56 Works

An ancient and eroded social supergene is widespread across Formica ants

Alan Brelsford, Jessica Purcell, Amaury Avril, Patrick Tran Van, Junxia Zhang, Timothée Brütsch, Liselotte Sundström, Heikki Helanterä & Michel Chapuisat
Supergenes, clusters of tightly linked genes, play a key role in the evolution of complex adaptive variation. While supergenes have been identified in many species, we lack an understanding of their origin, evolution and persistence. Here, we uncover 20-40 MY of evolutionary history of a supergene associated with polymorphic social organization in Formica ants. We show that five Formica species exhibit homologous divergent haplotypes spanning 11 Mbp on chromosome 3. Despite the size of the...

Data for differential feeding responses of several bee species to sugar sources containing Iridomyrmecin, an Argentine ant trail pheromone component

Erin Wilson Rankin, Jacob Cecala, Dong-Hwan Choe & Nohely Hernandez Pineda
These data describe the bioassays associated with published article, doi: 10.1007/s10905-020-09748-8 (Differential Feeding Responses of Several Bee Species to Sugar Sources Containing Iridomyrmecin, an Argentine Ant Trail Pheromone Component). We investigated the response of three commercially important pollinator species to a pheromone deposited by Argentine ants at a food source. The Argentine ant Linepithema humile is one of the most invasive and problematic ant species; it has been introduced to Mediterranean-type habitats around the globe....

Development of the early Cambrian oryctocephalid trilobite Oryctocarella duyunensis from western Hunan, China

Tao Dai, Nigel Hughes, Xingliang Zhang & Shanchi Peng
Abundant articulated specimens of the oryctocarine trilobite Oryctocarella duyunensis from the lower Cambrian (Stage 4, Series 2) Balang Formation at the Bulin section in western Hunan Province, South China, permit the description of all meraspid degrees. The maximum number of thoracic segments observed in this collection is 11. Meraspid growth was accompanied by progressive and gradual change in overall form, and this animal showed an homonomously segmented trunk with variation in the number of pygidial...

Data from: Rapid evolution and plasticity of genitalia

E. Dale Broder, Cameron K. Ghalambor, Corey A. Handelsman, Emily W. Ruell, David N. Reznick & Lisa M. Angeloni
Genital morphology exhibits tremendous variation and is intimately linked with fitness. Sexual selection, nonmating natural selection, and neutral forces have been explored as potential drivers of genital divergence. Though less explored, genitalia may also be plastic in response to the developmental environment. In poeciliid fishes, the length of the male intromittent organ, the gonopodium, may be driven by sexual selection if longer gonopodia attract females or aid in forced copulation attempts, or by nonmating natural...

California grid electrical energy storage requirements for select renewables integration and fleet electrification scenarios

Arun S.K. Raju & Alexander Vu
Significant electrification of the transportation sector is necessary for the State to achieve several important greenhouse gas (GHG) reduction and renewable energy targets. The State’s electricity generation and transmission capabilities must increase in order to meet the demand generated by increasing levels of fleet electrification. The increased demand, combined with the Renewables Portfolio Standard (RPS) targets will require significantly increased energy storage capabilities that can accommodate demand while integrating renewable power sources into the grid....

Gardener demographics, experience, and motivations drive differences in plant species richness and composition in urban gardens

Stacy Philpott, Monika Egerer, Peter Bichier, Hamutahl Cohen, Roseann Cohen, Heidi Liere, Shalene Jha & Brenda Lin
Urban agriculture has received considerable attention for its role in supporting biodiversity and ecosystem services, and health and well-being for growing urban populations. Urban gardens managed with agroecological practices and higher plant diversity support more biodiversity and may support higher crop production. Plant selection in gardens is a function of temperature and environmental conditions and also depends on gardener socio-demographic characteristics, motivations for gardening, and gardening experience. In this study, we examined how plant richness...

No state change in pelagic fish production and biodiversity during the Eocene-Oligocene Transition

Elizabeth Sibert, Michelle Zill, Ella Frigyik & Richard Norris
The Eocene-Oligocene (E/O) boundary ~33.9 million years ago, has been described as a state change in the Earth system marked by the permanent glaciation of Antarctica and a proposed increase in oceanic productivity. Here we quantified the response of fish production and biodiversity to this event using microfossil fish teeth (ichthyoliths) in seven deep-sea sediment cores from around the world. Ichthyolith accumulation rate (a proxy for fish biomass production) shows no synchronous trends across the...

Environment shapes the microbiome of the Blue Orchard Bee, Osmia lignaria

Hamutahl Cohen
Wild bees encounter and collect environmental microbes whilst foraging. While environmental context affects bee diversity, little is known about it how affects the wild bee microbiome. We used field surveys in 17 urban gardens to examine whether and how variation in local and landscape habitat features shapes the microbiome of the solitary Blue Orchard Bee, Osmia lignaria. We installed O. lignaria cocoons at each site, allowed bees to emerge and forage, then collected them. We...

Holy Fire Headwater Sediment Dynamics, Santa Ana Mts, CA - Leach Canyon TLS U-075 PS01 SV01

Andrew Gray, Nicolas Barth & James Guilinger

Holy Fire Headwater Sediment Dynamics, Santa Ana Mts, CA - Leach Canyon SfM U-075 PS01 SV06

Andrew Gray, Nicolas Barth & James James Guilinger

Holy Fire Headwater Sediment Dynamics, Santa Ana Mts, CA - Leach Canyon SfM U-075 PS01 SV04

Andrew Gray, Nicolas Barth & James Guilinger

Holy Fire Headwater Sediment Dynamics, Santa Ana Mts, CA - Leach Canyon TLS U-075 PS01 SV03

Andrew Andrew Gray, Nicolas Barth & James Guilinger

Data from: Recurrent mutualism breakdown events in a legume rhizobia metapopulation

Joel Sachs, Kelsey Gano-Cohen, Camille Wendlandt, Khadija Al Moussawi, Peter Stokes, Kenjiro Quides, Alexandra Weisberg & Jeff Chang
Bacterial mutualists generate major fitness benefits for eukaryotes, reshaping the host phenotype and its interactions with the environment. Yet microbial mutualist populations are predicted to generate mutants that defect from providing costly services to hosts while maintaining the capacity to exploit host resources. Here, we examined the mutualist service of symbiotic nitrogen fixation in a metapopulation of root-nodulating Bradyrhizobium spp. that associate with the native legume Acmispon strigosus. We quantified mutualism traits of 85 Bradyrhizobium...

Data from: Experimental study of species invasion – early population dynamics and role of disturbance in invasion success

David Reznick, Sebastiano De Bona, Andres Lopez-Sepulcre, Mauricio Torres, Ronald Bassar, Paul Bentzen & Joseph Travis
Much of our understanding of natural invasions is retrospective, based on data acquired after invaders become established. As a consequence, we know little about the characteristics of the early population growth and habitat use of the invaders during establishment. Here we report on experimental introductions of guppies into natural streams in which we conducted monthly censuses of each population. Two of the four introductions were in streams with thinned canopies, which mimics a common form...

Data from: Landscape simplification shapes pathogen prevalence in plant-pollinator networks

Laura Figueroa, Heather Grab, Wee Hao Ng, Christopher Myers, Peter Graystock, Quinn McFrederick & Scott McArt
Species interaction networks, which play an important role in determining pathogen transmission and spread in ecological communities, can shift in response to agricultural landscape simplification. However, we know surprisingly little about how landscape simplification-driven changes in network structure impact epidemiological patterns. Here, we combine mathematical modeling and data from eleven bipartite plant-pollinator networks observed along a landscape simplification gradient to elucidate how changes in network structure shape disease dynamics. Our empirical data show that landscape...

Connecting species’ geographical distributions to environmental variables: range maps versus observed points of occurrence

John T Rotenberry & Priya Balasubramaniam
Connecting the geographical occurrence of a species with underlying environmental variables is fundamental for many analyses of life history evolution and for modeling species distributions for both basic and practical ends. However, raw distributional information comes principally in two forms: points of occurrence (specific geographical coordinates where a species has been observed), and expert-prepared range maps. Each form has potential short-comings: range maps tend to overestimate the true occurrence of a species, whereas occurrence points...

Connected Emission Control Technologies for Freight Vehicles

Ji Luo, Kanok Boriboonsomsin & Matthew Barth
This project explores how connected vehicle technology can be used to reduce the impacts of air pollutant emissions from freight vehicles. Specifically, the objective of this project is to develop new vehicle routing algorithms for determining travel routes for heavy-duty diesel trucks that would reduce the exposure of local residents to air pollutant emissions from these trucks. The core of the methodology is to first estimate the total amount of human exposure to pollutant emissions...

Data from: Task partitioning in ants lacking discrete morphological worker subcastes

Mari West & Jessica Purcell
Task partitioning allows for efficient coordination of behavior in social insect colonies. Many task allocation studies focus on social insect species with discrete morphological worker subcastes, such as those possessing major and minor workers with strongly differentiated body plans. Much less is known about task partitioning among size-variable workers lacking discrete morphological subcastes. We investigated task fidelity and its correlation with worker size in Formica species with differing degrees of body size variation. During a...

Data from: The effects of temperature on the defensive strikes of rattlesnakes

Malachi D. Whitford, Grace A. Freymiller, Timothy E. Higham & Rulon W. Clark
Movements of ectotherms are constrained by their body temperature owing to the effects of temperature on muscle physiology. As physical performance often affects the outcome of predator–prey interactions, environmental temperature can influence the ability of ectotherms to capture prey and/or defend themselves against predators. However, previous research on the kinematics of ectotherms suggests that some species may use elastic storage mechanisms when attacking or defending, thereby mitigating the effects of sub-optimal temperature. Rattlesnakes (Crotalus spp.)...

Voles mediate functional trait diversity along a resource gradient

Loralee Larios, Loralee Larios & John Maron
Disentangling the effect of multiple ecological processes on plant trait composition is complicated by the fact that both top-down and bottom-up processes may affect similar traits. We examined the interacting role of resource variation and vole herbivory on functional trait patterns in an annual California grassland. We manipulated vole herbivory via exclosures at eight grassland sites along a steep resource gradient and measured plant composition and functional traits over three years. Plants with resource acquisitive...

Individual differences determine the strength of ecological interactions

Jason I. Griffiths, Dylan Z. Childs, Ronald D. Bassar, Tim Coulson, David N Reznick & Mark Rees
Biotic interactions are central to both ecological and evolutionary dynamics. In the vast majority of empirical studies, the strength of intraspecific interactions is estimated by using simple mea- sures of population size. Biologists have long known that these are crude metrics, with experiments and theory suggesting that interactions between individuals should depend on traits, such as body size. Despite this, it has been difficult to estimate the impact of traits on competitive ability from ecological...

Data from: The edaphic control of plant diversity

Catherine Hulshof & Marko Spasojevic
BACKGROUND: The central thesis of plant ecology is that climate determines the distribution of global vegetation. Within a vegetation type, however, finer-scale environmental features such as the physical and chemical properties of soil (edaphic variation) control plant distributions and diversity patterns. AIMS: Here, we review the literature to provide a mechanistic framework for the edaphic control of plant diversity. First, we review three examples where soils have known, prevalent effects on plant diversity: during soil...

Supplement 1: Challenges Faced by Neurology Trainees in a Neuro-Intervention Career Track

Conrad Liang
Introduction: The widespread adoption of endovascular therapy (EVT) for emergent large vessel occlusion (LVO) has led to increased nationwide demand for neuro-interventionalists, heightened interest among Neurology residents to pursue neuro-intervention (NI) as a career, and increased importance of NI exposure for all Neurologists who care for patients with AIS. Currently, exposure to NI and its career path are not well-defined for Neurology trainees. Methods: The Society for Vascular and Interventional Neurology (SVIN) Education Committee conducted...

Data for: Scaling relationships in Formica ants with continuous worker size variation

Jessica Purcell, Shirley Tawdros & Mari West
Social insects exhibit highly variable body plans at multiple scales: within colonies, between conspecific colonies, and across different species. The interspecific variation in the existence and prevalence of morphologically discrete worker subcastes in social insects raises questions about the ontogeny and functional importance of alternative worker body plans. Here, we examine the allometry of four Formicaspecies. Formica are among the most common ants in the northern hemisphere temperate zone, and species vary greatly in the...

Data from: Dominant bee species and floral abundance drive parasite temporal dynamics in plant-pollinator communities

Peter Graystock, Wee Hao Ng, Kyle Parks, Amber D. Tripodi, Paige A. Muñiz, Ashley A. Fersch, Christopher R. Myers, Quinn S. McFrederick & Scott H. McArt
Pollinator declines can leave communities less diverse and potentially at increased risk to infectious diseases. Species-rich plant and bee communities have high species turnover, making the study of disease dynamics challenging. To address how temporal dynamics shape parasite prevalence in plant and bee communities, we screened >5,000 bees and flowers through an entire growing season for five common bee microparasites (Nosema ceranae, N. bombi, Crithidia bombi, C. expoeki and neogregarines). Over 110 bee species and...

Registration Year

  • 2020

Resource Types

  • Dataset


  • University of California, Riverside
  • United States Department of Agriculture
  • Imperial College London
  • University of California, Irvine
  • Cornell University
  • University of Montana
  • University of California, Merced
  • University of California, San Diego
  • Dalhousie University
  • San Diego State University