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Dipartimento di Biologia Animale ed Ecologia Marina, Universita` di Messina
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- PublicationRestrictedGenesis and geomorphologic and ecological evolution of the Ganzirri salt marsh (Messina, Italy)(2005-12)
; ; ; ; ; ;Bottari, A.; Osservatorio Sismologico, Universita` di Messina ;Bottari, C.; Osservatorio Sismologico, Universita` di Messina ;Carveni, P.; Dipartimento di Scienze Geologiche, Universita` di Catania ;Giacobbe, S.; Dipartimento di Biologia Animale ed Ecologia Marina, Universita` di Messina ;Spanò, N.; Dipartimento di Biologia Animale ed Ecologia Marina, Universita` di Messina; ; ; ; The results of geological and geomorphologic surveys on the salt marsh of Ganzirri (Pantano Grande), combined with geophysical researches and historiographical data, are reported here to define the genesis of the marsh and to evaluate the physical factors that influenced its recent evolution. The genesis of the Pantano Grande may be due to a state of equilibrium reached between differential lowering of the coastal plain, confined by normal faults, and generalized chain uplift. In particular, two normal faults are considered: the first borders the northern shore of the Pantano Grande, and the second bounds the Ionian coastal plain towards the south. Concerning the recent evolution of the Pantano Grande the importance of the sterile conglomerate outcrop, which borders the Ganzirri coastal plain, is stressed. The conglomerate is interposed between sediments that define the Pantano Grande basin, and the Ionian Sea, and influenced the water exchange between the marsh and the sea. Before the excavation of two canals that link up the Pantano Grande with the sea, the conglomerate, limiting the spread of benthic species, has definitively affected the ecological structure of the original marsh.176 26 - PublicationRestrictedBacterial and archaeal populations at two shallow hydrothermal vents off Panarea Island (Eolian Islands, Italy)(2009-01)
; ; ; ; ; ; ;Maugeri, T.; Dipartimento di Biologia Animale ed Ecologia Marina, Universita` di Messina ;Lentini, V.; Dipartimento di Biologia Animale ed Ecologia Marina, Universita` di Messina ;Gugliandolo, C.; Dipartimento di Biologia Animale ed Ecologia Marina, Universita` di Messina ;Italiano, F.; Istituto Nazionale di Geofisica e Vulcanologia, Sezione Palermo, Palermo, Italia ;Cousin, S.; Deutsche Sammlung von Mikroorganismen und Zellkulturen GmbH, ;Stackebrandt, E.; ; ; ; ; The aim of this study was to investigate the microbial community thriving at two shallow hydrothermal vents off Panarea Island (Italy). Physico-chemical characteristics of thermal waters were examined in order to establish the effect of the vents on biodiversity of both Bacteria and Archaea. Water and adjacent sediment samples were collected at different times from two vents, characterised by different depth and temperature, and analysed to evaluate total microbial abundances, sulphuroxidising and thermophilic aerobic bacteria. Total microbial abundances were on average of the order of 105 cells ml-1, expressed as picoplanktonic size fraction. Picophytoplanktonic cells accounted for 0.77–3.83% of the total picoplanktonic cells. The contribution of bacterial and archaeal taxa to prokaryotic community diversity was investigated by PCR–DGGE fingerprinting method. The number of bands derived from bacterial DNA was highest in the DGGE profiles of water sample from the warmest and deepest site (site 2). In contrast, archaeal richness was highest in the water of the coldest and shallowest site (site 1). Sulphur-oxidising bacteria were detected by both culture- dependent and -independent methods. The primary production at the shallow hydrothermal system of Panarea is supported by a complex microbial community composed by phototrophs and chemolithotrophs.390 28