15 Works

Physiological acclimatization in high-latitude zooplankton

Vittoria Roncalli, Jeanette Niestroy, Matthew C. Cieslak Cieslak, Ann M. Castelfranco, Russell R. Hopcroft & Petra H. Lenz
How individual organisms adapt to non-optimal conditions through physiological acclimatization is central to predicting the consequences of unusual abiotic and biotic conditions such as those produced by marine heat waves. The Northeast Pacific, including the Gulf of Alaska experienced an extreme warming event (2014-2016, “The Blob”) that affected all trophic levels leading to large-scale changes in the community. The marine copepod Neocalanus flemingeri is one key member of the subarctic Pacific pelagic ecosystem. During the...

Climate and conspecific density inform phenotypic forecasting of juvenile Pacific salmon body size

Marta Ulaski, Heather Finkle, Anne Beaudreau & Peter Westley
1. Predicting effects of climate on fitness-linked phenotypic traits, such as body size, is important for the management and conservation of species in the face of global change. During sensitive life stages, small changes in mean trait values can have large effects on survival and population productivity. 2. The transition from freshwater to saltwater by migrating anadromous fishes such as Pacific salmon (genus Oncorhynchus) is a critical life history transition, where survival is mediated by...

Isotopic niche partitioning and individual specialization in an Arctic raptor guild

Devin L. Johnson, Michael T. Henderson, David L. Anderson, Travis L. Booms & Cory T. Williams
Intra- and inter-specific resource partitioning within predator communities is a fundamental component of trophic ecology, and one proposed mechanism for how populations partition resources is through individual niche variation. The Niche Variation Hypothesis (NVH) predicts that inter-individual trait variation leads to functional trade-offs in foraging efficiency, resulting in populations composed of individual dietary specialists. The degree to which niche specialization persists within a population is plastic and responsive to fluctuating resource availability. We quantified niche...

Data from: Above- and belowground drivers of intraspecific trait variability across subcontinental gradients for five ubiquitous forest plants in North America

Isabelle Aubin, Françoise Cardou, Alison Munson, Madhur Anand, André Arsenault, F. Wayne Bell, Yves Bergeron, Isabelle Boulangeat, Sylvain Delagrange, Nicole J. Fenton, Dominique Gravel, François Hébert, Jill Johnstone, S. Ellen Macdonald, Azim Mallik, Anne C.S. McIntosh, Jennie R. McLaren, Christian Messier, Dave Morris, Bill Shipley, Luc Sirois, Nelson Thiffault, Laura Boisvert-Marsh & Bright B. Kumordzi
Intraspecific trait variability (ITV) provides the material for species adaptation to environmental changes. To advance our understanding of how ITV can contribute to species adaptation to a wide range of environmental conditions, we studied five widespread understory forest species exposed to both continental-scale climate gradients, and local soil and disturbance gradients. We investigated the environmental drivers of between-site leaf and root trait variation, and tested whether higher between-site ITV was associated with increased trait sensitivity...

Warm acclimation alters antioxidant defences but not metabolic capacities in the Antarctic fish, Notothenia coriiceps

Kristin O'Brien, Cory Oldham, Jon Sarrimanolis, Autumn Fish, Luke Castellini, Jenna Vance, Hayley Lekanof & Elizabeth Crockett
The Southern Ocean surrounding the Western Antarctic Peninsula region is rapidly warming. Survival of members of the dominant suborder of Antarctic fishes, the Notothenioidei, will likely require thermal plasticity and adaptive capacity in key traits delimiting thermal tolerance. Herein, we have assessed the thermal plasticity of several cellular and biochemical pathways, many of which are known to be associated with thermal tolerance in notothenioids, including mitochondrial function, activities of aerobic and anaerobic enzymes, antioxidant defences,protein...

Stable isotope differences of polar bears in the Southern Beaufort Sea and Chukchi Sea

Malia Smith, Lara Horstmann & Raphaela Stimmelmayr
The life history, genetic, and habitat use differences between the 2 polar bear (Ursus maritimus) subpopulations in Alaska have been used to determine the geographic border separating them, but it has sparked a debate of the correct placement of the border for several years. Recently, the Southern Beaufort Sea (SBS) polar bear subpopulation has declined due to sea ice loss, while the Chukchi Sea (CS) subpopulation appears stable. To provide additional information about potential differences...

Circum-Arctic distribution of chemical anti-herbivore compounds arctic shrubs

Elin Lindén, Mariska Te Beest, Ilka Abreu, Thomas Moritz, Maja Sundqvist, Isabel C Barrio, Julia Boike, John Bryant, Kari Anne Bråthen, Agata Buchwal, Guillermo Bueno, Alain Cuerrier, Dagmar Egelkraut, Bruce Forbes, Martin Hallinger, Monique Heijmans, Luise Hermanutz, David S Hik, Annika Hofgaard, Milena Holmgren, Diane C Huebner, Toke Hoye, Ingibjörg Jónsdóttir, Elina Kaarlejärvi, Emilie Kissler … & Johan Olofsson
Spatial variation in plant chemical defence towards herbivores can help us understand variation in herbivore top-down control of shrubs in the Arctic and possibly also shrub responses to global warming. Less defended, non-resinous shrubs could be more influenced by herbivores than more defended, resinous shrubs. However, sparse field measurements limit our current understanding of how much of the circum-Arctic variation in defence compounds is explained by taxa or defence functional groups (resinous/non-resinous). We measured circum-Arctic...

Telomere length correlates with physiological and behavioural responses of a long-lived seabird to an ecologically-relevant challenge

Z Morgan Benowitz-Fredericks, Lindsay Lacey, Shannon Whelan, Alexis Will, Scott Hatch & Alexander Kitaysky
Determinants of individual variation in reallocation of limited resources towards self-maintenance versus reproduction are not well known. We tested the hypothesis that individual heterogeneity in long-term “somatic state” a) explains variation in endocrine and behavioural responses to environmental challenges, and b) is associated with variation in strategies for allocating to self-maintenance versus reproduction. We used relative telomere length as an indicator of somatic state and experimentally generated an abrupt short-term reduction of food availability (withdrawal...

A combined microbial and biogeochemical dataset from high-latitude ecosystems with respect to methane cycle

Maialen Barret, Laure Gandois, Frederic Thalasso, Karla Martinez Cruz, Armando Sepulveda Jauregui, Céline Lavergne, Roman Teisserenc, Polette Aguilar, Oscar Gerardo-Nieto2, Claudia Etchebehere, Bruna Martins Dellagnezze, Patricia Bovio-Winkler, Gilberto Fochesatto, Nikita Tananaev, Mette Svenning, Christophe Seppey, Alexander Tveit, Rolando Chamy, María Soledad Astorga-España, Andrés Mansilla, Anton Van De Putte, Maxime Sweetlove, Alison E Murray & Léa Cabrol
High latitudes are experiencing intense ecosystem changes with climate warming. The underlying methane (CH4) cycling dynamics remain unresolved, despite its crucial climatic feedback. Atmospheric CH4 emissions are heterogeneous, resulting from local geochemical drivers, global climatic factors, and microbial production/consumption balance. Holistic studies are mandatory to capture CH4 cycling complexity. Here, we report a large set of integrated microbial and biogeochemical data from 396 samples, using a concerted sampling strategy and experimental protocols. The study followed...

High-density genomic data reveal fine-scale population structure and pronounced islands of adaptive divergence in lake whitefish (Coregonus clupeaformis) from Lake Michigan

Yue Shi
Understanding patterns of genetic structure and adaptive variation in natural populations is crucial for informing conservation and management. Past genetic research using 11 microsatellite loci identified six genetic stocks of lake whitefish (Coregonus clupeaformis) within Lake Michigan, USA. However, ambiguity in genetic stock assignments suggested those neutral microsatellite markers did not provide adequate power for delineating lake whitefish stocks in this system, prompting calls for a genomics approach to investigate stock structure. Here, we generated...

Data from: Influence of different data cleaning solutions of point-occurrence records on downstream macroecological diversity models

Petra Fuehrding-Potschkat & Stefanie M. Ickert-Bond
Digital point-occurrence records from the Global Biodiversity Information Facility (GBIF) and other data providers enable a wide range of research in macroecology and biogeography. However, data errors may hamper immediate use. Manual data cleaning is time-consuming and often unfeasible, given that the databases may contain thousands or millions of records. Automated data cleaning pipelines are therefore of high importance. This study examined the extent to which cleaned data from six pipelines using data cleaning tools...

In a Time of Change: A nested ecosystem of environmental arts, humanities, and science collaboration

Mary Beth Leigh & Lissy Goralnik
The integration of environmental science with arts and humanities (eSAH) has the potential to advance public understanding of science while inspiring emotional responses and attitude shifts that lead to pro-environmental behavior. The In a Time of Change (ITOC) program, an eSAH incubator in Alaska, uses place as a boundary object to bridge relationships between artists, writers, and scientists. Participants co-investigate a place-based environmental theme over the course of a year, then present their work at...

Greenland mass trends from airborne and satellite altimetry during 2011–2020

Shfaqat Abbas Khan, Jonathan L. Bamber, Eric Rignot, Veit Helm, Andy Aschwanden, David M. Holland, Michiel R. Van Den Broeke, Michalea King, Brice Noël, Martin Truffer, Angelika Humbert, William Colgan, Saurabh Vijay & Peter Kuipers Munneke
We use satellite and airborne altimetry to estimate annual mass changes of the Greenland Ice Sheet. We estimate ice loss corresponding to a sea-level rise of 6.9±0.4 millimeters from April 2011 to April 2020, with the highest annual ice loss rate of 1.4 mm/yr sea-level equivalent from April 2019 to April 2020. On a regional scale, our annual mass loss timeseries reveals 10-15 m/yr dynamic thickening at the terminus of Jakobshavn Isbræ from April 2016...

Application of inverse theory for high spatial resolution reconstructions of thermospheric vector wind fields from Doppler shifts measured by a ground-based network of all-sky Fabry-Perot interferometers

John Elliott & Mark Conde
Several types of all-sky viewing Fabry-Perot Interferometers (FPI) have been developed since the 1990s for ground-based remote sensing of thermospheric winds. The Scanning Doppler Imager (SDI) is one such instrument, which provides temporally simultaneous line-of-sight observations from hundreds of independent look directions per instrument exposure. A geographically distributed network of such instruments increases spatial coverage and, at many locations, also provides overlapping observations along multiple independent lines-of-sight. Together, these characteristics significantly increase the density and...

Scaling of metabolic rate in hibernators: Translation of literature data: For a comment to Nespolo et al. (2022)

Øivind Tøien, Brian M. Barnes & Thomas Ruf
This spreadsheet provides a translation of data from the literature for the manuscript: Do bears hibernate in the woods? Comment on ‘Why bears hibernate? Redefining the scaling energetics of hibernation’, and includes both the background data for Figure 1 which is presented in the manuscript. Full reference for article it is commented on: Nespolo, R. F., Mejias, C., and Bozinovic, F. Why bears hibernate? Redefining the scaling energetics of hibernation. Proc. R. Soc. B. 2022;...

Registration Year

  • 2022
    15

Resource Types

  • Dataset
    14
  • Journal Article
    1

Affiliations

  • University of Alaska Fairbanks
    15
  • The Arctic University of Norway
    2
  • Melnikov Permafrost Institute of the Siberian Branch of the Russian Academy of Science
    2
  • University of Göttingen
    2
  • Simon Fraser University
    2
  • Alaska Department of Fish and Game
    2
  • Alfred Wegener Institute for Polar and Marine Research
    2
  • Indian Institute of Technology Roorkee
    1
  • Center for Research and Advanced Studies of the National Polytechnic Institute
    1
  • University of Washington
    1