64 Works

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...

Data from: Age, oxidative stress exposure and fitness in a long-lived seabird

Katherine A. Herborn, Francis Daunt, Britt J. Heidinger, Hanna M. V. Granroth-Wilding, Sarah J. Burthe, Mark A. Newell & Pat Monaghan
The need to manage exposure to oxidative stress, which can damage macromolecules, is thought to influence the resolution of life history trade-offs. Oxidative damage is expected to increase with age as a consequence of changes in the optimal investment in defences or repair, and/or because of senescence in antioxidant defence systems, though the pattern might differ between short and long-lived species. However, data on age related changes in damage levels in wild populations are rare....

Data from: Agriculturally dominated landscapes reduce bee phylogenetic diversity and pollination services

Heather Grab, Michael G. Branstetter, Nolan Amon, Katherine R. Urban-Mead, Mia G. Park, Jason Gibbs, Eleanor J. Blitzer, Katja Poveda, Greg Loeb & Bryan N. Danforth
Land-use change threatens global biodiversity and may reshape the tree of life by favoring some lineages over others. Whether phylogenetic diversity loss compromises ecosystem service delivery remains unknown. We address this knowledge gap using extensive genomic, community, and crop datasets to examine relationships among land use, pollinator phylogenetic structure, and crop production. Pollinator communities in highly agricultural landscapes contain 230 million fewer years of evolutionary history; this loss was strongly associated with reduced crop yield...

Data from: Sound amplification by means of a horn-like roosting structure in Spix's disc-winged bat

Gloriana Chaverri & Erin H. Gillam
While sound is a signal modality widely used by many animals, it is very susceptible to attenuation, hampering effective long-distance communication. A strategy to minimize sound attenuation that has been historically used by humans is to use acoustic horns; to date, no other animal is known to use a similar structure to increase sound intensity. Here, we describe how the use of a roosting structure that resembles an acoustic horn (the tapered tubes that form...

Data from: Combined effects of night warming and light pollution on predator-prey interactions

Colleen R. Miller, Brandon T. Barton, Likai Zhu, Volker C. Radeloff, Kerry M. Oliver, Jason P. Harmon & Anthony R. Ives
Interactions between multiple anthropogenic environmental changes can drive non-additive effects in ecological systems, and the non-additive effects can in turn be amplified or dampened by spatial covariation among environmental changes. We investigated the combined effects of night-time warming and light pollution on pea aphids and two predatory ladybeetle species. As expected, neither night-time warming nor light pollution changed the suppression of aphids by the ladybeetle species that forages effectively in darkness. However, for the more-visual...

Data from: Physconia labrata, a new species from western North America and Asia

Theodore L. Esslinger, Bruce McCune & Diane L. Haughland
A new species belonging to the lichen genus Physconia is described from Alaska and the Canadian and American Rocky Mountains and adjacent forested regions. It is also reported from China, Nepal, India and Siberia. The new species, Physconia labrata, is superficially similar to P. perisidiosa, but can be distinguished by having a blackened, corticate lower surface and a paraplectenchymatous upper cortex.

Data from: Paceless life? a meta-analysis of the pace-of-life syndrome hypothesis

Raphaël Royauté, Monica Anderson Berdal, Courtney R. Garrison & Ned A. Dochtermann
The pace-of-life syndrome hypothesis predicts that individual differences in behaviour should integrate with morphological, physiological, and life-history traits along a slow to fast pace-of-life continuum. For example, individuals with a “slow” pace-of-life are expected to exhibit a slower growth rate, delayed reproduction, longer lifespans, have stronger immune responses, and are expected to avoid risky situations relative to “fast” individuals. If supported this hypothesis would help resolve ecological and evolutionary questions regarding the origin and maintenance...

Data from: The heritability of behavior: a meta-analysis

Ned A. Dochtermann, Tori Schwab, Monica Anderson Berdal, Jermey Dalos & Raphael Royaute
The contribution of genetic variation to phenotypes is a central factor in whether and how populations respond to selection. The most common approach to estimating this influences is via the calculation of heritabilities, which summarize the contribution of genetic variation to phenotypic variation. Heritabilities also indicate the relative affect of genetic variation on phenotypes versus that of environmental sources of variation. For labile traits like behavioral responses, life-history traits, and physiological responses, estimation of heritabilities...

Data from: Fungal specificity and selectivity for algae play a major role in determining lichen partnerships across diverse ecogeographic regions in the lichen-forming family Parmeliaceae

Steven D. Leavitt, Ekaphan Kraichak, Matthew P. Nelsen, Susanne Altermann, Pradeep K. Divakar, David Alors, Theodore L. Esslinger, Ana Crespo, H. Thorsten Lumbsch & Thorsten Lumbsch
Microbial symbionts are instrumental to the ecological and long-term evolutionary success of their hosts, and the central role of symbiotic interactions is increasingly recognized across the vast majority of life. Lichens provide an iconic group for investigating patterns in species interactions; however, relationships among lichen symbionts are often masked by uncertain species boundaries or an inability to reliably identify symbionts. The species-rich lichen-forming fungal family Parmeliaceae provides a diverse group for assessing patterns of interactions...

Data from: Pyric-carnivory: raptor use of prescribed fires

Torre J. Hovick, Devan A. McGranahan, Robert Dwayne Elmore, John R. Weir & Samuel D. Fuhlendorf
Fire is a process that shaped and maintained most terrestrial ecosystems worldwide. Changes in land use and patterns of human settlement have altered fire regimes and led to fire suppression resulting in numerous undesirable consequences spanning individual species and entire ecosystems. Many obvious and direct consequences of fire suppression have been well studied, but several, albeit less obvious, costs of alteration to fire regimes on wildlife are unknown. One such phenomenon is the response of...

Survival of extreme heat related to circadian cycle and sex in bees

Giancarlo Lopez-Martinez
The pollination services provided by insects have been a crucial part of evolution and survival for many species, including humans. For bees to be efficient pollinators they must survive the environmental insults they face daily. Thus, looking into the short- and long-term effects of heat exposure on bee performance provides us with a foundation for investigating how stress can affect insect pollination. Solitary bees are a great model for investigating the effects of environmental stress...

Data from: Selection on bristle length has the ability to drive the evolution of male abdominal appendages in the sepsid fly Themira biloba

Bodini Herath, Ned A. Dochtermann, Joshua I. Johnson, Zachary Leonard & Julia H. Bowsher
Many exaggerated and novel traits are strongly influenced by sexual selection. Although sexual selection is a powerful evolutionary force, underlying genetic interactions can constrain evolutionary outcomes. The relative strength of selection vs. constraint has been a matter of debate for the evolution of male abdominal appendages in sepsid flies. These abdominal appendages are involved in courtship and mating, but their function has not been directly tested. We performed mate choice experiments to determine whether sexual...

Data from: When the mean no longer matters: developmental diet affects behavioral variation but not population averages in the house cricket (Acheta domesticus)

Raphaël Royauté & Ned A. Dochtermann
Despite recent progress in elucidating the genetic basis for behavioral variation, the effects of the developmental environment on the maintenance and generation of behavioral variation across multiple traits remain poorly resolved. We investigated how nutritional status during development affected behavioral variation and covariance between activity in an open field test and response to cues of predator presence in the house cricket (Acheta domesticus). We provided 98 juvenile crickets with either a high or low quality...

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