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Datasets with PANGAEA technical keyword @tahiti310pc

Mostrando recursos 1 - 20 de 41

  1. Microbialites and lipid biomarker from coral reefs off the volcanic islands Tahiti and Vanuatu and from the nonvolcanic sites Belize and the Maldives

    Heindel, Katrin; Birgel, Daniel; Brunner, Benjamin; Thiel, Volker; Westphal, Hildegard; Gischler, Eberhard; Ziegenbalg, Simone B; Cabioch, Guy; Sjovall, Peter; Peckmann, Jörn Ludwig
    The occurrence of microbialites in post-glacial coral reefs has been interpreted to reflect an ecosystem response to environmental change. The greater thickness of microbialites in reefs with a volcanic hinterland compared to thinner microbial crusts in reefs with a non-volcanic hinterland led to the suggestion that fertilization of the reefal environment by chemical weathering of volcanic rocks stimulated primary productivity and microbialite formation. Using a molecular and isotopic approach on reef-microbialites from Tahiti (Pacific Ocean), it was recently shown that sulfate-reducing bacteria favored the formation of microbial carbonates. To test if similar mechanisms induced microbialite formation in other reefs as...

  2. (Table 2) Contents of lipid biomarkers derived from sulfate-reducing bacteria and their compound-specific carbon isotopic values

    Heindel, Katrin; Birgel, Daniel; Brunner, Benjamin; Thiel, Volker; Westphal, Hildegard; Gischler, Eberhard; Ziegenbalg, Simone B; Cabioch, Guy; Sjovall, Peter; Peckmann, Jörn Ludwig

  3. (Table 1) Microbialites from coral reefs off the volcanic islands Tahiti and Vanuatu and from the nonvolcanic sites Belize and the Maldives

    Heindel, Katrin; Birgel, Daniel; Brunner, Benjamin; Thiel, Volker; Westphal, Hildegard; Gischler, Eberhard; Ziegenbalg, Simone B; Cabioch, Guy; Sjovall, Peter; Peckmann, Jörn Ludwig

  4. Calcium isotope fractionation in cultured, modern and fossil scleractinian coral skeleton

    Pretet, Chloé; Samankassou, Elias; Felis, Thomas; Reynaud, Stéphanie; Böhm, Florian; Eisenhauer, Anton; Ferrier-Pagès, Christine; Gattuso, Jean-Pierre; Camoin, Gilbert
    The present study investigates the influence of environmental (temperature, salinity) and biological (growth rate, inter-generic variations) parameters on calcium isotope fractionation (d44/40Ca) in scleractinian coral skeleton to better constrain this record. Previous studies focused on the d44/40Ca record in different marine organisms to reconstruct seawater composition or temperature, but only few studies investigated corals. This study presents measurements performed on modern corals from natural environments (from the Maldives for modern and from Tahiti for fossil corals) as well as from laboratory cultures (Centre Scientifique de Monaco). Measurements on Porites sp., Acropora sp., Montipora verrucosa and Stylophora pistillata allow constraining inter-generic variability. Our...

  5. (Table 1) Calcium isotope values of fossil Porites sp. from IODP Hole 310-M0018A, Tahiti

    Pretet, Chloé; Samankassou, Elias; Felis, Thomas; Reynaud, Stéphanie; Böhm, Florian; Eisenhauer, Anton; Ferrier-Pagès, Christine; Gattuso, Jean-Pierre; Camoin, Gilbert

  6. (Table A1) Uranium and Thorium determination from IODP Site 310-M0007B

    DeLong, Kristine; Quinn, Terrence Michael; Shen, Chuan Chou; Lin, Ke
    The Integrated Ocean Drilling Program (IODP) Expedition 310 recovered drill cores from the drowned reefs around the island of Tahiti (17°40'S, 149°30'W), many of which contained samples of massive corals from the genus Porites. Herein we report on one well-preserved fossil coral sample: a 13.6 cm long Porites sp. dated by uranium series techniques at 9523 ± 33 years. Monthly delta18O and Sr/Ca determinations reveal nine clear and robust annual cycles. Coral delta18O and Sr/Ca determinations estimate a mean temperature of ca. 24.3°C (ca. 3.2°C colder than modern) for Tahiti at 9.5 ka; however, this estimate is viewed with caution...

  7. (Table 1) Different age analysis from IODP Site 310-M0018A

    Westphal, Hildegard; Heindel, Katrin; Brandano, M; Peckmann, Jörn Ludwig
    Deglacial reefs from Tahiti (IODP 310) feature a co-occurrence of zooxanthellate corals with microbialites that compose up to 80 vol% of the reef framework. The notion that microbialites tend to form in more nutrient-rich environments has previously led to the concept that such encrustations are considerably younger than the coral framework, and that they have formed in deeper storeys of the reef edifice, or that they represent severe disturbances of the reef ecosystem. As indicated by their repetitive interbedding with coralline red algae, the microbialites of this reef succession of Tahiti, however, formed immediately after coral growth under photic conditions....

  8. Nongeniculate coralline algae from IODP Site 310-M0005D

    Iryu, Yasufumi; Takahashi, Yasunari; Fujita, Kazuhiko; Camoin, Gilbert; Cabioch, Guy; Matsuda, Hiroki; Sato, Tokiyuki; Sugihara, Kaoru; Webster, Jody M; Westphal, Hildegard
    Material cored during the Integrated Ocean Drilling Program (IODP) Expedition 310 'Tahiti Sea Level' revealed that the fossil reef systems around Tahiti are composed of two major stratigraphic sequences: (i) a last deglacial sequence; and (ii) an older Pleistocene sequence. The older Pleistocene carbonate sequence is composed of reef deposits associated with volcaniclastic sediments and was preserved in Hole 310-M0005D drilled off Maraa. Within an approximately 70-m-thick older Pleistocene sequence (33.22-101.93 m below seafloor; 92.85-161.56 m below present sealevel) in this hole, 11 depositional units are defined by lithological changes, sedimentological features, and paleontological characteristics and are numbered sequentially from...

  9. Elemental contents, non-carbonate, fatty acids and alcohols analysis from different Holes of IODP Expedition 310

    Heindel, Katrin; Birgel, Daniel; Peckmann, Jörn Ludwig; Kuhnert, Henning; Westphal, Hildegard
    During IODP Expedition 310 (Tahiti Sea Level), drowned Pleistocene-Holocene barrier-reef terraces were drilled on the slope of the volcanic island. The deglacial reef succession typically consists of a coral framework encrusted by coralline algae and later by microbialites; the latter make up < 80% of the rock volume. Lipid biomarkers were analyzed in order to identify organisms involved in reef-microbialite formation at Tahiti, as the genesis of deglacial microbialites and the conditions favoring their formation are not fully understood. Sterols plus saturated and monounsaturated short-chain fatty acids predominantly derived from both marine primary producers (algae) and bacteria comprise 44 wt%...

  10. (Supplement 1) All detected fatty acids and their compound-specific carbon isotopic values from different Holes of IODP Expedition 310

    Heindel, Katrin; Birgel, Daniel; Peckmann, Jörn Ludwig; Kuhnert, Henning; Westphal, Hildegard

  11. (Table 4) Fatty acids and alcohols analysis and their compound-specific carbon isotopic values from different Holes of IODP Expedition 310

    Heindel, Katrin; Birgel, Daniel; Peckmann, Jörn Ludwig; Kuhnert, Henning; Westphal, Hildegard

  12. (Supplement 3) Lipid- and group-specific proportions and their mean compound-specific carbon isotopic values from different Holes of IODP Expedition 310

    Heindel, Katrin; Birgel, Daniel; Peckmann, Jörn Ludwig; Kuhnert, Henning; Westphal, Hildegard

  13. (Supplement 2) All detected alcohols and their compound-specific carbon isotopic values from different Holes of IODP Expedition 310

    Heindel, Katrin; Birgel, Daniel; Peckmann, Jörn Ludwig; Kuhnert, Henning; Westphal, Hildegard

  14. (Table 3) Analysis of non-carbonate fractions from different Holes of IODP Expedition 310

    Heindel, Katrin; Birgel, Daniel; Peckmann, Jörn Ludwig; Kuhnert, Henning; Westphal, Hildegard

  15. (Table 2) Elemental contents expressed as ratios versus Ca from different Holes of IODP Expedition 310

    Heindel, Katrin; Birgel, Daniel; Peckmann, Jörn Ludwig; Kuhnert, Henning; Westphal, Hildegard

  16. (Table 1) Growth patterns of microbialites, water depths and applied methods from different Holes of IODP Expedition 310

    Heindel, Katrin; Birgel, Daniel; Peckmann, Jörn Ludwig; Kuhnert, Henning; Westphal, Hildegard

  17. Age analysis and stratigraphical position from different Holes of IODP Expedition 310

    Heindel, Katrin; Wisshak, Max; Westphal, Hildegard
    The main motivation for Integrated Ocean Drilling Program Expedition 310 to the Tahitian Archipelago was the assumption that the last deglacial sea-level rise is precisely recorded in the coral reefs of this far-field site. The Tahitian deglacial succession typically consists of coral framework subsequently encrusted by coralline algae and microbialites. The high abundance of microbialites is uncommon for shallow-water coral reefs, and the environmental conditions favouring their development are still poorly understood. Microbioerosion patterns in the three principal framework components (corals, coralline algae, microbialites) are studied with respect to relative light availability during coral growth and subsequent encrustation, in order...

  18. (Table 3) Different age analysis from different Holes of IODP Expedition 310

    Heindel, Katrin; Wisshak, Max; Westphal, Hildegard

  19. (Table 2) Water depths and the stratigraphical position from different Holes of IODP Expedition 310

    Heindel, Katrin; Wisshak, Max; Westphal, Hildegard

  20. (Appendix 1) Coral analysis and isostatic rebound effects from different Holes of IODP Expedition 310

    Deschamps, Pierre; Durand, Nicolas; Bard, Édouard; Hamelin, Bruno; Camoin, Gilbert; Thomas, Alexander L; Henderson, Gideon M; Okuno, Junichi; Yokoyama, Yusuke
    Past sea-level records provide invaluable information about the response of ice sheets to climate forcing. Some such records suggest that the last deglaciation was punctuated by a dramatic period of sea-level rise, of about 20 metres, in less than 500 years. Controversy about the amplitude and timing of this meltwater pulse (MWP-1A) has, however, led to uncertainty about the source of the melt water and its temporal and causal relationships with the abrupt climate changes of the deglaciation. Here we show that MWP-1A started no earlier than 14,650 years ago and ended before 14,310 years ago, making it coeval with...

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