PMID- 27794227
OWN - NLM
STAT- MEDLINE
DCOM- 20180605
LR  - 20181202
IS  - 1879-1026 (Electronic)
IS  - 0048-9697 (Linking)
VI  - 576
DP  - 2017 Jan 15
TI  - Sea ice-associated decline in body condition leads to increased concentrations of 
      lipophilic pollutants in polar bears (Ursus maritimus) from Svalbard, Norway.
PG  - 409-419
LID - S0048-9697(16)32322-1 [pii]
LID - 10.1016/j.scitotenv.2016.10.132 [doi]
AB  - Global climate changes are magnified in the Arctic and are having an especially 
      dramatic effect on the spatial and temporal distribution and the thickness traits 
      of sea ice. Decline of Arctic sea ice may lead to qualitative and/or quantitative 
      changes in diet and reduced body condition (i.e. adipose tissue stores) of 
      ice-associated apex predators such as polar bears (Ursus maritimus). This may 
      further affect their tissue concentrations of lipophilic pollutants. We 
      determined how variations in adipose tissue stores associated to both breeding 
      status and spatial changes in sea ice conditions and diet influence 
      concentrations and biotransformation of lipophilic persistent organic pollutants 
      (POPs). We collected 112 blood and fat samples from female polar bears (Ursus 
      maritimus) of different breeding status (alone, with cubs of the year, or with 
      yearlings) during two seasons (April and September) in 2012 and 2013 at three 
      locations of Svalbard, Norway, with contrasted sea ice conditions. We inferred 
      diet from nitrogen and carbon stable isotope ratios in red blood cells and fatty 
      acid composition in adipose tissue. Relative to diet, body condition, which was 
      negatively related to sea ice extent at both temporal and spatial scales, was the 
      most important predictor for concentrations of POPs in plasma and fat, whereas 
      diet showed a minor influence. Additionally, fatter females were more efficient 
      at biotransforming PCBs than were leaner ones. Breeding status influenced the 
      concentrations of less lipophilic compounds such as beta-hexachlorocyclohexane, 
      which were lower in females with yearlings, probably due to excretion into milk 
      and subsequent offloading to young. In conclusion, our results indicate that 
      declining sea ice indirectly leads to increased concentrations of lipophilic 
      pollutants in polar bears mediated through reduced feeding opportunities and 
      declining body condition rather than changes in diet composition.
CI  - Copyright (c) 2016 Elsevier B.V. All rights reserved.
FAU - Tartu, Sabrina
AU  - Tartu S
AD  - Norwegian Polar Institute, Fram Centre, Tromso, Norway. Electronic address: 
      tartu.sabrina@gmail.com.
FAU - Bourgeon, Sophie
AU  - Bourgeon S
AD  - Norwegian Polar Institute, Fram Centre, Tromso, Norway; UiT-The Arctic University 
      of Norway, Department of Arctic and Marine Biology, Tromso, Norway.
FAU - Aars, Jon
AU  - Aars J
AD  - Norwegian Polar Institute, Fram Centre, Tromso, Norway.
FAU - Andersen, Magnus
AU  - Andersen M
AD  - Norwegian Polar Institute, Fram Centre, Tromso, Norway.
FAU - Polder, Anuschka
AU  - Polder A
AD  - Norwegian University of Life Science, Campus Adamstua, Oslo, Norway; York 
      University, Faculty of Environmental Studies, Toronto, ON, Canada.
FAU - Thiemann, Gregory W
AU  - Thiemann GW
AD  - York University, Faculty of Environmental Studies, Toronto, ON, Canada.
FAU - Welker, Jeffrey M
AU  - Welker JM
AD  - University of Alaska Anchorage, Department of Biological Sciences, Anchorage, AK, 
      USA; University Center in Svalbard, Longyearbyen, Svalbard, Norway.
FAU - Routti, Heli
AU  - Routti H
AD  - Norwegian Polar Institute, Fram Centre, Tromso, Norway.
LA  - eng
PT  - Journal Article
DEP - 20161026
PL  - Netherlands
TA  - Sci Total Environ
JT  - The Science of the total environment
JID - 0330500
RN  - 0 (Environmental Pollutants)
SB  - IM
EIN - Sci Total Environ. 2017 Oct 1;595:818. PMID: 28411564
MH  - Adipose Tissue/chemistry
MH  - Animals
MH  - Arctic Regions
MH  - Environmental Pollutants/*analysis
MH  - Female
MH  - *Global Warming
MH  - *Ice Cover
MH  - Plasma/chemistry
MH  - Svalbard
MH  - *Ursidae
OTO - NOTNLM
OT  - Arctic
OT  - Biotransformation
OT  - Energy stores
OT  - Global warming
OT  - Legacy POPs
OT  - Maternal transfer
EDAT- 2016/10/30 06:00
MHDA- 2018/06/06 06:00
CRDT- 2016/10/30 06:00
PHST- 2016/07/20 00:00 [received]
PHST- 2016/10/18 00:00 [revised]
PHST- 2016/10/18 00:00 [accepted]
PHST- 2016/10/30 06:00 [pubmed]
PHST- 2018/06/06 06:00 [medline]
PHST- 2016/10/30 06:00 [entrez]
AID - S0048-9697(16)32322-1 [pii]
AID - 10.1016/j.scitotenv.2016.10.132 [doi]
PST - ppublish
SO  - Sci Total Environ. 2017 Jan 15;576:409-419. doi: 10.1016/j.scitotenv.2016.10.132. 
      Epub 2016 Oct 26.