Javier del Campo

@fonamental.bsky.social

Group leader at @ibe-barcelona.bsky.social (@csic.es - @upf.edu) & Adjunct at @miamirosenstiel.bsky.social. Microbial Ecology & Evolution 🔬🌍🧫🧬 🪸 @pr2-database.bsky.social Coordinator #corals #symbiosis #protists

We hypothesize that CaCO3 precipitation in marine fish may not solely be a host-driven process, but potentially the result of a functional symbiosis with gut-associated Vibrio bacteria, expanding the role of symbiosis in marine biomineralization and global biogeochemical cycles.

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We identified a high abundance of vibrios associated with ichthyocarbonates with the metabolic potential for CaCO3 precipitation. Specifically, we observe the expression of ureR by Photobacterium damselae subsp. damselae, which can induce the precipitation of CaCO3 via the production of bicarbonate!

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Marine fish produce CaCO3 precipitates ("ichthyocarbonates") in their guts as part of their osmoregulation strategy. Through this, fish may generate up to 9.04 Pg of new CaCO₃ annually, rivaling coccolithophores and pelagic foraminifera in global carbonate production. (Photo: Joshua Prezant)

A toadfish is pictured next to a beaker holding a collection of carbonate crystals produced from a school of toadfish in one night.

#RequestForProposals We’re inviting teams of two researchers to pursue projects advancing #AquaticSymbiosis (marine + freshwater). Areas of interest include how aquatic environments influence symbiosis, evolutionary ecology & new methods/tech. Details + how to apply:  moore.org/SymbiosisRFP

New funding opportunity: Advancing aquatic symbiosis research

The Gordon and Betty Moore Foundation announces a new request for proposals aimed at advancing understanding of symbiosis in marine and freshwater environments.…

moore.org