(Table 1) Concentration of pollutants in hair of East Greenland polar bears (Ursus maritimus)


Hair sampled from 96 East Greenland polar bears (Ursus maritimus) over the periods 1892-1927 and 1988-2009 was analyzed for cortisol as a proxy to investigate temporal patterns of environmental stress. Cortisol concentration was independent of sex and age, and was found at significantly higher (p<0.001) concentrations in historical hair samples (1892-1927; n = 8) relative to recent ones (1988-2009; n = 88). In addition, there was a linear time trend in cortisol concentration of the recent samples (p< 0.01), with an annual decrease of 2.7%. The recent hair samples were also analyzed for major bioaccumulative, persistent organic pollutants (POPs). There were no obvious POP related time trends or correlations between hair cortisol and hair POP concentrations. Thus, polar bear hair appears to be a relatively poor indicator of the animal's general POP load in adipose tissue. However, further investigations are warranted to explore the reasons for the temporal decrease found in the bears' hair cortisol levels.

All concentrations per g hair, dry weight. Data extracted in the frame of a joint ICSTI/PANGAEA IPY effort, see http://doi.pangaea.de/10.1594/PANGAEA.150150

Supplement to: Bechshøft, Thea Ø; Rigét, Frank F; Sonne, Christian; Letcher, Robert J; Muir, Derek C G; Novak, M A; Henchey, E; Meyer, J S; Eulaers, I; Jaspers, Veerle LB; Eens, Marcel; Covaci, Adrian; Dietz, Rune (2012): Measuring environmental stress in East Greenland polar bears, 1892-1927 and 1988-2009: What does hair cortisol tell us? Environment International, 45, 15-21

DOI https://doi.org/10.1594/PANGAEA.807320
Related Identifier https://doi.org/10.1016/j.envint.2012.04.005
Metadata Access https://ws.pangaea.de/oai/provider?verb=GetRecord&metadataPrefix=datacite4&identifier=oai:pangaea.de:doi:10.1594/PANGAEA.807320
Creator Bechshøft, Thea Ø; Rigét, Frank F; Sonne, Christian ORCID logo; Letcher, Robert J; Muir, Derek C G ORCID logo; Novak, M A ORCID logo; Henchey, E; Meyer, J S ORCID logo; Eulaers, I ORCID logo; Jaspers, Veerle LB ORCID logo; Eens, Marcel; Covaci, Adrian ORCID logo; Dietz, Rune
Publisher PANGAEA
Publication Year 2012
Rights Creative Commons Attribution 3.0 Unported; https://creativecommons.org/licenses/by/3.0/
OpenAccess true
Resource Type Supplementary Dataset; Dataset
Format text/tab-separated-values
Size 44 data points
Discipline Earth System Research
Spatial Coverage (-20.000 LON, 74.000 LAT); East Greenland