Cited by 101Marine and coastal ecosystemsPlant Micronutrient Interactions and EffectsAquatic Ecosystems and Phytoplankton Dynamics

Biogeochemical cycling of dissolved zinc along the GEOTRACES South Atlantic transect GA10 at 40°S

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Wyatt, N. J., Milne, A., Woodward, E. M. S., Rees, A. P., Browning, T. J., Bouman, H. A., Worsfold, P. J., Lohan, M. C.·2014·Global Biogeochemical Cycles

Abstract

The biogeochemical cycle of zinc (Zn) in the South Atlantic, at 40°S, was investigated as part of the UK GEOTRACES program. To date there is little understanding of the supply of Zn, an essential requirement for phytoplankton growth, to this highly productive region. Vertical Zn profiles displayed nutrient‐like distributions with distinct gradients associated with the water masses present. Surface Zn concentrations are among the lowest reported for the world's oceans (< 50 pM). A strong Zn‐Si linear relationship was observed (Zn (nM) = 0.065 Si (μM), r2 = 0.97, n = 460). Our results suggest that the use of a global Zn‐Si relationship would lead to an underestimation of dissolved Zn in deeper waters of the South Atlantic. By utilizing Si* and a new tracer Zn* our data indicate that the preferential removal of Zn in the Southern Ocean prevented a direct return path for dissolved Zn to the surface waters of the South Atlantic at 40°S and potentially the thermocline waters of the South Atlantic subtropical gyre. The importance of Zn for phytoplankton growth was evaluated using the Zn‐soluble reactive phosphorus (SRP) relationship. We hypothesize that the low Zn concentrations in the South Atlantic may select for phytoplankton cells with a lower Zn requirement. In addition, a much deeper kink at ~ 500m in the Zn:SRP ratio was observed compared to other oceanic regions.

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Crossref · 10.1002/2013gb004637

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  • The recently identified strong Zn-silicate linear relationship in ocean water demonstrates zinc's control on the efficiency of the global biological carbon pump.

    “Moreover, the recently identified strong Zn-silicate linear relationship in ocean water (with vertical Zn and Si profiles showing nutrient-like distributions) demonstrates zinc’s control on the efficiency of the global biological carbon pump53.”

    From Acceleration of dolomitization by zinc in saline waters (2019) · cites this paper as [53]

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Authors
Wyatt, N. J., Milne, A., Woodward, E. M. S., Rees, A. P., Browning, T. J., Bouman, H. A., Worsfold, P. J., & Lohan, M. C.
Affiliations
  • Plymouth Marine Laboratory (GB)
  • University of Plymouth (GB)
  • University of Oxford (GB)
Venue
Global Biogeochemical Cycles
Published
2014-01
Volume
28
Issue
1
Pages
44-56
ISSN
  • 0886-6236 (ISSN-L)
  • 1944-9224
OpenAlex
W1790136460
Cited by
100
References
64
Citations by year
2026: 1 · 2025: 6 · 2024: 8 · 2023: 6 · 2022: 7 · 2021: 10 · 2020: 11 · 2019: 6 · 2018: 12 · 2017: 7 · 2016: 7 · 2015: 8 · 2014: 11
FWCI
7.93
Type
journal article
Language
en
Open access
Locations
  • Global Biogeochemical Cycles (publishedVersion)
  • Marine Biological Association (acceptedVersion)
  • PEARL (University of Plymouth) (submittedVersion)
  • ePrints Soton (University of Southampton) (submittedVersion)
Funders
Natural Environment Research Council (NE/H004289/1, NE/H004475/1, NE/G52388X/1)
Topics
  • Physical Sciences › Earth and Planetary Sciences › Oceanography › Marine and coastal ecosystems
  • Life Sciences › Agricultural and Biological Sciences › Plant Science › Plant Micronutrient Interactions and Effects
  • Physical Sciences › Environmental Science › Environmental Chemistry › Aquatic Ecosystems and Phytoplankton Dynamics
Keywords
dissolved zinc, Southern Ocean, South Atlantic, thermocline, water masses, GEOTRACES

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