Manganese co-limitation of phytoplankton growth and major nutrient drawdown in the Southern Ocean.

Browning, Thomas J. , Achterberg, Eric P. , Engel, Anja and Mawji , Edward (2021) Manganese co-limitation of phytoplankton growth and major nutrient drawdown in the Southern Ocean. Open Access Nature Communications, 12 . Art.Nr. 884. DOI 10.1038/s41467-021-21122-6.

[thumbnail of s41467-021-21122-6.pdf]
Preview
Text
s41467-021-21122-6.pdf - Published Version
Available under License Creative Commons: Attribution 4.0.

Download (4MB) | Preview
[thumbnail of 41467_2021_21122_MOESM1_ESM.pdf]
Preview
Text
41467_2021_21122_MOESM1_ESM.pdf - Supplemental Material
Available under License Creative Commons: Attribution 4.0.

Download (1MB) | Preview
[thumbnail of Source data] Other (Source data)
41467_2021_21122_MOESM4_ESM.xlsx - Supplemental Material
Available under License Creative Commons: Attribution 4.0.

Download (25kB)
[thumbnail of GEOMAR Pressemitteilung]
Preview
Text (GEOMAR Pressemitteilung)
pm_2021_12_Mangan_SO.pdf

Download (235kB) | Preview
[thumbnail of GEOMAR Press release] Text (GEOMAR Press release)
pm_2021_12_Manganese-SO_en.pdf

Download (255kB)

Supplementary data:

Abstract

Residual macronutrients in the surface Southern Ocean result from restricted biological utilization, caused by low wintertime irradiance, cold temperatures, and insufficient micronutrients. Variability in utilization alters oceanic CO2 sequestration at glacial-interglacial timescales. The role for insufficient iron has been examined in detail, but manganese also has an essential function in photosynthesis and dissolved concentrations in the Southern Ocean can be strongly depleted. However, clear evidence for or against manganese limitation in this system is lacking. Here we present results from ten experiments distributed across Drake Passage. We found manganese (co-)limited phytoplankton growth and macronutrient consumption in central Drake Passage, whilst iron limitation was widespread nearer the South American and Antarctic continental shelves. Spatial patterns were reconciled with the different rates and timescales for removal of each element from seawater. Our results suggest an important role for manganese in modelling Southern Ocean productivity and understanding major nutrient drawdown in glacial periods.

Document Type: Article
Keywords: Southern Ocean, phytoplankton, ocean productivity, micronutrients, manganese, iron, ocean fertilisation, ocean carbon uptake, glacial-interglacial periods
Research affiliation: OceanRep > GEOMAR > FB2 Marine Biogeochemistry > FB2-BI Biological Oceanography
OceanRep > GEOMAR > FB2 Marine Biogeochemistry > FB2-CH Chemical Oceanography
NOC
OceanRep > GEOMAR > FB2 Marine Biogeochemistry > FB2-CH Chemical Oceanography > FB2-CH Water column biogeochemistry
Main POF Topic: PT6: Marine Life
Refereed: Yes
Open Access Journal?: Yes
Publisher: Nature Research
Date Deposited: 09 Feb 2021 14:44
Last Modified: 07 Feb 2024 15:26
URI: https://oceanrep.geomar.de/id/eprint/51759

Actions (login required)

View Item View Item