Geochemical and Crystallographic Study of Turbo Torquatus (Mollusca: Gastropoda) From Southwestern Australia
MetadataShow full item record
© 2017. American Geophysical Union. All Rights Reserved. Shells of the marine gastropod Turbo torquatus were sampled from three different locations along the Western Australian coastline, namely Marmion Lagoon (31°S), Rottnest Island (32°S), and Hamelin Bay (34°S). Marmion Lagoon and Rottnest Island have similar sea surface temperature ranges that are ~1°C warmer than Hamelin Bay, with all sites influenced by the warm southward flowing Leeuwin Current. The shells were characterized using crystallographic, spectroscopic, and geochemical analyses. Shell mineral composition varies between the three sites suggesting the influence of sea surface temperature, oxygen consumption, and/or bedrock composition on shell mineralogy and preferential incorporation and/or elemental discrimination of Mg, P, and S. Furthermore, T. torquatus was found to exert control over the incorporation of most, if not all, the elements measured here, suggesting strong biological regulation. At all levels of testing, the concentrations of Li varied significantly, which indicates that this trace element may not be a suitable environmental proxy. Variation in Sr concentration between sites and between specimens reflects combined environmental and biological controls suggesting that Sr/Ca ratios in T. torquatus cannot be used to estimate sea surface temperature without experimentally accounting for metabolic and growth effects. The mineral composition and microstructure of T. torquatus shells may help identify sea surface temperature variations on geological time scales. These findings support the previously hypothesized involvement of an active selective pathway across the calcifying mantle of T. torquatus for most, if not all, the elements measured here.
Showing items related by title, author, creator and subject.
Adsorption of the aurocyanide, Au (CN)2 - complex on granular activated carbons derived from macadamia nut shells: A preliminary studyPoinern, G.; Senanayake, G.; Shah, N.; Thi-Le, X.; Parkinson, Gordon; Fawcett, D. (2011)In this study, waste macadamia nut shells were investigated for potential use as a hard organic precursor for the production of a granular activated carbon material. The processing of the macadamia shells commenced with ...
Nizamuddin, S.; Jayakumar, N.; Sahu, J.; Ganesan, P.; Bhutto, A.; Mujawar, Mubarak (2015)© 2015, Korean Institute of Chemical Engineers, Seoul, Korea. Palm shell is one of the most plentiful wastes of the palm oil mill industry. This study identifies the capability of hydrothermal carbonization process (HTC) ...
Synthesis and characterization of hydrochars produced by hydrothermal carbonization of oil palm shellNizamuddin, S.; Jaya Kumar, N.; Sahu, J.; Ganesan, P.; Mujawar, Mubarak; Mazari, S. (2015)Biomass is a renewable and environmental-friendly energy source to fulfill future energy demands in the form of biofuels. Oil palm biomass is an agricultural waste product produced in large quantities in Malaysia and ...