16 Works

Episodes of high recruitment buffer against climate-driven mass mortality events in a North Pacific seabird population

Michael Johns, Pete Warzybok, Jaime Jahncke, Patricia Doak, Mark Lindberg & Greg Breed
Longitudinal studies of marked animals provide an opportunity to assess the relative contributions of survival and reproductive output to population dynamics and change. Cassin’s auklets are a long-lived seabird that maximizes annual reproductive effort in resource-rich years through a behavior called double brooding, the initiation of a second breeding attempt following the success of the first during the same season. Our objective was to explore whether double brooding influenced population change by contributing a greater...

Data from: Characterization of the abiotic drivers of abundance of nearshore Arctic fishes

Noah Khalsa, Kyle Gatt, Trent Sutton & Amanda Kelley
Fish are critical ecologically and socioeconomically for subsistence economies in the Arctic, an ecosystem undergoing unprecedented environmental change. Our understanding of the responses of nearshore Arctic fishes to environmental change is inadequate because of limited research on the physicochemical drivers of abundance occurring at a fine scale. Here, high-frequency in-situ measurements of pH, temperature, salinity, and dissolved oxygen were paired with daily fish catches in nearshore Alaskan waters of the Beaufort Sea. This dataset includes...

Data from: A mummified Pleistocene gray wolf pup

Julie Meachen, Matthew Wooller, Benjamin Barst, Juliette Funck, Carley Crann, Molly Cassatt-Johnstone, Beth Shapiro, Elizabeth Hall, Susan Hewitson, Jess Heath & Grant Zazula
Here we describe the oldest, most complete wolf pup mummy discovered to date: “Zhùr”, as she was named by the local indigenous Tr’ondëk Hwëch’in community was discovered in 2016 in Yukon, Canada, and is complete with skin, fur, and other soft tissues. We infer that Zhùr died ~57,000 years ago and was ~7 weeks old at death. Her mitochondrial genome falls within a clade comprising ancient Beringian and Russian wolf mitochondrial genomes, and isotopic analyses...

Gene tree discord, simplex plots, and statistical tests under the coalescent

John Rhodes, Elizabeth Allman, Jonathan Mitchell & John Rhodes
A simple graphical device, the simplex plot of quartet concordance factors, is introduced to aid in the exploration of a collection of gene trees on a common set of taxa. A single plot summarizes all gene tree discord, and allows for visual comparison to the expected discord from the multispecies coalescent model (MSC) of incomplete lineage sorting on a species tree. A formal statistical procedure is described that can quantify the deviation from expectation for...

Terrestrial lichen data for Northwest Territories, Canada

Jennifer Baltzer, Geneviève Degré-Timmons, Nicola Day, Steve Cumming, Merritt Turetsky & Jill Johnstone
Increased fire activity due to climate change may impact the successional dynamics of boreal forests, with important consequences for caribou habitat. Early successional forests have been shown to support lower quantities of caribou forage lichens, but geographic variation in, and controls on, the rates of lichen recovery have been largely unexplored. In this study, we sampled across a broad region in northwestern Canada to compare lichen biomass accumulation in ecoprovinces, including the Saskatchewan Boreal Shield,...

Data from: Walrus teeth as biomonitors of trace elements in Arctic marine ecosystems

Casey Clark, Lara Horstmann & Nicole Misarti
Effective biomonitoring requires an understanding of the factors driving concentrations of the substances or compounds of interest in the tissues of studied organisms. Biomonitoring of trace elements, and heavy metals in particular, has been the focus of much research; however, the complex roles many trace elements play in animal and plant tissues can make it difficult to disentangle environmental signals from physiology. This study examined the concentrations of 15 trace elements in the teeth of...

Gene flow influences the genomic architecture of local adaptation in six riverine fish species

Yue Shi, Kristen Bouska, Garrett Mckinney, William Dokai, Andrew Bartels, Megan McPhee & Wes Larson
Understanding how gene flow influences adaptive divergence is important for predicting adaptive responses. Theoretical studies suggest that when gene flow is high, clustering of adaptive genes in fewer genomic regions would protect adaptive alleles from recombination and thus be selected for, but few studies have tested it with empirical data. Here, we used RADseq to generate genomic data for six fish species with contrasting life histories from six reaches of the Upper Mississippi River System,...

Hypothalamic remodeling of thyroid hormone signaling during hibernation in the arctic ground squirrel

Helen Chmura, Cassie Duncan, Ben Saer, Jeanette Moore, Brian Barnes, C. Loren Buck, Helen Christian, Andrew Loudon & Cory Williams
These data were collected from arctic ground squirrels (Urocitellus parryii) between Summer 2016 and Spring 2019 on a collaborative NSF-funded project examining the neuroendocrine regulation of the transition between hibernation and reproduction. The three experiments consist of (1) a repeated cross-sectional study conducted in both males and females hibernating in constant darkness and constant temperature (2) an extreme mid-winter warming study conducted in males only and (3) an end of hibernation warming study conducted in...

Global impact of lightning-produced oxidants

Jingqiu Mao
Lightning plays a major role in tropospheric oxidation, and its role on modulating tropospheric chemistry was thought to be emissions of nitrogen oxides (NOx). Recent field and laboratory measurements demonstrate that lightning generates extremely large amounts of oxidants, including hydrogen oxides (HOx) and O3. We here implement the lightning-produced oxidants in a global chemical transport model to examine its global impact on tropospheric composition. We find that lightning-produced oxidants can increase global mass weighted OH...

A target enrichment probe set for resolving the flagellate land plant tree of life

Jesse W. Breinholt, Sarah B. Carey, George P. Tiley, E. Christine Davis, Lorena Endara, Stuart F. McDaniel, Leandro Neves, Emily B. Sessa, Matt Von Konrat, Susan Fawcett, Stefanie M. Ickert-Bond, Paulo H. Labiak, Juan Larraín, Marcus Lehnert, Lily R. Lewis, Nathalie S. Nagalingum, Nikisha Patel, Stefan A. Rensing, Weston Testo, Alejandra Vasco, Juan Carlos Villarreal, Evelyn Webb Williams, J. Gordon Burleigh, Sahut Chantanaorrapint, Leandro G. Neves … & Stefanie M. Ickert‐Bond
Premise of the Study: New sequencing technologies enable the possibility of generating large-scale molecular datasets for constructing the plant tree of life. We describe a new probe set for target enrichment sequencing to generate nuclear sequence data to build phylogenetic trees with any flagellate land plants, including hornworts, liverworts, mosses, lycophytes, ferns, and all gymnosperms. Methods and Results: We leveraged existing transcriptome and genome sequence data to design a set of 56,989 probes for target...

Data from: Assessing accuracy of GAP and LANDFIRE land cover datasets in winter habitats used by greater sage-grouse in Idaho and Wyoming, USA

Marcella R. Fremgen-Tarantino, Peter Olsoy, Graham G. Frye, John W. Connelly, Alan H. Krakauer, Gail L. Patricelli, Andrew Wright Child & Jennifer Sorensen Forbey

Ancient horse genomes reveal the timing and extent of dispersals across the Bering Land Bridge

Alisa Vershinina, Peter Heintzman, Duane Froese, Grant Zazula, Molly Cassatt-Johnstone, Love Dalén, Clio Der Sarkissian, Shelby Dunn, Luca Ermini, Cristina Gamba, Pamela Groves, Joshua Kapp, Daniel Mann, Andaine Seguin-Orlando, John Southon, Mathias Stiller, Matthew Wooller, Gennady Baryshnikov, Dmitry Gimranov, Eric Scott, Elizabeth Hall, Susan Hewitson, Irina Kirillova, Pavel Kosintsev, Fedor Shidlovsky … & Beth Shapiro
The Bering Land Bridge (BLB) last connected Eurasia and North America during the Pleistocene. Although the BLB would have enabled transfers of terrestrial biota in both directions, it also acted as an ecological filter whose permeability varied considerably over time. Here we explore the possible impacts of this ecological corridor on genetic diversity within, and connectivity among, populations of a once wide-ranging group, the caballine horses (Equus spp.). Using a panel of 187 mitochondrial and...

Data supplement for: Agreement of analytical and simulation-based estimates of the required land depth in climate models

Norman J. Steinert, J. Fidel González Rouco, Camilo A. Melo Aguilar, Félix García-Pereira, Elena García-Bustamante, Philipp De Vrese, Vladimir Alexeev, Johann H. Jungclaus, Stephan J. Lorenz & Stefan Hagemann
Many current-generation climate models have land components that are too shallow. Under climate change conditions, the long-term warming trend at the surface propagates deeper into the ground than the commonly used 3-10m. Shallow models alter the terrestrial heat storage and distribution of temperatures in the subsurface, influencing the simulated land-atmosphere interactions. Previous studies focusing on annual timescales suggest that deeper models are required to match subsurface-temperature observations and the classic analytical heat conduction solution. However,...

Dataset S1 - Noelaerhabdaceae organic carbon isotope culture data compilation

Samuel Phelps, Gwenn Hennon, Sonya Dyhrman, María Hernández-Limón, Olivia Williamson & Pratigya Polissar
The carbon isotope fractionation in algal organic matter (Ep), including the long-chain alkenones produced by the coccolithophorid family Noelaerhabdaceae, is used to reconstruct past atmospheric CO2 levels. The conventional proxy linearly relates Ep to changes in cellular carbon demand relative to diffusive CO2 supply, with larger Ep values occurring at lower carbon demand relative to supply (i.e. abundant CO2). However, the response of Gephyrocapsa oceanica, one of the dominant alkenone producers of the last few...

Thermal profiles reveal stark contrasts in properties of biological membranes from heart among Antarctic notothenioid fishes which vary in expression of hemoglobin and myoglobin

Elizabeth R. Evans, Amir M. Farnoud, Kristin M. O'Brien & Elizabeth L. Crockett
Antarctic notothenioids are noted for extreme stenothermy, yet underpinnings of their thermal limits are not fully understood. We hypothesized that properties of ventricular membranes could explain previously observed differences among notothenioids in temperature onset of cardiac arrhythmias and persistent asystole. Microsomes were prepared using ventricles from six species of notothenioids, including four species from the hemoglobin-less (Hb−) family Channichthyidae (icefishes), which also differentially express cardiac myoglobin (Mb), and two species from the (Hb+) Nototheniidae. We...

Daily abundance of Dall's sheep peaks during late summer in a seasonal habitat of high-management interest

Cody E. Deane, Barrett A. Flynn, Darren L. Bruning, Greg A. Breed & Kim A. Jochum
Informing conservation and management decisions for habitats frequented by species of high management interest often face the challenge of limited resources for conducting wildlife surveys. When surveys are focused on local areas or sparsely distributed species, it may also be difficult to obtain counts sufficient for implementing abundance models that account for imperfect detection. With replicated aerial surveys collected within a 70.25 km2 portion of the Eastern Alaska Range, Alaska, USA during the summers of...

Registration Year

  • 2021

Resource Types

  • Dataset


  • University of Alaska Fairbanks
  • University of California, Santa Cruz
  • Université Laval
  • University of Washington
  • Wilfrid Laurier University
  • Field Museum of Natural History
  • Duke University
  • The Arctic University of Norway
  • University of Vermont
  • University of Alberta