Naslov
Mineral Composition of Benthic Marine Organisms Attached to the Antique Sculpture of Apoxyomenos

Autori
Medaković, Davorin ; Skoko, Željko ; Popović, Stanko

Vrsta, podvrsta i kategorija rada
Sažeci sa skupova, sažetak, znanstveni

Izvornik
Fifteenth Slovenian-Croatian Crystallographic Meeting / Lah, Nina ; Leban, Ivan - Ljubljana : Laboratory of Inorganic Chemistry, Faculty of Chemistry and Chemical Technology, University of Ljubljana, Slovenia, 2006, 23-23

Skup
Fifteenth Slovenian-Croatian Crystallographic Meeting

Mjesto i datum
Jezersko, Slovenija, 15.06.2006. - 18.06.2006

Vrsta sudjelovanja
Predavanje

Vrsta recenzije
Međunarodna recenzija

Ključne riječi
Fouling organisms; Artificial substrates; Mineral composition; X-ray diffraction; Apoxyomenos

Sažetak
Benthic organisms that colonize and attach themselves on the natural or artificial substrates in the sea are often called fouling organisms. The attachments differ in style and range in permanence from temporarily simple or multiple muscular attachments (e.g., limpets, octopus), or holdfasts by releasable byssus threads (mussels), by organic glues (some barnacle species), up to permanent whole life cementation (oysters), or boring by chemical or mechanical means (bivalve Lithophaga sp.). Adhesion between the organisms and surfaces is characterized by the extreme complexity and depend on the numerous physical and biological features. One of the most important processes includes the interaction between attached surface and biologically formed minerals. The factors that control these properties are, however, poorly understood and represent a crucial problem in understanding the biomineralization mechanisms of marine organisms. All types of fouling organisms are able to attach themselves to various surfaces, to erode and degrade the surfaces, and in the same time to incorporate some unusual ions from the attached surface and environment in their calcareous structure. The interaction of specific artificial surface with mineral composition of several groups of marine fouling organisms was studied by X-ray powder diffraction. Whole empty bivalve shells, tubes of the serpulid polyhaete worms, calcareous algae and encrusted calcareous structures contained of small parts of several groups of different marine organisms, were collected from the inside and outside surfaces of the antique bronze sculpture of Apoxyomenos found at the depth of 45 m on the Adriatic sea bottom close to Lošinj Island (Croatia) in the 1999. The results showed that calcite and/or aragonite were dominant components in all analyzed samples. In some shell parts and calcareous structures both calcite and magnesium calcite were found. Small amount of mineral feldspar was registered in the shells of boring bivalve Rocellaria dubia and in the tube of serpulid polychaete worm Hydroides elegans. However, beside other components, mineral quartz in traces was found in several parts of the undetermined bivalve shells, in calcareous structure and calcareous algae Pseudolithophyllum expansum. Possible influence of the specific artificial material on the biomineralization processes and mineral components is discussed.

Izvorni jezik
Engleski

Znanstvena područja
Fizika, Geologija, Biologija

POVEZANOST RADA