title: Trade-Off Between Dimethyl Sulfide and Isoprene Emissions from Marine Phytoplankton.
abstract: Marine phytoplankton emit volatile organic compounds (VOCs) such as dimethyl sulfide (DMS) and isoprene that influence air quality, cloud dynamics, and planetary albedo. We show that globally (i) marine phytoplankton taxa tend to emit either DMS or isoprene, and (ii) sea-water surface concentration and emission hotspots of DMS and isoprene have opposite latitudinal gradients. We argue that a convergence of antioxidant functions between DMS and isoprene is possible, driven by potential metabolic competition for photosynthetic substrates. Linking phytoplankton emission traits to their latitudinal niches, we hypothesize that natural selection favors DMS emission in cold (polar) waters and isoprene emission in warm (tropical) oceans, and that global warming may expand the geographic range of marine isoprene-emitters. A trade-off between DMS and isoprene at metabolic, organismal, and geographic levels may have important consequences for future marine biosphere-atmosphere interactions.
authors.affiliation: Istituto per lo Studio degli Ecosistemi, Consiglio Nazionale delle Ricerche, Via Madonna del Piano 10, Sesto Fiorentino, 50019 Firenze, Italy; School of Biology, Indian Institute of Science Education and Research, Thiruvananthapuram, 695016 Kerala, India. Electronic address: srikantadani@yahoo.co.uk.
authors.forename: K G Srikanta
authors.initials: KGS
authors.lastname: Dani
authors.affiliation: Dipartimento di Scienze Bio-Agroalimentari, Consiglio Nazionale delle Ricerche, Piazzale Aldo Moro 7, 00185 Roma, Italy. Electronic address: francesco.loreto@cnr.it.
authors.forename: Francesco
authors.initials: F
authors.lastname: Loreto
mesh_terms: D002070:Butadienes / Q000378:metabolism*; D045782:Hemiterpenes / Q000378:metabolism*; D008386:Marine Biology; D010420:Pentanes / Q000378:metabolism*; D010839:Phytoplankton / Q000378:metabolism*; D013440:Sulfides / Q000378:metabolism*; D055549:Volatile Organic Compounds / Q000378:metabolism
chemical_list: D002070:Butadienes; D045782:Hemiterpenes; D010420:Pentanes; D013440:Sulfides; D055549:Volatile Organic Compounds; C005059:isoprene; C004784:dimethyl sulfide