The DOI matches its Crossref record; 9 of the 9 references it cites were found in a registry or an index.
Diel and depth variations in dissolved free amino acids and ammonium in the Baltic Sea determined by shipboard HPLC analysis1
Abstract
A precolumn fluorimetric labeling method was tested for shipboard HPLC analysis of dissolved free amino acids (DFAA) in natural waters. No sample preparation is required and all naturally occurring amino acids plus ammonium are sufficiently separated within 30 min. Striking diel trends were observed to a depth of at least 60 m, with maximal DFAA concentrations (200–400 nM) in the late evening and minimal concentrations (30–40 nM) in the early day. Concurrent with the evening concentration maxima were elevated relative abundances of basic amino acids (especially ornithine and lysine) and ammonium. During the day very low levels of amino acids were found in the upper water. The magnitude of the night‐to‐day drop in total DFAA suggests a net heterotrophic uptake rate of up to 6 µ g AA·liter−1 h−1. A pronounced amino acid maximum at the O 2−HS− interface in the water column was presumably derived from microbial populations inhabiting this region. Pronounced, coincidental minima in amino acid and ammonium concentrations just above this interface may be related either to scavaging by precipitating metal oxyhydroxides or to enhanced heterotrophic utilization.
Overview
The claims and statistics of this paper haven’t been checked yet.
Run the check — free, no account needed. It reads the open-access text and checks the sources it cites.
Integrity signals
Registry
Cites
Statistics
Verification
Claims the paper makes
The claims and statistics of this paper haven’t been checked yet.
Run the check — free, no account needed. It reads the open-access text and checks the sources it cites.
Self-check
Percentages, sums and reported differences re-computed from the paper’s own numbers.
The self-check needs the paper’s full text.
Citations
Cites
Release of dissolved organic carbon by grazing zooplankton
Lampert, W. (1978) · Limnology and Oceanography · doi:10.4319/lo.1978.23.4.0831 · Cited by 382
Excretion of organic matter by marine phytoplankton: Do healthy cells do it?1
Sharp, J. H. (1977) · Limnology and Oceanography · doi:10.4319/lo.1977.22.3.0381 · Cited by 343
The Utilization of Dissolved Free Amino Acids by Estuarine Microorganisms
Crawford, C. C., Hobbie, J. E., & Webb, K. L. (1974) · Ecology · doi:10.2307/1935146 · Cited by 238
Andrews, P., & Williams, P. (1971) · Journal of the Marine Biological Association of the United Kingdom · doi:10.1017/s0025315400006500 · Cited by 171
Amino acid uptake by marine phytoplankters1,2
Wheeler, P. A., North, B. B., & Stephens, G. C. (1974) · Limnology and Oceanography · doi:10.4319/lo.1974.19.2.0249 · Cited by 159
DISSOLVED FREE AMINO ACIDS IN SOUTHERN CALIFORNIA COASTAL WATER1
Clark, M. E., Jackson, G. A., & North, W. J. (1972) · Limnology and Oceanography · doi:10.4319/lo.1972.17.5.0749 · Cited by 100
Chemical investigations of Atlantis II and discovery brines in the Red Sea
Danielsson, L., Dyrssen, D. W., & Granéli, A. (1980) · Geochimica et Cosmochimica Acta · doi:10.1016/0016-7037(80)90203-3 · Cited by 59
Uptake of glycine by natural phytoplankton communities
Wheeler, P., North, B. B., Littler, M. M., et al. (1977) · Limnology and Oceanography · doi:10.4319/lo.1977.22.5.0900 · Cited by 58
Short term variability in vertical chlorophyll structure1
Denman, K. L. (1977) · Limnology and Oceanography · doi:10.4319/lo.1977.22.3.0434 · Cited by 24
Cited by
Dynamics and physiology of saxitoxin production by the dinoflagellatesAlexandrium spp.
Anderson, D. M., Kulis, D. M., Sullivan, J. J., Hall, S., & Lee, C. (1990) · Marine Biology · doi:10.1007/bf01314358 · Cited by 365
Minor, E. C., Swenson, M. M., Mattson, B. M., & Oyler, A. R. (2014) · Environ. Sci.: Processes Impacts · doi:10.1039/c4em00062e · Cited by 305
The Earthworm Gut: an Ideal Habitat for Ingested N2O-Producing Microorganisms
Horn, M. A., Schramm, A., & Drake, H. L. (2003) · Applied and Environmental Microbiology · doi:10.1128/aem.69.3.1662-1669.2003 · Cited by 264
Epidermal amino acid transport in marine invertebrates
Stephens, G. C. (1988) · Biochimica et Biophysica Acta (BBA) - Reviews on Biomembranes · doi:10.1016/0304-4157(88)90022-6 · Cited by 72
Aragonite Precipitation by “Proto-Polyps” in Coral Cell Cultures
Mass, T., Drake, J. L., Haramaty, L., Rosenthal, Y., Schofield, O. M. E., Sherrell, R. M., & Falkowski, P. G. (2012) · PLoS ONE · doi:10.1371/journal.pone.0035049 · Cited by 63
Metadata
- Authors
- Mopper, K., & Lindroth, P.
- Venue
- Limnology and Oceanography
- Publisher
- Wiley
- Published
- 1982-03
- Volume
- 27
- Issue
- 2
- Pages
- 336-347
- ISSN
- 0024-3590 (ISSN-L)
- 1939-5590
- OpenAlex
- W2162540913
- Cited by
- 266
- References
- 9
- FWCI
- 15.48
- Type
- journal article
- Language
- en
- Open access
- closed
About these checks
Registry, retraction, Cites and statistics results are computed, not judged, with one exception: a printed reference that no index lists is read once by a model before it counts as a citation error. Claims are extracted by a model and kept only when their quote appears verbatim in the text; each cited source is then checked, with a model’s help, for whether it says what the claim relies on. Those verdicts can be wrong — read the claim’s quote and the cited source before relying on one.
Statistics and arithmetic are recomputed, not judged.
Confidence bands are shown only for fields calibrated on our annotated test set. None is calibrated yet, so no band is shown.
What counts as a claim ›How we measure confidence ›How we check this ›
Are you an author, or do you see a problem with this page? Request a review
How to cite
Cite CoChat for the checks on this page, and the paper for its own findings.
- This page
- CoChat. (2026). Citation check: Diel and depth variations in dissolved free amino acids and ammonium in the Baltic Sea determined by shipboard HPLC analysis1. https://app.cochat.ai/papers/10.4319/lo.1982.27.2.0336
- The paper
- Mopper, K., & Lindroth, P. (1982). Diel and depth variations in dissolved free amino acids and ammonium in the Baltic Sea determined by shipboard HPLC analysis1. Limnology and Oceanography. https://doi.org/10.4319/lo.1982.27.2.0336
Data sources
Bibliographic data: Semantic Scholar, OpenAlex, Crossref.
Contains information from the Semantic Scholar Academic Graph Datasets, made available under the ODC Attribution License (ODC-BY 1.0).
Semantic Scholar’s data is described in: Kinney, R., et al. (2023). The Semantic Scholar Open Data Platform. arXiv:2301.10140.
