15 Works

Exceptional variation in the appearance of Common Murre eggs reveals their potential as identity signals

Robert Montgomerie, Tim Birkhead, Amelia Cox & Jamie Thompson
We studied the ground colors and maculations of 161 Common Murre (Uria aalge) eggs laid by 43 females in 3 small breeding groups on the cliffs of Skomer Island, Wales, in 2016–2018. Both the colors and maculations varied much more among than within females, providing quantitative evidence for the egg traits that might facilitate the parents’ ability to identify their own eggs on the crowded breeding ledges where the density is typically ~20 eggs m–2....

Year-round monitoring at a Pacific coastal campus reveals similar winter and spring collision mortality and high vulnerability of the Varied Thrush

Krista De Groot
Bird-window collisions are a leading cause of direct anthropogenic avian mortality, yet our state of knowledge regarding this threat relies heavily on eastern North American studies. Seasonal patterns of collision mortality may differ along the Pacific coast, and western North American species remain understudied. We therefore surveyed a stratified random sample of 8 buildings for collisions at the University of British Columbia, Vancouver, Canada over 45-day periods during 2 winters, 1 spring, 1 summer and...

Data to: Opportunities for the conservation of migratory birds to benefit threatened resident vertebrates in the Neotropics

Scott Wilson
Neotropical countries receive financing and effort from temperate nations to aid the conservation of migratory species that move between temperate and tropical regions. If allocated strategically, these resources could simultaneously contribute to other conservation initiatives. In this study, we use novel distribution maps to show how those resources could aid planning for the recovery of threatened resident vertebrates. Using eBird-based relative abundance estimates, we first identified areas with high richness of Neotropical migrant landbirds of...

Counts of shorebirds and environmental correlates at Roberts Bank, British Columbia (1991 to 2019)

Mark Drever & Scott Flemming
Data include counts conducted during northward migration of two species of shorebirds (Western Sandpiper Calidris mauri and Dunlin Calidris alpina) on the mudflats of Roberts Bank, British Columbia, 1991 to 2019. Count methodology detailed in Drever et al. (2014) and Canham et al. (2021). Data also include a set of covariates related to local conditions (precipitation, temperature, wind speed and direction, solar radiation, tidal amplitude, and water discharge rates from the Fraser River).

Evidence for synergistic cumulative impacts of marking and hunting in a wildlife species.

Frédéric LeTourneux, Gilles Gauthier, Roger Pradel, Josée Lefebvre & Pierre Legagneux
Non-additive effects from multiple interacting stressors can have unpredictable outcomes on wildlife. Stressors that initially have negligible impacts may become significant if they act in synergy with novel stressors. Wildlife markers can be a source of physiological stress for animals and are ubiquitous in ecological studies. Their potential impacts on vital rates may vary over time, particularly when changing environments impose new stressors. In this study, we evaluated the temporal changes in the combined impact...

Climate oscillations drive millennial-scale changes in seabird colony size

Matthew Duda, Frédéric Cyr, Gregory Robertson, Neal Michelutti, Carsten Meyer-Jacob, April Hedd, William Montevecchi, Linda Kimpe, Jules Blais & John Smol
Seabird population size is intimately linked to the physical, chemical, and biological processes of the oceans. Yet, the overall effects of long-term changes in ocean dynamics on seabird colonies are difficult to quantify. Here, we used dated lake sediments to reconstruct ~10,000-years of seabird dynamics in the Northwest Atlantic to determine the influences of Holocene-scale climatic oscillations on colony size. On Baccalieu Island (Newfoundland and Labrador, Canada) – where the world’s largest colony of Leach’s...

Warming in the land of the midnight sun: breeding birds may suffer greater heat stress at high- vs low-Arctic sites

Ryan O'Connor, Audrey Le Pogam, Kevin Young, Oliver Love, Christopher Cox, Gabrielle Roy, Francis Robitaille, Kyle Elliott, Anna Hargreaves, Emily Choy, Grant Gilchrist, Dominique Berteaux, Andrew Tam & François Vézina
Rising global temperatures are expected to increase reproductive costs for wildlife as greater thermoregulatory demands interfere with reproductive activities. However, predicting the temperatures at which reproductive performance is negatively impacted remains a significant hurdle. Using a thermoregulatory polygon approach, we derived a reproductive threshold temperature for an Arctic songbird–the snow bunting (Plectrophenax nivalis). We defined this threshold as the temperature at which individuals must reduce activity to suboptimal levels (i.e., < 4-times basal metabolic rate)...

Foraging on anthropogenic food predicts problem-solving skills in a seabird

Jessika Lamarre, Sukhinder Kaur Cheema, Gregory J. Robertson & David R. Wilson
Species and populations with greater cognitive performance are more successful at adapting to changing habitats. Accordingly, urban species and populations often outperform their rural counterparts on problem-solving tests. Paradoxically, urban foraging also might be detrimental to the development and integrity of animals’ brains because anthropogenic foods often lack essential nutrients such as the long-chain omega-3 fatty acids eicosapentaenoic acid (EPA) and docosahexaenoic acid (DHA), which are important for cognitive performance in mammals and possibly birds....

Variation and correlation in the timing of breeding of North Atlantic seabirds across multiple scales

Katharine Keogan, Francis Daunt, Sarah Wanless, Richard Phillips, David Alvarez, Tycho Anker-Nilssen, Robert Barrett, Claus Bech, Peter Becker, Per-Arvid Berglund, Sandra Bouwhuis, Zofia Burr, Olivier Chastel, Signe Christensen-Dalsgaard, Sébastien Descamps, Tony Diamond, Kyle Elliott, Kjell Einar Erikstad, Mike Harris, Jonas Hentati-Sundberg, Martin Heubeck, Magdalene Langset, Svein Lorentsen, Heather Major, Mark Mallory … & Stephen Kress
Timing of breeding, an important driver of fitness in many populations, is widely studied in the context of global change, yet despite considerable efforts to identify environmental drivers of seabird nesting phenology, for most populations we lack evidence of strong drivers. Here we adopt an alternative approach, examining the degree to which different populations positively covary in their annual phenology to infer whether phenological responses to environmental drivers are likely to be (i) shared across...

Grassland bird population declines at three Breeding Bird Survey spatial scales in contrast to a large native prairie

Nancy Mahony, Brenda Dale & David Miller
Grassland biomes in North America are threatened by agricultural intensification with implications for grassland associated bird populations via habitat loss, alteration, pesticide use and declining landscape heterogeneity. Despite decades of conservation concern, steep declines of North American grassland bird populations continue. Key to optimizing conservation effort is understanding how land-use practices, such as agriculture, across the annual cycle affects population status. Determining the relative influence of impacts on grassland bird declines is difficult given that...

Data and code from: Opposite, but insufficient, phenological responses to climate in two circumpolar seabirds: relative roles of phenotypic plasticity and selection

Shannon Whelan, Scott A. Hatch, Anthony J. Gaston, H. Grant Gilchrist & Kyle H. Elliott
The magnitude of climate change has been greatest in the Arctic, accelerating climate-induced shifts in phenology, but wildlife responses vary. Variation may be due to the relative importance of phenotypic plasticity or phenotypic selection. Here, we examine and contrast the environmental drivers of plasticity in breeding phenology of two circumpolar seabirds at their receding summer range limit using unique datasets of marked individuals covering 25 and 30 years. Based on prior knowledge of the local...

Data from: Local population collapse of Ross's and lesser snow geese driven by failing recruitment and diminished philopatry

Mitch Weegman, Ray Alisauskas, Dana Kellett, Qing Zhao, Scott Wilson & Tomas Telensky
We estimated survival and per capita production of young, as well as emigration and immigration, from 1997 to 2017 in Ross's goose Anser rossii and lesser snow goose Anser caerulescens caerulescens, which are sympatric species of migratory birds that nest in the central Canadian Arctic at one of the largest breeding colonies in North America. We formed age-structured integrated population models for each species that jointly analyzed live and dead encounter data as well as...

Active season body mass patterns of Little Brown Bats and Northern Myotis: Raw and fitted mass values, environmental conditions and inflection point estimates

Evan Balzer, Adam Grottoli, Lynne Burns & Hugh Broders
Animals are expected to adjust their behavioural patterns to improve fitness outcomes, such as fecundity or offspring survival. For long-lived hibernators, decisions made in each annual cycle may reflect considerations not just for concurrent survival and reproduction, but also the pressure to maximize overwinter survival and future reproductive success. We examined how these elements manifest themselves in the body mass variation patterns of North American northern latitude temperate bats, whose size and roosting habits present...

DNA metabarcoding sequence data for diet analysis of caribou

Greniqueca Mitchell, Paul Wilson, Bridget Redquest, Brent Patterson, Micheline Manseau & Linda Rutledge
Woodland caribou (Rangifer tarandus caribou) are threatened in Canada due to the drastic decline in population size caused primarily by human-induced landscape changes that decrease habitat and increase predation risk. Conservation efforts have largely focused on reducing predators and protecting critical habitat, whereas research on dietary niches and the role of potential food constraints in lichen-poor environments is limited. To improve our understanding of dietary niche variability, we used a next-generation sequencing approach with metabarcoding...

TCCON data from East Trout Lake, SK (CA), Release GGG2020.R0

D. Wunch, J. Mendonca, O. Colebatch, N. T. Allen, J.-F. Blavier, K. Kunz, S. Roche, J. Hedelius, G. Neufeld, S. Springett, D. Worthy, R. Kessler & K. Strong
The Total Carbon Column Observing Network (TCCON) is a network of ground-based Fourier Transform Spectrometers that record direct solar absorption spectra of the atmosphere in the near-infrared. From these spectra, accurate and precise column-averaged abundances of atmospheric constituents including CO2, CH4, N2O, HF, CO, H2O, and HDO, are retrieved. This is the GGG2020 data release of observations from the TCCON station at East Trout Lake, Canada

Registration Year

  • 2022

Resource Types

  • Dataset


  • Environment and Climate Change Canada
  • Environment Canada
  • McGill University
  • Queen's University
  • Memorial University of Newfoundland
  • Centre national de la recherche scientifique
  • University of Oviedo
  • Acadia University
  • Centre d'Ecologie Fonctionnelle et Evolutive
  • UK Centre for Ecology & Hydrology