Diatom Physiology Controls Silicic Acid Leakage in Response to Iron Fertilization
Abstract
We explore how the iron dependence of the Si:P uptake ratio R Si:P of diatoms controls the response of the global silicon cycle and phytoplankton community structure to Southern Ocean iron fertilization. We use a data‐constrained model of the coupled Si‐P‐Fe cycles that features a mechanistic representation of nutrient colimitations for three phytoplankton classes and that is embedded in a data‐assimilated global ocean circulation model. We consider three parameterizations of the iron dependence of R Si:P , all of which are consistent with the available field data and allow equally good fits to the observed nutrient climatology but result in very different responses to iron fertilization: Depending on how sharply R Si:P decreases with increasing iron concentration, iron fertilization can either cause enhanced silicic acid leakage from the Southern Ocean or strengthened Southern Ocean silicon trapping. Enhanced silicic acid leakage occurs if decreases in R Si:P win over increases in diatom growth, while the converse causes strengthened Southern Ocean silicon trapping. Silicic acid leakage drives a floristic shift in favor of diatoms in the subtropical gyres and stimulates increased low‐latitude opal export. The diatom contribution to global phosphorus export increases, but the lower diatom silicon requirement under iron‐replete conditions reducesmore »
- Authors:
-
- Department of Applied Mathematics, School of Mathematics and Statistics University of New South Wales Sydney New South Wales Australia
- Department of Earth System Sciences University of California Irvine CA USA
- Earth Research Institute and Department of Geography University of California Santa Barbara CA USA
- Department of Ecology, Evolution and Marine Biology, The Marine Science Institute University of California Santa Barbara CA USA
- Publication Date:
- Sponsoring Org.:
- USDOE
- OSTI Identifier:
- 1577927
- Grant/Contract Number:
- SC0016539
- Resource Type:
- Publisher's Accepted Manuscript
- Journal Name:
- Global Biogeochemical Cycles
- Additional Journal Information:
- Journal Name: Global Biogeochemical Cycles Journal Volume: 33 Journal Issue: 12; Journal ID: ISSN 0886-6236
- Publisher:
- American Geophysical Union (AGU)
- Country of Publication:
- United States
- Language:
- English
Citation Formats
Holzer, Mark, Pasquier, Benoit, DeVries, Timothy, and Brzezinski, Mark. Diatom Physiology Controls Silicic Acid Leakage in Response to Iron Fertilization. United States: N. p., 2019.
Web. doi:10.1029/2019GB006460.
Holzer, Mark, Pasquier, Benoit, DeVries, Timothy, & Brzezinski, Mark. Diatom Physiology Controls Silicic Acid Leakage in Response to Iron Fertilization. United States. https://doi.org/10.1029/2019GB006460
Holzer, Mark, Pasquier, Benoit, DeVries, Timothy, and Brzezinski, Mark. Tue .
"Diatom Physiology Controls Silicic Acid Leakage in Response to Iron Fertilization". United States. https://doi.org/10.1029/2019GB006460.
@article{osti_1577927,
title = {Diatom Physiology Controls Silicic Acid Leakage in Response to Iron Fertilization},
author = {Holzer, Mark and Pasquier, Benoit and DeVries, Timothy and Brzezinski, Mark},
abstractNote = {We explore how the iron dependence of the Si:P uptake ratio R Si:P of diatoms controls the response of the global silicon cycle and phytoplankton community structure to Southern Ocean iron fertilization. We use a data‐constrained model of the coupled Si‐P‐Fe cycles that features a mechanistic representation of nutrient colimitations for three phytoplankton classes and that is embedded in a data‐assimilated global ocean circulation model. We consider three parameterizations of the iron dependence of R Si:P , all of which are consistent with the available field data and allow equally good fits to the observed nutrient climatology but result in very different responses to iron fertilization: Depending on how sharply R Si:P decreases with increasing iron concentration, iron fertilization can either cause enhanced silicic acid leakage from the Southern Ocean or strengthened Southern Ocean silicon trapping. Enhanced silicic acid leakage occurs if decreases in R Si:P win over increases in diatom growth, while the converse causes strengthened Southern Ocean silicon trapping. Silicic acid leakage drives a floristic shift in favor of diatoms in the subtropical gyres and stimulates increased low‐latitude opal export. The diatom contribution to global phosphorus export increases, but the lower diatom silicon requirement under iron‐replete conditions reduces the global opal export. Regardless of R Si:P parameterization, the global response of the biological phosphorus and silicon pumps is dominated by the Southern Ocean. The Si isotope signature of opal flux becomes systematically lighter with increasing iron‐induced silicic acid leakage, consistent with sediment records from iron‐rich glacial periods.},
doi = {10.1029/2019GB006460},
journal = {Global Biogeochemical Cycles},
number = 12,
volume = 33,
place = {United States},
year = {Tue Dec 10 00:00:00 EST 2019},
month = {Tue Dec 10 00:00:00 EST 2019}
}
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Works referenced in this record:
Atmospheric dust under glacial and interglacial conditions
journal, July 1998
- Andersen, Katrine K.; Armengaud, Alexandre; Genthon, Christophe
- Geophysical Research Letters, Vol. 25, Issue 13
Iron-limited diatom growth and Si:N uptake ratios in a coastal upwelling regime
journal, June 1998
- Hutchins, David A.; Bruland, Kenneth W.
- Nature, Vol. 393, Issue 6685
An ecosystem model of the global ocean including Fe, Si, P colimitations: AN ECOSYSTEM MODEL OF THE WORLD OCEAN
journal, June 2003
- Aumont, Olivier; Maier-Reimer, Ernst; Blain, Stéphane
- Global Biogeochemical Cycles, Vol. 17, Issue 2
Iron and silicic acid concentrations regulate Si uptake north and south of the Polar Frontal Zone in the Pacific Sector of the Southern Ocean
journal, January 2000
- M. Franck, Valerie; Brzezinski, Mark A.; Coale, Kenneth H.
- Deep Sea Research Part II: Topical Studies in Oceanography, Vol. 47, Issue 15-16
A global compilation of dissolved iron measurements: focus on distributions and processes in the Southern Ocean
journal, January 2012
- Tagliabue, A.; Mtshali, T.; Aumont, O.
- Biogeosciences, Vol. 9, Issue 6
Regional impacts of iron-light colimitation in a global biogeochemical model
journal, January 2010
- Galbraith, E. D.; Gnanadesikan, A.; Dunne, J. P.
- Biogeosciences, Vol. 7, Issue 3
MESMO 2: a mechanistic marine silica cycle and coupling to a simple terrestrial scheme
journal, January 2013
- Matsumoto, K.; Tokos, K.; Huston, A.
- Geoscientific Model Development, Vol. 6, Issue 2
Carbon-based phytoplankton size classes retrieved via ocean color estimates of the particle size distribution
journal, January 2016
- Kostadinov, Tihomir S.; Milutinović, Svetlana; Marinov, Irina
- Ocean Science, Vol. 12, Issue 2
First description of the Minnesota Earth System Model for Ocean biogeochemistry (MESMO 1.0)
journal, January 2008
- Matsumoto, K.; Tokos, K. S.; Price, A. R.
- Geoscientific Model Development, Vol. 1, Issue 1
Silicic acid dynamics in the glacial sub-Antarctic: Implications for the silicic acid leakage hypothesis: Si DYNAMIC IN SUB-ANTARCTIC AND SALH
journal, August 2007
- Beucher, Charlotte P.; Brzezinski, Mark A.; Crosta, Xavier
- Global Biogeochemical Cycles, Vol. 21, Issue 3
Enhanced carbon pump inferred from relaxation of nutrient limitation in the glacial ocean
journal, June 2009
- Pichevin, L. E.; Reynolds, B. C.; Ganeshram, R. S.
- Nature, Vol. 459, Issue 7250
A global model of silicon cycling: Sensitivity to eddy parameterization and dissolution
journal, March 1999
- Gnanadesikan, Anand
- Global Biogeochemical Cycles, Vol. 13, Issue 1
Evidence of silicic acid leakage to the tropical Atlantic via Antarctic Intermediate Water during Marine Isotope Stage 4: EVIDENCE OF GLACIAL SILICIC ACID LEAKAGE
journal, June 2013
- Griffiths, James D.; Barker, Stephen; Hendry, Katharine R.
- Paleoceanography, Vol. 28, Issue 2
A simple nutrient-dependence mechanism for predicting the stoichiometry of marine ecosystems
journal, June 2015
- Galbraith, Eric D.; Martiny, Adam C.
- Proceedings of the National Academy of Sciences, Vol. 112, Issue 27
The GEOTRACES Intermediate Data Product 2014
journal, December 2015
- Mawji, Edward; Schlitzer, Reiner; Dodas, Elena Masferrer
- Marine Chemistry, Vol. 177
The number of past and future regenerations of iron in the oceanand its intrinsic fertilization efficiency
journal, January 2018
- Pasquier, Benoît; Holzer, Mark
- Biogeosciences, Vol. 15, Issue 23
High-latitude controls of thermocline nutrients and low latitude biological productivity
journal, January 2004
- Sarmiento, J. L.; Gruber, N.; Brzezinski, M. A.
- Nature, Vol. 427, Issue 6969
A switch from Si(OH) 4 to NO 3 − depletion in the glacial Southern Ocean
journal, January 2002
- Brzezinski, Mark A.
- Geophysical Research Letters, Vol. 29, Issue 12
Using silicon isotopes to understand the role of the Southern Ocean in modern and ancient biogeochemistry and climate
journal, April 2014
- Hendry, Katharine R.; Brzezinski, Mark A.
- Quaternary Science Reviews, Vol. 89
Inverse-model estimates of the ocean's coupled phosphorus, silicon, and iron cycles
journal, January 2017
- Pasquier, Benoît; Holzer, Mark
- Biogeosciences, Vol. 14, Issue 18
Upper ocean ecosystem dynamics and iron cycling in a global three-dimensional model: GLOBAL ECOSYSTEM-BIOGEOCHEMICAL MODEL
journal, December 2004
- Moore, J. Keith; Doney, Scott C.; Lindsay, Keith
- Global Biogeochemical Cycles, Vol. 18, Issue 4
Diatom productivity in the equatorial Pacific Ocean from the last glacial period to the present: A test of the silicic acid leakage hypothesis: A TEST OF THE SILICIC LEAKAGE HYPOTHESIS
journal, October 2006
- Bradtmiller, L. I.; Anderson, R. F.; Fleisher, M. Q.
- Paleoceanography, Vol. 21, Issue 4
Growth rates, half-saturation constants, and silicate, nitrate, and phosphate depletion in relation to iron availability of four large, open-ocean diatoms from the Southern Ocean
journal, November 2004
- Timmermans, Klaas R.; van der Wagt, Bas; de Baar, Hein J. W.
- Limnology and Oceanography, Vol. 49, Issue 6
Phytoplankton class-specific primary production in the world's oceans: Seasonal and interannual variability from satellite observations: PHYTOPLANKTON CLASS-SPECIFIC PRODUCTION
journal, August 2010
- Uitz, Julia; Claustre, Hervé; Gentili, Bernard
- Global Biogeochemical Cycles, Vol. 24, Issue 3
Southern ocean nitrogen and silicon dynamics during the last deglaciation
journal, October 2011
- Horn, Matthew G.; Beucher, Charlotte P.; Robinson, Rebecca S.
- Earth and Planetary Science Letters, Vol. 310, Issue 3-4
Ocean nutrient ratios governed by plankton biogeography
journal, September 2010
- Weber, Thomas S.; Deutsch, Curtis
- Nature, Vol. 467, Issue 7315
Thick-shelled, grazer-protected diatoms decouple ocean carbon and silicon cycles in the iron-limited Antarctic Circumpolar Current
journal, November 2013
- Assmy, P.; Smetacek, V.; Montresor, M.
- Proceedings of the National Academy of Sciences, Vol. 110, Issue 51
Some thoughts on the concept of colimitation: Three definitions and the importance of bioavailability
journal, January 2008
- Saito, Mak A.; Goepfert, Tyler J.; Ritt, Jason T.
- Limnology and Oceanography, Vol. 53, Issue 1
Silicic acid leakage from the Southern Ocean: A possible explanation for glacial atmospheric p CO 2 : SOUTHERN OCEAN SILICIC ACID LEAKAGE
journal, July 2002
- Matsumoto, Katsumi; Sarmiento, Jorge L.; Brzezinski, Mark A.
- Global Biogeochemical Cycles, Vol. 16, Issue 3
Coupled changes in the cell morphology and elemental (C, N, and Si) composition of the pennate diatom Pseudo-nitzschia due to iron deficiency
journal, September 2007
- Marchetti, Adrian; Harrison, Paul J.
- Limnology and Oceanography, Vol. 52, Issue 5
Iron and silicic acid effects on phytoplankton productivity, diversity, and chemical composition in the central equatorial Pacific Ocean
journal, October 2009
- Marchetti, Adrian; Varela, Diana E.; Lance, Veronica P.
- Limnology and Oceanography, Vol. 55, Issue 1
Opal burial in the equatorial Atlantic Ocean over the last 30 ka: Implications for glacial-interglacial changes in the ocean silicon cycle: EQUATORIAL ATLANTIC OPAL BURIAL
journal, December 2007
- Bradtmiller, L. I.; Anderson, R. F.; Fleisher, M. Q.
- Paleoceanography, Vol. 22, Issue 4
THE Si:C:N RATIO OF MARINE DIATOMS: INTERSPECIFIC VARIABILITY AND THE EFFECT OF SOME ENVIRONMENTAL VARIABLES1
journal, September 1985
- Brzezinski, Mark A.
- Journal of Phycology, Vol. 21, Issue 3
Silicic acid leakage from the Southern Ocean: Opposing effects of nutrient uptake and oceanic circulation: SALH AND OCEANIC CIRCULATION
journal, July 2007
- Crosta, X.; Beucher, C.; Pahnke, K.
- Geophysical Research Letters, Vol. 34, Issue 13
Dust sources and deposition during the last glacial maximum and current climate: A comparison of model results with paleodata from ice cores and marine sediments
journal, July 1999
- Mahowald, Natalie; Kohfeld, Karen; Hansson, Margaret
- Journal of Geophysical Research: Atmospheres, Vol. 104, Issue D13
Testing the silica leakage hypothesis with sedimentary opal records from the eastern equatorial Pacific over the last 150 kyrs
journal, January 2006
- Kienast, S. S.; Kienast, M.; Jaccard, S.
- Geophysical Research Letters, Vol. 33, Issue 15
Radium 228 based nitrate fluxes in the eastern Indian Ocean and the South China Sea and a silicon-induced “alkalinity pump” hypothesis
journal, September 2001
- Nozaki, Yoshiyuki; Yamamoto, Yoshiyuki
- Global Biogeochemical Cycles, Vol. 15, Issue 3
Empirical and mechanistic models for the particle export ratio: MODELING THE PARTICLE EXPORT RATIO
journal, December 2005
- Dunne, John P.; Armstrong, Robert A.; Gnanadesikan, Anand
- Global Biogeochemical Cycles, Vol. 19, Issue 4
The evolutionary inheritance of elemental stoichiometry in marine phytoplankton
journal, September 2003
- Quigg, Antonietta; Finkel, Zoe V.; Irwin, Andrew J.
- Nature, Vol. 425, Issue 6955
Different mechanisms of silicic acid leakage and their biogeochemical consequences
journal, March 2014
- Matsumoto, Katsumi; Chase, Zanna; Kohfeld, Karen
- Paleoceanography, Vol. 29, Issue 3
Southern Ocean nutrient trapping and the efficiency of the biological pump: SOUTHERN OCEAN NUTRIENT TRAPPING
journal, May 2013
- Primeau, François W.; Holzer, Mark; DeVries, Timothy
- Journal of Geophysical Research: Oceans, Vol. 118, Issue 5
High-resolution opal records from the eastern tropical Pacific provide evidence for silicic acid leakage from HNLC regions during glacial periods
journal, May 2011
- Arellano-Torres, Elsa; Pichevin, Laetitia E.; Ganeshram, Raja S.
- Quaternary Science Reviews, Vol. 30, Issue 9-10
Preformed phosphate, soft tissue pump and atmospheric CO<SUB>2</SUB>
journal, July 2005
- Ito, Takamitsu; Follows, Michael J.
- Journal of Marine Research, Vol. 63, Issue 4
The Southern Ocean silicon trap: Data-constrained estimates of regenerated silicic acid, trapping efficiencies, and global transport paths: Ocean Silicon Cycle
journal, January 2014
- Holzer, Mark; Primeau, François W.; DeVries, Timothy
- Journal of Geophysical Research: Oceans, Vol. 119, Issue 1
Influence of iron availability on nutrient consumption ratio of diatoms in oceanic waters
journal, June 1998
- Takeda, Shigenobu
- Nature, Vol. 393, Issue 6687
Silicon-isotope composition of diatoms as an indicator of past oceanic change
journal, October 1998
- De La Rocha, C. L.; Brzezinski, M. A.; DeNiro, M. J.
- Nature, Vol. 395, Issue 6703
Sustained climate warming drives declining marine biological productivity
journal, March 2018
- Moore, J. Keith; Fu, Weiwei; Primeau, Francois
- Science, Vol. 359, Issue 6380
Deglacial subarctic Pacific surface water hydrography and nutrient dynamics and links to North Atlantic climate variability and atmospheric CO 2 : Subarctic Pacific Diatom
journal, July 2015
- Maier, E.; Méheust, M.; Abelmann, A.
- Paleoceanography, Vol. 30, Issue 7
A corollary to the silicic acid leakage hypothesis: SALH COROLLARY
journal, April 2008
- Matsumoto, Katsumi; Sarmiento, Jorge L.
- Paleoceanography, Vol. 23, Issue 2
The changing roles of iron and vertical mixing in regulating nitrogen and silicon cycling in the Southern Ocean over the last glacial cycle: N and Si in the glacial Southern Ocean
journal, December 2014
- Robinson, Rebecca S.; Brzezinski, Mark A.; Beucher, Charlotte P.
- Paleoceanography, Vol. 29, Issue 12
Controls on the silicon isotope distribution in the ocean: New diagnostics from a data-constrained model
journal, March 2015
- Holzer, Mark; Brzezinski, Mark A.
- Global Biogeochemical Cycles, Vol. 29, Issue 3
The Internal Cycling of Zinc in the Ocean
journal, December 2018
- Roshan, Saeed; DeVries, Tim; Wu, Jingfeng
- Global Biogeochemical Cycles, Vol. 32, Issue 12
Silicon and the ecology of marine plankton diatoms. I. Thalassiosira pseudonana (Cyclotella nana) grown in a chemostat with silicate as limiting nutrient
journal, March 1973
- Paasche, E.
- Marine Biology, Vol. 19, Issue 2
Sedimentary opal records in the eastern equatorial Pacific: It is not all about leakage: OPAL BURIAL IN EEP SEDIMENTS
journal, December 2010
- Dubois, Nathalie; Kienast, Markus; Kienast, Stephanie
- Global Biogeochemical Cycles, Vol. 24, Issue 4
Global teleconnections in the oceanic phosphorus cycle: Patterns, paths, and timescales: GLOBAL PRODUCTIVITY TELECONNECTIONS
journal, April 2013
- Holzer, Mark; Primeau, François W.
- Journal of Geophysical Research: Oceans, Vol. 118, Issue 4
Processes and patterns of oceanic nutrient limitation
journal, March 2013
- Moore, C. M.; Mills, M. M.; Arrigo, K. R.
- Nature Geoscience, Vol. 6, Issue 9
The Southern Ocean silica cycle
journal, November 2014
- Tréguer, Paul J.
- Comptes Rendus Geoscience, Vol. 346, Issue 11-12
Production and dissolution of biogenic silica in the ocean: Revised global estimates, comparison with regional data and relationship to biogenic sedimentation
journal, September 1995
- Nelson, David M.; Tréguer, Paul; Brzezinski, Mark A.
- Global Biogeochemical Cycles, Vol. 9, Issue 3