Trace metal contents of autotrophic flagellates from contrasting open‐ocean ecosystems

Sofen, Laura E.; Antipova, Olga A.; Ellwood, Michael J.; Gilbert, Naomi E.; LeCleir, Gary R.; Lohan, Maeve C.; Mahaffey, Claire; Mann, Elizabeth L.; Ohnemus, Daniel C.; Wilhelm, Steven W.; Twining, Benjamin S.

doi:10.1002/lol2.10258

Trace metal contents of autotrophic flagellates from contrasting open‐ocean ecosystems

Journal Article · Thu May 26 00:00:00 EDT 2022 · Limnology and Oceanography Letters

DOI:https://doi.org/10.1002/lol2.10258· OSTI ID:1870025

^[1]; ^[2]; ^[3]; Gilbert, Naomi E. ^[4]; LeCleir, Gary R. ^[4]; Lohan, Maeve C. ^[5]; Mahaffey, Claire ^[6]; Mann, Elizabeth L. ^[1]; Ohnemus, Daniel C. ^[1]; ^[4]; ^[1]

Bigelow Laboratory for Ocean Sciences East Boothbay Maine USA
X‐Ray Science Division Advanced Photon Source, Argonne National Laboratory Lemont Illinois USA
Research School of Earth Sciences Australian National University Canberra Australia
Department of Microbiology The University of Tennessee Knoxville Tennessee USA
Ocean and Earth Sciences, National Oceanography Centre University of Southampton Southampton UK
Department of Earth, Ocean, and Ecological Sciences University of Liverpool Liverpool UK

Abstract

Nano‐ and picophytoplankton are a major component of open‐ocean ecosystems and one of the main plankton functional types in biogeochemical models, yet little is known about their trace metal contents. In cultures of the picoeukaryote Ostreococcus lucimarinus , iron limitation reduced iron quotas by 68%, a fraction of the plasticity known in diatoms. In contrast, a commonly co‐occurring cyanobacterium, Prochlorococcus , showed variable iron contents with iron availability in culture. Synchrotron X‐ray fluorescence was used to measure single‐cell metal (Mn, Fe, Co, Ni, Zn) quotas of autotrophic flagellates (1.4–16.8‐ μ m diameter) collected from four ocean regions. Iron quotas were tightly constrained and showed little response to iron availability, similar to cultured Ostreococcus . Zinc quotas also did not vary with zinc availability but appeared to vary with phosphorus availability. These results suggest that macronutrient and metal availability may be equally important for controlling metal contents of small eukaryotic open‐ocean phytoplankton.

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Research Organization:: Argonne National Laboratory (ANL), Argonne, IL (United States)

Sponsoring Organization:: Australian Research Council; National Science Foundation (NSF); Natural Environment Research Council (NERC); USDOE; USDOE Office of Science (SC), Basic Energy Sciences (BES). Scientific User Facilities (SUF)

Grant/Contract Number:: AC02-05CH11231; AC02-06CH11357

OSTI ID:: 1870025

Alternate ID(s):: OSTI ID: 1870026
OSTI ID: 1971117

Journal Information:: Limnology and Oceanography Letters, Journal Name: Limnology and Oceanography Letters Journal Issue: 4 Vol. 7; ISSN 2378-2242

Publisher:: Wiley Blackwell (John Wiley & Sons)Copyright Statement

Country of Publication:: United States

Language:: English

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