Significance of abrasion patterns in Recent pectinoid bivalve shells

2021 ◽  
Author(s):  
Michael R.W. Amler ◽  
Julia C. Friedel ◽  
Patrick Wollenweber
Keyword(s):  
Bivalve Shells

Bivalve shells (Corbula trigona) as a new adsorbent for the defluoridation of groundwater by adsorption-precipitation

2021 ◽  
pp. 1-11
Author(s):  
N’Zébo Sylvestre Yapo ◽  
Bi Gouessé Henri Briton ◽  
Sadat Aw ◽  
Laurence Reinert ◽  
Patrick Drogui ◽  
...  
Keyword(s):  
Bivalve Shells

scholarly journals Clumped isotope thermometry in bivalve shells: A tool for reconstructing seasonal upwelling

2021 ◽  
Vol 294 ◽  
pp. 174-191
Author(s):  
Diana E. Caldarescu ◽  
Henrik Sadatzki ◽  
Carin Andersson ◽  
Priska Schäfer ◽  
Helena Fortunato ◽  
...  
Keyword(s):  
Clumped Isotope ◽  
Bivalve Shells

scholarly journals Absolute seasonal temperature estimates from clumped isotopes in bivalve shells suggest warm and variable greenhouse climate

2021 ◽  
Vol 2 (1) ◽  
Author(s):  
Niels J. de Winter ◽  
Inigo A. Müller ◽  
Ilja J. Kocken ◽  
Nicolas Thibault ◽  
Clemens V. Ullmann ◽  
...  
Keyword(s):  
Seasonal Variability ◽  
Sea Water ◽  
Isotope Composition ◽  
Sea Surface ◽  
Mean Annual Temperature ◽  
Seasonal Temperature ◽  
Sea Surface Temperatures ◽  
Surface Temperatures ◽  
Temperature Reconstructions ◽  
Bivalve Shells

AbstractSeasonal variability in sea surface temperatures plays a fundamental role in climate dynamics and species distribution. Seasonal bias can also severely compromise the accuracy of mean annual temperature reconstructions. It is therefore essential to better understand seasonal variability in climates of the past. Many reconstructions of climate in deep time neglect this issue and rely on controversial assumptions, such as estimates of sea water oxygen isotope composition. Here we present absolute seasonal temperature reconstructions based on clumped isotope measurements in bivalve shells which, critically, do not rely on these assumptions. We reconstruct highly precise monthly sea surface temperatures at around 50 °N latitude from individual oyster and rudist shells of the Campanian greenhouse period about 78 million years ago, when the seasonal range at 50 °N comprised 15 to 27 °C. In agreement with fully coupled climate model simulations, we find that greenhouse climates outside the tropics were warmer and more seasonal than previously thought. We conclude that seasonal bias and assumptions about seawater composition can distort temperature reconstructions and our understanding of past greenhouse climates.

scholarly journals Does carbonate-associated sulphate record nutrition in lucinid and thyasirid bivalve shells from modern hydrocarbon seeps?

2018 ◽  
Vol 84 (2) ◽  
pp. 170-174 ◽  
Author(s):  
Robert J Newton ◽  
Crispin T S Little ◽  
Edine Pape ◽  
Fiona Gill ◽  
Clara F Rodrigues ◽  
...  
Keyword(s):  
Hydrocarbon Seeps ◽  
Bivalve Shells

scholarly journals Geochemical and microstructural characterisation of two species of cool-water bivalves (<i>Fulvia tenuicostata</i> and <i>Soletellina biradiata</i>) from Western Australia

2017 ◽  
Vol 14 (6) ◽  
pp. 1721-1737 ◽  
Author(s):  
Liza M. Roger ◽  
Annette D. George ◽  
Jeremy Shaw ◽  
Robert D. Hart ◽  
Malcolm Roberts ◽  
...  
Keyword(s):  
Western Australia ◽  
Inductively Coupled Plasma ◽  
Organic Matrix ◽  
Analysis Data ◽  
Xrd Analysis ◽  
Crystallographic Structure ◽  
Marine Bivalve ◽  
Ionic Substitution ◽  
Species Specific ◽  
Bivalve Shells

Abstract. The shells of two marine bivalve species (Fulvia tenuicostata and Soletellina biradiata) endemic to south Western Australia have been characterised using a combined crystallographic, spectroscopic and geochemical approach. Both species have been described previously as purely aragonitic; however, this study identified the presence of three phases, namely aragonite, calcite and Mg-calcite, using XRD analysis. Data obtained via confocal Raman spectroscopy, electron probe microanalysis and laser ablation inductively coupled plasma mass spectrometry (LA-ICP-MS) show correlations between Mg ∕ S and Mg ∕ P in F. tenuicostata and between Sr ∕ S and S ∕ Ba in S. biradiata. The composition of the organic macromolecules that constitute the shell organic matrix (i.e. the soluble phosphorus-dominated and/or insoluble sulfur-dominated fraction) influences the incorporation of Mg, Sr and Ba into the crystal lattice. Ionic substitution, particularly Ca2+ by Mg2+ in calcite in F. tenuicostata, appears to have been promoted by the combination of both S- and P-dominated organic macromolecules. The elemental composition of these two marine bivalve shells is species specific and influenced by many factors, such as crystallographic structure, organic macromolecule composition and environmental setting. In order to reliably use bivalve shells as proxies for paleoenvironmental reconstructions, both the organic and inorganic crystalline material need to be characterised to account for all influencing factors and accurately describe the vital effect.

scholarly journals Measurement of Pollution Levels Caused by Heavy Metals of Vanadium, Nickel, Lead and Copper Using Bivalve Shells of Timoclea imbricata Species On Bahrakan Coast in Spring 2013

2014 ◽  
Vol 6 (4) ◽  
Author(s):  
Seyyedeh Marzieh Moosavian ◽  
Seyyed Mohammad Baghernabavi ◽  
Elahe Zallaghi ◽  
Maryam Mohammadi Rouzbahani ◽  
Elham Hosseini Panah ◽  
...  
Keyword(s):  
Heavy Metals ◽  
Pollution Levels ◽  
Nickel Lead ◽  
Bivalve Shells

scholarly journals Paleotemperature and paleosalinity evolution across Eocene-Oligocene Transition in North Atlantic Ocean: Insights from geochemical analysis of bivalve shells.

2020 ◽  
Author(s):  
Justine Briard ◽  
Marc de Rafélis ◽  
Emmanuelle Vennin ◽  
Mathieu Daëron ◽  
Valérie Chavagnac ◽  
...  
Keyword(s):  
Atlantic Ocean ◽  
Sea Level ◽  
Environmental Changes ◽  
North Atlantic Ocean ◽  
Global Climate ◽  
Ice Sheet ◽  
Major Step ◽  
Mode Identification ◽  
Global Climate Changes ◽  
Bivalve Shells

&lt;p&gt;The Cenozoic period encompasses the last transition from the &amp;#8220;greenhouse&amp;#8221; climate of the late Early Eocene (~50 Ma) to our modern &amp;#8220;icehouse&amp;#8221; climate with its much lower CO&lt;sub&gt;2&lt;/sub&gt; levels, significant polar glaciation and major sea level drop. The Eocene-Oligocene transition (EOT), that marks the first major ice-sheet build-up on Antarctica, has been extensively studied as it represents the entrance into an icehouse mode. Identification of this major step of Antarctic ice-sheet build-up strongly relies on &amp;#948;&lt;sup&gt;18&lt;/sup&gt;O and Mg/Ca benthic foraminifera records from ODP / DSDP sites. By contrast, few records currently exist from coastal environments despite the presence of abundant fossil archives, like bivalve shells. Yet palaeoenvironmental records from these peculiar coastal sites could bring information on how they react to global climate changes and help to further understand the behavior of our climate system. In this study, we applied a multi-proxy strategy coupling &amp;#948;&lt;sup&gt;18&lt;/sup&gt;O, &amp;#948;&lt;sup&gt;13&lt;/sup&gt;C, clumped isotopes (&amp;#916;&lt;sub&gt;47&lt;/sub&gt;), strontium isotopes (&lt;sup&gt;87&lt;/sup&gt;Sr/&lt;sup&gt;86&lt;/sup&gt;Sr) analyses on aragonitic and calcitic bivalves and sediments recovered from the Isle of Wight (London-Paris Basin, Northeastern Atlantic Ocean) to provide additional constrain on environmental changes in this region across the Eocene-Oligocene Transition (~37.8&amp;#8211;33 Ma).&lt;/p&gt;&lt;p&gt;Our new coupled &amp;#948;&lt;sup&gt;18&lt;/sup&gt;O and &amp;#916;&lt;sub&gt;47 &lt;/sub&gt;dataset highlights a marked decrease in local seawater temperatures (~ 8&amp;#176;C) coupled to a drop in local seawater &amp;#948;&lt;sup&gt;18&lt;/sup&gt;O, likely linked to the sea level drop associated with ice-cap formation and an evolution toward more proximal, brackish environment in this region (that is apparent from sediment facies evolution). We estimate the salinity decrease recorded at the local scale from the Eocene to the Oligocene as reaching about 6 PSU, from 31 to 25 PSU. Strontium isotope analyses of the bivalves support this interpretation, showing values close to that of seawater up to the EOT but a marked deviation from contemporaneous global seawater &lt;sup&gt;87&lt;/sup&gt;Sr/&lt;sup&gt;86&lt;/sup&gt;Sr values toward more radiogenic values afterward. This positive deviation is in agreement with an evolution toward more proximal environments, subjected to larger freshwater inputs.&lt;/p&gt;

scholarly journals Spondylus and Glycymeris bracelets: trade reflections at Neolithic Vinča-Belo Brdo

2006 ◽  
Vol 33 ◽  
pp. 237-252 ◽  
Author(s):  
Vesna Dimitrijević ◽  
Boban Tripković
Keyword(s):  
Common Type ◽  
Shell Morphology ◽  
Marine Shell ◽  
Bivalve Shells

In the provision, production and exchange of prestigious items and materials in prehistoric Europe, marine shell ornaments play important role. The marine shell collection at the Vinča-Belo Brdo site is the largest in the central and northern Balkans. More than 300 ornament items manufactured from marine shells have been collected since the first excavations in 1908 up until the most recent campaign. The majority of ornaments were made using recent shells that were obtained through trade with contemporaneous Neolithic communities; few ornaments were made of fossil bivalve shells. Bracelets were the most common type. Two bivalve genera, Spondylus and Glycymeris, were used in their production. These are easily recognizable when complete valves are compared, but difficult to distinguish in highly modified items where shell morphology is obscured. The defining characteristics for shell identification are presented, particularly to differentiate ornaments manufactured from the Spondylus and Glycymeris genera, as well as those made of recent and fossil shells. The possible exchange routes for these are discussed, as well as their diachronic distribution at the Vinča site.

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