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Appendix S1. Supplemental text covering methods of POP analysis, quality control, sample oxidation testing, and simulation exercises; results on the confounding influence of oxidation and simulation modeling; discussion regarding East Greenland hunting records, and evidence of dietary influence on fatty acid carbon isotopes.

Table S1. Adipose FA profiles of East Greenland polar bears collected from 1984 to 2011.

Table S2. Sample sizes for East Greenland polar bears collected from 1984 to 2011.

Figure S1. Percentage of 22:6n-3 in East Greenland polar bear adipose FA signatures, by subjective oxidation class.

Figure S2. Percentage of selected dietary fatty acids in the blubber of polar bear prey from Greenland and neighboring regions.

Figure S3. Influence on East Greenland polar bear QFASA-generated diet estimates of spatiotemporal variation in the prey library.

Figure S4. Proportional contribution of the prey species to East Greenland polar bear yearly mean and individual diets from fall-winters of 1986–2009.

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