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Prof.dr. G.J. van der Zwaan Person

Prof.dr. G.J. van der Zwaan

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  • Copper incorporation in foraminiferal calcite: results from culturing experiments (2007)Open access

    Authors:Nooijer, L.J. de; Reichart, G.-J.; Dueñas Bohórquez, A.D.B.; Wolthers, M.; Ernst, S.R.; Mason, P.R.D.; Zwaan, G.J. van der
    In:Biogeosciences, 4, 493 - 504. ISSN 1726-4170.

    Abstract:

    A partition coefficient for copper (DCu) in foraminiferal calcite has been determined by culturing individuals of two benthic species under controlled laboratory conditions. The partition coefficient of a trace element (TE) is an emperically determined relation between the TE/Ca ratio in seawater an

  • Copper incorporation in foraminiferal calcite: results from culturing experiments (2007)Open access

    Authors:Nooijer, L.J. de; Reichart, G.-J.; Dueñas Bohórquez, A.D.B.; Wolthers, M.; Ernst, S.R.; Mason, P.R.D.; Zwaan, G.J. van der
    In:Biogeosciences Discussions, 4, 961 - 991. ISSN 1810-6277.

    Abstract:

    A partition coefficient for copper (DCu) in foraminiferal calcite has been determined by culturing individuals of two benthic species under controlled laboratory conditions. The partition coefficient of a trace element (TE) is an emperically determined relation between the TE/Ca ratio in seawater an

  • Evidence for complete denitrification in a benthic foraminifer (2006)

    Authors:Risgaard-Petersen, N.; Langezaal, A.M.; Ingvardsen, S.; Schmid, M.C.; Jetten, M.S.M.; Camp, H.J.M. op den; Derksen, J.W.M.; Pina-Ochoa, E.; Eriksson, S.P.; Nielsen, L.P.; Revsbech, N.P.; Cedhagen, T.; Zwaan, G.J. van der
    In:Nature, 443, 93 - 96. ISSN 0028-0836.

  • The recovery of benthic foraminifera and bacteria after disturbance: experimental evidence (2004)

    Authors:Langezaal, A.M.; Bergen, R. van; Zwaan, G.J. van der
    In:Journal of Experimental Marine Biology and Ecology, 312, 137 - 170. ISSN 0022-0981.

    Abstract:

    In experiments with living meiofauna, sediment is often sieved prior to incubation. This is primarily to remove macrofauna and to increase reproducibility among replicates. At the onset of the experiment, the bacteria are severely disturbed. The effects of these disturbances are ill-known but might

  • Atlantic-European oligocene to recent uvigerina : taxonomy, paleoecology and paleobiogeography (1986)Open access

    Authors:Zwaan, G.J. van der; Jorissen, F.J.; Verhallen, P.J.J.M.; Daniels, C.H. von
    In:Utrecht micropaleontological bulletins, 35. ISSN 0083-4963.

    Abstract:

    At the amply attended conference on 'Reconstruction of marine paleoenvironments' held in Utrecht in 1983, a number of participants formed the International Working Group on Benthic Foraminifera, with the purpose to join their research efforts on the taxonomy and the distribution of selected groups.

  • Paleoecology of late miocene mediterranean foraminifera (1982)Open access

    Author:Zwaan, G.J. van der
    In:Utrecht micropaleontological bulletins, 25. ISSN 0083-4963.

    Abstract:

    Qualitative and quantitative analyses were made of the benthic and planktonic foraminiferal associations derived from about 400 samples of the Cretan and Sicilian Upper Miocene (Tortonian and Messinian). The quantitative data were analyzed by means ofR- and Q-mode computer programs, which resulted i

  • Problems of detailed biostratigraphic and magnetostratigraphic correlation in the Potamidha and Apostoli sections of the Cretan Neogene (1979)Open access

    Authors:Drooger, C.W.; Meulenkamp, J.E.; Langereis, C.G.; Wonders, A.A.H.; Zwaan, G.J. van der; Drooger, M.M.; Raju, D.S.N.; Doeven, P.H.; Zachariasse, W.J.; Schmidt, R.R.; Zijderveld, J.D.A.
    In:Utrecht micropaleontological bulletins, 21. ISSN 0083-4963.

    Abstract:

    The Utrecht working group taking part in the I.G.C.P. project no. 1, "Accuracy in time", received its initial funds in the middle of 1975. The group hastened to collect a first series of samples with which it could begin its research. The marly clays of the selected sections Apostoli and Potamidha 1

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