23 Works

Osteology of the late Triassic bipedal archosaur Poposaurus gracilis (Archosauria: Pseudosuchia) from Western North America

Emma R. Schachner, Randall B. Irmis, Adam K. Huttenlocker, Kent Sanders, Robert L. Cieri & Sterling J. Nesbitt
Poposaurus gracilis is a bipedal pseudosuchian archosaur that has been poorly understood since the discovery of the holotype fragmentary partial postcranial skeleton in 1915. Poposaurus. gracilis is a member of Poposauroidea, an unusually morphologically divergent clade of pseudosuchians containing taxa that are bipedal, quadrupedal, toothed, edentulous, and some individuals with elongated thoracic neural spines (i.e., sails). In 2003, a well preserved, fully articulated, and nearly complete postcranial skeleton of P. gracilis was discovered with some...

Water-borne and plasma corticosterone are not correlated in spotted salamanders

Alice Millikin, Sarah Woodley, Drew Davis, Ignacio Moore & James Anderson
Water-borne hormone measurement is a noninvasive method suitable for amphibians of all sizes that are otherwise difficult to sample. For this method, containment-water is assayed for hormones released by the animal. Originally developed in fish, the method has expanded to amphibians, but requires additional species-specific validations. We wanted to determine physiological relevance of water-borne corticosterone in spotted salamanders (Ambystoma maculatum) by comparing concentrations to those taken using established corticosterone sampling methods, such as plasma. Using...

Data from: Chronology of reproductive investment determines predation risk aversion in a felid-ungulate system

Daniel Crawford, Michael J Cherry, Brian D Kelly, Elina P Garrison, David Shindle, L Mike Conner, Richard B Chandler & Karl V Miller
Fear of predators can behaviorally mediate prey population dynamics, particularly when predation risk influences reproductive investment. However, the costs of reproductive investment may mitigate predation risk aversion relative to periods when the link between reproductive output and prey behavior is weaker. We posit that intensity of reproductive investment in ungulates may predict their response to predation risk such that the sexes increase risk exposure during biological seasons that are pivotal to reproductive success, such as...

Precision mapping of snail habitat provides a powerful indicator of human schistosomiasis transmission

Chelsea Wood, Susanne Sokolow, Isabel Jones, Andrew Chamberlin, Kevin Lafferty, Armand Kuris, Merlijn Jocque, Skylar Hopkins, Grant Adams, Julia Buck, Andrea Lund, Ana Garcia-Vedrenne, Evan Fiorenza, Jason Rohr, Fiona Allan, Bonnie Webster, Muriel Rabone, Joanne Webster, Lydie Bandagny, Raphael Ndione, Simon Senghor, Anne-Marie Schacht, Nicolas Jouanard, Gilles Riveau & Giulio De Leo
Recently, the World Health Organization recognized that efforts to interrupt schistosomiasis transmission through mass drug administration have been ineffective in some regions; one of their new recommended strategies for global schistosomiasis control emphasizes targeting the freshwater snails that transmit schistosome parasites. We sought to identify robust indicators that would enable precision targeting of these snails. At the site of the world’s largest recorded schistosomiasis epidemic—the Lower Senegal River Basin in Senegal—intensive sampling revealed positive relationships...

Data from: The relationship between plumage coloration and aggression in female tree swallows

Michelle Beck & William Hopkins
Intrasexual competition is an important selective force that can favor the evolution of honest signals of fighting ability. Research has focused predominantly on male birds, but many female birds also possess plumage ornaments that could mediate the outcome of competitive interactions. We examined the relationship between blue and white structural coloration and aggression in female tree swallows (Tachycineta bicolor). Tree swallows are secondary cavity nesters and females show delayed plumage maturation which may be related...

Data from: Resource allocation trade-offs and the loss of chemical defences during apple domestication

Susan R. Whitehead & Katja Poveda
Background and Aims: Most crops have been dramatically altered from their wild ancestors with the primary goal of increasing harvestable yield. A long-held hypothesis is that increased allocation to yield has reduced plant investment in defence and resulted in crops that are highly susceptible to pests. However, clear demonstrations of these trade-offs have been elusive due to the many selective pressures that occur concurrently during crop domestication. Methods: To provide a robust test of whether...

Data from: Long-term population dynamics of dreissenid mussels (Dreissena polymorpha and D. rostriformis): a cross-system analysis

David L. Strayer, Boris V. Adamovich, Rita Adrian, David C. Aldridge, Csilla Balogh, Lyubov E. Burlakova, Hannah B. Fried-Petersen, László G.‐Tóth, Amy L. Hetherington, Thomas S. Jones, Alexander Y. Karatayev, Jacqueline B. Madill, Oleg A. Makarevich, J. Ellen Marsden, Andre L. Martel, Dan Minchin, Thomas F. Nalepa, Ruurd Noordhuis, Timothy J. Robinson, Lars G. Rudstam, Astrid N. Schwalb, David R. Smith, Alan D. Steinman & Jonathan M. Jeschke
Dreissenid mussels (including the zebra mussel Dreissena polymorpha and the quagga mussel D. rostriformis) are among the world's most notorious invasive species, with large and widespread ecological and economic effects. However, their long‐term population dynamics are poorly known, even though these dynamics are critical to determining impacts and effective management. We gathered and analyzed 67 long‐term (>10 yr) data sets on dreissenid populations from lakes and rivers across Europe and North America. We addressed five...

Data from: Integrating spatial structure and interspecific and intraspecific plant–soil feedback effects and responses into community structure

Sa Xiao, Dan Z. Atwater & Ragan M. Callaway
Plant-soil feedbacks have important effects on plant communities, but most theory has been derived from experiments on intraspecific plant-soil feedbacks. Much less is known about how interspecific plant-soil feedbacks affect coexistence and plant communities, due in part to experimental and analytical challenges. Here, we propose a framework for evaluating plant-soil feedbacks among multiple interacting species that incorporates 1) the average effect each species has on conspecific and heterospecific neighbors via how they modify soil biota,...

Data from: Migratory shorebird adheres to Bergmann’s Rule by responding to environmental conditions through the annual lifecycle

Daniel Gibson, Angela D. Hornsby, Mary B. Brown, Jonathan B. Cohen, Lauren R. Dinan, James D. Fraser, Meryl J. Friedrich, Cheri L. Gratto-Trevor, Kelsi L. Hunt, Matthew Jeffery, Joel G. Jorgensen, Peter W. C. Paton, Samantha G. Robinson, Jen Rock, Michelle L. Stantial, Chelsea E. Weithman & Daniel H. Catlin
The inverse relationship between body size and environmental temperature is a widespread ecogeographic pattern. However, the underlying forces that produce this pattern are unclear in many taxa. Expectations are particularly unclear for migratory species, as individuals may escape environmental extremes and reorient themselves along the environmental gradient. In addition, some aspects of body size are largely fixed while others are environmentally flexible and may vary seasonally. Here, we used a long‐term dataset that tracked multiple...

Data from: Genome-wide inference of somatic translocation events during potato dihaploid production

Gina M. Pham, Guilherme T. Braz, Megan Conway, Emily Crisovan, John P. Hamilton, F. Parker E. Laimbeer, Norma Manrique-Carpintero, Linsey Newton, David S. Douches, Jiming Jiang, Richard E. Veilleux & C. Robin Buell
Potato (Solanum tuberosum L.) breeders often use dihaploids, which are 2× progeny derived from 4× autotetraploid parents. Dihaploids can be used in diploid crosses to introduce new genetic material into breeding germplasm that can be integrated into tetraploid breeding through the use of unreduced gametes in 4× by 2× crosses. Dihaploid potatoes are usually produced via pollination by haploid inducer lines known as in vitro pollinators (IVP). In vitro pollinator chromosomes are selectively degraded from...

Data from: Assessing combinability of phylogenomic data using Bayes Factors

Suman Neupane, Karolina Fučíková, Louise A Lewis, Lynn Kuo, Ming-Hui Chen & Paul Lewis
With the rapid reduction in sequencing costs of high-throughput genomic data, it has become commonplace to use hundreds of genes to infer phylogeny of any study system. While sampling a large number of genes has given us a tremendous opportunity to uncover previously unknown relationships and improve phylogenetic resolution, it also presents us with new challenges when the phylogenetic signal is confused by differences in the evolutionary histories of sampled genes. Given the incorporation of...

The microbial associates of precipitation over four seasons, at three locations in the United States

Ken Aho, C.F. Weber, J. T. Werth, A. L. H. Bayless-Edwards, R. Joyce, B. C. Christner, K. Failor, B. A. Vinatzer, D. G. Schmale III & C. E. Morris
These data were used in a paper accepted in Ecological Monographs on 17 September 2019, entitled "Spatiotemporal patterns of microbial composition and diversity in precipitation", hereafter Aho et al. (in press). Microbes in the atmosphere have broad ecological impacts, including the potential to trigger precipitation through species and strains that act as ice nucleation particles. To characterize spatiotemporal trends of microbial assemblages in precipitation we sequenced 16S (bacterial) and 18S (fungal) rRNA gene amplicon libraries...

Data from: Integrated population models: bias and inference

Thomas V. Riecke, Perry J. Williams, Tessa L. Behnke, Daniel Gibson, Alan G. Leach, Benjamin S. Sedinger, Phillip A. Street & James S. Sedinger
Integrated population models (hereafter, IPMs) have become increasingly popular for the modeling of populations, as investigators seek to combine survey and demographic data to understand processes governing population dynamics. These models are particularly useful for identifying and exploring knowledge gaps within datasets, because they allow investigators to estimate biologically meaningful parameters, such as immigration and reproduction, that are uninformed by data. As IPMs have been developed relatively recently, model behavior remains relatively poorly understood. Much...

Data from: Plant-bacteria-soil response to frequency of simulated nitrogen deposition has implications for global ecosystem change

Jirong Cao, Shuang Pang, Qibing Wang, Mark Williams, Xiu Jia, Shasha Dun, Junjie Yang, Yunhai Zhang, Jing Wang, Xiaotao Lü, Yecui Hu, Linghao Li, Yuncong Li & Xingguo Han
Atmospheric nitrogen (N) deposition, generally, has been simulated through a single or relatively few N applications per year for its ecological effect study. Despite the importance of timing in ecosystem processes, ecological experiments with more realistic N addition frequencies are rare. We employed a novel design with typical twice (2X) vs. atypical monthly (12X) N applications per year to explore effects of N addition frequency on above- and below-ground biodiversity and function. Each year, several...

Deer movement and resource selection during Hurricane Irma: implications for extreme climatic events and wildlife

Heather Abernathy, Daniel Crawford, Elina Garrison, Richard Chandler, L. Mike Conner, Karl Miller & Michael Cherry
Extreme climatic events (ECEs) are increasing in frequency and intensity and this necessitates understanding their influence on organisms. Animal behavior may mitigate the effects of ECEs, but field studies are rare because ECEs are infrequent and unpredictable. Hurricane Irma made landfall in southwestern Florida where we were monitoring white-tailed deer (Odocoileus virginianus seminolus) with GPS collars. We report on an opportunistic case study of behavioral responses exhibited by a large mammal during an ECE, mitigation...

Intangible Assets in Valuation in the Hospitality Industry

Ruixue Du, Yuan Li & Manisha Singal
In publicly traded firms, there is usually a discrepancy between the market value and the book value of the firm, often due to the valuation of intangible assets. Understanding this discrepancy is import- ant for investors, especially in the service industries like hospitality, where there is considerable industry disruption and consolidation. In this study we examine the effect of four intangible asset investments—research and development (R&D), training, advertising, and pension—on the market premium of restaurant...

Data from: Exogenous glucocorticoids amplify the costs of infection by reducing resistance and tolerance, but effects are mitigated by co-infection

Laura A. Schoenle, Ignacio T. Moore, Alana M. Dudek, Ellen B. Garcia, Morgan Mays, Mark F. Haussmann, Daniela Cimini & Frances Bonier
Individual variation in parasite defenses, such as resistance and tolerance, can underlie heterogeneity in fitness and could influence disease transmission dynamics. Glucocorticoid hormone concentrations often change in response to fluctuating environmental conditions and mediate changes in immune function, resource allocation, and tissue repair. Thus, changes in glucocorticoid hormone concentrations might mediate individual variation in investment in resistance versus tolerance. In this study, we experimentally increased glucocorticoid concentrations in red-winged blackbirds (Agelaius phoeniceus) that were naturally...

Reduced cooperative courtship behavior as a cost of high testosterone in a lekking passerine bird

Ben Vernasco & Ignacio Moore
Many studies have identified the reproductive benefits of cooperative behaviors, yet few have identified the mechanisms that underlie these behaviors. Mechanistic studies can inform our understanding of why some individuals are more or less cooperative as well as identify the physiological constraints imposed upon the evolution of reproductive traits. Male wire-tailed manakins (Pipra filicauda) exhibit cooperative courtship behaviors and more cooperative territory-holders have been shown to exhibit higher reproductive success. To begin to understand the...

Data from: Prolonged exposure to manure from livestock administered antibiotics decreases ecosystem carbon-use efficiency and alters nitrogen cycling

Carl Wepking, Brian Badgley, Jeb Barrett, Katharine Knowlton, Jane Lucas, Kevan Minick, Partha Ray, Sarah Shawver & Michael Strickland
Microbial communities drive soil ecosystem function but are also susceptible to environmental disturbances. We investigated whether exposure to manure sourced from cattle either administered or not administered antibiotics affected microbially-mediated terrestrial ecosystem function. We quantified changes in microbial community composition via amplicon sequencing, and terrestrial elemental cycling via a stable isotope pulse-chase. Exposure to manure from antibiotic-treated cattle caused: i) changes in microbial community structure; and ii) alterations in elemental cycling throughout the terrestrial system....

Phenotypic variability can promote the evolution of adaptive plasticity by reducing the stringency of natural selection

Jeremy Draghi
Adaptive phenotypic plasticity is a potent but not ubiquitous solution to environmental heterogeneity, driving interest in what factors promote and limit its evolution. Here a novel computational model representing stochastic information flow in development is used to explore evolution from a constitutive phenotype to an adaptively plastic response. Results show that populations tend to evolve robustness to developmental stochasticity, but this evolved robustness limits evolvability; specifically, robust genotypes have less ability to evolve adaptive plasticity...

Data from: Ant seed removal in a non-myrmecochorous Neotropical shrub: implications for seed dispersal

Seanne Clemente & Susan Whitehead
This study investigated ant seed removal of Piper sancti-felicis, an early successional Neotropical shrub. Neotropical Piper are a classic example of bat-dispersed plants, but we suggest that ants are underappreciated dispersal agents. We identified eleven ant species from the genera Aphaenogaster, Ectatomma, Paratrechina, Pheidole, Trachymyrmex, and Wasmannia recruiting to and harvesting P. sancti-felicis seeds in forest edge and secondary forest sites at La Selva, Costa Rica. We also tested for differences in ant recruitment to...

Data from: Dietary resource overlap among three species of frugivorous bat in Costa Rica

Lauren D. Maynard, Ariana Ananda, Maria F. Sides, Hannah Burk & Susan R. Whitehead
The maintenance of biodiversity in tropical forests is thought to be dependent on fine-scale mechanisms of niche partitioning that allow species to coexist. This study examined whether three species of short-tailed fruit bat that co-occur at a lowland tropical forest site in Costa Rica (Carollia castanea, C. perspicillata, C. sowelli) avoid inter- and intraspecific competition through dietary specialization on species in the genus Piper. First, dietary composition was examined using faecal samples (n = 210),...

Data from: Brain-wide cellular resolution imaging of Cre transgenic zebrafish lines for functional circuit-mapping

Kathryn M. Tabor, Gregory D. Marquart, Christopher Hurt, Trevor S. Smith, Alexandra K Geoca, Ashwin A Bhandiwad, Abhignya Subedi, Jennifer L. Sinclair, Hannah M Rose, Nicholas F Polys & Harold A. Burgess
Decoding the functional connectivity of the nervous system is facilitated by transgenic methods that express a genetically encoded reporter or effector in specific neurons; however, most transgenic lines show broad spatiotemporal and cell-type expression. Increased specificity can be achieved using intersectional genetic methods which restrict reporter expression to cells that co-express multiple drivers, such as Gal4 and Cre. To facilitate intersectional targeting in zebrafish, we have generated more than 50 new Cre lines, and co-registered...

Registration Year

  • 2019
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Resource Types

  • Dataset
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  • Text
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Affiliations

  • Virginia Tech
    23
  • Cornell University
    3
  • University of Georgia
    2
  • State University of New York
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  • University of Florida
    2
  • Grand Valley State University
    1
  • University of Guam
    1
  • University of Montana
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  • University of Washington
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  • Stanford University
    1