Search Results - "Hemleben, Christoph"

Geographical distribution of cryptic genetic types in the planktonic foraminifer Globigerinoides ruber by AURAHS, RALF, GRIMM, GUIDO W., HEMLEBEN, VERA, HEMLEBEN, CHRISTOPH, KUCERA, MICHAL

“…We present SSU rDNA data resolving the seasonal and geographical distribution of ‘cryptic’ genetic types of the planktonic foraminifer morphospecies…”
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High-resolution carbon isotope records of the Aptian to Lower Albian from SE France and the Mazagan Plateau (DSDP Site 545): a stratigraphic tool for paleoceanographic and paleobiologic reconstruction by Herrle, Jens O., Kößler, Peter, Friedrich, Oliver, Erlenkeuser, Helmut, Hemleben, Christoph

“…High-resolution carbon isotope stratigraphy is established for the Aptian to Lower Albian of the Vocontian Basin (SE France), and correlated to the carbon…”
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Clay minerals in late glacial and Holocene sediments of the northern and southern Aegean Sea by Ehrmann, Werner, Schmiedl, Gerhard, Hamann, Yvonne, Kuhnt, Tanja, Hemleben, Christoph, Siebel, Wolfgang

“…Different source areas, oceanography and climate regimes influenced the clay mineral assemblages and grain size distribution of two sediment cores from the…”
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Forcing mechanisms for mid-Cretaceous black shale formation: evidence from the Upper Aptian and Lower Albian of the Vocontian Basin (SE France) by Herrle, Jens O, Pross, Jörg, Friedrich, Oliver, Kößler, Peter, Hemleben, Christoph

“…Calcareous nannoplankton, palynomorph, benthic foraminifera, and oxygen isotope records from the supraregionally distributed Niveau Paquier (Early Albian age,…”
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Deep-sea ecosystem variability of the Aegean Sea during the past 22 kyr as revealed by Benthic Foraminifera by Kuhnt, Tanja, Schmiedl, Gerhard, Ehrmann, Werner, Hamann, Yvonne, Hemleben, Christoph

“…Specific responses of the regional deep-sea ecosystems to climatic and oceanographic processes during the last 22 kyr are revealed by benthic foraminiferal…”
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Assessing the reliability of magnesium in foraminiferal calcite as a proxy for water mass temperatures by Nürnberg, Dirk, Bijma, Jelle, Hemleben, Christoph

“…Though many studies on the Mg contents in the calcitic tests of foraminifers exist, the processes controlling its uptake are still a matter of debate…”
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Environmental and biological effects on the stable isotope composition of recent deep-sea benthic foraminifera from the western Mediterranean Sea by Schmiedl, Gerhard, Pfeilsticker, Martin, Hemleben, Christoph, Mackensen, Andreas

“…The influence of microhabitat, organic matter flux, and metabolism on the stable oxygen and carbon isotope composition of live (Rose Bengal stained) and dead…”
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Reconstruction of short-term palaeoceanographic changes during the formation of the late Albian "Niveau Breistroffer" black shales (oceanic anoxic event 1d, SE France) by Bornemann, André, Pross, Jörg, Reichelt, Kerstin, Herrle, Jens O, Hemleben, Christoph, Mutterlose, Jörg

“…The Niveau Breistroffer black shale succession in the Vocontian Basin (SE France) is the regional equivalent of the widely distributed Late Albian Oceanic…”
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Planktic foraminiferal production stimulated by chlorophyll redistribution and entrainment of nutrients by Schiebel, Ralf, Waniek, Joanna, Bork, Matthias, Hemleben, Christoph

“…During September and October 1996 planktic foraminifers and pteropods were sampled from the upper 2500 m of the water column in the BIOTRANS area (47°N, 20°W),…”
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Interannual variability of planktic foraminiferal populations and test flux in the eastern North Atlantic Ocean (JGOFS) by Schiebel, Ralf, Hemleben, Christoph

“…Planktic foraminiferal assemblages vary in response to seasonal fluctuations of hydrographic properties, between water masses, and after periodical changes and…”
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Symbiont bleaching in fossil planktonic foraminifera by Wade, Bridget S, Al-Sabouni, Nadia, Hemleben, Christoph, Kroon, Dick

“…Size restricted carbon isotopes (δ¹³C) are used to track changes in the ontogenetic life strategies of two species of extinct planktonic foraminifera and…”
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Primary production in the Arabian Sea during the last 135 000 years by Ivanova, Elena, Schiebel, Ralf, Singh, Arun Deo, Schmiedl, Gerhard, Niebler, Hans-Stefan, Hemleben, Christoph

“…Variations in primary productivity (PP) have been reconstructed in eutrophic, mesotrophic and oligotrophic parts of the Arabian Sea over the past 135 000 years…”
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Distribution of diatoms, coccolithophores and planktic foraminifers along a trophic gradient during SW monsoon in the Arabian Sea by Schiebel, Ralf, Zeltner, Alexandra, Treppke, Ute F., Waniek, Joanna J., Bollmann, Jörg, Rixen, Tim, Hemleben, Christoph

“…The distribution of diatoms, coccolithophores and planktic foraminifers mirrored the hydrographic and trophic conditions of the surface ocean (0–100 m) across…”
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Population dynamics of the planktic foraminifer Globigerina bulloides from the eastern North Atlantic by Schiebel, Ralf, Bijma, Jelle, Hemleben, Christoph

“…A cumulative data set from the eastern North Atlantic was compiled and analysed to study the population dynamics of Globigerina bulloides. Data were generated…”
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Spatial productivity variations during formation of sapropels S5 and S6 in the Mediterranean Sea: evidence from Ba contents by Weldeab, Syee, Emeis, Kay-Christian, Hemleben, Christoph, Schmiedl, Gerhard, Schulz, Hartmut

“…We investigated five time-equivalent core sections (180–110 kyr BP) from the Balearic Sea (Menorca Rise), the easternmost Levantine Basin and southwest, south,…”
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Foraminiferal response to the Northeast Monsoon in the western and southern Arabian Sea by Heinz, Petra, Hemleben, Christoph

“…Sediments from the western and southern part of the Arabian Sea were collected periodically in the spring intermonsoon between March and May 1997 and…”
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Ribosomal DNA shows extremely low genetic divergence in a world-wide distributed, but disjunct and highly adapted marine protozoan ( Virgulinella fragilis, Foraminiferida) by Tsuchiya, Masashi, Grimm, Guido W., Heinz, Petra, Stögerer, Karin, Ertan, Kemal Topaç, Collen, John, Brüchert, Volker, Hemleben, Christoph, Hemleben, Vera, Kitazato, Hiroshi

“…Virgulinella fragilis can be mainly observed in different, separated, oxygen-depleted and sulfide-enriched environments around the world and seems to be well…”
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Formation of the Late Aptian Niveau Fallot black shales in the Vocontian Basin (SE France): evidence from foraminifera, palynomorphs, and stable isotopes by Friedrich, Oliver, Reichelt, Kerstin, Herrle, Jens O., Lehmann, Jens, Pross, Jörg, Hemleben, Christoph

“…We present paleoceanographic models for the formation of the marlstone facies and the most prominent black shale intervals of the Late Aptian Niveau Fallot…”
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Molecular evolution of some selected benthic foraminifera as inferred from sequences of the small subunit ribosomal DNA by Ertan, Kemal Topaç, Hemleben, Vera, Hemleben, Christoph

“…Up to now the benthic foraminiferal classification is based mainly on morphological characters leading to controversies and systematic rearrangements. Previous…”
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Diversity of rDNA in Chilostomella: Molecular differentiation patterns and putative hermit types by Grimm, Guido W., Stögerer, Karin, Topaç Ertan, Kemal, Kitazato, Hiroshi, Kučera, Michal, Hemleben, Vera, Hemleben, Christoph

“…We present new data on nuclear DNA sequences coding for the 3′ region of the small subunit ribosomal RNA (SSU rDNA), the 5.8 subunit and the internal…”
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