7 Works

Data from: Predator-rodent-plant interactions along a coast-inland gradient in Fennoscandian tundra

Lise Ruffino, Tarja Oksanen, Katrine S. Hoset, Maria Tuomi, Lauri Oksanen, Erkki Korpimäki, Amandine Bugli, Keith A. Hobson, Bernt Johansen & Aurelia Mäkynen
Spatial variation in the strength of trophic cascades in arctic tundra has been related to flows of subsidies across ecosystem boundaries. Here, we ask whether the input of marine subsidies in tundra systems would cause spatial variation in the strength of rodent-plant interactions between coastal areas, where predators have access to marine-derived resources, and non-subsidized inland areas of northern Fennoscandia. We present a detailed evaluation of predator-rodent-vegetation interactions along a coast-inland gradient, during the 2011...

Data from: Demographic and spatiotemporal patterns of avian influenza infection at the continental scale, and in relation to annual life cycle of a migratory host

Rodolfo Nallar, Zsuzsanna Papp, Tasha Epp, Frederick A. Leighton, Seth R. Swafford, Thomas J. DeLiberto, Robert J. Dusek, Hon S. Ip, Jeffrey Hall, Johannes Berhane, Samantha E. J. Gibbs, Catherine Soos & Yohannes Berhane
Since the spread of highly pathogenic avian influenza (HPAI) H5N1 in the eastern hemisphere, numerous surveillance programs and studies have been undertaken to detect the occurrence, distribution, or spread of avian influenza viruses (AIV) in wild bird populations worldwide. To identify demographic determinants and spatiotemporal patterns of AIV infection in long distance migratory waterfowl in North America, we fitted generalized linear models with binominal distribution to analyze results from 13,574 blue-winged teal (Anas discors, BWTE)...

Data from: Assessing costs of carrying geolocators using feather corticosterone in two species of aerial insectivore

Graham D. Fairhurst, Lisha L. Berzins, David W. Bradley, Andrew J. Laughlin, Andrea Romano, Maria Romano, Chiara Scandolara, Roberto Ambrosini, Russell D. Dawson, Peter O. Dunn, Keith A. Hobson, Felix Liechti, Tracy A. Marchant, D. Ryan Norris, Diego Rubolini, Nicola Saino, Caz M. Taylor, Linda A. Whittingham & Robert G. Clark
Despite benefits of using light-sensitive geolocators to track animal movements and describe patterns of migratory connectivity, concerns have been raised about negative effects of these devices, particularly in small species of aerial insectivore. Geolocators may act as handicaps that increase energetic expenditure, which could explain reported effects of geolocators on survival. We tested this ‘Energetic Expenditure Hypothesis’ in 12 populations of tree swallows (Tachycineta bicolor) and barn swallows (Hirundo rustica) from North America and Europe,...

Data from: Impacts of nest predators and weather on reproductive success and population limitation in a long-distance migratory songbird

Thomas W. Sherry, Scott Wilson, Sarah Hunter & Richard T. Holmes
Although avian nesting success is much studied, little is known about the relative importance of the factors that contribute to annual reproductive success and population limitation, especially for long-distance migratory songbird species. We combined a field experiment limiting access to nests by mammalian predators with modeling of long-term field data of American redstarts (Parulidae: Setophaga ruticilla) to assess the effects of multiple environmental variables on breeding success and population limitation. Experimental treatment (baffles placed around...

Data from: Differences in spatial synchrony and interspecific concordance inform guild-level population trends for aerial insectivorous birds

Nicole L. Michel, Adam C. Smith, Robert G. Clark, Christy A. Morrissey & Keith A. Hobson
Many animal species exhibit spatiotemporal synchrony in population fluctuations, which may provide crucial information about ecological processes driving population change. We examined spatial synchrony and concordance among population trajectories of five aerial insectivorous bird species: chimney swift Chaetura pelagica, purple martin Progne subis, barn swallow Hirundo rustica, tree swallow Tachycineta bicolor, and northern rough-winged swallow Stelgidopteryx serripennis. Aerial insectivores have undergone severe guild-wide declines that were considered more prevalent in northeastern North America. Here, we...

Data from: Large-scale biomonitoring of remote and threatened ecosystems via high-throughput sequencing

Joel F. Gibson, Shadi Shokralla, Colin Curry, Donald J. Baird, Wendy A. Monk, Ian King & Mehrdad Hajibabaei
Biodiversity metrics are critical for assessment and monitoring of ecosystems threatened by anthropogenic stressors. Existing sorting and identification methods are too expensive and labour-intensive to be scaled up to meet management needs. Alternately, a high-throughput DNA sequencing approach could be used to determine biodiversity metrics from bulk environmental samples collected as part of a large-scale biomonitoring program. Here we show that both morphological and DNA sequence-based analyses are suitable for recovery of individual taxonomic richness,...

Data from: Tracking the history and ecological changes of rising double-crested cormorant populations using pond sediments from islands in eastern Lake Ontario

Emily M. Stewart, Neal Michelutti, Sarah Shenstone-Harris, Christopher Grooms, Chip Weseloh, Linda E. Kimpe, Jules M. Blais & John P. Smol
In the Laurentian Great Lakes region, the double-crested cormorant (Phalacrocorax auritus) has seen a thousand-fold population increase in recent decades. These large colonies of birds now often conflict with socioeconomic interests, particularly due to perceived competition with fisheries and the destruction of terrestrial vegetation in nesting habitats. Here we use dated sediment cores from ponds on islands in eastern Lake Ontario that receive waste inputs from dense colonies of cormorants and ring-billed gulls (Larus delawarensis)...

Registration Year

  • 2015
    7

Resource Types

  • Dataset
    7

Affiliations

  • Environment Canada
    7
  • University of Saskatchewan
    3
  • University of Guelph
    2
  • Tulane University
    2
  • Canadian Food Inspection Agency
    1
  • The Arctic University of Norway
    1
  • University of Milan
    1
  • United States Department of Agriculture
    1
  • University of Milano-Bicocca
    1
  • University of Northern British Columbia
    1