280 Works

Understanding Behavioral Responses of Wildlife to Traffic to Improve Mitigation Planning

Fraser Shilling
Creating and maintaining sustainable transportation systems depends in part on understanding and mitigating ecological impacts. Wildlife crossing structures (WCS) are often used to mitigate impacts on wildlife populations. WCS and existing structures may provide passage for multiple species, depending on their sensitivity to traffic disturbance and perception of the roadway. In a previous project, we found that traffic conditions and traffic noise could reduce WCS effectiveness in facilitating passage of diverse and sensitive species. In...

Integrated Crop-Livestock Systems achieve comparable crop yields to specialized systems: a meta-analysis

Caitlin Peterson, Leonardo Deiss & Amelie Gaudin
Production systems that feature temporal and spatial integration of crop and livestock enterprises, also known as integrated crop-livestock systems (ICLS), have the potential to intensify production on cultivated lands and foster resilience to the effects of climate change without proportional increases in environmental impacts. Yet, crop production outcomes following livestock grazing across environments and management scenarios remain uncertain and a potential barrier to adoption, as producers worry about the effects of livestock activity on the...

Data from: Feeding and damage-induced volatile cues make beetles disperse and produce a more even distribution of damage for sagebrush

Richard Karban & Louie Yang
1. Induced plant responses to herbivory are common and we have learned a lot about the mechanisms of induced resistance and their effects on herbivore performance. We know less about their effects on herbivore behavior and especially on spatial patterns of damage. 2. Theoretical models predict that induced responses can cause patterns of damage to become aggregated, random, or even. A recent model predicted that informed herbivore movement coupled with communication between plants would make...

Data from: Evolved phenological cueing strategies show variable responses to climate change

Collin B. Edwards & Louie H. Yang
Several studies have documented a global pattern of phenological advancement that is consistent with ongoing climate change. However, the magnitude of these phenological shifts is highly variable across taxa and locations. This variability of phenological responses has been difficult to explain mechanistically. To examine how the evolution of multi-trait cueing strategies could produce variable responses to climate change, we constructed a model in which organisms evolve strategies that integrate multiple environmental cues to inform anticipatory...

Data from: Efficacy of masks and face coverings in controlling aerosol particle emission from expiratory activities

Sima Asadi, William Ristenpart, Santiago Barreda, Anthony Wexler, Nicole Bouvier & Christopher Cappa
The dataset provided here is associated with the work "Efficacy of masks and face coverings in controlling aerosol particle emission from expiratory activities," by Asadi et al. This includes measurements made of the influence of different types of face coverings (surgical masks, both vented and unvented N95 respirators, and homemade fabric and paper towel masks) on the emission of micron-scale aerosols from various expiratory activities (coughing, breathing, speaking).

Morphology and herbivory of Egregia menziesii at sites from California to Washington

Nicholas Burnett, Eric Armstrong, Rosemary Romero, Charlotte Runzel & Richelle Tanner
Herbivores can drastically alter the morphology of macroalgae by directly consuming tissue and by inflicting structural wounds. Wounds, in particular, can result in large amounts of tissue breaking away from macroalgae, amplifying the damage initially caused by herbivores. Herbivores that commonly wound macroalgae often only occur over a portion of a macroalga’s lifespan or geographic range. However, we know little about the influence of these periodic or regional occurrences of herbivores on the large-scale seasonal...

Supporting data for: The setup and relaxation of spring upwelling in a deep, rotationally influenced lake

Derek Roberts & S. Geoffrey Schlaodow
Supporting data for the manuscript "The setup and relaxation of spring upwelling in a deep, rotationally influenced lake" accepted for publication in Limnology and Oceanography in November 2020. The data herein were collected at Lake Tahoe, CA/NV, USA in May-June, 2018 as part of a collaboration between the UC Davis Tahoe Environmental Research Center, the UC Davis Bodega Marine Lab, and the Stanford Environmental Fluid Mechanics Laboratory. The goal of this data collection effort was...

Data from: Local government contribution to recovery of the giant gartersnake (Thamnophis gigas)

Steven Greco
Recovery of a threatened or endangered species usually requires conservation and mitigation actions at the local level across the species' entire range (i.e., geographic limits of a species' spatial distribution). Depending on the size of the range it could involve numerous or few jurisdictions. Under the federal Endangered Species Act an optional off-set program allows local governments to create a Habitat Conservation Plan (HCP) to guide mitigative actions (streamlining permitting) and in the state of...

A preliminary framework for magmatism in modern continental back-arc basins and its application to the Triassic-Jurassic tectonic evolution of the Caucasus

Dylan Vasey, Eric Cowgill & Kari Cooper
In contrast to intraoceanic back-arc basins, extension within a continental back-arc basin initiates within continental rather than oceanic lithosphere. The geochemical characteristics of magmatic rocks within continental back-arc basins are poorly understood relative to their intraoceanic counterparts. Here, we compile published geochemical data from five modern continental back-arc basins – the Okinawa Trough, Bransfield Strait, Tyrrhenian Sea, Patagonia plateau, and Aegean Sea/Western Anatolia – to establish a geochemical framework for continental back-arc magmatism. This analysis...

Map script with examples from: Taxonomic revision of the Temnothorax salvini clade (Hymenoptera: Formicidae), with a key to the clades of New World Temnothorax

Matthew Prebus
Temnothorax is a large myrmicine ant genus with a range spanning the northern hemisphere, including the northern half of the Neotropics. Many of the Neotropical species were originally placed in the now defunct genus Macromischa. Recent molecular work has revealed that distinct lineages of Neotropical Temnothorax have arrived by evolutionary convergence at a morphological syndrome with characteristics that were used to diagnose the former genus Macromischa. One such lineage is the salvini clade, which in...

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...

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 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
This repository contains the data and code supporting the analyses in the corresponding paper in Global Ecology and Biogeography (GEB). The abstract of the paper is as follows: 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...

Project factors and conservation outcome data for SeaDoc Society-funded research projects

Monica LeFlore, Peter Sebastian, Joseph K. Gaydos & David Bunn
This dataset reflects project factors and conservation success of 20 years of research funded by the academically-based marine conservation group the Sea Doc Society (UC Davis School of Veterinary Medicine). These data were compiled through interviews with Principal investigators and co-investigators, and SeaDoc Society's records.

California Drinking Water Source Assessment Program – UC Davis Information Center for the Environment

Leah Walker & Paul Collins
The California Drinking Water Source Assessment Program (DWSAP) was developed by the California Department of Public Health (CDPH) to provide information to communities that wish to develop local programs to protect their sources of drinking water. ICE was contracted with CDPH in 1999 to provide a wide range of technical services in support of this program, including the development of a statewide, standardized protocol to GPS all drinking water sources and treatment facilities in the...

Rice-recombinant butyrylcholinesterase (rrBChE) production dataset

Shuting Liao, Kantharakorn Macharoen, Karen McDonald, Somen Nandi & Debashis Paul
We propose a method for analyzing the variability in smooth, possibly nonlinear, functionals associated with a set of product production trajectories measured under different experimental conditions. The key challenge is to make meaningful inference on these parameters across different experimental conditions when only a limited number of measurements in time are collected for each treatment, and when there are only a few, or no, replicates available. For this purpose we adopt a modeling approach by...

Population structure of Drosophila suzukii and signals of multiple invasions in the continental United States

Joanna Chiu
Drosophila suzukii, or spotted-wing drosophila, is now an established pest in many parts of the world, causing significant damage to numerous fruit crop industries. Native to East Asia, D. suzukii infestations started in the United States a decade ago, occupying a wide range of climates. To better understand invasion ecology of this pest, knowledge of past migration events, population structure, and genetic diversity is needed. In this study, we sequenced whole genomes of 237 individual...

Perspective piece: Comparison of eastern and western North American monarch butterflies

Micah Freedman
Monarch butterflies are a species of conservation priority due to declining overwintering populations in both eastern and western North America. Declines in western overwintering monarchs—more than 99.9% since monitoring began—are especially acute. However, the degree to which western monarchs are a distinct biological entity is uncertain. In this review, we focus on phenotypic and genetic differentiation between eastern and western monarchs, with the goal of informing researchers and policy-makers who are interested in monarch conservation....

The deep sea is a hot spot of fish body shape evolution

Christopher Martinez
Deep sea fishes have long captured our imagination with striking adaptations to life in the mysterious abyss, raising the possibility that this cold, dark ocean region may be a key hub for physiological and functional diversification. We explore this idea through an analysis of body shape evolution across ocean depth zones in over 3,000 species of marine teleost fishes. We find that the deep ocean contains twice the body shape disparity of shallow waters, driven...

Organizational structure and institutional types of community water systems in California

Kristin Dobbin & Amanda Fencl
Dataset accompanying Dobbin & Fencl (2021) publication entitled "Institutional diversity and safe drinking water provision in the United States" including secondary data from the U.S. EPA and California State Water Resources Control Board as well as the author-produced 26-type organizational structural and institutional coding of Community Water Systems in California.

Pictures of unmanned aerial vehicle (UAV) experiments on testing paper

Shuting Liao, Li-Yu Liu, Ting-An Chen, Kuang-Yu Chen & Fushing Hsieh
Our computational developments and analyses on experimental images are designed to evaluate the effectiveness of chemical spraying via unmanned aerial vehicle (UAV). Our evaluations are in accord with the two perspectives of color-complexity: color variety within a color system and color distributional geometry on an image. First, by working within RGB and HSV color systems, we develop a new color-identification algorithm relying on highly associative relations among three color-coordinates to lead us to exhaustively identify...

Quantitative interactions: the disease outcome of Botrytis cinerea across the plant kingdom

Celine Caseys, Gongjun Shi, Nicole Soltis, Raoni Gwinner, Jason Corwin, Susanna Atwell & Daniel Kliebenstein
Botrytis cinerea is a fungal pathogen that causes necrotic disease on more than a thousand known hosts widely spread across the plant kingdom. How B. cinerea interacts with such extensive host diversity remains largely unknown. To address this question, we generated an infectivity matrix of 98 strains of B. cinerea on 90 genotypes representing eight host plants. This experimental infectivity matrix revealed that the disease outcome is largely explained by variations in either the host...

California subalpine forest post-fire diversity and productivity

Emily Brodie
High severity fire may promote or reduce plant understory diversity in forests. However, few empirical studies test long-standing theoretical predictions that productivity may help to explain observed variation in post-fire plant diversity. Support for the influence of productivity on disturbance-diversity relationships is found predominantly in experimental grasslands, while tests over large areas with natural disturbance and productivity gradients are few and have yielded inconsistent results. Here, we measured the response of post-fire understory plant diversity...

Snail mucus increases the CO2 efflux of biological soil crusts

Shelby Rinehart, Netta Shamir Weller & Dror Hawlena
Biological soil crusts (hereafter, biocrusts) are communities of microorganisms that regulate key ecosystem processes such as water distribution, soil erosion, and nutrient cycling in drylands worldwide. The nature of biocrust function can be influenced by multiple environmental factors, including climatic conditions (e.g., precipitation), interactions with plants, and anthropogenic disturbances. Animal regulation of biocrust function has received less research attention, focusing primarily on livestock trampling and to a much lesser extent on biocrust consumption by mesofauna....

Wheat grain yield decreased over the past 35 years, but protein content did not change

Arnold Bloom & Richard Plant
The extent to which rising atmospheric CO2 concentration has already influenced food production and quality is uncertain. Here, we analyzed annual field trials of fall-planted common wheat in California from 1985 to 2019, a period during which global atmospheric CO2 concentration increased 19%. Even after accounting for other major factors (cultivar, location, degree-days, soil temperature, total water applied, nitrogen fertilization, and pathogen infestation), wheat grain yield and protein yield declined 13% over this period, but...

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Resource Types

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  • University of California, Davis
  • University of California, Berkeley
  • Oklahoma State University
  • United States Department of Agriculture
  • San Diego State University
  • Oregon State University
  • George Mason University
  • University of Florida
  • University of Montana
  • University of Washington