# Central California Margin Bulk Isotope Data in Deep-Sea Coral Amino Acids over the last 200 Years #----------------------------------------------------------------------- # World Data Service for Paleoclimatology, Boulder # and # NOAA Paleoclimatology Program #----------------------------------------------------------------------- # Template Version 4.0 # Encoding: UTF-8 # NOTE: Please cite original publication, NOAA Landing Page URL, dataset and publication DOIs (where available), and date accessed when using downloaded data. # If there is no publication information, please cite investigator, study title, NOAA Landing Page URL, and date accessed. # # Description/Documentation lines begin with '#' followed by a space # Data lines have no '#' # # NOAA_Landing_Page: https://www.ncei.noaa.gov/access/paleo-search/study/38859 # Landing_Page_Description: NOAA Landing Page of this file's parent study, which includes all study metadata. # # Study_Level_JSON_Metadata: https://www.ncei.noaa.gov/pub/data/metadata/published/paleo/json/noaa-coral-38859.json # Study_Level_JSON_Description: JSON metadata of this data file's parent study, which includes all study metadata. # # Data_Type: Corals and Sclerosponges # # Dataset_DOI: # # Science_Keywords: #--------------------------------------- # Resource_Links # # Data_Download_Resource: https://www.ncei.noaa.gov/pub/data/paleo/coral/east_pacific/guilderson2024/guilderson2024-mol.txt # Data_Download_Description: NOAA Template File; D621 and D639 Mol% Data # #--------------------------------------- # Contribution_Date # Date: 2024-01-04 #--------------------------------------- # File_Last_Modified_Date # Date: 2024-01-04 #--------------------------------------- # Title # Study_Name: Central California Margin Bulk Isotope Data in Deep-Sea Coral Amino Acids over the last 200 Years #--------------------------------------- # Investigators # Investigators: Guilderson, Thomas P (https://orcid.org/0000-0001-9371-7059); McCarthy, Matthew D #--------------------------------------- # Description_Notes_and_Keywords # Description: Water depth: -1200 to -1300 m #--------------------------------------- # Publication # Authors: Pugsley, Genevieve; Guilderson, Thomas P.; Shen, Yuan; Glynn, Danielle; McCarthy, Matthew D # Published_Date_or_Year: 2024 # Published_Title: Deep-sea coral amino acid isotopes reveal climate-driven decadal-scale planktic ecosystem fluctuations on the central California margin. # Journal_Name: Limnology and Oceanography # Volume: submitted # Edition: # Issue: # Pages: # Report_Number: # DOI: # Online_Resource: # Full_Citation: # Abstract: Decadal-scale climate variability influences marine biogeochemistry on the central California margin, driving fluctuations in nutrient availability, primary productivity and plankton community structure. Paleoceanographic reconstruction using d15N and d13C proxies can provide new insight beyond the instrumental record; however only a few sedimentary records from anoxic basins resolve decadal-scale ecosystem fluctuations, and multiple possible drivers of variability complicate interpretation of bulk d15N and d13C records. We addressed these challenges by applying bulk and compound-specific amino acid d15N and d13C analysis to two deep-sea bamboo coral archives with sub-decadal resolution collected from the central California margin, creating a record of past biogeochemical change spanning c. 1815 to present. Comparison of bamboo coral amino acid d15N and d13C results with sediment trap data and marine organic matter end members indicates that bamboo coral likely feed directly on exported sinking particles  . The sub-decadally resolved bulk d15N and d13C records suggest long-term ecosystem stability since the pre-industrial period, punctuated by multidecadal-scale fluctuations that coincide with local and basin-scale oceanographic variability during the 20th century. Compound-specific isotopes of amino acids reveal that bulk d13C variability is responsive to shifts in d13C of primary production, whereas bulk d15N variability is driven primarily by shifts in trophic position. In our record, high (low) coral trophic position and low (high) d13C of primary production occurred during negative (positive) phases of the Pacific Decadal Oscillation. These results imply low primary productivity occurred during periods of high nitrate availability, meaning primary production was decoupled from macronutrient supply. We hypothesize that physical mixing or precipitation-mediated changes in iron availability may link climate variability to phytoplankton productivity and ecosystem trophic structure at our study site. Understanding such relationships between climate forcing and ecosystem response is crucial for predicting future change under shifting climate regimes in California. #--------------------------------------- # Funding_Agency # Funding_Agency_Name: US National Science Foundation # Grant: OCE 1635527 #--------------------------------------- # Site_Information # Site_Name: Sur Ridge # Location: Eastern Pacific Ocean # Northernmost_Latitude: 36.4 # Southernmost_Latitude: 36.4 # Easternmost_Longitude: -122.3 # Westernmost_Longitude: -122.3 # Elevation_m: -1250 #--------------------------------------- # Data_Collection # Collection_Name: D621 and D639 Mol% Guilderson2024 # First_Year: # Last_Year: # Time_Unit: # Core_Length_m: # Parameter_Keywords: chemistry # Notes: Two samples collected via Doc Ricketts (ROV) D621 #1 and D639 #1 #--------------------------------------- # Chronology_Information # Chronology: # Radiocarbon values reflects that of recently exported surface particulate organic carbon. To estimate CE years, the coral 14C was visually aligned to a putative California Current surface water "reference chronology" based on otoliths presented in Haltuch et al., (2014). # Coral Identification Sample Identification # Sample ID as raidal distance (mm) from outer edge of node # CAMS# AMS Laboratory code # Fmodern Fraction modern (Stuiver and Polach, 1977), sensu strictu, which is equivalent to F14C (Reimer et al., 2004) # ±Fm One sigma sd of Fmodern # Coral ID Sample # CAMS# Fmodern ±F14C # D621_1B 8 171029 1.02591159264312 3.54070562966767E-03 # D621_1B 13 182916 1.0247 0.0029 # D621_1B 18 171030 1.04262715071744 3.28282621864074E-03 # D621_1B 24 182906 0.9012 0.0024 # D621_1B 28 171031 0.900968750616661 3.05872476580677E-03 # D621_1B 38 171032 0.909125214479649 3.19685490311176E-03 # D621_1B 48 171033 0.905891628600976 3.52662614643443E-03 # D639_1C 9 171034 1.05129753836973 3.88915664371195E-03 # D639_1C 18 182907 0.9069 0.0026 # D639_1C 21 173006 0.9126 0.0028 # D639_1C 33 173007 0.9048 0.0021 # D639_1C 45 173008 0.9008 0.0025 # D639_1C 57 173009 0.9012 0.0027 # #--------------------------------------- # Variables # PaST_Thesaurus_Download_Resource: https://www.ncei.noaa.gov/access/paleo-search/skos/past-thesaurus.rdf # PaST_Thesaurus_Download_Description: Paleoenvironmental Standard Terms (PaST) Thesaurus terms, definitions, and relationships in SKOS format. # # Data variables follow that are preceded by "##" in columns one and two. # Variables list, one per line, shortname-tab-var components: what, material, error, units, seasonality, data type, detail, method, C or N for Character or Numeric data) # ## Coral_ID sample identification,Isidella sp.,,,,corals and sclerosponges,,,C,Sample Identification information: Dive; Specimen #; sample # ## Sample# sample identification,,,,,corals and sclerosponges,,,N,sample number- sequential from outer edge of node; computerized micromill ## Mol%_Ala Alanine,Isidella sp.,,mole percent,,corals and sclerosponges,,gas chromatography; mass spectrometry,N,precision: 5%; Mole Percent relative ## Mol%_Gly Glycine,Isidella sp.,,mole percent,,corals and sclerosponges,,gas chromatography; mass spectrometry,N,precision: 5%; Mole Percent relative ## Mol%_Thr Threonine,Isidella sp.,,mole percent,,corals and sclerosponges,,gas chromatography; mass spectrometry,N,precision: 5%; Mole Percent relative ## Mol%_Ser Serine,Isidella sp.,,mole percent,,corals and sclerosponges,,gas chromatography; mass spectrometry,N,precision: 5%; Mole Percent relative ## Mol%_Val Valine,Isidella sp.,,mole percent,,corals and sclerosponges,,gas chromatography; mass spectrometry,N,precision: 5%; Mole Percent relative ## Mol%_Leu Leucine,Isidella sp.,,mole percent,,corals and sclerosponges,,gas chromatography; mass spectrometry,N,precision: 5%; Mole Percent relative ## Mol%_Ile Isoleucine,Isidella sp.,,mole percent,,corals and sclerosponges,,gas chromatography; mass spectrometry,N,precision: 5%; Mole Percent relative ## Mol%_Pro Proline,Isidella sp.,,mole percent,,corals and sclerosponges,,gas chromatography; mass spectrometry,N,precision: 5%; Mole Percent relative ## Mol%_Asx aspartic acid and asparagine,Isidella sp.,,mole percent,,corals and sclerosponges,,gas chromatography; mass spectrometry,N,precision: 5%; Mole Percent relative ## Mol%_Glx glutamic Acid and glutamine,Isidella sp.,,mole percent,,corals and sclerosponges,,gas chromatography; mass spectrometry,N,precision: 5%; Mole Percent relative ## Mol%_Phe Phenylalanine,Isidella sp.,,mole percent,,corals and sclerosponges,,gas chromatography; mass spectrometry,N,precision: 5%; Mole Percent relative ## Mol%_Lys Lysine,Isidella sp.,,mole percent,,corals and sclerosponges,,gas chromatography; mass spectrometry,N,precision: 5%; Mole Percent relative #------------------------ # Data: # Data lines follow (have no #) # Data line format - tab-delimited text, variable short name as header # Missing_Values: na Coral_ID Sample# Mol%_Ala Mol%_Gly Mol%_Thr Mol%_Ser Mol%_Val Mol%_Leu Mol%_Ile Mol%_Pro Mol%_Asx Mol%_Glx Mol%_Phe Mol%_Lys D621_1B 1 10.9 32 6.3 6 4.5 2.5 2.9 5 11 10.6 1.7 6.7 D621_1B 4 10.8 36.7 4.7 4.8 4.7 1.7 3.1 4.90 11.2 8.4 1.6 7.4 D621_1B 9 11.1 31.8 6.1 5.8 4.7 2.5 3.1 5.1 11.6 9.9 1.8 6.5 D621_1B 15 11 30.6 6 5.8 4.5 2.6 3.1 5 12.4 10.1 2.1 6.6 D621_1B 20 11.1 37.6 4.4 4.9 4.7 1.8 3.3 4.8 11 8.1 1.8 6.6 D621_1B 22 11.7 31.8 5.7 5.5 4.5 2.5 2.9 4.6 12.1 10.1 1.9 6.7 D621_1B 26 10.9 37.9 4.7 4.8 4.5 1.8 3.1 4.9 11.3 8.2 1.5 6.4 D621_1B 30 12.1 39.9 4.8 4.9 5 1.6 3.1 4.9 11.5 8.2 1 3.1 D621_1B 34 5.9 32.2 4.7 5.5 3.5 1.9 3.3 5.8 14.6 11.2 2.2 9.1 D621_1B 38 11 37.6 4.6 4.6 4.6 1.8 3.1 4.8 11 8.4 1.6 7 D621_1B 41 11.3 37.2 4.6 4.7 5.1 1.8 3.6 4.8 11.1 8 1.6 6.3 D621_1B 45 11.4 28.2 6.6 6.3 5.2 2.8 3.6 5.1 11.9 9.6 2.2 7 D621_1B 56 11.3 27.9 6.4 6.1 5.1 3 3.6 5.4 12.2 9.6 2.4 6.9 D639_1C 4 9.2 32.7 6.3 5.8 4.4 2.4 2.7 5.1 11.5 11 1.8 7.1 D639_1C 7 11.2 34.9 6.2 5.2 5.2 2.3 3.1 4.6 10.5 9.4 1.6 6 D639_1C 12 9.1 32.6 6.1 5.2 4.4 2.3 2.8 5.2 11.7 11.4 1.9 7.4 D639_1C 14 11.1 34 6.5 5 5.6 2.4 3.3 4.6 10.5 8.6 1.9 6.4 D639_1C 16 11.6 32.9 7.5 6 6.2 2.6 3.8 3.8 9.3 7 1.9 7.4 D639_1C 25 11 33.7 6.2 5.6 5.3 2.2 3.1 4.2 10.2 9.9 1.8 7 D639_1C 29 10.9 34.6 6 5.2 5 2.3 3 5.3 10.7 9.2 1.5 6.2 D639_1C 32 9.5 35.1 5 5 5.2 1.9 3.6 6.1 11.2 8.3 1.8 7 D639_1C 39 12 34.7 6.6 5.4 5.5 2.3 3.3 4.1 9.1 8.5 1.8 6.6 D639_1C 46 10.2 32.1 7.7 6.7 5.7 2.7 3.7 4.1 10.8 6.4 2.2 7.8 D639_1C 53 9.2 34.9 5 5.1 5.1 1.8 3.6 4.8 12.3 9.2 1.6 7.4 D639_1C 56 10.8 34.4 6.2 5.2 4.7 2.3 2.9 4.4 11.6 9.7 1.8 6.1 D639_1C 59 9.8 34 6.3 5.4 4.7 2.3 3.2 4.6 11.5 9.8 1.8 6.7 D639_1C 61 9.6 33.5 6.5 5.8 4.7 2.4 3.1 4.5 10.7 9.8 2 7.6 D639_1C 65 10.8 34.2 6.3 5.3 4.8 2.3 3 4.3 11.5 9.7 1.7 6.1