310 Works

Data from: Snow-mediated plasticity does not prevent camouflage mismatch

Alexander Kumar, Marketa Zimova, James Sparks & L Scott Mills
Global reduction in snow cover duration is one of the most consistent and widespread climate change outcomes. Declining snow duration has severe negative consequences for diverse taxa including seasonally color molting species, which rely on snow for camouflage. However, phenotypic plasticity may facilitate adaptation to reduced snow duration. Plastic responses could occur in the color molt phenology or through behavior that minimizes coat color mismatch or its consequences. We quantified molt phenology of 200 wild...

Data from: Riparian habitat restoration increases the availability and occupancy of Yellow-breasted Chat territories but brood parasitism is the primary influence on reproductive performance

Timothy Robert Forrester, David J. Green, René McKibbin, A. Michael Bezener & Christine A. Bishop
Implementation and evaluation of conservation efforts requires an understanding of the habitat selection and reproductive success of endangered populations. As populations recover, established territory holders may force new arrivals into lower-quality habitat, which can reduce reproductive success, especially in disturbed landscapes where suitable habitat is scarce. The endangered Western Yellow-breasted Chat (Icteria virens auricollis) population in the fragmented riparian zone of the Okanagan Valley, British Columbia, Canada, has rapidly increased in response to habitat restoration....

Sex linkage of the skeletal muscle sodium channel gene (SCN4A) explains apparent deviations from Hardy–Weinberg equilibrium of tetrodotoxin-resistance alleles in garter snakes (Thamnophis sirtalis)

Kerry Gendreau, Michael Hague, Chris Feldman, , & Joel McGlothlin
The arms race between tetrodotoxin-bearing Pacific newts (Taricha) and their garter snake predators (Thamnophis) in western North America has become a classic example of coevolution, shedding light on predator-prey dynamics, the molecular basis of adaptation, and patterns of convergent evolution. Newts are defended by tetrodotoxin (TTX), a neurotoxin that binds to voltage-gated sodium channels (Nav proteins), arresting electrical activity in nerves and muscles and paralyzing would-be predators. However, populations of the common garter snake (T....

How climate impacts the composition of wolf killed-elk in northern Yellowstone National Park

Christopher Wilmers, Matthew Metz, Daniel Stahler, Michel Kohl, Chris Geremia & Douglas Smith
1. While the functional response of predators is commonly measured, recent work has revealed that the age and sex composition of prey killed is often a better predictor of prey population dynamics because the reproductive value of adult females is usually higher than that of males or juveniles. 2. Climate is often an important mediating factor in determining the composition of predator kills, but we currently lack a mechanistic understanding of how the multiple facets...

Landscape connectivity and genetic structure in a mainstem and a tributary stonefly (Plecoptera) species using a novel reference genome

Rachel Malison, Rachel L Malison, Brian K Hand, Emily Winter, J Joseph Giersch, Stephen J Amish, Diane Whited, Jack A Stanford & Gordon Luikart
Abstract Understanding how environmental variation influences population genetic structure can help predict how environmental change influences population connectivity, genetic diversity, and evolutionary potential. We used riverscape genomics modelling to investigate how climatic and habitat variables relate to patterns of genetic variation in two stonefly species, one from mainstem river habitats (Sweltsa coloradensis) and one from tributaries (Sweltsa fidelis) in 40 sites in northwest Montana, USA. We produced a draft genome assembly for S. coloradensis (N50...

Population genomic consequences of life history and mating system adaptation to a geothermal soil mosaic in yellow monkeyflowers (common garden phenotype data)

Lila Fishman, Kory Kolis, Colette Berg & Thomas Nelson
Local selection can promote phenotypic divergence despite gene flow across habitat mosaics, but adaptation itself may generate substantial barriers to genetic exchange. In plants, life-history, phenology, and mating system divergence have been proposed to promote genetic differentiation in sympatry. In this study, we investigate phenotypic and genetic variation in Mimulus guttatus (yellow monkeyflowers) across a geothermal soil mosaic in Yellowstone National Park (YNP). Plants from thermal annual and nonthermal perennial habitats were heritably differentiated for...

Behavior and diet data collected from i) GPS video camera collars and ii) fecal samples collected from individuals from the Fortymile Caribou Herd

Libby Ehlers, Gabrielle Coulombe, Jim Herriges, Torsten Bentzen, Mike Suitor, Kyle Joly & Mark Hebblewhite
Summer diets are crucial for large herbivores in the subarctic and are affected by weather, harassment from insects and a variety of environmental changes linked to climate. Yet understanding foraging behavior and diet of large herbivores is challenging in the subarctic because of their remote ranges. We used GPS video-camera collars to observe behaviors and summer diets of the migratory Fortymile Caribou Herd (Rangifer tarandus granti) across Alaska, USA and the Yukon, Canada. First, we...

Data from: Invasive hybridization has variable effects on survival among salmonid populations

Jeffrey Strait, Ryan Kovach, Lisa Eby, Clint Muhlfeld, Matthew Boyer, Stephen Amish, Paul Lukacs, Winsor Lowe & Gordon Luikart
Human-mediated hybridization threatens global biodiversity, but the fitness consequences of hybridization are poorly understood, especially in vertebrates. We used capture-recapture data from 5,249 individuals in three hybridizing populations of invasive rainbow trout (Oncorhynchus mykiss) and native cutthroat trout (O. clarkii) to quantify the effects of rainbow trout genetic admixture and environmental conditions on survival. Seasonal variation in environmental conditions interacted with individual admixture to influence seasonal survival. Overall, annual survival declined with admixture at the...

Temporal stability of productivity is associated with complementarity and competitive intensities in intercropping

Jinpu Wu, Xingguo Bao, Jiudong Zhang, Binglin Lu, Weiping Zhang, Ragan M. Callaway & Long Li
Year to year stability in crop production is a crucial aspect of feeding a growing global population. Evidence from natural ecosystems shows that increasing plant diversity generally increases the temporal stability of productivity; however, we have little knowledge of the mechanisms by which diversity affects stability. In fact, understanding the drivers of stability is a major knowledge gap in our understanding of biodiversity and ecosystem function in general. We varied resource inputs into crop monocultures...

Data from: Scale-dependent genetic structure of the Idaho giant salamander (Dicamptodon aterrimus) in stream networks

Lindy Mullen, H. Woods, Michael Schwartz, Adam Sepulveda & Winsor Lowe
The network architecture of streams and rivers constrains evolutionary, demographic, and ecological processes of freshwater organisms. This consistent architecture also makes stream networks useful for testing general models of population genetic structure and the scaling of gene flow. We examined genetic structure and gene flow in the facultatively paedomorphic Idaho giant salamander, Dicamptodon aterrimus, in stream networks of Idaho and Montana, USA. We used microsatellite data to test population structure models by (1) examining hierarchical...

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