Microbiology of shallow hydrothermal vent sites off Palaeochori Bay, Milos (Hellenic Volcanic Arc)
Dando, P.R.; Thomm, M.; Arab, H.; Brehmer, M.; Hooper, L.E.; Jochimsen, B.; Schlesner, H.; Stohr, R.; Miquel, J.C.; Fowler, S.W. (1998). Microbiology of shallow hydrothermal vent sites off Palaeochori Bay, Milos (Hellenic Volcanic Arc). Cah. Biol. Mar. 39(3-4): 369-372. https://dx.doi.org/10.21411/CBM.A.634ABC44
In: Cahiers de Biologie Marine. Station Biologique de Roscoff: Paris. ISSN 0007-9723; e-ISSN 2262-3094
Also appears in:
(1998). Proceedings of the First International Symposium on Deep-Sea Hydrothermal Vent Biology: Funchal, Madeira, Portugal 20-24 October 1997. Cahiers de Biologie Marine, 39(3-4). Station Biologique de Roscoff: Roscoff. 219-392 pp., more
The Hellenic Volcanic Arc, extending from the Turkish coast and the island of Kos in the east to Methana in the west, has been formed by the subduction of the African plate under the Aegean microplate. Extensive gasohydrothermal venting occurs off many of the islands, from the intertidal zone to depths of more than 100 m. The island of Milos has hydrothermal venting over approximately 34 km2 of seabed. Conspicuous minero-bacterial mats cover extensive brine seep areas, with salinities up to 85 per thousand, capital sigma H2S to 2.4 mM, NH4+ to 0.7 mM and capital sigma CO2 to 12 mM (Fitzsimons et al., 1997). The temperatures of venting fluids in only 10 m of water vary between ambient and 123oC. In the highest temperature areas elemental sulphur coats sand grains on the seabed, forming conspicuous yellow patches. The gases released are largely CO2 but have up to 10% methane, 9% hydrogen and 8% hydrogen sulphide. This mixture of conditions provides microhabitats for a wide variety of Eubacteria and Archaea. Here we describe some of the microbiology of the vent areas, report the isolation of novel prokaryotes and the molecular analyses of archaeal communities in sediments and sinking particulates from Paleochori Bay, in the southeast of Milos.
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