5 Works

Data from: Recent Warming, Rather than Industrial Emissions of Bioavailable Nutrients, is the Dominant Driver of Lake Primary Production Shifts across the Athabasca Oil Sands Region

Jamie C. Summers, Joshua Kurek, Jane L. Kirk, Derek CG. Muir, Xiaowa Wang, Johan A. Wiklund, Colin A. Cooke, Marlene S. Evans, John P. Smol & Derek C. G. Muir
Freshwaters in the Athabasca Oil Sands Region (AOSR) are vulnerable to the atmospheric emissions and land disturbances caused by the local oil sands industry; however, they are also affected by climate change. Recent observations of increases in aquatic primary production near the main development area have prompted questions about the principal drivers of these limnological changes. Is the enhanced primary production due to deposition of nutrients (nitrogen and phosphorus) from local industry or from recent...

Data from: Unpredictable perturbation reduces breeding propensity regardless of pre-laying reproductive readiness in a partial capital breeder

Pierre Legagneux, Holly L. Hennin, H. Grant Gilchrist, Tony D. Williams, Oliver P. Love & Joël Bêty
Theoretically, individuals of migratory species should optimize reproductive investment based on a combination of timing of and body condition at arrival on the breeding grounds. A minimum threshold body mass is required to initiate reproduction, and the timing of reaching this threshold is critical because of the trade-off between delaying breeding to gain in condition against the declining value of offspring with later reproductive timing. Long-lived species have the flexibility within their life history to...

Data from: Linking isotopes and panmixia: high within-colony variation in feather δ2H, δ13C, and δ15N across the range of the American white pelican

Matthew W. Reudink, Christopher J. Kyle, Ann E. McKellar, Christopher M. Somers, Robyn L.F. Reudink, T. Kurt Kyser, Samantha E. Franks & Joseph J. Nocera
Complete panmixia across the entire range of a species is a relatively rare phenomenon; however, this pattern may be found in species that have limited philopatry and frequent dispersal. American white pelicans (Pelecanus erythrorhyncos) provide a unique opportunity to examine the role of long-distance dispersal in facilitating gene flow in a species recently reported as panmictic across its broad breeding range. This species is also undergoing a range expansion, with new colonies arising hundreds of...

Data from: Latitudinal variation in ecological opportunity and intraspecific competition indicates differences in niche variability and diet specialization of Arctic marine predators

David J. Yurkowski, Steve Ferguson, Emily S. Choy, Lisa L. Loseto, Tanya M. Brown, Derek C. G. Muir, Christina A. D. Semeniuk & Aaron T. Fisk
Individual specialization (IS), where individuals within populations irrespective of age, sex, and body size are either specialized or generalized in terms of resource use, has implications on ecological niches and food web structure. Niche size and degree of IS of near-top trophic-level marine predators have been little studied in polar regions or with latitude. We quantified the large-scale latitudinal variation of population- and individual-level niche size and IS in ringed seals (Pusa hispida) and beluga...

Data from: Identifying management actions to increase foraging opportunities for shorebirds at semi-intensive shrimp farms

Juan G. Navedo, Guillermo Fernández, Nelson Valdivia, Mark C. Drever & Jose A. Masero
The expansion of aquaculture has resulted in widespread habitat conversion throughout the world. Identifying beneficial management measures may dramatically reduce negative impacts of aquaculture for migratory birds. We studied how densities of foraging shorebirds varied at ponds within a semi-intensive shrimp aquaculture farm on the north-western coast of Mexico, as related to timing of harvest and tidal cycles. Further, we estimated the total daily available area for each shorebird species throughout two entire harvesting seasons...

Registration Year

  • 2016
    5

Resource Types

  • Dataset
    5

Affiliations

  • Environment Canada
    5
  • University of Windsor
    2
  • Queen's University
    2
  • University of Alberta
    1
  • University of Extremadura
    1
  • National Autonomous University of Mexico
    1
  • Simon Fraser University
    1
  • University Austral de Chile
    1
  • University of Manitoba
    1
  • Fisheries and Oceans Canada
    1