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Articles by Seth John
Phosphorus limitation heightens vulnerability of Crocosphaera watsonii to ocean warming compared with iron limitation
Introduction Phytoplankton photosynthesis accounts for nearly half of the earth’s primary productivity. However, in the oligotrophic ocean gyres, their growth is constrained by limited amounts of bioavailable nitrogen (N) (Behrenfeld et al., 2006).
Microbial iron limitation in the ocean’s twilight zone - Nature
Abstract Primary production in the sunlit surface ocean is regulated by the supply of key nutrients, primarily nitrate, phosphate and iron (Fe), required by phytoplankton to fix carbon dioxide into biomass1,2,3. Below the surface ocean, remineralization of sinking organic matter rapidly regenerates nutrients, and microbial metabolism in the upper mesopelagic ‘twilight zone’ (200–500 m) is thought to be limited by the delivery of labile organic carbon4,5.
Responses of globally important phytoplankton species to olivine dissolution products and implications for carbon dioxide removal via ocean alkalinity enhancement
Abstract Anthropogenic greenhouse gas emissions are leading to global temperature increases, ocean acidification, and significant ecosystem impacts. Given current emissions trajectories, the IPCC reports indicate that rapid abatement of CO2 emissions and development of carbon dioxide removal (CDR) strategies that can address legacy emissions and difficult to abate emissions sources. These CDR methods must efficiently and safely sequester gigatons of atmospheric CO2.
Open science resources from the Tara Pacific expedition across coral reef and surface ocean ecosystems - Scientific Data
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The full collection of datasets has been deposited either at Pangaea or at Zenodo depending on their nature, but also on the likelihood to be updated.
By Fabien Lombard, Guillaume Bourdin, Alberto Baudena, Jean-François Ghiglione, Seth John, Ilan Koren, Ryan McMinds, Nicolas Metzl, David A. Paz-García, Julie Poulain, Sarah Romac, Eric Röttinger, Assaf Vardi, Christian R. Voolstra, Chris Bowler, Pierre Galand, Shinichi Sunagawa, Olivier P. THOMAS, Patrick Wincker, Didier Zoccola, Denis Allemand, Emmanuel Boss, Nicolas Cassar, Mireille Pujo-Pay
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Nature
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Responses of keystone phytoplankton groups to olivine dissolution products and implications for carbon dioxide removal via ocean alkalinity enhancement
Abstract Anthropogenic greenhouse gas emissions are leading to global temperature increases, ocean acidification, and significant ecosystem impacts. Given current emissions trajectories, the IPCC calls for both the rapid abatement of CO2 emissions and development of carbon dioxide removal (CDR) strategies that can address legacy emissions and difficult to abate emissions sources. These CDR methods must efficiently and safely sequester gigatons of atmospheric CO2.
The biogeochemical balance of oceanic nickel cycling - Nature Geoscience
Abstract Nickel is a biologically essential element for marine life, with the potential to influence diverse processes, including methanogenesis, nitrogen uptake and coral health, in both modern and past oceans. However, an incomplete view of oceanic Ni cycling has stymied understanding of how Ni may impact marine life in these modern and ancient oceans.
Metabolic and biogeochemical consequences of viral infection in aquatic ecosystems
Abstract Ecosystems are controlled by ‘bottom-up’ (resources) and ‘top-down’ (predation) forces. Viral infection is now recognized as a ubiquitous top-down control of microbial growth across ecosystems but, at the same time, cell death by viral predation influences, and is influenced by, resource availability.
Biological uptake and reversible scavenging of zinc in the global ocean
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