50 Works

Emergent properties as by-products of prebiotic evolution of aminoacylation ribozymes

Evan Janzen, Yuning Shen, Alberto Vazquez-Salazar, Ziwei Liu, Celia Blanco, Josh Kenchel & Irene Chen
The emergence of the genetic code was a major transition in the evolution from a prebiotic RNA world to the earliest modern cells. A prominent feature of the standard genetic code is error minimization, or the tendency of mutations to be unusually conservative in preserving biophysical features of the amino acid. While error minimization is often assumed to result from natural selection, it has also been speculated that error minimization may be a by-product of...

Play Sustainaball: An environmental footprint for an MLB team season

Hannah Brady, Gabrielle Barsotti, Jordan Davis, Carly Norris & Eric Shaphran
In recent years, there has been increased attention and focus from the public on the environmental impact of professional sports organizations. Significant opportunities exist for Major League Baseball (MLB) teams to both reduce their own environmental footprint, and that of their fans, through sustainability initiatives. Despite stadiums using upwards of ten million gallons of water per year and having the same energy needs as a small city, no MLB team has completed a public-facing quantification...

Urbanization drives geographically heterogeneous freshwater salinization in the northeastern United States

Ryan Utz, Samantha Bidlack, Burch Fisher & Sujay Kaushal
Rising trends in freshwater salinity, collectively termed the Freshwater Salinization Syndrome (FSS), constitute a global environmental concern. Given that the FSS has been observed in diverse settings, key questions regarding the causes, trend magnitudes, and consequences remain. Prior work hypothesized that FSS is driven by state factors, such as human-centered land use change, geology, and climate. Here, we identify the fundamental overriding factors driving FSS within the northeastern United States and quantify the diversity of...

Forest Folks Data

Hanna Weyland
Data in this dataset was utilized as a part of the Bren School for Environmental Science & Management master's group project analyzing ecosystem services in the Tahoe Central Sierra Initiative.

Habitat Suitability Analysis of Larval Pacific Lamprey Habitat in the Columbia River Estuary

Ethan Hoffman, Craig Stuart, Lory Salazar-Velasquez & Krista Finlay
Pacific lamprey (Entosphenus tridentata) are native fish to the Columbia River Basin. Over the past 60 years, anthropogenic disturbances have contributed to a 95% decline of historical population numbers. Member-tribes of the Columbia River Inter-Tribal Fish Commission have acknowledged the importance of Pacific lamprey to the Columbia River ecosystem and expressed concern about the loss of an essential tribal cultural resource. As a result, the Columbia River Inter-Tribal Fish Commission created the Tribal Pacific Lamprey...

Large Herbivore Nemabiomes: Patterns of Diversity and Sharing

Georgia Titcomb, Johan Pansu, Matthew Hutchinson, Kaia Tombak, Christina Hansen, Chris Baker, Tyler Kartzinel, Hillary Young & Robert Pringle
Amidst global shifts in the distribution and abundance of wildlife and livestock, we have only a rudimentary understanding of ungulate parasite communities and parasite-sharing patterns. We used qPCR and DNA metabarcoding of fecal samples to characterize gastrointestinal nematode (Strongylida) community composition and sharing among 17 sympatric species of wild and domestic large mammalian herbivore in central Kenya. We tested a suite of hypothesis-driven predictions about the role of host traits and phylogenetic relatedness in describing...

Silicate Compositions Database

Andrew Ericks, Frank Zok, David Poerschke & Carlos Levi
Degradation of thermal and environmental barrier coatings (T/EBC) by interactions with molten silicate deposits (ash, sand, dust) poses a fundamental threat to progress in gas turbine technology. This file is the first publicly available, comprehensive database of its kind on potential silicate deposits. It features in an accompanying article addressing an original ICME-inspired approach (Integrated Computational Materials Engineering) to analyzing the high dimensional data. The article responds to a longstanding need for identifying a reasonable...

Eocene Terrane Accretion in Northern Cascadia Recorded by Brittle Left-lateral Slip on the San Juan Fault

Nicolas Harrichhausen, Kristin Morell, Christine Regalla, Emerson Lynch & Lucinda Leonard
The San Juan fault, on southern Vancouver Island, Canada, juxtaposes the oceanic Wrangellia and Pacific Rim terranes in the northern Cascadia forearc, and has been suggested to play a role in multiple Mesozoic--Cenozoic terrane accretion events. However, direct observations of the San Juan fault's kinematics have not been documented and its exact role in accommodating strain arising from terrane accretion is unknown. To test if, how, and when the San Juan fault accommodated accretion-related strain,...

Icelandic Volcanic Rocks Isotopic Database (IVID)

Sunna Harðardóttir, Simon Matthews, Sæmundur Ari Halldórsson & Matthew Jackson
We compile a new geochemical database (Icelandic Volcanic rocks Isotopic Database, IVID) which includes previously reported 87Sr/86Sr, 143Nd/144Nd, 176Hf/177Hf, 206Pb/204Pb, 207Pb/204Pb, 208Pb/204Pb, 187Os/188Os and 3He/4He data and major and trace element concentrations measured in Icelandic volcanic rocks. Isotopic compositions were evaluated, and filtered to identify the highest quality data and data most likely to represent mantle-derived compositions. The carefully filtered, comprehensive geochemical database is an important contribution to the geochemical community and can be used...

Global analysis of environmental and socioeconomic factors associated with human burden of environmentally mediated pathogens

Susanne Sokolow, Isabel Jones, Chelsea Wood, Kevin Lafferty, Andres Garchitorena, Skylar Hopkins, Andrea Lund, Andrew MacDonald, Nicole Nova, Chris LeBoa, Alison Peel, Erin Mordecai, Meghan Howard, Julia Buck, David Lopez-Carr, Michele Barry, Matthew Bonds & Giulio De Leo
This repository contains four datasets that support repeatability of the analyses in the Sokolow et al. paper published in Lancet Planetary Health. Descriptions of the four datasets are included in the metadata document. This study found that 80% of pathogen species known to infect humans are environmentally mediated, causing about 40% of contemporary infectious-disease burden (global loss of 130 million years of healthy life annually). More than 91% of this environmentally-mediated disease burden occurs in...

Sub-Lithospheric Small-Scale Convection Tomographically Imaged Beneath the Pacific Plate

Zachary Eilon
Small-scale convection beneath the oceanic plates has been invoked to explain off-axis non-plume volcanism, departure from simple seafloor depth-age relationships, and intraplate gravity lineations. We deployed thirty broadband OBS stations on ~40 Ma Pacific seafloor in a region notable for gravity anomalies, measured by satellite altimetry, elongated parallel to plate motion. P-wave teleseismic tomography reveals alternating upper mantle velocity anomalies on the order of ±2%, aligned with the gravity lineations. These features, which correspond to...

Data for: Evaluating conditions for MFAD fisheries development in the Caribbean and Bermuda

Margaret Wilson, Julia Lawson, Maria Ignacia Rivera-Hechem, Juan Carlos Villaseñor-Derbez & Steve Gaines
Moored fish aggregating devices (MFADs) are promoted in small-scale fisheries around the world as tools to increase fisher incomes, enhance food security, and ease pressure on degraded inshore fisheries. Despite their growing popularity, the biophysical and socioeconomic contexts in which MFAD fisheries are implemented - and the implications of these contexts for MFAD fishery success - remain poorly understood. Here we develop a framework identifying and evaluating factors likely to influence MFAD fishery outcomes and...

Does scent attractiveness reveal women’s ovulatory timing? Evidence from signal detection analyses and endocrine predictors of odor attractiveness

James Roney, Mei Mei, Rachel Grillot, Craig Abbey, Melissa Emery Thompson & James Roney
Odor cues associated with shifts in ovarian hormones indicate ovulatory timing in females of many nonhuman species. Although prior evidence supports women’s body odors smelling more attractive on days when conception is possible, that research has left ambiguous how diagnostic of ovulatory timing odor cues are, as well as whether shifts in odor attractiveness are correlated with shifts in ovarian hormones. Here, 46 women each provided 6 overnight scent and corresponding day saliva samples spaced...

The Household Context of In Situ Conservation in a Center of Crop Diversity in Oaxaca, Mexico

Daniela Soleri, Flavio Aragón Cuevas, Humberto Castro García, David Cleveland & Steven Smith
Crop diversity conservation in situ is an ecosystem service with benefits at household, community, and global scales. These include risk reduction and adaptation to changing physical and sociocultural environments—both important given the accelerating changes in climate, human migration, and the industrialization of agriculture. In situ conservation typically occurs as part of small-scale, traditionally based agriculture and can support cultural identity and values. Although decisions regarding crop diversity occur at the household level, few data detail...

16S rRNA data for an in vitro model of the human dental plaque bacterial community (3 hosts)

Baoqing Zhou, Jennifer Mobberley, Kelly Shi & Irene Chen
The creation of oral microcosms with reproducible composition is important for developing model systems of the oral microbiome. Here, we report on the outcome of a methodologically simple but scientifically informative approach, in which we sample the dental plaque microbiome from 3 individuals and characterize the variability among the microbiomes after storage and subsequent propagation. We use 24-well culture plates with artificially generated pellicle under a defined anaerobic atmosphere and an undefined medium supplemented by...

Healthy beverage initiatives: A case study of scenarios for optimizing their environmental benefits on a university campus

David Arthur Cleveland, Kyle Meisterling, Jacklyn Vo, Kelly Ann Garvey, Hallie E. Brown & Marie T. Tumbleson
The association between consumption of sugar sweetened beverages (SSBs) and diseases including diabetes, liver disease and dental disease is well known, yet SSBs continue to be aggressively promoted, including on university campuses. Healthy beverage initiatives (HBIs) are focused on improving health by decreasing consumption of SSBs. Some HBIs also aim to improve environmental sustainability, e.g. by substituting tap water for SSBs, including the HBI on the 10 campuses of the University of California. However, there...

Data from: Genotype x environment interaction obscures genetic sources of variation in seed size in Dithyrea californica but provides the opportunity for selection on phenotypic plasticity

Eugenio Larios & Susan Mazer
Premise: Seed size is a functional trait that influences individual fitness but the genetic basis of variation in individual seed size in wild species remains still largely unknown. The evolutionary trajectory of seed size depends, in part, on whether seed size variation is determined by additive, maternal, or non-additive genetic variance. The expression of these sources of variance in seed size may be environment-dependent, reflecting genetic variation in phenotypic plasticity. In this study, we used...

Multi-modal dataset of a polycrystalline metallic material: 3D microstructure and deformation fields

J.C. Stinville, J.M. Hestroffer, M.A. Charpagne, A.T. Polonsky, M.P. Echlin, C.J. Torbet, V. Valle, A. Loghin, O. Klaas, M.P. Miller, K.E. Nygren, I.J Beyerlein & T.M. Pollock
The development of high-fidelity mechanical property prediction models for the design of polycrystalline materials relies on large volumes of microstructural feature data. Concurrently, at these same scales, the deformation fields that develop during mechanical loading can be highly heterogeneous. Spatially correlated measurements of 3D microstructure and the ensuing deformation fields at the micro-scale would provide highly valuable insight into the relationship between microstructure and macroscopic mechanical response. They would also provide direct validation for numerical...

The relative strength of selection on modifiers of genetic architecture under migration load

Stephen Proulx & Henrique Teotonio
Gene flow between populations adapting to differing local environmental conditions creates a "migration load" because individuals might disperse to habitats where their survival is low or because they might reproduce with locally maladapted individuals. The amount by which the mean relative population fitness is kept below one creates an opportunity for modifiers of the genetic architecture to spread due to selection. Prior work that separately considered modifiers changing dispersal or recombination rates, or altering dominance...

Sexual signals persist over deep time: ancient co-option of bioluminescence for courtship displays in cypridinid ostracods

Emily Ellis, Jessica Goodheart, Nicholai Hensley, Vanessa González, Nicholas Reda, Trevor Rivers, James Morin, Elizabeth Torres, Gretchen Gerrish & Todd Oakley
Although the diversity, beauty, and intricacy of sexually selected courtship displays command the attention of evolutionists, the longevity of these traits in deep time is poorly understood. Population-based theory suggests sexual selection could either lower or raise extinction risk, resulting in high or low persistence of lineages with sexually selected traits. Furthermore, empirical studies that directly estimate longevity of sexually selected traits are uncommon. Sexually selected signals - including bioluminescent courtship - originated multiple times...

Plant-based food choice selection when presented as a default

David Cleveland & Varun Iyer
The main objective of this study is to understand the effect of a default nudge on peoples’ meal choices. To decrease the climate and environmental impact of the food system, there needs to be a shift away from animal source food to plant foods. Our main hypothesis is that when the default meal choice is plant based a larger proportion of participants will accept this default compared with the proportion opting out of the default...

Wins and Losses in Intergroup Conflicts Reflect Energy Balance in Red-Tailed Monkeys

Michelle Brown, Ronnie Steinitz & Melissa Emery Thompson
The energetic costs and benefits of intergroup conflicts over feeding sites are widely hypothesized to be significant, but rarely quantified. In this study, we use short-term measures of energy gain and expenditure to test whether winning an intergroup encounter is associated with greater benefits, and losing with greater costs. We also test an alternative perspective, where groups fight for access to large food sources that are neither depletable nor consistently monopolizable: in this case, a...

An Infrasound Array Study of Mount St. Helens

Robin S. Matoza & Alexandra Iezzi
The ongoing activity of Mount St. Helens provides an opportunity to study the infrasonic wavefield produced by an active, silica-rich volcano. In late October 2004, as a pilot experiment for the Acoustic Surveillance for Hazardous Eruptions (ASHE) project, we deployed two infrasound arrays, each co-located with a broadband seismometer and weather station, to continuously record seismo-acoustic signals from Mount St. Helens. The nearest array, Coldwater, was deployed on the northern flank of the volcano, ∼13...

Global reference histograms of the IMS infrasound broadband detection lists

Samuel Kristoffersen, Alexis Le Pichon, Patrick Hupe & Robin Matoza
This data set builds upon the broadband detection lists of the International Monitoring System (IMS)’s infrasound stations. The infrasound data of these stations are regularly (re-)processed at the German National Data Centre at BGR (e.g., Ceranna et al., 2019; https://doi.org/10.1007/978-3-319-75140-5_13) using the Progressive Multi-Channel Correlation (PMCC) array processing method (Cansi, 1995; https://doi.org/10.1029/95GL00468). The latest reprocessing with 26 one-third octave spaced frequency bands in the IMS band of interest (0.01 to 4 Hz) included all 53...

Data from: Context-dependent effects of shifting large herbivore assemblages on plant structure and diversity

Devyn Orr, An Bui, Maggie Klope, Michelle Lee, Ian McCullough, Carina Motta, Isabella Mayorga, Kelli Konicek & Hillary Young
Despite wide recognition of the importance of anthropogenically driven changes in large herbivore communities – including both declines in wildlife and increases in livestock – there remain large gaps in our knowledge about the impacts of these changes on plant communities, particularly when combined with concurrent changes in climate. Considering these prominent forms of global change in tandem enables us to better understand controls on savanna vegetation structure and diversity under real-world conditions.We conducted a...

Registration Year

  • 2022

Resource Types

  • Dataset


  • University of California, Santa Barbara
  • University of Washington
  • Northern Arizona University
  • University of California Los Angeles
  • Cornell University
  • Brown University
  • University of Kansas
  • Stanford University
  • Hunter College
  • Columbia University