warm and cold acclimation in the laboratory. See details in related paper.

Data supporting: Synthesis of higher order feature codes through stimulus-specific supra-linear summation

Daniel Mossing, Evan Lyall & Hillel Adesnik
How cortical circuits build representations of complex objects is poorly understood. The massive dimensional expansion from the thalamus to the primary sensory cortex may enable sparse, comprehensive representations of higher order features to facilitate object identification. To generate such a code, cortical neurons must integrate broadly over space, yet simultaneously obtain sharp tuning to specific stimulus features. The logic of cortical integration that may synthesize such a sparse, high dimensional code for complex features is...

Data from: Community-level responses of African carnivores to prescribed burning

Laura Gigliotti, Goncalo Curveira-Santos, Rob Slotow, Craig Sholto-Douglas, Lourens Swanepoel & David Jachowski
Fires are common in many ecosystems worldwide, and are frequently used as a management tool. Although the responses of herbivores to fire have been well-studied, the responses of carnivores to fire remain unclear. In particular, post-fire habitat changes, and the associated changes in prey availability, might affect the coexistence or competition of carnivore species within the larger carnivore community, but few studies have focused on how fires influence multiple carnivore species simultaneously. Using South African...

Photoionization and electron impact ionization frequencies in the dayside ionosphere of Mars, calculated from MAVEN in situ data

Robert Lillis
The following data set contains valid photoionization frequencies and electron impact ionization frequencies for the primary neutral species CO2, O, CO, N2, and Ar in the dayside ionosphere of Mars, calculated from MAVEN in situ data from November 1, 2014 until December 12, 2019. It also contains necessary ancillary data, including Time UTC, Mars season, solar zenith angle, spacecraft altitude, atmospheric pressure, normalized on attenuated CO2 photoionization frequency (as a proxy for solar activity), the...

Data for: Carnivore niche partitioning in a human landscape

Mauriel Rodriguez Curras, Emiliano Donadío, Arthur Middleton & Jonathan Pauli
To minimize competitive overlap, carnivores modify one of their critical niche axes: space, time, or resources. However, we currently lack rules for how carnivore communities operate in human-dominated landscapes. We simultaneously quantified overlap in the critical niche axes of a simple carnivore community – an apex carnivore (Puma concolor), a dominant meso-carnivore (Lycalopex culpaeus), and a subordinate meso-carnivore (L. griseus) – in a human-landscape featuring pastoralists and semi-domestic carnivores (i.e., dogs Canis familiaris). We found...

Supplementary information for aquatic and blood-feeding Diptera

Nina Pak, Allan Cabrero, Keith Bayless & Michelle Trautwein
Aquatic Diptera are some of the most diverse and notable flies, impacting human health and providing ecosystem services. Despite the importance of aquatic Diptera, the evolution of aquatic life history and blood-feeding, are not sufficiently understood. Here, we examine the evolution of aquatic life histories and their associations with blood-feeding across Diptera. Aquatic and blood-feeding Diptera are phylogenetically conserved across the fly tree of life. We found evidence that the most recent common ancestor of...

Registration Year

  • 2021

Resource Types

  • Dataset


  • University of California, Berkeley
  • Laboratory for Atmospheric and Space Physics
  • University of Orléans
  • Goddard Space Flight Center
  • University of Washington
  • Stanford University
  • Utah State University
  • University of California, Davis
  • National Research Institute for Agriculture, Food and Environment
  • University of Pretoria