Jean-Pierre Cuif

Jean-Pierre Cuif
Muséum National d'Histoire Naturelle · Département de Histoire de la Terre (paléontologie)

PhD and Habilitation

About

300
Publications
28,289
Reads
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6,084
Citations
Citations since 2017
35 Research Items
1656 Citations
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2017201820192020202120222023050100150200250300
2017201820192020202120222023050100150200250300
2017201820192020202120222023050100150200250300

Publications

Publications (300)
Conference Paper
PARADOXES DES STRUCTURES CALCAIRES PRODUITES PAR LES INVERTÉBRÉS
Article
Full-text available
In a series of Polynesian pearls collected after short cultivation periods, early post-grafting mineral deposits were characterized by high resolution synchrotron-based X-ray fluorescence with unprecedented accuracy. Morphological patterns and elemental composition are correlated through simultaneous imaging processes. Evidence that aragonite and c...
Article
Full-text available
The calcareous skeletons built by invertebrate organisms share a paradoxical property. Although growing outside the mineralizing cell layers the crystal-like skeleton units exhibit morphologies and three-dimensional arrangements that imply an efficient link between crystallization process and taxonomy. Almost two centuries of investigation led to a...
Article
Resolving Internal Structures and Composition of Biominerals: The Case of Calcitic Prisms of Mollusk Shells - Yannicke Dauphin, Jean-Pierre Cuif, Alain Brunelle, Kadda Medjoubi, Murielle Salomé, Andrea Somogyi
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Full-text available
In the shells of the Pelecypods belonging to the Pinnidae family, the calcareous prismatic units of the outer layer are long-standing references for biomineralization studies. To elucidate how the mechanism of prism formation enables both shell elongation and thickness increase, a top-down structural analysis of these classical “simple prisms” has...
Article
The quality of natural and cultured pearls depends on the size, shape and properties of the surface. The inner structure of the pearl is not known, and not taken into account. Indeed, it is assumed that the cultured pearl is a nucleus covered by a thin organic layer, a thin prismatic layer and a thick nacreous layer. The examination of spherical an...
Article
Cultivated pearls frequently exhibit morphological irregularities making obvious that mineral deposition was irregularly distributed onto nucleus surface. Taking advantage of experimental cultivations with short durations (from 10 days to few months), these irregular deposits predating occurrence of the nacre were investigated in Polynesian pearls...
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Full-text available
A top-down approach to the mineralized structures and developmental steps that can be separated in the shells of Pinctada margaritifera was carried out. Detailed characterizations show that each of the two major layers usually taken into account (the outer prismatic layer and the inner nacreous layer) is actually the result of a complex process dur...
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Full-text available
The prismatic layer of Pinna (Mollusca) is one of the most studied models for the understanding of the biomineralization mechanisms, but our knowledge of the organic components of this layer is limited to the proteins of the soluble organic matrices. The interplay of the mineral and organic matrices is studied using scanning electron and atomic for...
Conference Paper
Full-text available
Tropical ocean­atmosphere interaction plays a key­role for worldwide climate variability. Instrumental observations are available only for the last decades and paleoclimatic reconstruction becomes necessary to recognize decadal and longer changes of the tropical system. Long­live massive corals, developped all around tropical belt, are unique archi...
Article
Full-text available
Mollusc shells are complex organomineral structures, the arrangement and composition depending on the species. Most studies are dedicated to shells composed of an aragonite nacreous and a calcite prismatic layer, so the nacreous prismatic model based on Pinctada and Atrina–Pinna. Here, we studied the micro- and nanostructure, the mineralogy and com...
Article
Among the various defects that contribute to depreciate the commercial value of pearls, the occurrence of depressed rings is the most spectacular. Through a series of structural, physical and chemical characterizations of the pearl layer, this paper reveals that the origin and initial stages of these essentially superficial defects are to be found...
Chapter
Comment les vestiges matériels du passé se sont-ils constitués et conservés au cours du temps, durant des centaines, des milliers, ou des millions d’années? C’est dans cette perspective que se placent les études en taphonomie, largement pluri- et inter-disciplinaires, intégrant de multiples approches scientifiques relevant des sciences de la Terre,...
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Full-text available
Coral skeletons are built by Ca-carbonate (calcite or aragonite) crystals that exhibit distinct morphological patterns and specific spatial arrangements that constitute skeletal microstructures. Additionally, the long-standing recognition that distinct coral species growing in similar conditions are able to record environmental changes with species...
Chapter
Compared to the several hundreds of Families recognized among the Cnidaria phylum, the number of taxa in which a biomineralization process has been developed appears rather restricted. However an in-depth understanding of the resulting hard-parts is of major importance with respect to both evolutionary history of some major components of the phylum...
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Full-text available
Ocean acidification is predicted to impact ecosystems reliant on calcifying organisms, potentially reducing the socioeconomic benefits these habitats provide. Here we investigate the acclimation potential of stony corals living along a pH gradient caused by a Mediterranean CO2 vent that serves as a natural long-term experimental setting. We show th...
Article
Scleractinian corals are a major source of biogenic calcium carbonate, yet the relationship between their skeletal microstructure and mechanical properties has been scarcely studied. In this work, the skeletons of two coral species: solitary Balanophyllia europaea and colonial Stylophora pistillata, were investigated by nanoindentation. The hardnes...
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Full-text available
Consistently classified among the references for calcite simple prisms, the microstructural units that form the outer layer of the Pinctada margaritifera have been investigated through a series of morphological, crystallographical and biochemical characterizations. It is often said that the polygonal transverse shape of the prisms result from the c...
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Full-text available
Consistently classified among the references for calcite simple prisms, the microstructural units that form the outer layer of the Pinctada margaritifera have been investigated through a series of morphological, crystallographical and biochemical characterizations. It is often said that the polygonal transverse shape of the prisms result from the c...
Article
The precipitation of calcium carbonate was carried out in the presence of the intraskeletal organic matrix (OM) extracted from Mediterranean corals. They were diverse in growth form and trophic strategy, Balanophyllia europaea and Leptopsammia pruvoti-solitary corals, only the first zooxanthellate coral-and Cladocora caespitosa and Astroides calycu...
Article
The two layers of the shell of a living fossil, Neotrigonia, were examined using optical, electron and atomic-force microscopies. Nacre and prisms are composed of complex acicular crystallites. These crystallites are heterogeneous and composed of rounded granules surrounded by a thin cortex. Despite both layers being aragonite, the chemical composi...
Article
Full-text available
Mineralization in pearls is used as a 'study model' to understand basic mechanisms of calcium carbonate biomineralization. In addition to nacre formation, vaterite and calcite can be found in pearls, with the occurrence of calcite being the least studied. In this study, two calcite microstructures, prisms and “pseudo-prisms”, are described. Electro...
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Full-text available
Species of Haliotis (abalone) show high variety in structure and mineralogy of the shell. One of the European species (Haliotis tuberculata) in particular has an unusual shell structure in which calcite and aragonite coexist at a microscale with small patches of aragonite embedded in larger calcitic zones. A detailed examination of the boundary bet...
Article
Organic compounds have been extracted from calcium carbonate skeletons produced by three invertebrate species belonging to distinct phyla. The soluble parts of these skeleton matrices were isolated and analysed by synchrotron-based X-ray spectroscopy (XPS). The presence of calcium associated with these organic materials was revealed in every sample...
Article
Scleractinian coral skeletons are composed mainly of aragonite in which a small percentage of organic matrix (OM) molecules is entrapped. It is well known that in corals the mineral deposition occurs in a biological confined nucleation site, but it is still unclear to what extent the calcification is controlled by OM molecules. Hence, the shape, si...
Article
More than sixty years ago, H.C. Wang carried out an extensive study of skeletal microstructures of the Paleozoic corals and concluded that a “direct descent” may have existed between the two coral suborders: the Paleozoic Rugosa and the younger Scleractinia that had been established as distinct phyla by Haeckel (1896). Skeletal microstructures and...
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Nerita undata is a marine gastropod, the shell of which consists of an external layer composed of very fine, long and undulating calcite prisms, and of an internal aragonite crossed-lamellar layer. As for any Ca-carbonate shell, both layers are composite materials, resulting from the sub-micrometric association of organic macromolecules with the mi...
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Full-text available
Y.D.); julius.nouet@u-psud.fr (J.N.) Abstract: In several recent models of invertebrate skeletogenesis, Ca-carbonate crystallization occurs within a liquid-filled chamber. No explanation is given neither for the simultaneous occurrence of distinct polymorphs of Ca-carbonate within these liquid volumes, nor for the spatial arrangement of the mineral...
Article
Cultivation of commercial oysters is now facing the possible influence of global change in sea water composition, commonly referred to as "ocean acidification". In order to test the potential consequence of the predicted environmental changes, a cultivation experiment was carried out. The left and right valves of the oyster shell Crassostrea gigas...
Article
Mollusc shells are composed of two or three layers. The main layers are well-studied, but the structural and chemical changes at their boundaries are usually neglected. A microstructural, mineralogical, and biochemical study of the boundary between the inner crossed lamellar and outer prismatic layers of the shell of Concholepas concholepas showed...
Article
Pinctada margaritifera mollusc is cultivated in French Polynesia for the production of black pearls. For this study, the colour of juvenile samples (48 days old) was investigated in the visible range spectra (430-700 nm) using spectrophotometry. A first measurement was done with the soft parts still inside the shell (entire animal). Then, the soft...
Article
A series of physical characterization methods (UV fluorescence microscopy, X-ray microdiffraction, backscattered electron imaging and X-ray absorption spectroscopy) were applied to Polynesian pearls collected after different cultivation periods, varying from three weeks to eighteen months. Through this rigorous time-based sampling, 120 pearls produ...
Article
The nacre–prism transition of the mollusc shell Pinctada margaritifera was studied using scanning electron microscopy, electron probe micro-analysis (EPMA) and time-of-flight secondary ion mass spectrometry (TOF-SIMS). Mineralogical change is correlated with a change in organic matrix. Previous analyses had shown that sugars were involved in the tr...
Article
Electron backscatter diffraction (EBSD) is a microscopy technique that reveals in situ crystallographic information. Currently, it is widely used for the characterization of geological materials and in studies of biomineralization. Here, we analyze high resolution EBSD data from biogenic calcite in two mollusk taxa, Concholepas and Haliotis, previo...
Article
Marine mollusc shell growth has been widely measured using fluorochrome marking. In order to test the efficiency and reliability of calcein staining on Pinctada margaritifera shells and pearls, the present study examined two administration methods, different concentrations and several immersion times. Immersion in a 150 mg L−1 calcein solution for...
Article
Dissolved boron in modern seawater occurs in the form of two species, trigonal boric acid B(OH)3 and tetrahedral borate ion . One of the key assumption in the use of boron isotopic compositions of carbonates as pH proxy is that only borate ions, , are incorporated into the carbonate. Here, we investigate the speciation of boron in deep-sea coral mi...
Book
Fossils are essential to the reconstruction of the evolution of life and episodes in Earth history. Knowledge of biomineralization - the processes associated with the formation of mineralized biological structures - is essential to properly evaluate data derived from fossils. This book emphasizes skeletal formation and fossilization in a geologic f...
Conference Paper
Corals are often used in paleoceanographic studies in order to reconstruct past seawater environmental parameters, e.g. temperature, salinity, past ocean circulation. However coral isotopic and elemental ratios exhibit some vital effects. Deep-sea corals (DSC), as they grow in stable environment, are perfect for studying the biomineralisation proce...
Article
During the last three decades, a series of paleontological and biological results have brought considerable changes to the long-standing question of a possible relationship between the Paleozoic and modern corals. Microstructural descriptions of samples from the alpine outcrops (Salzkammergut and Dolomites) along with new specimens from Turkey have...
Article
Coral skeletons are composite acellular structures, in which organic macromolecules are intimately associated with mineral phases. Previous studies focussed on proteins and sugars of the soluble organic matrices extracted from the skeletons. Here we report the occurrence of diverse lipids which were extracted from the aragonitic skeletons of seven...
Article
Recently, with the acceptance of scientific development view in our country's economic construction, the environmental protection construction of urban road tunnel attracts all parties' attention increasingly. The environmental protection problem and its harm of urban road tunnel in construction stage are discussed from four aspects: engineering sp...
Article
The deep-sea coral, Enallopsammia rostrata, a member of the Dendrophylliidae family, is a major structure-forming species that creates massive dendroid colonies, up to 1 m wide and 0.5 m tall. Living colonies of E. rostrata have been collected using the PISCES submersibles from three locations from 480 to 788 m water depth in the Line Islands (∼160...
Article
We present ion microprobe measurements of oxygen isotopic compositions in the deep-sea coral Lophelia pertusa. Compared to bulk skeletal aragonite fibres, the EMZ (early mineralization zone), near the inside of the calyx, was systematically depleted in 18O. Rayleigh fractionation from a semi-closed fluid reservoir does not explain this and other ge...
Article
The organic interprismatic layers of the mollusc Pinctada margaritifera are studied using a variety of highly spatially-resolved techniques to establish their composition and structure. Our results show that both the interlamellar sheets of the nacre and interprismatic envelopes form layered structures. Additionally, these organic layers are neithe...
Article
In order to identify vital effect on oxygen isotopic ratio, we analyzed at micrometer size scale skeleton microstructures of a scleractinian coral Acropora, cultured under constant conditions. Measurements focused on the two crystalline units highlighted different isotopic signatures. Massive crystals (centers of calcification: COC) exhibit quasi-c...
Conference Paper
Full-text available
The main components of Mollusc shells are carbonate minerals: calcite and aragonite. ACC is present in larval stages. Calcite and aragonite can be secreted simultaneously by the mantle. Despite the small number of varieties, the arrangement of the mineral components is diverse, and dependant upon the taxonomy. They are also associated with organic...
Article
Full-text available
We present first results of a long-term effort to label calcium carbonates formed by marine organisms with stable isotopes to obtain information about the dynamics of the biomineralization processes. The skeleton of the scleractinian coral Porites porites was labeled three times with enhanced concentrations of 86Sr. The distribution of 86Sr in the...
Article
Full-text available
Variations on chemical composition in fossil biogenic carbonates, and in particular of mollusk shells, have been used in a range of palaeoenvironmental reconstructions. Therefore, it is of primary importance to detect and understand the diagenetic processes that may modify the original chemical signature. This microstructural and biogeochemical stu...
Article
Full-text available
Corals are widely distributed throughout a long stretch of geological time and can provide high-resolution histories of climatic variabilities in the tropics, which play a key role in understanding the Earth's climate system. Geochemical approaches to corals have been widely used for reconstructing palaeoclimates because the geochemistry of the ske...
Article
A series of Polynesian pearls has been investigated with particular attention to the structural and compositional patterns of the early developmental stages of the pearl layer. These initial steps in pearl formation bear witness of the metabolic changes that have occurred during the pearl-sac formation. The resulting structurally and biochemically...
Article
The shells of rhynchonelliform brachiopods have an outer (primary) layer of acicular calcite and an inner (secondary) layer of calcite fibres which are parallel to the shell exterior. Atomic force microscopy (AFM) reveals that these fibres are composed of large triangular nanogranules of about 600-650 nm along their long axis. The nanogranules are...
Article
Full-text available
The aim of the present work was to compare microstructure in strong and weak scallop Pecten maximus shells of cultured and wild origin using observations from scanning electron microscopy (SEM) and atomic force microscopy (AFM). The scallops representing the strongest and the weakest shells from each origin and age were selected for the microstruct...