@prefix prodottidellaricerca: . @prefix istituto: . @prefix prodotto: . istituto:CDS080 prodottidellaricerca:prodotto prodotto:ID49572 . @prefix modulo: . modulo:ID3986 prodottidellaricerca:prodotto prodotto:ID49572 . @prefix pubblicazioni: . @prefix unitaDiPersonaleInterno: . unitaDiPersonaleInterno:MATRICOLA20384 pubblicazioni:autoreCNRDi prodotto:ID49572 . @prefix rdf: . @prefix retescientifica: . prodotto:ID49572 rdf:type retescientifica:ProdottoDellaRicerca , prodotto:TIPO1101 . @prefix rdfs: . prodotto:ID49572 rdfs:label "Shell architecture, element composition, and stable isotope signature of the giant deep-sea oyster Neopycnodonte zibrowii sp. n. from the NE Atlantic (Articolo in rivista)"@en . @prefix xsd: . prodotto:ID49572 pubblicazioni:anno "2009-01-01T00:00:00+01:00"^^xsd:gYear . @prefix skos: . prodotto:ID49572 skos:altLabel "
Wisshak M.; L\u00F3pez Correa M.; Gofas S.; Salas C.; Taviani M.; Jakobsen J.; Freiwald A. (2009)
Shell architecture, element composition, and stable isotope signature of the giant deep-sea oyster Neopycnodonte zibrowii sp. n. from the NE Atlantic
in Deep-sea research. Part 1. Oceanographic research papers
"^^rdf:HTML ; pubblicazioni:autori "Wisshak M.; L\u00F3pez Correa M.; Gofas S.; Salas C.; Taviani M.; Jakobsen J.; Freiwald A."^^xsd:string ; pubblicazioni:paginaInizio "374"^^xsd:string ; pubblicazioni:paginaFine "407"^^xsd:string ; pubblicazioni:altreInformazioni "doi:10.1016/j.dsr.2008.10.002"^^xsd:string ; pubblicazioni:numeroVolume "56(3)"^^xsd:string . @prefix ns11: . prodotto:ID49572 pubblicazioni:rivista ns11:ID238298 ; skos:note "ISI Web of Science (WOS)"^^xsd:string ; pubblicazioni:affiliazioni "(a) GeoZentrum Nordbayern, Erlangen University, Loewenichstr. 28, D-91054 Erlangen, Germany\n\n(b) Departamento de Biolog\u00EDa Animal, Facultad de Ciencias, Universidad de M\u00E1laga, E-29071 M\u00E1laga, Spain\n\n(c) CNR-Istituto di Scienze Marine, Via Gobetti 101, I-40129 Bologna, Italy\n\n(d) Rebikoff-Niggeler Foundation, Rocha Vermelha, Praia do Almoxarife, 9900-451 Horta, Faial, Azores, Portugal"^^xsd:string ; pubblicazioni:titolo "Shell architecture, element composition, and stable isotope signature of the giant deep-sea oyster Neopycnodonte zibrowii sp. n. from the NE Atlantic"^^xsd:string ; prodottidellaricerca:abstract "A conspicuous new deep-sea oyster, Neopycnodonte zibrowii sp. n., is described from the Azores Archipelago, where it thrives in 420 to >500 m water depth in high densities concealed underneath overhangs. The new species reaches a relatively large size, which may exceed 20 cm, and is characterised by a very unusual hinge line morphology, straight without a bulge of the resilium. It is compared to the extant Indo-Pacific Empressostrea kostini Huber and Lorenz, 2007 and to the cosmopolitan Neopycnodonte cochlear (Poli, 1791), which has a broadly sympatric distribution at shallower depths in the Azores and Bay of Biscay. Radiocarbon dating reveals that individuals reach an impressive lifespan of one to more than five centuries, placing them among the longest-lived molluscs known to date. They often grow on top of each other, forming stacks that resemble dish piles\u0097an effective measure to optimise shell stability with minimal biomineralisation effort, but with the drawback of increased bioerosion ultimately leading to detachment.\n\nThree microstructure types are developed in N. zibrowii: (1) the cross-foliated, calcitic, dorsal to central endostracum and aragonitic ligostracum, (2) the porous vesicular structure of the calcitic ventral endostracum, and (3) the simple prismatic aragonitic myostracum. Foliated and vesicular shell portions show sub-millimetre-scale first-order increments delineated by conchiolin-rich growth breaks (interpreted as reproductive cyclicity), and less distinct second-order increments (interpreted as annual in nature). This pattern is clearly reflected by the elemental composition with the primary growth breaks lacking Ca and Sr but including Mg and S as organic matrix constituents. The second-order increments within the calcite are mirrored by moderately co-varying Mg/Ca and S/Ca fluctuations at stable Sr concentrations, reflecting varying proportions of organic matrix. Dorsal and central endostracum transects reveal a low inter-valve, but considerable inter-specimen variability with high Mg/Ca molar ratios and fluctuations (22.5\u00B117.6 mmol/mol), low Sr/Ca values (0.2\u00B10.1 mmol/mol), and a typical to high S/Ca content (6.9\u00B12.2 mmol/mol), when compared to other calcitic bivalves.\n\nUnlike short-lived, shallow-water oysters, N. zibrowii thrives under very stable environmental conditions. Minimal temperature fluctuations and stable open marine salinity provide an optimal basis to recognise biological fractionation processes. Strong Mg/Ca fluctuations indicate a physiological control related to metabolism and biomineralisation, prohibiting the use of this ratio as a temperature or ocean chemistry proxy. Low Sr/Ca ratios indicate rather constant and low long-term accretion rates, while short-scale fluctuations may be attributed to short-term variations in growth rate and Mg incorporation. Oxygen isotopes yield a considerable spread of 1.8\u0089 with a mean of 2.0\u00B10.3\u0089 \u00B418O V-PDB, and low correlation between different contemporaneous parts of the shell and between specimens. These values surprisingly exceed expected equilibrium conditions, calculated from in situ temperature data (annual mean 12.3\u00B10.3 \u00B0C) and seawater isotopic composition (0.5\u00B10.1\u0089 \u00B418O SMOW), by 0.5\u0089 on average. Such positively shifting vital effects, previously reported for limpets and barnacles, are often overlooked in high-temperature and high-amplitude settings and may be more common than is currently believed. Carbon isotopes range from 0.2 to 3.5\u0089 \u00B413C V-PDB (mean 1.8\u00B10.7\u0089) and show an ontogenetic decrease, but may incorporate an environmental signal in adult portions, indicated by a strong correspondence of peaks between specimens. This signal is likely driven by a complex interplay of different factors, such as primary production, current-based food supply and metabolism." ; prodottidellaricerca:prodottoDi modulo:ID3986 , istituto:CDS080 ; pubblicazioni:autoreCNR unitaDiPersonaleInterno:MATRICOLA20384 . @prefix parolechiave: . prodotto:ID49572 parolechiave:insiemeDiParoleChiave . ns11:ID238298 pubblicazioni:rivistaDi prodotto:ID49572 . parolechiave:insiemeDiParoleChiaveDi prodotto:ID49572 .