Browse by AWI author ID

Article

Wolf‐Gladrow, D. A. and Klaas, C.

(2024)
Total alkalinity change: The perspective of phytoplankton stoichiometry ,

Limnology and Oceanography .

doi:10.1002/lno.12597 , hdl:10013/epic.9db2917d-8c5a-4385-acd5-25fbd0f60f77

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"Berichte zur Polar- und Meeresforschung" unspecified

Klaas, C.

(2023)
The Expedition PS133/1 of the Research Vessel Polarstern to the Atlantic Ocean in 2022 / Bornemann, H. and Amir Sawadkuhi, S. (editors) ,

Berichte zur Polar- und Meeresforschung = Reports on polar and marine research, Bremerhaven, Alfred-Wegener-Institut Helmholtz-Zentrum für Polar- und Meeresforschung, 774 , 144 p. .

doi:10.57738/BzPM_0774_2023 , hdl:10013/epic.e56f5afd-f03a-478a-b163-dafb98fb3c7c

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Article

Laglera, L. M. , Uskaikar, H. , Klaas, C.

, Naqvi, S. W. A. , Wolf-Gladrow, D. A. and Tovar-Sánchez, A. (2022)
Dissolved and particulate iron redox speciation during the LOHAFEX fertilization experiment ,

Marine Pollution Bulletin, 184 , p. 114161 .

doi:10.1016/j.marpolbul.2022.114161 , hdl:10013/epic.8fbc499b-ffa6-451b-b085-7a3ac07e617f

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Expedition program

Klaas, C.

(2022)
Expedition Programme 133/1 ,

Expeditionsprogramm Polarstern, Bremerhaven, Alfred Wegener Institute for Polar and Marine Research, 51 p. .

hdl:10013/epic.2debe45c-4340-4ef3-813c-6b04e514a47f

[thumbnail of Expeditionsprogramme_PS133_1.pdf]

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Article

Husmann, E. and Klaas, C.

(2022)
Testing the use of the silica deposition fluorescent probe PDMPO to estimate in situ growth rates of diatoms ,

Limnology and Oceanography Methods, 20 (9), pp. 568-580 .

doi:10.1002/lom3.10505 , hdl:10013/epic.9a0284c7-4fe8-4a5a-8984-5e2aaa28f582

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Conference -Keynote

Klaas, C.

(2022)
Southern Ocean export processes ,

GreenOcean Workshop, Ecole Normale Supérieure, Paris, France, 18 May 2022 - 19 May 2022 .

hdl:10013/epic.f2bb89c0-1266-4a35-9780-17eb9daca7ce

Conference -Keynote

Klaas, C.

(2022)
Ocean Fertilization ,

EMBRC Symposium on Marine Carbon Sequestration, Ostend Science Park, Belgium, 11 May 2022 - 11 May 2022 .

hdl:10013/epic.73c45982-7e92-41ee-9d7a-13fbbb2e62a9

Conference -Invited talk

Klaas, C.

(2022)
Biological processes and the Southern Ocean carbon cycle ,

Geoökologisches Kolloquium, TU-Braunschweig, Germany., 27 January 2022 - 27 January 2022 .

hdl:10013/epic.1a9ff316-5457-45ed-b613-e3f0f10a059d

Conference -Keynote

Klaas, C.

(2020)
Biological processes and the Southern Ocean carbon cycle ,

Orchestra & RoSES Annual Science meeting, UK (online), 20 July 2020 - 24 July 2020 .

hdl:10013/epic.b2954ba7-cec2-4bb6-9c90-119cd5d4639e

Article

Donahue, K. , Klaas, C.

, Dillingham, P. W. and Hoffmann, L. J. (2019)
Combined effects of ocean acidification and increased light intensity on natural phytoplankton communities from two Southern Ocean water masses. ,

Journal of Plankton Research, 41 (1), pp. 30-45 .

doi:10.1093/plankt/fby048 , hdl:10013/epic.dc8b2350-ba9d-43bc-a4ea-598dcd1bb8a8

Article

Beszteri, B.

, Allen, C. , Almandoz, G. O. , Armand, L. , Barcena, M. A. , Cantzler, H. , Crosta, X. , Esper, O.

, Jordan, R. W. , Kauer, G. , Klaas, C.

, Kloster, M.

, Leventer, A. , Pike, J. and Rigual Hernández, A. S. (2018)
Quantitative comparison of taxa and taxon concepts in the diatom genus Fragilariopsis: a case study on using slide scanning, multiexpert image annotation, and image analysis in taxonomy ,

Journal of Phycology, 54 (5), pp. 703-719 .

doi:10.1111/jpy.12767 , hdl:10013/epic.c82a098a-627e-4676-92bb-0b358a3a5aac

[thumbnail of Beszteri_et_al-2018-Journal_of_Phycology.pdf]

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Article

Schulz, I. , Montresor, M. , Klaas, C.

, Assmy, P. , Wolzenburg, S. , Gauns, M. , Sarkar, A. , Thiele, S. , Wolf-Gladrow, D.

, Naqvi, W. and Smetacek, V. (2018)
Remarkable structural resistance of a nanoflagellatedominated plankton community to iron fertilization during the Southern Ocean experiment LOHAFEX ,

MARINE ECOLOGY PROGRESS SERIES, 601 , pp. 77-95 .

doi:10.3354/meps12685 , hdl:10013/epic.100e1c6d-0bc2-4291-ae85-88c383676ca9

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Article

Meyer, B.

, Freier, U. , Grimm, V. , Groeneveld, J. , Hunt, B. P. V. , Kerwath, S. , King, R. , Klaas, C.

, Pakhomov, E. A. , Meiners, K. M. , Melbourne-Thomas, J. , Murphy, E. J. , Thorpe, S. E. , Stammerjohn, S. , Wolf-Gladrow, D.

, Auerswald, L. , Götz, A. , Halbach, L. , Jarman, S. , Kawaguchi, S. , Krumpen, T.

, Nehrke, G.

, Ricker, R.

, Sumner, M. , Teschke, M. , Trebilco, R. and Yilmaz, I. N. (2017)
The winter pack-ice zone provides a sheltered but food-poor habitat for larval Antarctic krill ,

Nature Ecology & Evolution, 1 , pp. 1853-1861 .

doi:10.1038/s41559-017-0368-3 , hdl:10013/epic.a7576f3f-7b1b-40c1-b258-2d720aed341d

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Article

Jones, E. M. , Hoppema, M.

, Strass, V.

, Hauck, J.

, Salt, L. , Ossebaar, S. , Klaas, C.

, van Heuven, S. M. , Wolf-Gladrow, D.

, Stöven, T. and de Baar, H. J. W. (2017)
Mesoscale features create hotspots of carbon uptake in the Antarctic Circumpolar Current ,

Deep Sea Research Part II: Topical Studies in Oceanography, 138 , pp. 39-51 .

doi:10.1016/j.dsr2.2015.10.006 , hdl:10013/epic.46349

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Article

Puigcorbé, V. , Roca-Martí, M. , Masqué, P. , Benitez-Nelson, C. R. , Rutgers v. d. Loeff, M.

, Laglera, L. M. , Bracher, A.

, Cheah, W. , Strass, V. H.

, Hoppema, M.

, Santos-Echeandía, J. , Hunt, B. P. , Pakhomov, E. A. and Klaas, C.

(2017)
Particulate organic carbon export across the Antarctic Circumpolar Current at 10°E: Differences between north and south of the Antarctic Polar Front ,

Deep Sea Research Part II: Topical Studies in Oceanography, 138 , pp. 86-101 .

doi:10.1016/j.dsr2.2016.05.016 , hdl:10013/epic.48717

Article

Canário, J. , Santos-Echeandia, J. , Padeiro, A. , Amaro, E. , Strass, V.

, Klaas, C.

, Hoppema, M.

, Ossebaar, S. , Koch, B. P.

and Laglera, L. M. (2017)
Mercury and methylmercury in the Atlantic sector of the Southern Ocean ,

Deep Sea Research Part II: Topical Studies in Oceanography, 138 , pp. 52-62 .

doi:10.1016/j.dsr2.2016.07.012 , hdl:10013/epic.48726

Article

Strass, V. H.

, Wolf-Gladrow, D.

, Pakhomov, E. A. and Klaas, C.

(2017)
Eddy-Pump: Pelagic carbon pump processes along the eddying Antarctic Polar Front in the Atlantic Sector of the Southern Ocean ,

Deep Sea Research Part II: Topical Studies in Oceanography, 138 , pp. 1-5 .

doi:10.1016/j.dsr2.2017.02.009 , hdl:10013/epic.50712

Article

Roca-Martí, M. , Puigcorbé, V. , Iversen, M.

, Rutgers v. d. Loeff, M.

, Klaas, C.

, Cheah, W. , Bracher, A.

and Masque, P. (2017)
High particulate organic carbon export during the decline of a vast diatom bloom in the Atlantic sector of the Southern Ocean ,

Deep-Sea Research Part II-Topical Studies in Oceanography, 138 , pp. 102-115 .

doi:10.1016/j.dsr2.2015.12.007 , hdl:10013/epic.48590

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Article

Laglera, L. M. , Tovar-Sanchez, A. , Iversen, M.

, Gonzalez, H. , Naik, H. , Mangesh, G. , Assmy, P. , Klaas, C.

, Mazzocchi, M. , Montresor, M. , Naqvi, S. , Smetacek, V. and Wolf-Gladrow, D.

(2017)
Iron partitioning during LOHAFEX: Copepod grazing as a major driver for iron recycling in the Southern Ocean ,

Marine Chemistry, 196 , pp. 148-161 .

doi:10.1016/j.marchem.2017.08.011 , hdl:10013/epic.07409c7d-b2c9-4571-af01-b636bc955afa

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Article

Iversen, M. H.

, Pakhomov, E. A. , Hunt, B. P. V. , van der Jagt, H. , Wolf-Gladrow, D. A.

and Klaas, C.

(2016)
Sinkers or floaters? Contribution from salp pellets to the export flux during a large bloom event in the Southern Ocean ,

Deep-Sea Research II .

doi:10.1016/j.dsr2.2016.12.004

Conference -Poster

Canário, J. , Santos-Echeandía, J. , Padeiro, A. , Amaro, E. , Strass, V.

, Klaas, C.

, Hoppema, M.

, Ossebaar, S. , Koch, B. P.

and Laglera, L. (2016)
Mercury and methylmercury in the Atlantic sector of the Southern Ocean ,

SCAR 2016 Open Science Conference, Kuala Lumpur, Malaysia, 20 August 2016 - 30 August 2016 .

hdl:10013/epic.48524

Article

Wolf, C. , Iversen, M.

, Klaas, C.

and Metfies, K.

(2016)
Limited sinking of Phaeocystis during a 12 days sediment trap study ,

Molecular Ecology, 25 , pp. 3428-3435 .

doi:10.1111/mec.13697 , hdl:10013/epic.48393

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Conference -Talk

Roca-Martí, M. , Puigcorbé, V. , Masqué, P. , Rutgers v. d. Loeff, M.

, Iversen, M.

, Hoppe, C.

, Klaas, C.

, Altenburg, M. and Bracher, A.

(2015)
Carbon export in a bloom region from the Atlantic sector of the Southern Ocean derived from 234Th and sediment traps ,

2015 Aquatic Sciences Meeting, Granada, 22 February 2015 - 27 February 2015 .

hdl:10013/epic.46668

Article

Ruff, S. E. , Probandt, D. , Zinkann, A. C. , Iversen, M. H. , Klaas, C.

, Würzberg, L. , Krombholz, N. , Wolf-Gladrow, D.

, Amann, R. and Knittel, K. (2014)
Indications for algae-degrading benthic microbial communities in deep-sea sediments along the Antarctic Polar Front ,

Deep Sea Research Part II: Topical Studies in Oceanography, 108 , pp. 6-16 .

doi:10.1016/j.dsr2.2014.05.011 , hdl:10013/epic.44337

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Article

Ruff, E. S. , Probandt, D. , Zinkann, A. C. , Iversen, M.

, Klaas, C.

, Würzberg, L. , Krombholz, N. , Wolf-Gladrow, D.

, Amann, R. and Knittel, K. (2014)
Interactions for algae-degrading benthic microbial communities in deep-sea sediments along the Antarctic Polar Front. ,

Deep-Sea Research Part II-Topical Studies in Oceanography, 108 , pp. 6-16 .

doi:10.1016/j.dsr2.2014.05.011 , hdl:10013/epic.45702

Article

Assmy, P. , Cisewski, B. , Henjes, J.

, Klaas, C.

, Montresor, M. and Smetacek, V. (2014)
Response of the protozooplankton assemblage during the European Iron Fertilization Experiment (EIFEX) in the Antarctic circumpolar current ,

Journal of Plankton Research, 36 (5), pp. 1175-1189 .

doi:10.1093/plankt/fbu068 , hdl:10013/epic.44155

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Article

Armbrecht, L. H. , Smetacek, V. , Assmy, P. and Klaas, C.

(2014)
Cell death and aggregate formation in the giant diatom Coscinodiscus wailesii (Gran & Angst, 1931) ,

Journal of Experimental Marine Biology and Ecology, 452 , pp. 31-39 .

doi:10.1016/j.jembe.2013.12.004 , hdl:10013/epic.42958

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Article

Losch, M.

, Strass, V.

, Cisewski, B. , Klaas, C.

and Bellerby, R. G. (2014)
Ocean state estimation from hydrography and velocity observations during EIFEX with a regional biogeochemical ocean circulation model ,

Journal of Marine Systems, 129 , pp. 437-451 .

doi:10.1016/j.jmarsys.2013.09.003 , hdl:10013/epic.42723

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Conference -Conference paper

Strass, V. H.

, Leach, H. , Prandke, H. , Donnelly, M. S. , Klaas, C.

, Bracher, A.

, Cheah, W. and Wolf-Gladrow, D.

(2013)
Physico-biogeochemical differences along the ACC in the Atlantic Sector during one late summer - first results obtained from Eddy Pump ,

ASLO Aquatic Sciences Meeting, New Orleans, February 2013 - unspecified .

hdl:10013/epic.41128

Conference -Talk

Roca-Martí, M. , Puigcorbé, V. , Masqué, P. , Rutgers van der Loeff, M.

, Stimac, I.

, Iversen, M. , Strass, V.

, Klaas, C.

and Wolf-Gladrow, D.

(2013)
Impact of eddy structures and the Polar Front region on carbon export fluxes in the water column of the Southern Ocean ,

ASLO Aquatic Sciences Meeting, New Orleans, February 2013 - unspecified .

hdl:10013/epic.41129

Article

Assmy, P. , Smetacek, V. , Montresor, M. , Klaas, C.

, Henjes, J.

, Strass, V.

, Arrieta, J. M. , Bathmann, U. V. , Berg, G. M. , Breitbarth, E. , Cisewski, B. , Friedrichs, L. , Fuchs, N. , Herndl, G. J. , Jansen, S. , Krägefsky, S. , Latasa, M. , Peeken, I.

, Röttgers, R. , Scharek, R. , Schüller, S. E. , Steigenberger, S. , Webb, A. and Wolf-Gladrow, D.

(2013)
Thick-shelled, grazer-protected diatoms decouple ocean carbon and silicon cycles in the iron-limited Antarctic Circumpolar Current ,

Proceedings of the National Academy of Sciences of the United States of America .

doi:10.1073/pnas.1309345110 , hdl:10013/epic.42682

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Article

Smetacek, V. , Klaas, C.

, Strass, V.

, Assmy, P. , Montresor, M. , Cisewski, B. , Savoye, N. , Webb, A. , d'Ovidio, F. , Arrieta, J. M. , Bathmann, U. , Bellerby, R. , Berg, G. M. , Croot, P. L. , Gonzalez, S. , Henjes, J.

, Herndl, G. J. , Hoffmann, L. J. , Leach, H. , Losch, M.

, Mills, M. M. , Neill, C. , Peeken, I.

, Roettgers, R. , Sachs, O. , Sauter, E.

, Schmidt, M. , Schwarz, J. N. , Terbrüggen, A. and Wolf-Gladrow, D.

(2012)
Deep carbon export from a Southern Ocean iron-fertilized diatom bloom. ,

Nature, 487 (7407), pp. 313-319 .

doi:10.1038/nature11229 , hdl:10013/epic.40646

Article

Löder, M. , Aberle, N. , Klaas, C.

, Kraberg, A.

and Wiltshire, K. H.

(2010)
Conserving original in situ diversity in microzooplankton grazing set-ups ,

Marine Biodiversity Records, 3, e28, published online .

doi:10.1017/S1755267210000254 , hdl:10013/epic.34474

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Article

Bollmann, J. , Klaas, C.

and Brand, L. E. (2010)
Morphological and physiological characteristics of Gephyrocapsa oceanica var. typica Kamptner 1943 in culture experiments: Evidence for genotypic variability. ,

Protist, 161 (1), pp. 78-90 .

doi:10.1016/j.protis.2009.08.002 , hdl:10013/epic.34484

Article

Klaas, C.

and Assmy, P. (2010)
Fragilariopsis kerguelensis - eine Schlüsselart für den globalen Silicatkreislauf ,

Naturwissenschaftliche Rundschau, 63 (8), pp. 2-3 .

hdl:10013/epic.35673

Article

Mazzocchi, M. G. , Gonzalez, H. E. , Vandromme, P. , Borrione, I. , Ribera d'Alcalà, M. , Gauns, M. , Assmy, P. , Fuchs, B. , Klaas, C.

, Martin, P. , Montresor, M. , Ramaiah, N. , Naqvi, W. and Smetacek, V. (2009)
A non-diatom plankton bloom controlled by copepod grazing and amphipod predation: Preliminary results from the LOHAFEX iron-fertilisation experiment. ,

GLOBEC International NewsletterOctober, 15 (2), pp. 3-6 .

hdl:10013/epic.33362

Inbook

Nöthig, E. M.

, Assmy, P. , Klaas, C.

and Scharek, R. (2009)
Phyto- and protozooplankton in polar waters ,

Biological studies in polar oceans : exploration of life in icy waters ; 35 research reports and reviews / Gotthilf and Irmtraut Hempel (ed.) Bremerhaven : Wirtschaftsverl. NW, Verl. für neue Wissenschaft, ISBN: 978-3-86509-865-8 .

hdl:10013/epic.33511

Conference -Poster

Löder, M. , Kraberg, A.

, Aberle, N. , Klaas, C.

and Wiltshire, K. H.

(2009)
Micro- versus mesozooplankton grazing: the contribution of ciliates, dinoflagellates and copepods in controlling phytoplankton biomass ,

AWI PhD Day 2009, 3.-6.06.2009, List. .

hdl:10013/epic.36513

Article

Klaas, C.

, Verity, P. G. and Schultes, S. (2008)
Determination of copepod grazing on natural plankton communities: correcting for trophic-cascade effects ,

Marine Ecology Progress Series, 357 , pp. 195-206 .

doi:10.3354/meps07262 , hdl:10013/epic.30378

Article

Bollmann, J. and Klaas, C.

(2008)
Morphological variation of Gephyrocapsa oceanica Kamptner 1943 in plankton samples; implications for ecologic and taxonomic interpretations ,

Protist, 159 , pp. 369-381 .

doi:10.1016/j.protis.2008.02.001 , hdl:10013/epic.30941

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Article

Dehairs, F. , de Brauwere, A. , Elskens, M. , Bathmann, U. , Becquevort, S. , Blain, S. , Boyd, P. , Buesseler, K. , Buitenhuis, E. , Gehlen, M. , Herndl, G. , Klaas, C.

, Lampitt, R. , Lefevre, D. , Passow, U. and Ploug, H. (2008)
Controls on Organic Carbon Export and Twilight Zone Remineralization / Primeau, F. , Stemmann, L. and Trull, T. (editors) ,

Oceanography, 21 , pp. 92-95 .

hdl:10013/epic.31016

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Article

Assmy, P. , Henjes, J.

, Klaas, C.

and Smetacek, V. (2007)
Mechanisms determining species dominance in a phytoplankton bloom induced by the iron fertilization experiment EisenEx in the Southern Ocean. ,

Deep Sea Research I:, 54 (3), pp. 340-362 .

doi:10.1016/j.dsr.2006.12.005 , hdl:10013/epic.25072

Article

Henjes, J.

, Assmy, P. , Klaas, C.

, Verity, P. and Smetacek, V. (2007)
Response of microzooplankton (protists and small copepods) to an iron-induced phytoplankton bloom in the Southern Ocean (EisenEx) ,

Deep Sea Research I, 54 (3), pp. 363-384 .

doi:10.1016/j.dsr.2006.12.004 , hdl:10013/epic.25074

Article

Wolf-Gladrow, D.

, Zeebe, R. , Klaas, C.

, Körtzinger, A. and Dickson, A. G. (2007)
Total alkalinity: the explicit conservative expression and its application to biogeochemical processes ,

Marine Chemistry, 106 , pp. 287-300 .

doi:10.1016/j.marchem.2007.01.006 , hdl:10013/epic.26875

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Article

Henjes, J.

, Assmy, P. , Klaas, C.

and Smetacek, V. (2007)
Response of the larger protozooplankton to an iron-induced phytoplankton bloom in the Polar Frontal Zone of the Southern Ocean (EisenEx) ,

Deep Sea Research I: Oceanographic Research Papers:, 54 (5), pp. 774-791 .

doi:10.1016/j.dsr.2007.02.005 , hdl:10013/epic.26353

Conference -Poster

Assmy, P. , Klaas, C.

, Henjes, J.

, Montresor, M. , Peeken, I.

, Röttgers, R. , Wolf-Gladrow, D.

and Smetacek, V. (2007)
Exceptional growth rates of phytoplankton species under iron-replete conditions ,

Gordon Research Conference Polar Marine Science, 25-30 March 2007, Ventura, California, USA. .

hdl:10013/epic.26533

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Conference -Poster

Löder, M. , Kraberg, A.

, Aberle, N. , Klaas, C.

and Wiltshire, K. H.

(2007)
Micro- versus mesozooplankton grazing: The contribution of ciliates, dinoflagellates and copepods in controlling phytoplankton biomass - First steps in measuring the grazing ,

42. European Marine Biology Symposium, 27.-31.8.2007, Kiel, Germany. .

hdl:10013/epic.28023

Conference -Poster

Löder, M. , Kraberg, A.

, Aberle, N. , Klaas, C.

and Wiltshire, K. H.

(2007)
Grazing on phytoplankton: the contribution of micro- and mesozooplankton in controlling phytoplankton biomass ,

Deutsche Botanikertagung, 3.-7.9.2007, Hamburg, Germany. .

hdl:10013/epic.28025

Article

Assmy, P. , Cisewski, B. , Henjes, J.

, Klaas, C.

, Sachs, O. , Smetacek, V. and Strass, V.

(2007)
Pluja de Plàncton a l'oceà Antàrtic: l'experiment Europeu de fertilització amb ferro. ,

Omnis Cellular 15 .

hdl:10013/epic.33627

Conference -Poster

Löder, M. , Kraberg, A.

, Aberle, N. , Klaas, C.

and Wiltshire, K. H.

(2007)
Mikrozoo- vs. mesozooplankton grazing: The importance of dinoflagellates, ciliates and copepods in controlling phytoplankton blooms ,

AWI PhD Day 2007, 11.-13.05.07, Bremerhaven .

hdl:10013/epic.36512

Article

Howard, M. T. , Winguth, A. M. E. , Klaas, C.

and Maier-Reimer, E. (2006)
Sensitivity of ocean carbon tracer distributions to particulate organic flux parameterizations ,

Global Biogeochemical Cycles, 20, GB3011 .

doi:10.1029/2005GB002499 , hdl:10013/epic.22857

Article

Jansen, S. , Klaas, C.

, Krägefsky, S. , von Harbou, L. and Bathmann, U. (2006)
Reproductive response of the copepod Rhincalanus gigas to an iron-induced phytoplankton bloom in the Southern Ocean ,

Polar biology, 29 (12), pp. 1039-1044 .

doi:10.1007/s00300-006-0147-0 , hdl:10013/epic.23873

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Conference -Poster

Jansen, S. , Klaas, C.

, Krägefsky, S. , von Harbou, L. , Teschke, M. and Bathmann, U. (2006)
Reproduction of the copepod Rhincalanus gigas during an iron-induced phytoplankton bloom in the Southern Ocean ,

2nd SCAR Open Science Conference "Antarctic in the Earth System", 12-14 July 2006, Hobart, Australia. .

hdl:10013/epic.25069

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Article

Assmy, P. , Cisewski, B. , Henjes, J.

, Klaas, C.

, Sachs, O. , Smetacek, V. and Strass, V.

(2006)
Plankton rain in the Southern Ocean: The European Iron Fertilization Experiment EIFEX ,

Das AWI in den Jahren 2004 und 2005 - Report, 2004 (2005), pp. 38-41 .

hdl:10013/epic.25347

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Conference -Poster

Assmy, P. , Henjes, J.

, Klaas, C.

, Sachs, O. , Sauter, E.

and Smetacek, V. (2006)
Mass sinking of individual species populations during an iron fertilization experiment in the Southern Ocean (EIFEX). ,

Gordon Research Conference Marine Microbes: Activities & Interactions, 23-28 July 2006, Biddeford, Maine, USA.. .

hdl:10013/epic.25835

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Conference -Poster

Henjes, J.

, Assmy, P. , Klaas, C.

, Smetacek, V. and Montresor, M. (2006)
Response of microzooplankton to iron-induced phytoplankton blooms in the Southern Ocean ,

Gordon Research Conference Marine Microbes: Activities & Interactions, 23-28 July 2006, Biddeford, Maine, USA. .

hdl:10013/epic.25845

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Conference -Invited talk

Smetacek, V. , Assmy, P. , Cisewski, B. , Henjes, J.

, Klaas, C.

, Strass, V.

and Montresor, M. (2006)
Aggregation and mass sinking of diatom species populations from an iron-fertilized bloom in the Southern Ocean ,

International Workshop on Marine Aggregates (IWOMA), 11+12 Dec. 2006, MPI Bremen, Germany. .

hdl:10013/epic.26025

Article

Le Quéré, C. , Harrison, S. P. , Prentice, I. C. , Buitenhuis, E. T. , Aumont, O. , Bopp, L. , Claustre, H. , Cotrim da Cunha, L. , Geider, R. , Giraud, X. , Klaas, C.

, Kohfeld, K. E. , Legendre, L. , Manizza, M. , Platt, T. , Rivkin, R. B. , Sathyendranath, S. , Uitz, J. , Watson, A. J. and Wolf-Gladrow, D.

(2005)
Ecosystem dynamics based on plankton functional types for global ocean biogeochemistry models ,

Global Change Biology, 11 , pp. 2016-2040 .

doi:10.1111/j.1365-2486.01004.x , hdl:10013/epic.22409

Preview

Conference -Talk

Assmy, P. , Henjes, J.

, Klaas, C.

and Smetacek, V. (2005)
SPECIES-SPECIFIC GROWTH PERFORMANCE AND GRAZING MORTALITY OF THE DIATOM ASSEMBLAGE DURING AN IN SITU IRON-INDUCED BLOOM IN THE SOUTHERN OCEAN (EISENEX) ,

ASLO Summer Meeting 2005, Special Session 11: Biodiversity, biogeochemistry and trophic interactions: The braid of pelagic microbial ecology. 19.-24. June, Santiago de Compostela, Spain. .

hdl:10013/epic.23887

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Conference -Talk

Henjes, J.

, Assmy, P. , Klaas, C.

and Smetacek, V. (2005)
Impact of copepod grazing on developmental dynamics of an iron-induced phytoplankton bloom (EisenEx) ,

SS11: Biodiversity, Biogeochemistry and Trophic Interactions: The Braid of Pelagic Microbial Ecology, American Society of Limnology and Oceanography (ASLO) Summer Meeting 2005,1924 June, Santiago de Compostela, Spain .

hdl:10013/epic.23888

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Conference -Talk

Strass, V.

, Assmy, P. , Bathmann, U. , Bellerby, R. , Cisewski, B. , Croot, P. , Gonzales, S. , Hoffmann, L. , Klaas, C.

, Krägefsky, S. , Leach, H. , Peeken, I.

, Savoye, N. and Smetacek, V. (2005)
Particle sedimentation from an iron-stimulated phytoplankton bloom in the Southern Ocean ,

Dynamic Planet 2005, 22-26 August, Cairns, Australia. .

hdl:10013/epic.24608

Inbook

Prentice, I. C. , Le Quéré, C. , Buitenhuis, E. T. , House, J. I. , Klaas, C.

and Knorr, W. (2004)
Biosphere dynamics: challenges for Earth System Models. In C. J. Hawkesworth and R. S. J. Sparks (eds), The State of the Planet: Frontiers and Challenges in Geophysics. ,

AGU, Geophysical Monograph 150. IUGG19. .

hdl:10013/epic.22408

Conference -Poster

Assmy, P. , Henjes, J.

, Klaas, C.

and Smetacek, V. (2004)
Response of the diatom assemblage to iron fertilization in the Antarctic Polar Frontal Zone ,

SCAR Open Science Conference, Antarctica and the Southern Ocean in the Global System, 25-31 July, Bremen, Germany .

hdl:10013/epic.24096

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Conference -Poster

Henjes, J.

, Assmy, P. , Klaas, C.

and Smetacek, V. (2004)
Response of small grazers to iron-induced phytoplankton blooms in the Antarctic Polar Frontal Zone ,

SCAR Open Science Conference "Antarctic and the Southern Ocean in the Global System", 25-31 July, Bremen, Germany .

hdl:10013/epic.24097

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Article

Ziveri, P. , Stoll, H. M. , Probert, I. , Klaas, C.

, Geisen, M. , Ganssen, G. M. and Young, J. R. (2003)
Stable isotope "vital effects" in coccolith calcite ,

Earth and planetary science letters, 201 , pp. 137-149 .

hdl:10013/epic.17348

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Conference -Poster

Assmy, P. , Henjes, J.

, Klaas, C.

and Smetacek, V. (2003)
Biological response to iron fertilization in the Polar Frontal Zone of the Southern Ocean (EisenEx) ,

Ocean Biogeochemistry & Ecosystems Analysis (OCEANS), International Open Science Conference, 7-10 Jan., Paris, France. .

hdl:10013/epic.19027

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Conference -Poster

Assmy, P. , Henjes, J.

, Klaas, C.

and Smetacek, V. (2003)
Response of a diatom community to iron fertilization in the Polar Frontal Zone of the Southern Ocean (EisenEx): A species approach ,

Gordon Research Conference on Polar Marine Research, The changing polar oceans: impacts of a changing climate on physical, chemical, biological and coupled systems, 16-21 March, Ventura, CA, USA. .

hdl:10013/epic.19028

Conference -Poster

Henjes, J.

, Assmy, P. , Klaas, C.

and Smetacek, V. (2003)
Response of small grazers to an iron-induced diatom bloom in the Polar Frontal Zone of the Southern Ocean ,

Gordon Research Conference on Polar Marine Science, The changing polar oceans: impacts of a changing climate on physical, chemical, biological and coupled systems, 16-21 March, Ventura, USA. .

hdl:10013/epic.19029

Preview

Conference -Invited talk

Smetacek, V. , Assmy, P. , Henjes, J.

and Klaas, C.

(2003)
Plankton species selection during the iron-vertilization experiment EisenEx in the Southern Ocean ,

EGS-AGU-EUG Joint Assembly, "The Southern Ocean´s role in present and past climate", 06-11 April 2003, Nice, France .

hdl:10013/epic.19032

Conference -Invited talk

Klaas, C.

and Archer, D. (2003)
Spatial patterns of organic carbon, opal and CaCO3 fluxes in sediments traps: Application to the LGM carbon cycle ,

EGS-AGU-EUG Joint Assembly, Nice, France. .

hdl:10013/epic.22416

Article

Smetacek, V. , Klaas, C.

, Menden-Deuer, S. and Rynearson, T. A. (2002)
Mesoscale distribution of dominant diatom species relative to the hydrographical field along the Antarctic Polar Front ,

Deep-Sea Research II, 49 (18), pp. 3835-3848 .

doi:10.1016/S0967-0645(02)00113-3 , hdl:10013/epic.16135

Article

Klaas, C.

and Archer, D. E. (2002)
Association of sinking organic matter with various types of mineral ballast in the deep sea: Implications for the rain ratio ,

Global Biogeochemical Cycles, 16 , pp. 1-13 .

doi:10.1029/2001GB001765 , hdl:10013/epic.22403

Article

Stoll, H. M. , Klaas, C.

, Probert, I. , Ruiz Encinar, J. and Garcia Alonso, J. I. (2002)
Calcification rate and temperature effects on Sr partitioning in coccoliths of multiple species of coccolithophorids in culture ,

Global and Planetary Change, 34 , pp. 153-171 .

hdl:10013/epic.22407

Preview

Field Report

Assmy, P. , Freier, U. , Henjes, J.

, Klaas, C.

and Smetacek, V. (2001)
Phytoplankton composition and species abundance during EISENEX ,

[Field Report]

hdl:10013/epic.19815

Article

Renaud, S. and Klaas, C.

(2001)
Seasonal variations in the morphology of the coccolithophore Calcidiscus leptoporus off Bermuda (N. Atlantic) ,

Journal of Plankton Research, 23 , pp. 779-795 .

hdl:10013/epic.22402

Article

Klaas, C.

(2001)
Spring distribution of larger (>64 µm) protozoans in the Atlantic sector of the Southern Ocean ,

Deep-Sea Research I, 48 , pp. 1627-1649 .

hdl:10013/epic.22404

Conference -Invited talk

Klaas, C.

and Archer, D. E. (2001)
Variability of POC/CaCO3 rain ratios: A case study from sediment trap data ,

U.S. JGOFS Synthesis and Modelling Project: Marine Calcification Workshop, Woods Hole, USA. .

hdl:10013/epic.22415

Conference -Talk

Andersen, N. , Schoell, M. , Carlson, R. , Schaeffer, P. , Bernasconi, S. , Hilary, A. P. , Klaas, C.

and Hunkeler, D. (2001)
Compound-specific hydrogen isotope analysis as a novel tool in petroleum geology: Examples of source-rock paleoenvironment, diagenetic alteration, hydrogen donnor, and biodegradation of petroleum hydrocarbons. ,

222nd ACS Meeting, Chicago, USA. .

hdl:10013/epic.22417

Article

Stoll, H. M. , Encinar, J. R. , Garcia Alonso, J. I. , Rosenthal, Y. , Probert, I. and Klaas, C.

(2001)
A first look at paleotemperature prospects from Mg in coccolith carbonate: Cleaning techniques and culture measurements ,

Geochemistry Geophysics Geosystems,2GC000144., 200 .

hdl:10013/epic.26396

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Conference -Talk

Klaas, C.

(1999)
Morphological and growth characteristics of Gephyrocapsa as a function of temperature conditions ,

CODENET 2nd annual Workshop. Chateau de Blagnac, France. .

hdl:10013/epic.22414

Conference -Invited talk

Klaas, C.

(1998)
Calcarious phytoplankton. ,

Alfred-Wegener-Institute for Polar and Marine Research. .

hdl:10013/epic.22413

Article

Bathmann, U. , Scharek, R. , Klaas, C.

, Dubischar, C. and Smetacek, V. (1997)
Spring development of phytoplankton biomass and composition in major water masses of the Atlantic Sector of the Southern Ocean ,

Deep-Sea Research II, 44 , pp. 51-67 .

hdl:10013/epic.10784

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Article

Klaas, C.

(1997)
Microprotozooplankton distribution and their potential grazing impact in the Antarctic Circumpolar Current ,

Deep-Sea Res II, 44 (1), pp. 375-393 .

hdl:10013/epic.12253

Thesis -PhD

Klaas, C.

(1997)
Distribution and role of microprotozoa in the Southern Ocean = Verteilung und Einfluss von herbivoren Protozoen auf Phytoplanktonbestände und Vertikalflüsse im Südpolarmeer ,

PhD thesis, Bremen University.

hdl:10013/epic.22410

Conference -Invited talk

Klaas, C.

(1997)
Distribution and grazing impact of microprotozoa in different water masses of the Southern Ocean during Austral spring ,

Rosenstiel School of Marine and Atmospheric Sciences, Miami, USA. .

hdl:10013/epic.22412

"Berichte zur Polar- und Meeresforschung" PhD

Klaas, C.

(1997)
Distribution and role of microprotozoa in the Southern Ocean = Verteilung und Einfluß von herbivoren Protozoen auf Phytoplanktonbestände und Vertikalflüsse im Südpolarmeer ,

Berichte zur Polarforschung (Reports on Polar Research), Bremerhaven, Alfred Wegener Institute for Polar and Marine Research, 253 , 119 p. .

doi:10.2312/BzP_0253_1997 , hdl:10013/epic.10256

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Conference -Poster

Kuipers, B. R. , Gonzalez, S. , Dubischar, C. , Klaas, C.

and Reitmeyer, S. (1994)
The Role of Macrozooplankton and Microheterotrophic Grazers in the Antarctic Circumpolar Current ,

1994 Ocean Sciences Meeting, ASLO, 21-25 Feb., San Diego, California, USA. .

hdl:10013/epic.22263

Conference -Talk

Klaas, C.

(1994)
Distribution and grazing activity of microzooplankton along the 6°W meridian in Antarctica ,

AGU/ALSO Ocean sciences meeting, San Diego, USA. .

hdl:10013/epic.22411