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  • 2,4,6-Tribromophenol; Alanine, δ15N; Alanine, δ15N, standard deviation; Aspartic acid, δ15N; Aspartic acid, δ15N, standard deviation; Big_Break_Regional_Shoreline; California; CSIA; DATE/TIME; ecology; estuaries; Event label; Food web; Glutamic acid, δ15N; Glutamic acid, δ15N, standard deviation; Glycine, δ15N; Glycine, δ15N, standard deviation; HAND; Isoleucine, δ15N; Isoleucine, δ15N, standard deviation; LATITUDE; Leucine, δ15N; Leucine, δ15N, standard deviation; Liberty_Island; LONGITUDE; Lysine, δ15N; Lysine, δ15N, standard deviation; Mildred_Island; Phenylalanine, δ15N; Phenylalanine, δ15N, standard deviation; Plant functional type; Proline, δ15N; Sacramento-San Joaquin River Delta, California, U.S.A.; Sample ID; Sampling by hand; San Francisco Bay; Serine, δ15N; Serine, δ15N, standard deviation; Site; Species; Species, common name; Threonine, δ15N; Threonine, δ15N, standard deviation; trophic discrimination factor; trophic level; trophic position; Valine, δ15N; Valine, δ15N, standard deviation; δ15N, bulk sediment  (1)
  • Compound-specific stable isotope analysis  (1)
Document type
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  • 1
    facet.materialart.
    Unknown
    Amino acid nitrogen isotopic analysis of aquatic and terrestrial plants from an estuarine delta (2021)
    PANGAEA
    Details
    Publication Date: 2024-06-12
    Description: Aquatic and terrestrial plants were collected from the Sacramento-San Joaquin River Delta. Nitrogen isotope values of bulk plant tissue and individual amino acids were measured. Fifty-six specimens from thirty-nine native, introduced and invasive species were collected. Growth forms and habits include trees, shrubs, forbs, and grasses as well as floating, submerged, and emergent aquatic plants. Bulk tissues were processed and the nitrogen isotope values were measured following Tipple and Ehleringer, 2018 (Oecologia, 187, 1053-1075). Amino acids were hydrolyzed, derivatized, and the carbon isotope values of individual amino acids were measured following Vokhshoori and McCarthy, 2013 (PLoS ONE, 9, 6, e98087). The purpose of this study was to assess trophic discriminate factors at the base of estuarine systems with multiple primary producers. This study provides an authentic dataset of primary producers for trophic position assessments in estuarine and mixed terrestrial-marine source environments.
    Keywords: 2,4,6-Tribromophenol; Alanine, δ15N; Alanine, δ15N, standard deviation; Aspartic acid, δ15N; Aspartic acid, δ15N, standard deviation; Big_Break_Regional_Shoreline; California; CSIA; DATE/TIME; ecology; estuaries; Event label; Food web; Glutamic acid, δ15N; Glutamic acid, δ15N, standard deviation; Glycine, δ15N; Glycine, δ15N, standard deviation; HAND; Isoleucine, δ15N; Isoleucine, δ15N, standard deviation; LATITUDE; Leucine, δ15N; Leucine, δ15N, standard deviation; Liberty_Island; LONGITUDE; Lysine, δ15N; Lysine, δ15N, standard deviation; Mildred_Island; Phenylalanine, δ15N; Phenylalanine, δ15N, standard deviation; Plant functional type; Proline, δ15N; Sacramento-San Joaquin River Delta, California, U.S.A.; Sample ID; Sampling by hand; San Francisco Bay; Serine, δ15N; Serine, δ15N, standard deviation; Site; Species; Species, common name; Threonine, δ15N; Threonine, δ15N, standard deviation; trophic discrimination factor; trophic level; trophic position; Valine, δ15N; Valine, δ15N, standard deviation; δ15N, bulk sediment
    Type: Dataset
    Format: text/tab-separated-values, 1677 data points
    Location Call Number Limitation Availability
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    DATA PANGAEA
  • 2
    facet.materialart.
    Unknown
    Carbon and nitrogen isotope fractionation of amino acids in an avian marine predator, the gentoo penguin (Pygoscelis papua) (2015)
    John Wiley & Sons
    Details
    Publication Date: 2022-05-25
    Description: © The Author(s), 2015. This article is distributed under the terms of the Creative Commons Attribution License. The definitive version was published in Ecology and Evolution 5 (2015): 1278–1290, doi:10.1002/ece3.1437.
    Description: Compound-specific stable isotope analysis (CSIA) of amino acids (AA) has rapidly become a powerful tool in studies of food web architecture, resource use, and biogeochemical cycling. However, applications to avian ecology have been limited because no controlled studies have examined the patterns in AA isotope fractionation in birds. We conducted a controlled CSIA feeding experiment on an avian species, the gentoo penguin (Pygoscelis papua), to examine patterns in individual AA carbon and nitrogen stable isotope fractionation between diet (D) and consumer (C) (Δ13CC-D and Δ15NC-D, respectively). We found that essential AA δ13C values and source AA δ15N values in feathers showed minimal trophic fractionation between diet and consumer, providing independent but complimentary archival proxies for primary producers and nitrogen sources respectively, at the base of food webs supporting penguins. Variations in nonessential AA Δ13CC-D values reflected differences in macromolecule sources used for biosynthesis (e.g., protein vs. lipids) and provided a metric to assess resource utilization. The avian-specific nitrogen trophic discrimination factor (TDFGlu-Phe = 3.5 ± 0.4‰) that we calculated from the difference in trophic fractionation (Δ15NC-D) of glutamic acid and phenylalanine was significantly lower than the conventional literature value of 7.6‰. Trophic positions of five species of wild penguins calculated using a multi-TDFGlu-Phe equation with the avian-specific TDFGlu-Phe value from our experiment provided estimates that were more ecologically realistic than estimates using a single TDFGlu-Phe of 7.6‰ from the previous literature. Our results provide a quantitative, mechanistic framework for the use of CSIA in nonlethal, archival feathers to study the movement and foraging ecology of avian consumers.
    Description: This research was funded by National Science Foundation Office of Polar Programs [grants ANT-0125098, ANT-0739575] and the 2013 Antarctic Science Bursaries.
    Keywords: Amino acid ; Avian ; Compound-specific stable isotope analysis ; Diet ; Fractionation ; Penguin ; Trophic position
    Repository Name: Woods Hole Open Access Server
    Type: Article
    Format: application/pdf
    Format: application/msword
    Location Call Number Limitation Availability
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    PAPER (OA)
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