Kawahata, Hodaka; Ishizuka, Toshio; Nagao, Toshiyasu (1990): Amino acids in the interstitial waters from ODP Hole 113-695A [dataset publication series]. PANGAEA, https://doi.org/10.1594/PANGAEA.754263, Supplement to: Kawahata, H et al. (1990): Amino acids in the Interstitial Waters from ODP Site 695 in the Weddell Sea, Antarctic Ocean. In: Barker, PF; Kennett, JP; et al. (eds.), Proceedings of the Ocean Drilling Program, Scientific Results, College Station, TX (Ocean Drilling Program), 113, 179-187, https://doi.org/10.2973/odp.proc.sr.113.166.1990
Always quote citation above when using data! You can download the citation in several formats below.
Abstract:
Site 695 lies on the southeast margin of the South Orkney microcontinent on the northern margin of the Weddell Sea, at 62°23.48'S, 43°27.10'W in 1305 m water depth. The inorganic properties of interstitial waters at this site, including sulfate reduction, biogenic methane production, and high concentrations of ammonia and phosphate, imply high microbial activity. However, no clear relationship between amino acid composition and concentration and the type of microbial activity (e.g., sulfate reduction or methane production) can be identified.
The THAA (total hydrolyzable amino acids) values range between 2.45 and 17.31 µmol/L, averaging 7.14 µmol/L. The mean concentrations and relative abundance values of acidic, basic, neutral, aromatic, and sulfur-containing amino acids are 1.34 (18%), 1.09 (15%), 3.93 (54%), 0.50 (8%), and 0.02 (0%) µmol/L, respectively. Glycine is the most abundant amino acid residue, with serine, glutamic acid, and ornithine next. The DFAA (dissolved free amino acids) values range from 0.10 to 12.73 µmol/L, averaging 4.07 µmol/L. The acidic, basic, neutral, aromatic, and sulfurcontaining amino acids are on average 0.21, 0.79, 2.56, 0.41, and 0.01 µmol/L, respectively. The relative abundances of acidic, basic, neutral, and aromatic amino acids average 4%, 18%, 58%, and 15%, respectively.
Predominance of DFAA over DCAA (dissolved combined amino acids) in interstitial waters of Lithologic Units I and II is contrary to the predominance of DCAA over DFAA in other interstitial waters and seawater.
The comparison of amino acid compositions between DCAA and siliceous plankton suggests that the DCAA in interstitial waters originally comes from amino acids derived from siliceous plankton. However, other sources which are much enriched in glutamic acid contribute to the DCAA composition.
Project(s):
Ocean Drilling Program (ODP)
Coverage:
Latitude: -62.391000 * Longitude: -43.451600
Date/Time Start: 1987-02-20T09:30:00 * Date/Time End: 1987-02-23T10:00:00
Event(s):
113-695A * Latitude: -62.391000 * Longitude: -43.451600 * Date/Time Start: 1987-02-20T09:30:00 * Date/Time End: 1987-02-23T10:00:00 * Elevation: -1311.0 m * Penetration: 345.1 m * Recovery: 254.39 m * Location: Weddell Sea * Campaign: Leg113 * Basis: Joides Resolution * Method/Device: Drilling/drill rig (DRILL) * Comment: 37 cores; 348.6 m cored; 0 m drilled; 73 % recovery
License:
Creative Commons Attribution 3.0 Unported (CC-BY-3.0)
Size:
2 datasets
Download Data
Datasets listed in this publication series
- Kawahata, H; Ishizuka, T; Nagao, T (1990): (Table 2) Concentrations of dissolved free amino acids in interstitial waters from ODP Hole 113-695A. https://doi.org/10.1594/PANGAEA.754260
- Kawahata, H; Ishizuka, T; Nagao, T (1990): (Table 3) Concentrations of total hydrolyzable amino acids in interstitial waters from ODP Hole 113-695A. https://doi.org/10.1594/PANGAEA.754262