Change search
Refine search result
1 - 1 of 1
CiteExportLink to result list
Permanent link
Cite
Citation style
  • apa
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Other style
More styles
Language
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Other locale
More languages
Output format
  • html
  • text
  • asciidoc
  • rtf
Rows per page
  • 5
  • 10
  • 20
  • 50
  • 100
  • 250
Sort
  • Standard (Relevance)
  • Author A-Ö
  • Author Ö-A
  • Title A-Ö
  • Title Ö-A
  • Publication type A-Ö
  • Publication type Ö-A
  • Issued (Oldest first)
  • Issued (Newest first)
  • Created (Oldest first)
  • Created (Newest first)
  • Last updated (Oldest first)
  • Last updated (Newest first)
  • Disputation date (earliest first)
  • Disputation date (latest first)
  • Standard (Relevance)
  • Author A-Ö
  • Author Ö-A
  • Title A-Ö
  • Title Ö-A
  • Publication type A-Ö
  • Publication type Ö-A
  • Issued (Oldest first)
  • Issued (Newest first)
  • Created (Oldest first)
  • Created (Newest first)
  • Last updated (Oldest first)
  • Last updated (Newest first)
  • Disputation date (earliest first)
  • Disputation date (latest first)
Select
The maximal number of hits you can export is 250. When you want to export more records please use the Create feeds function.
  • 1.
    Fuchs, Boris
    et al.
    Department of Forestry and Wildlife Management, Inland Norway University of Applied Sciences, Campus Evenstad, 2480 Koppang, Norway.
    Joly, Kyle
    National Park Service, Gates of the Arctic National Park and Preserve, 99709 Fairbanks, Alaska, USA.
    Hilderbrand, Grant V.
    National Park Service, Alaska Regional Office, 99501 Anchorage, Alaska, USA.
    Evans, Alina L.
    Department of Forestry and Wildlife Management, Inland Norway University of Applied Sciences, Campus Evenstad, 2480 Koppang, Norway.
    Rodushkin, Ilia
    Luleå University of Technology, Department of Civil, Environmental and Natural Resources Engineering, Geosciences and Environmental Engineering. ALS Scandinavia AB, 97187, Luleå, Sweden.
    Mangipane, Lindsey S.
    U.S. Fish and Wildlife Service, Marine Mammals Management, 99503 Anchorage, Alaska, USA.
    Mangipane, Buck A.
    Lake Clark National Park and Preserve, National Park Service, 99501 Anchorage, Alaska, USA.
    Gustine, David D.
    U.S. Fish and Wildlife Service, Marine Mammals Management, 99503 Anchorage, Alaska, USA.
    Zedrosser, Andreas
    Department of Natural Science and Environmental Health, University of South-Eastern Norway, 3800 Boe in Telemark, Norway; Institute for Wildlife Biology and Game Management, University of Natural Resources and Life Sciences, 1180 Vienna, Austria.
    Brown, Ludovick
    Departement de biologie, Universite de Sherbrooke, J1K 2R1 Sherbrooke, Quebec, Canada.
    Arnemo, Jon M.
    Department of Forestry and Wildlife Management, Inland Norway University of Applied Sciences, Campus Evenstad, 2480 Koppang, Norway; Department of Wildlife, Fish and Environmental Studies, Swedish University of Agricultural Sciences, 901 83, Umeå, Sweden.
    Toxic elements in arctic and sub-arctic brown bears: Blood concentrations of As, Cd, Hg and Pb in relation to diet, age, and human footprint2023In: Environmental Research, ISSN 0013-9351, E-ISSN 1096-0953, Vol. 229, article id 115952Article in journal (Refereed)
    Abstract [en]

    Contamination with arsenic (As), cadmium (Cd), mercury (Hg) and lead (Pb) is a global concern impairing resilience of organisms and ecosystems. Proximity to emission sources increases exposure risk but remoteness does not alleviate it. These toxic elements are transported in atmospheric and oceanic pathways and accumulate in organisms. Mercury accumulates in higher trophic levels. Brown bears (Ursus arctos), which often live in remote areas, are long-lived omnivores, feeding on salmon (Oncorhynchus spp.) and berries (Vaccinium spp.), resources also consumed by humans.

    We measured blood concentrations of As, Cd, Hg and Pb in bears (n = 72) four years and older in Scandinavia and three national parks in Alaska, USA (Lake Clark, Katmai and Gates of the Arctic) using high-resolution, inductively-coupled plasma sector field mass spectrometry. Age and sex of the bears, as well as the typical population level diet was associated with blood element concentrations using generalized linear regression models.

    Alaskan bears consuming salmon had higher Hg blood concentrations compared to Scandinavian bears feeding on berries, ants (Formica spp.) and moose (Alces). Cadmium and Pb blood concentrations were higher in Scandinavian bears than in Alaskan bears. Bears using marine food sources, in addition to salmon in Katmai, had higher As blood concentrations than bears in Scandinavia. Blood concentrations of Cd and Pb, as well as for As in female bears increased with age. Arsenic in males and Hg concentrations decreased with age.

    We detected elevated levels of toxic elements in bears from landscapes that are among the most pristine on the planet. Sources are unknown but anthropogenic emissions are most likely involved. All study areas face upcoming change: Increasing tourism and mining in Alaska and more intensive forestry in Scandinavia, combined with global climate change in both regions. Baseline contaminant concentrations as presented here are important knowledge in our changing world.

    Download full text (pdf)
    fulltext
1 - 1 of 1
CiteExportLink to result list
Permanent link
Cite
Citation style
  • apa
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Other style
More styles
Language
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Other locale
More languages
Output format
  • html
  • text
  • asciidoc
  • rtf