Santa Barbara Basin Bulk and Compound Specific Nitrogen Isotope Data Batista, F.C.; Ravelo, A.C.; Crusius, J.; Casso, M.A.; McCarthy, M.D. Batista, F.C. Ravelo, A.C. Crusius, J. Casso, M.A. McCarthy, M.D. earth science/paleoclimate/paleoceanography (delta 15N,glutamic acid|glutamine,null,per mil AIR,null,paleoceanography,null,gas chromatography|isotope ratio mass spectrometry,N,null) earth science/paleoclimate/paleoceanography (delta 15N,lysine,null,per mil AIR,null,paleoceanography,null,gas chromatography|isotope ratio mass spectrometry,N,null) earth science/paleoclimate/paleoceanography (delta 15N,phenylalanine,null,per mil AIR,null,paleoceanography,null,gas chromatography|isotope ratio mass spectrometry,N,null) earth science/paleoclimate/paleoceanography (delta 15N,serine,null,per mil AIR,null,paleoceanography,null,gas chromatography|isotope ratio mass spectrometry,N,null) earth science/paleoclimate/paleoceanography (delta 15N,threonine,null,per mil AIR,null,paleoceanography,null,gas chromatography|isotope ratio mass spectrometry,N,null) earth science/paleoclimate/paleoceanography (delta 15N,tyrosine,null,per mil AIR,null,paleoceanography,null,gas chromatography|isotope ratio mass spectrometry,N,null) earth science/paleoclimate/paleoceanography (carbon,null,null,weight percent,null,paleoceanography,null,elemental analysis|isotope ratio mass spectrometry,N,lipid fraction) earth science/paleoclimate/paleoceanography (carbon,amino acid,null,weight percent,null,paleoceanography,null,elemental analysis|isotope ratio mass spectrometry,N,total hydrolysable amino acid fraction) earth science/paleoclimate/paleoceanography (nitrogen,sediment,null,weight percent,null,paleoceanography,null,elemental analysis|isotope ratio mass spectrometry,N,bulk material) earth science/paleoclimate/paleoceanography (nitrogen,null,null,weight percent,null,paleoceanography,null,elemental analysis|isotope ratio mass spectrometry,N,acid insoluble fraction) earth science/paleoclimate/paleoceanography (glycine,null,null,mole percent,null,paleoceanography,null,gas chromatography|mass spectrometry,N,null) earth science/paleoclimate/paleoceanography (leucine,null,null,mole percent,null,paleoceanography,null,gas chromatography|mass spectrometry,N,null) earth science/paleoclimate/paleoceanography (serine,null,null,mole percent,null,paleoceanography,null,gas chromatography|mass spectrometry,N,null) earth science/paleoclimate/paleoceanography (delta 13C,sediment,null,per mil VPDB,null,paleoceanography,null,gas chromatography|isotope ratio mass spectrometry,N,bulk material) earth science/paleoclimate/paleoceanography (delta 15N,amino acid,null,per mil AIR,null,paleoceanography,null,gas chromatography|isotope ratio mass spectrometry,N,total hydrolysable amino acid; See original publication for parameter formulation) earth science/paleoclimate/paleoceanography (delta 15N,null,null,per mil AIR,null,paleoceanography,null,elemental analysis|isotope ratio mass spectrometry,N,bound fraction) earth science/paleoclimate/paleoceanography (alanine,null,null,mole percent,null,paleoceanography,null,gas chromatography|mass spectrometry,N,null) earth science/paleoclimate/paleoceanography (glutamic acid and glutamine,null,null,mole percent,null,paleoceanography,null,gas chromatography|mass spectrometry,N,null) earth science/paleoclimate/paleoceanography (delta 15N,leucine,null,per mil AIR,null,paleoceanography,null,gas chromatography|isotope ratio mass spectrometry,N,null) earth science/paleoclimate/paleoceanography (delta 13C,null,null,per mil VPDB,null,paleoceanography,null,elemental analysis|isotope ratio mass spectrometry,N,bound fraction) earth science/paleoclimate/paleoceanography (carbon,sediment,null,weight percent,null,paleoceanography,null,gas chromatography|isotope ratio mass spectrometry,N,bulk material) earth science/paleoclimate/paleoceanography (carbon,null,null,weight percent,null,paleoceanography,null,elemental analysis|isotope ratio mass spectrometry,N,bound fraction) earth science/paleoclimate/paleoceanography (collection water depth,null,null,meter,null,paleoceanography,null,null,N,null) earth science/paleoclimate/paleoceanography (lysine,null,null,mole percent,null,paleoceanography,null,gas chromatography|mass spectrometry,N,null) earth science/paleoclimate/paleoceanography (delta 13C,organic matter,null,per mil VPDB,null,paleoceanography,null,elemental analysis|isotope ratio mass spectrometry,N,organic carbon) earth science/paleoclimate/paleoceanography (delta 15N,sediment,null,per mil AIR,null,paleoceanography,null,elemental analysis|isotope ratio mass spectrometry,N,bulk fraction) earth science/paleoclimate/paleoceanography (organic carbon,null,null,weight percent,null,paleoceanography,null,elemental analysis|isotope ratio mass spectrometry,N,null) earth science/paleoclimate/paleoceanography (nitrogen,amino acid,null,weight percent,null,paleoceanography,null,elemental analysis|isotope ratio mass spectrometry,N,total hydrolysable amino acid fraction) earth science/paleoclimate/paleoceanography (nitrogen,null,null,weight percent,null,paleoceanography,null,elemental analysis|isotope ratio mass spectrometry,N,bound fraction) earth science/paleoclimate/paleoceanography (isoleucine,null,null,mole percent,null,paleoceanography,null,gas chromatography|mass spectrometry,N,null) earth science/paleoclimate/paleoceanography (phenylalanine,null,null,mole percent,null,paleoceanography,null,gas chromatography|mass spectrometry,N,null) earth science/paleoclimate/paleoceanography (delta 15N,alanine,null,per mil AIR,null,paleoceanography,null,gas chromatography|isotope ratio mass spectrometry,N,null) earth science/paleoclimate/paleoceanography (delta 15N,valine,null,per mil AIR,null,paleoceanography,null,gas chromatography|isotope ratio mass spectrometry,N,null) earth science/paleoclimate/paleoceanography (delta 13C,null,null,per mil VPDB,null,paleoceanography,null,elemental analysis|isotope ratio mass spectrometry,N,acid soluble fraction) earth science/paleoclimate/paleoceanography (delta 13C,null,null,per mil VPDB,null,paleoceanography,null,elemental analysis|isotope ratio mass spectrometry,N,acid insoluble fraction) earth science/paleoclimate/paleoceanography (depth,null,null,centimeter,null,paleoceanography,null,null,N,Multicore Depth) earth science/paleoclimate/paleoceanography (valine,null,null,mole percent,null,paleoceanography,null,gas chromatography|mass spectrometry,N,null) earth science/paleoclimate/paleoceanography (delta 15N,glycine,null,per mil AIR,null,paleoceanography,null,gas chromatography|isotope ratio mass spectrometry,N,null) earth science/paleoclimate/paleoceanography (delta 15N,sediment,null,per mil AIR,null,paleoceanography,null,gas chromatography|isotope ratio mass spectrometry,N,null) earth science/paleoclimate/paleoceanography (delta 13C,null,null,per mil VPDB,null,paleoceanography,null,elemental analysis|isotope ratio mass spectrometry,N,lipid fraction) earth science/paleoclimate/paleoceanography (delta 15N,amino acid,null,per mil AIR,null,paleoceanography,null,elemental analysis|isotope ratio mass spectrometry,N,total hydrolysable amino acid fraction) earth science/paleoclimate/paleoceanography (carbon,null,null,weight percent,null,paleoceanography,null,elemental analysis|isotope ratio mass spectrometry,N,acid soluble fraction) earth science/paleoclimate/paleoceanography (carbon,null,null,weight percent,null,paleoceanography,null,elemental analysis|isotope ratio mass spectrometry,N,acid insoluble fraction) earth science/paleoclimate/paleoceanography (proline,null,null,mole percent,null,paleoceanography,null,gas chromatography|mass spectrometry,N,null) earth science/paleoclimate/paleoceanography (threonine,null,null,mole percent,null,paleoceanography,null,gas chromatography|mass spectrometry,N,null) earth science/paleoclimate/paleoceanography (tyrosine,null,null,mole percent,null,paleoceanography,null,gas chromatography|mass spectrometry,N,null) earth science/paleoclimate/paleoceanography (delta 15N,asparagine|aspartic acid,null,per mil AIR,null,paleoceanography,null,gas chromatography|isotope ratio mass spectrometry,N,null) earth science/paleoclimate/paleoceanography (delta 15N,isoleucine,null,per mil AIR,null,paleoceanography,null,gas chromatography|isotope ratio mass spectrometry,N,null) earth science/paleoclimate/paleoceanography (delta 15N,proline,null,per mil AIR,null,paleoceanography,null,gas chromatography|isotope ratio mass spectrometry,N,null) earth science/paleoclimate/paleoceanography (delta 15N,null,null,per mil AIR,null,paleoceanography,null,elemental analysis|isotope ratio mass spectrometry,N,acid soluble fraction) earth science/paleoclimate/paleoceanography (delta 15N,null,null,per mil AIR,null,paleoceanography,null,elemental analysis|isotope ratio mass spectrometry,N,acid insoluble fraction) earth science/paleoclimate/paleoceanography (nitrogen,null,null,weight percent,null,paleoceanography,null,elemental analysis|isotope ratio mass spectrometry,N,acid soluble fraction) earth science/paleoclimate/paleocean (Santa Barbara Basin>LATITUDE 34.233333>LONGITUDE -120.016667) The nitrogen (N) isotopic composition (d15N) of bulk sedimentary N (d15Nbulk) is a common tool for studying past biogeochemical cycling in the paleoceanographic record. Empirical evidence suggests that natural fluctuations in the d15N of surface nutrient N are reflected in the d15N of exported planktonic biomass and in sedimentary d15Nbulk. However, d15Nbulk is an analysis of total combustible sedimentary N, and therefore also includes mixtures of N sources and/or selective removal or preservation of N-containing compounds. Compound-specific nitrogen isotope analyses of individual amino acids (d15NAA) are novel measurements with the potential to decouple d15N changes in nutrient N from trophic effects, two main processes that can influence d15Nbulk records. As a proof of concept study to examine how d15NAA can be applied in marine sedimentary systems, we compare the d15NAA signatures of surface and sinking POM sources with shallow surface sediments from the Santa Barbara Basin, a sub-oxic depositional environmental that exhibits excellent preservation of sedimentary organic matter. Our results demonstrate that d15NAA signatures of both planktonic biomass and sinking POM are well preserved in such surface sediments. However, we also observed an unexpected inverse correlation between d15N value of phenylalanine (d15NPhe; the best AA proxy for N isotopic value at the base of the food web) and calculated trophic position. We used a simple N isotope mass balance model to confirm that over long time scales, d15NPhe values should in fact be directly dependent on shifts in ecosystem trophic position. While this result may appear incongruent with current applications of d15NAA in food webs, it is consistent with expectations that paleoarchives will integrate N dynamics over much longer timescales. We therefore propose that for paleoceanographic applications, key d15NAA parameters are ecosystem trophic position, which determines relative partitioning of 15N into source AA versus trophic AA pools, and the integrated d15NAA of all common protein AA (d15NTHAA), which serves as a proxy for the d15N of nutrient N. Together, we suggest that these can provide a coupled picture of regime shifts in planktonic ecosystem structure, d15N at the base of food webs, and possibly additional information about nutrient dynamics. STUDY NOTES: Bulk and compound specific nitrogen isotopes in shallow surface sediments from Santa Barbara Basin Provided Keywords: Santa Barbara Basin, Nitrogen Isotopes, amino acids NCDC-Paleoclimatology https://www.ncdc.noaa.gov/data-access/paleoclimatology-data - Bauer Bruce Investigator : Batista, F.C. Investigator : Ravelo, A.C. Investigator : Crusius, J. Investigator : Casso, M.A. Investigator : McCarthy, M.D. 2017-06-12 ONLINE Files online, ASCII https://www.ncdc.noaa.gov/paleo/study/22233 https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/batista2014/batista2014-aa.txt https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/batista2014/batista2014-wtpct.txt https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/batista2014/batista2014-isofract.txt https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/batista2014/batista2014-d15n-aa.txt https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/batista2014/batista2014-aa.txt https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/batista2014/batista2014-wtpct.txt https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/batista2014/batista2014-isofract.txt https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/batista2014/batista2014-d15n-aa.txt English https://www.ncdc.noaa.gov/paleo/study/22233 https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/batista2014/batista2014-aa.txt https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/batista2014/batista2014-wtpct.txt https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/batista2014/batista2014-isofract.txt https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/batista2014/batista2014-d15n-aa.txt Batista, Fabian C., A. Christina Ravelo, John Crusius, Michael A. Casso, and Matthew D. McCarthy2014Compound specific amino acid d15N in marine sediments: A new approach for studies of the marine nitrogen cycleGeochimica et Cosmochimica Acta142553-56910.1016/j.gca.2014.08.002http://www.sciencedirect.com/science/article/pii/S0016703714004979 -120.016667 34.233333 -120.016667 34.233333