14 Works

Parental age does not influence offspring telomeres during early life in common gulls (Larus canus)

Tuul Sepp, Richard Meitern, Britt Heidinger, Kristina Noreikiene, Kalev Rattiste, Peeter Hõrak, Lauri Saks, Jeffrey Kittilson, Janek Urvik & Mathieu Giraudeau
Parental age can affect offspring telomere length through heritable and epigenetic-like effects, but at what stage during development these effects are established is not well known. To address this, we conducted a cross-fostering experiment in common gulls (Larus canus) that enabled us distinguish between pre- and post-natal parental age effects on offspring telomere length. Whole clutches were exchanged after clutch completion within and between parental age classes (young and old) and blood samples were collected...

The probability of being infected with haemosporidian parasites increases with host age

Samuel Slowinski, Aidan Geissler, Nicole Gerlach, Britt Heidinger & Ellen Ketterson
In vertebrates, disease susceptibility often varies with age. Older individuals may be more susceptible than younger individuals due to senescent declines in immune function. Alternatively, disease susceptibility may decrease with age if older individuals are more likely to have had prior exposures to parasites and acquired adaptive immune responses that allowed them to resist future infections. Disease susceptibility can also vary with reproductive state, and reproductive hormones have been shown to increase infection susceptibility. Here...

Bean CAP Snap Bean Diversity Panel Passport Data

James R. Myers
The accessions used to create the Snap Bean Diversity Panel were 149 snap bean cultivars and germplasm lines selected from North American and European germplasm. This panel was developed with support from the Common Bean Coordinated Agriculture Project (USDA-NIFA grant no. 2009-85606-05964). The accompanying data set contains information, where known, about pod traits and plant growth habit, USDA-NPGS Plant Introduction (PI) number, who bred the cultivar, market class and pod sieve size, plant variety protection...

A meta-analysis of the influence of anthropogenic noise on terrestrial wildlife communication strategies

Cameron Duquette, Cameron Duquette, Torre Hovick & Scott Loss
1. Human-caused noise pollution dominates the soundscape of modern ecosystems, from urban centers to national parks. Though wildlife can generally alter their communication to accommodate many types of natural noise (e.g. wind, wave action, heterospecific communication), noise pollution from anthropogenic sources pushes the limits of wildlife communication flexibility by causing loud, low-pitched, and near-continuous interference. Because responses to noise pollution are variable and taxa-specific, multi-species risk assessments and mitigation are not currently possible. 2. We...

Performance and refinement of nitrogen fertilization tools

Curtis Ransom, Jason Clark, Gregory Bean, Christopher Bandura, Matthew Shafer, Newell Kitchen, James Camberato, Paul Carter, Richard Ferguson, Fabián Fernández, David Franzen, Carrie Laboski, David Myers, Emerson Nafziger & John Sawyer
Improving corn (Zea mays L.) N management is pertinent to economic and environmental objectives. However, there are limited comprehensive data sources to develop and test N fertilizer decision aid tools across a wide geographic range of soil and weather scenarios. Therefore, a public-industry partnership was formed to conduct standardized corn N rate response field studies throughout the U.S. Midwest. This research was conducted using a standardized protocol at 49 site-years across eight states over the...

Why did the chicken NOT cross the road? Anthropogenic development influences the movement of a grassland bird

David Londe, Robert Elmore, Craig Davis, Torre Hovick, Samuel Fuhlendorf & Jimmy Rutledge
Movement and selection are inherently linked behaviors that form the foundation of a species space-use patterns. Anthropogenic development in natural ecosystems can result in a variety of behavioral responses that can involve changes in either movement (speed or direction of travel) or selection (resources used) behaviors which in turn may cause differential population level consequences including loss of landscape level connectivity. Understanding how a species alters these different behaviors in response to human activity is...

VCF files for D. serrata transposable elements

Sarah Signor
Transposable elements are an important element of the complex genomic ecosystem. Transposable element insertion also appears to be bursty – either due to invasion of new transposable elements that are not yet repressed, de-repression due to instability of organismal defense systems, stress, or genetic variation in hosts. Here, we characterize the transposable element landscape in an important model Drosophila, D. serrata, and investigate variation in transposable element copy number between genotypes and in the population...

Experimentally elevated testosterone shortens telomeres across years in a free-living songbird

Britt Heidinger, Samuel Slowiniski, Aubrey Sirman, Nicole Gerlach & Ellen Ketterson
Reproductive investment often comes at a cost to longevity, but the mechanisms that underlie these long-term effects are not well understood. In male vertebrates, elevated testosterone has been shown to increase reproductive success, but simultaneously decrease survival. One factor that may contribute to or serve as a biomarker of these long-term effects of testosterone on longevity is telomeres, which are often positively related to lifespan and have been shown to shorten in response to reproduction....

Data from: Thermal history of alfalfa leafcutting bees affects nesting and diapause incidence

Kayla Earls, Kendra Greenlee, Monique Porter & Joseph Rinehart
Variable spring temperatures may expose developing insects to sublethal conditions, resulting in long-term consequences. The alfalfa leafcutting bee, Megachile rotundata, overwinters as a prepupa inside a brood cell, resuming development in spring. During these immobile stages of development, bees must tolerate unfavourable temperatures. In this study, we test how exposure to low temperature stress during development affects subsequent reproduction and characteristics of the F1 generation. Developing male and female M. rotundata were exposed to either...

Distribution of earthworm growth stages along a naturally occurring soil salinity gradient

Caley Gasch, Rodney Utter & Abbey Wick

Environmental impacts on diapause and survival of the alfalfa leafcutting bee, Megachile rotundata

Elisabeth Wilson, Claire Murphy, Covey Wong, Joseph Rinehart, George Yocum & Julia Bowsher
Megachile rotundata exhibits a facultative prepupal diapause but the cues regulating diapause initiation are not well understood. Possible cues include daylength and temperature. Megachile rotundata females experience changing daylengths over the nesting season that may influence diapause incidence in their offspring through a maternal effect. Juvenile M. rotundata spend their developmental period confined in a nesting cavity, potentially subjected to stressful temperatures that may affect diapause incidence and survival. To estimate the impact of daylength...

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...

Fine-scale habitat selection limits trade-offs between foraging and temperature in a grassland bird

David Londe, R. Dwayne Elmore, Craig Davis, Samuel Fuhlendorf, Torre Hovick, Barney Luttbeg & Jimmy Rutledge
Many species are frequently faced with the decision about how to balance the use of thermal refuge against access to food resources. We evaluated the habitat use of female greater prairie-chickens (Tympanuchus cupido) to assess the potential for trade-offs between thermal conditions and food resources during the habitat selection process. Our objectives were to 1) compare near-ground temperatures, invertebrate availability, and vegetation characteristics at sites used by greater prairie-chickens to conditions at random landscape locations...

Longer telomeres during early life predict higher lifetime fitness in females but not males

David Westneat & Britt Heidinger
The mechanisms that contribute to variation in lifetime reproductive success are not well understood. One possibility is that telomeres, conserved DNA sequences at chromosome ends that often shorten with age and stress exposures, may reflect differences in vital processes or themselves influence fitness. Telomere length often predicts longevity, but longevity is only one component of fitness and little is known about how longevity and lifetime reproductive success relate to telomere dynamics in wild populations. We...

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