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  • Alanine, δ13C; Alanine, δ13C, standard deviation; Aspartic acid, δ13C; Aspartic acid, δ13C, standard deviation; Big_Break_Regional_Shoreline; California; CSIA; DATE/TIME; ecology; estuaries; Event label; Food web; Glutamic acid, δ13C; Glutamic acid δ13C, standard deviation; HAND; Homalophiura inornata; Isoleucine, δ13C; Isoleucine, δ13C, standard deviation; LATITUDE; Leucine, δ13C; Leucine, δ13C, standard deviation; Liberty_Island; LONGITUDE; Lysine, δ13C; Lysine, δ13C, standard deviation; Mildred_Island; Ophiactis asperula; Phenylalanine, δ13C; Phenylalanine, δ13C, standard deviation; Plant functional type; Proline, δ13C; Proline, δ13C, standard deviation; Sacramento-San Joaquin River Delta, California, U.S.A.; Sample ID; Sampling by hand; San Francisco Bay; Serine, δ13C; Serine, δ13C, standard deviation; Site; Species; Species, common name; Threonine, δ13C; Threonine, δ13C, standard deviation; trophic discrimination factor; trophic level; trophic position; Valine, δ13C; Valine, δ13C, standard deviation; δ13C, bulk carbonate  (1)
  • Trophic position  (1)
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  • 1
    facet.materialart.
    Unknown
    Stable carbon isotope amino acids fingerprints of estuarine and freshwater macrophyte and terrestrial primary producers (2021)
    PANGAEA
    Details
    Publication Date: 2024-06-12
    Description: Plant material was collected from aquatic and terrestrial environments from the Sacramento-San Joaquin River Delta. Carbon isotope values of bulk plant tissue and individual amino acids were measured. Fifty-five specimens were collected, including trees, shrubs, forbs, and grasses as well as floating, submerged, and emergent aquatic plants. Bulk tissues were processed and the carbon isotope values were measured following Tipple and Ehleringer, 2018 (Oecologia, 187, 1053-1075). Amino acids were hydrolyzed, derivatized, and isolated following Vokhshoori et al., 2013 (Marine Ecology Progress Series, 504, 59-72). Carbon isotope values of individual amino acids were measured following Vokhshoori et al., 2013. The purpose of this study was to assess if amino acid fingerprints of macrophyte primary producers were distinct from those of marine primary producers and terrestrial vascular plant species. The goal of this study was to provide a benchmark dataset for the next generation of food web monitoring programs within estuarine and mixed source environments.
    Keywords: Alanine, δ13C; Alanine, δ13C, standard deviation; Aspartic acid, δ13C; Aspartic acid, δ13C, standard deviation; Big_Break_Regional_Shoreline; California; CSIA; DATE/TIME; ecology; estuaries; Event label; Food web; Glutamic acid, δ13C; Glutamic acid δ13C, standard deviation; HAND; Homalophiura inornata; Isoleucine, δ13C; Isoleucine, δ13C, standard deviation; LATITUDE; Leucine, δ13C; Leucine, δ13C, standard deviation; Liberty_Island; LONGITUDE; Lysine, δ13C; Lysine, δ13C, standard deviation; Mildred_Island; Ophiactis asperula; Phenylalanine, δ13C; Phenylalanine, δ13C, standard deviation; Plant functional type; Proline, δ13C; Proline, δ13C, standard deviation; Sacramento-San Joaquin River Delta, California, U.S.A.; Sample ID; Sampling by hand; San Francisco Bay; Serine, δ13C; Serine, δ13C, standard deviation; Site; Species; Species, common name; Threonine, δ13C; Threonine, δ13C, standard deviation; trophic discrimination factor; trophic level; trophic position; Valine, δ13C; Valine, δ13C, standard deviation; δ13C, bulk carbonate
    Type: Dataset
    Format: text/tab-separated-values, 1650 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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