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Radiocarbon dates of excavated eggshells were estimated using accelerator Mass Spectrometry (AMS) on bone, feather, and egg membrane tissues from the same ornithogenic layer as the eggshell and were completed at the Rafter Radiocarbon Laboratory and New Zealand (NZA), Beta Analytic, Inc. (Beta). All dates were corrected for the marine carbon reservoir effect and calibrated to calendar years before present (cal years BP) using a \u0394R of 750\u2009\u00b1\u200950 years and the MARINE13 calibration curve in Calib 7.0 (2\u03c3 range). \r\n\r\nThis data set indexes each individually analyzed eggshell sample with site (location), latitude, longitude, tissue used from radiocarbon dating, age of the sample, and nitrogen stable isotope values of individual amino acids. Details of the data set and all relevant methods are provided in Michelson et al. 2023 Limnol. Oceanogr. 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(2022) \"Amino acid nitrogen isotope values of modern and ancient Ad\u00e9lie penguin eggshells from the Ross Sea and Antarctic Peninsula regions\" U.S. Antarctic Program (USAP) Data Center. doi: https://doi.org/10.15784/601760.", "datePublished": "2022-01-13", "keywords": ["Adelie Penguin", "Amino Acids", "Antarctica", "Antarctic Peninsula", "Ross Sea", "Stable Isotope Analysis", "Trophic Position"], "creator": [{"@type": "Person", "additionalType": "geolink:Person", "name": "Patterson, William", "email": "", "affiliation": {"@type": "Organization", "name": "University of North Carolina Wilmington"}}, {"@type": "Person", "additionalType": "geolink:Person", "name": "McCarthy, Matthew", "email": null, "affiliation": {"@type": "Organization", "name": null}}, {"@type": "Person", "additionalType": "geolink:Person", "name": "Michelson, Chantel", "email": null, "affiliation": {"@type": "Organization", "name": null}}, {"@type": "Person", "additionalType": "geolink:Person", "name": "McMahon, Kelton", "email": "kelton_mcmahon@uri.edu", "affiliation": {"@type": "Organization", "name": null}}, {"@type": "Person", "additionalType": "geolink:Person", "name": "Polito, Michael", "email": "mpolito@lsu.edu", "affiliation": {"@type": "Organization", "name": "University of North Carolina Wilmington"}}, {"@type": "Person", "additionalType": "geolink:Person", "name": "Emslie, Steven", "email": "emslies@uncw.edu", "affiliation": {"@type": "Organization", "name": "Dept. of Biology and Marine Biology , University of North Carolina Wilmington, 601 S. 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Amino acid nitrogen isotope values of modern and ancient Adélie penguin eggshells from the Ross Sea and Antarctic Peninsula regions Data DOI: https://doi.org/10.15784/601760 Cite as Michelson, C., Emslie, S., McCarthy, M., McMahon, K., Patterson, W., Polito, M., & Wonder, M. (2022) "Amino acid nitrogen isotope values of modern and ancient Adélie penguin eggshells from the Ross Sea and Antarctic Peninsula regions" U.S. Antarctic Program (USAP) Data Center. doi: https://doi.org/10.15784/601760. 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 modern and excavated eggshell of Adélie penguins (Pygoscelis adelidae) from multiple sites around the Antarctic Peninsula and Ross Sea regions of Antarctica. Stable isotope analyses were conducted using a gas chromatograph coupled to a continuous flow stable isotope ratio mass spectrometer. Radiocarbon dates of excavated eggshells were estimated using accelerator Mass Spectrometry (AMS) on bone, feather, and egg membrane tissues from the same ornithogenic layer as the eggshell and were completed at the Rafter Radiocarbon Laboratory and New Zealand (NZA), Beta Analytic, Inc. (Beta). All dates were corrected for the marine carbon reservoir effect and calibrated to calendar years before present (cal years BP) using a ΔR of 750 ± 50 years and the MARINE13 calibration curve in Calib 7.0 (2σ range). This data set indexes each individually analyzed eggshell sample with site (location), latitude, longitude, tissue used from radiocarbon dating, age of the sample, and nitrogen stable isotope values of individual amino acids. Details of the data set and all relevant methods are provided in Michelson et al. 2023 Limnol. Oceanogr. DOI:10.1002/lno.12446 Creator(s): Michelson, Chantel; Polito, Michael; Wonder, Michael; Emslie, Steven; McCarthy, Matthew; Patterson, William; McMahon, Kelton Date Created: 2024-01-09 Repository: USAP-DC (current) License: Creative Commons Attribution Only v4.0 Generic [CC BY 4.0] Spatial Extent(s) West: -69.69, East: 170.21, South: -77.64, North: -61.59 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 Michelson, C. I., Polito, M. J., Wunder, M. B., Emslie, S. D., McCarthy, M. D., Patterson, W. P., & McMahon, K. W. (2023). Holocene climate change shifted Southern Ocean biogeochemical cycling and predator trophic dynamics. Limnology and Oceanography. 68, 2642–2653. (doi:10.1002/lno.12446) Keywords Adelie Penguin Amino Acids Antarctic Peninsula Antarctica Ross Sea Stable Isotope Analysis Trophic Position