Biological controls on marine volatile organic compound emissions: A balancing act at the sea-air interface

Halsey, Kimberly H.; Giovannoni, Stephen J.

doi:10.1016/j.earscirev.2023.104360

Cited by 11 publications

(2 citation statements)

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“…Hydrocarbons were 64% of the total VOC produced, with BTEX accounting for 13% of the emitted VOC pool, accumulating to 11.8 μM. BTEX production by phytoplankton has been proposed to be of sufficient magnitude to influence atmospheric chemistry 19 , unless bacterial VOC consumption prevents BTEX accumulation in the surface ocean 27 . The VOC concentrations we measured could be underestimated because the cultures were grown in vented flasks.…”

Section: Discussionmentioning

confidence: 99%

“…BTEX are produced by some algae 19 , and are growth substrates for a wide variety of bacteria isolated from oilfields 22,23 , soils 24 , groundwater 25 , and wastewater 26 . Less is known about BTEX consumption by marine bacteria, which is likely an important sink that limits BTEX emissions into the atmosphere 27 . Genetic mechanisms underlying bacterial metabolism of some VOCs (e.g., methanol, DMS, acetone, acetaldehyde) have been elucidated 18,28,29 .…”

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confidence: 99%

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Bacterial Volatile Organic Compound Specialists in the Phycosphere

Padaki,

Mayali,

Weber

et al. 2024

Preprint

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Labile dissolved organic carbon (LDOC) in the oceans accounts for ∼ ¼ of global photosynthesis and turns over with a half-life of about one day, fueling one of the largest engines of microbial heterotrophic production on the planet. Volatile organic compounds (VOCs) are poorly constrained components of LDOC. We detected 78 VOCs totaling 18.5 μM in cultures of the model diatomPhaeodactylum tricornutum, including hydrocarbons usually found in petroleum. In five individual cocultures with bacteria adapted to grow with this diatom, 1 to 66 VOCs were depleted. Two of the most active VOC consumers,MarinobacterandRoseibium,had more VOC oxidation genes, and attached to the diatom, suggesting VOC specialism. Diatom photosynthesis increased by up to 29% in the presence of VOC consumers, indicating that VOC consumption by heterotrophic bacteria in the phycosphere – a region of rapid organic carbon oxidation that surrounds phytoplankton cells – could impact global rates of primary production.

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Section: Discussionmentioning

confidence: 99%