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Amino acid nitrogen isotope values of penguins from the Antarctic Peninsula region 1930s to 2010s Data DOI: https://doi.org/10.15784/601232 Cite as McMahon, K., & Polito, M. (2019) "Amino acid nitrogen isotope values of penguins from the Antarctic Peninsula region 1930s to 2010s" U.S. Antarctic Program (USAP) Data Center. doi: https://doi.org/10.15784/601232. AMD - DIF Record(s) USAP-1443585_1 Abstract This data set contains measurements of nitrogen (δ15N) stable isotope values of twelve individual amino acids from breast feathers of gentoo penguins (Pygoscelis papua) and chinstrap penguins (Pygoscelis antarctica) collected from museum archives between the 1930s and 2010s. Stable isotope analyses were conducted using a gas chromatograph coupled to a continuous flow stable isotope ratio mass spectrometer. The data set also includes trophic positions of penguins calculated from individual amino acid δ15N values. The data set indexes each individual penguin with species, collection institution, catalog number, sex, locality, latitude, longitude, year of sample collection, nitrogen isotope ratios, and calculated trophic position. Details of the data set and all relevant methods are provided in McMahon et al. 2020 Proc Natl Acad Sci DOI: 10.1073/pnas.1913093116 Creator(s): McMahon, Kelton; Polito, Michael Date Created: 2019-12-17 Repository: USAP-DC (current) License: Creative Commons Attribution-NonCommercial v4.0 Generic [CC BY-NC 4.0] Spatial Extent(s) West: -63.56, East: -44.6, South: -64.58, North: -60.72 Temporal Extent(s) Start: 1930-01-01 - End: 2010-12-31 Award(s) NSF 1443386 NSF 1443424 NSF 1443585 NSF 1826712 Version: 1 Related Project(s) Collaborative Research: Investigating Holocene Shifts in the Diets and Paleohistory of Antarctic Krill Predators References McMahon, K. W., Michelson, C. I., Hart, T., McCarthy, M. D., Patterson, W. P., & Polito, M. J. (2019). Divergent trophic responses of sympatric penguin species to historic anthropogenic exploitation and recent climate change. Proceedings of the National Academy of Sciences Dec 2019, 201913093 (doi:10.1073/pnas.1913093116) Keywords Amino Acids Antarctic Peninsula Antarctica Antarctica Biota Biota Isotope Data Nitrogen Isotopes Oceans Penguin Southern Ocean Stable Isotope Analysis