Items where Author is "Piontek, Judith"

Article

Piontek, J. , Galgani, L. , Nöthig, E. M.

, Peeken, I.

and Engel, A. (2020)
Organic matter composition and heterotrophic bacterial activity at declining summer sea ice in the central Arctic Ocean ,

Limnology and Oceanography, pp. 1-20 .

doi:10.1002/lno.11639 , hdl:10013/epic.2a53a98c-32f3-4151-a00a-54a4cc116d7e

Article

Engel, A. , Bracher, A. , Dinter, T. , Endres, S. , Grosse, J. , Metfies, K.

, Peeken, I. , Piontek, J. , Salter, I. and Nöthig, E. M.

(2019)
Inter-Annual Variability of Organic Carbon Concentration in the Eastern Fram Strait During Summer (2009–2017) ,

Frontiers in Marine Science .

doi:10.3389/fmars.2019.00187 , hdl:10013/epic.d144b85f-c4e1-474b-bf7c-02487b4f7f3f

Article

Fadeev, E.

, Salter, I.

, Schourup-Kristensen, V. , Metfies, K.

, Nöthig, E. M.

, Engel, A. , Piontek, J. , Boetius, A.

and Bienhold, C.

(2018)
Microbial Communities in the East and West Fram Strait During Sea Ice Melting Season ,

Frontiers in Marine Science .

doi:10.3389/fmars.2018.00429 , hdl:10013/epic.c75ca22f-ac8c-48a4-83ab-c29a96ddcd0f

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Article

Attard, K. M. , Søgaard, D. H. , Piontek, J. , Lange, B. A. , Katlein, C.

, Sørensen, H. L. , McGinnis, D. F. , Rovelli, L. , Rysgaard, S. , Wenzhöfer, F.

and Glud, R. N. (2018)
Oxygen fluxes beneath Arctic land-fast ice and pack ice: towards estimates of ice productivity ,

Polar Biology .

doi:10.1007/s00300-018-2350-1 , hdl:10013/epic.ed1ac0b7-024d-4743-b49c-f44b90355d93

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Article

Engel, A. , Piontek, J. , Metfies, K.

, Endres, S. , Peeken, I.

, Gäbler-Schwarz, S. and Nöthig, E. M.

(2017)
Inter-annual variability of transparent exopolymer particles in the Arctic Ocean reveals high sensitivity to ecosystem changes ,

Scientific Reports, 7 (4129) .

doi:10.1038/s41598-017-04106-9 , hdl:10013/epic.51718

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Article

Sperling, M. , Piontek, J. , Engel, A. , Wiltshire, K. H.

, Niggemann, J. , Gerdts, G.

and Wichels, A.

(2017)
Combined carbohydrates support rich communities of particle-associated marine bacterioplankton ,

Frontiers in Microbiology .

doi:10.3389/fmicb.2017.00065 , hdl:10013/epic.50632

Article

Galgani, L. , Piontek, J. and Engel, A. (2016)
Biopolymers form a gelatinous microlayer at the air-sea interface when Arctic sea ice melts ,

Scientific Reports, 6 , p. 10 .

hdl:10013/epic.51112

Article

Nöthig, E. M.

, Bracher, A.

, Engel, A. , Metfies, K.

, Niehoff, B. , Peeken, I.

, Bauerfeind, E. , Cherkasheva, A. , Gäbler-Schwarz, S. , Hardge, K. , Kilias, E. , Kraft, A. , Mebrahtom Kidane, Y. , Lalande, C. , Piontek, J. , Thomisch, K.

and Wurst, M. (2015)
Summertime plankton ecology in Fram Strait - a compilation of long- and short-term observations ,

Polar Research, 34 .

doi:10.3402/polar.v34.23349 , hdl:10013/epic.46457

Article

Piontek, J. , Sperling, M. , Nöthig, E. M.

and Engel, A. (2015)
Multiple environmental changes induce interactive effects on bacterial degradation activity in the Arctic Ocean ,

Limnology and Oceanography, 60 (4), pp. 1392-1410 .

doi:10.1002/lno.10112 , hdl:10013/epic.46265

Article

Piontek, J. , Sperling, M. , Nöthig, E. M.

and Engel, A. (2014)
Regulation of bacterioplankton activity in Fram Strait (Arctic Ocean) during early summer: The role of organic matter supply and temperature ,

Journal of Marine Systems, 132 , pp. 83-94 .

doi:10.1016/j.jmarsys.2014.01.003 , hdl:10013/epic.43193

Article

Engel, A. , Piontek, J. , Grossart, H. P. , Riebesell, U. , Schulz, K. G. and Sperling, M. (2014)
Impact of CO2 enrichment on organic matter dynamics during nutrient induced coastal phytoplankton blooms ,

Journal of Plankton Research, 36 (3), pp. 641-657 .

hdl:10013/epic.51107

Article

Engel, A. , Borchard, C. , Piontek, J. , Schulz, K. G. , Riebesell, U. and Bellerby, R. (2013)
CO2 increases C-14 primary production in an Arctic plankton community ,

Biogeosciences, 10 (3), pp. 1291-1308 .

doi:10.5194/bg-10-1291-2013 , hdl:10013/epic.51100

Article

Motegi, C. , Tanaka, T. , Piontek, J. , Brussaard, C. , Gattuso, J. P. and Weinbauer, M. G. (2013)
Effect of CO2 enrichment on bacterial metabolism in an Arctic fjord ,

Biogeosciences, 10 (5), pp. 3285-3296 .

doi:10.5194/bg-10-3285-2013 , hdl:10013/epic.51102

Article

Sperling, M. , Piontek, J. , Gerdts, G.

, Wichels, A.

, Schunk, H. , Roy, A. , La Roche, J. , Gilbert, J. , Nissimov, J. , Bittner, L. , Romac, S. , Riebesell, U. and Engel, A. (2013)
Effect of elevated CO2 on the dynamics of particle-attached and free-living bacterioplankton communities in an Arctic fjord ,

Biogeosciences, 10 , pp. 181-191 .

doi:10.5194/bg-10-181-2013 , hdl:10013/epic.40684

Article

Piontek, J. , Borchard, C. , Sperling, M. , Schulz, K. G. , Riebesell, U. and Engel, A. (2013)
Response of bacterioplankton activity in an Arctic fjord system to elevated pCO2: results from a mesocosm pertubation study ,

Biogeosciences, 10 (1), pp. 297-314 .

doi:10.5194/bg-10-297-2013 , hdl:10013/epic.51103

Article

Piontek, J. , Lunau, M. , Händel, N. , Borchard, C. , Wurst, M. and Engel, A. (2010)
Acidification increases microbial polysaccharide degradation in the ocean ,

Biogeosciences, 71624., 1615 .

hdl:10013/epic.35262

Article

Harlay, J. , Chou, L. , De Bodt, C. , Van Oostende, N. , Piontek, J. , Suykens, K. , Engel, A. , Sabbe, K. , Groom, S. , Delille, B. and Borges, A. V. (2010)
Biogeochemistry and carbon mass balance of a coccolithophore bloom in the northern Bay of Biscay (June 2006) ,

Deep Sea Research I, 58 , pp. 111-127 .

hdl:10013/epic.36727

Article

Harlay, J. , De Bodt, C. , Engel, A. , Jansen, S. , d'Hoop, Q. , Piontek, J. , Van Oostende, N. , Groom, S. , Sabbe, K. and Chou, L. (2009)
Abundance and size distribution of transparent exopolymer particles (TEP) in a coccolithophorid bloom in the northern Bay of Biscay ,

Deep Sea Research I., 56 , pp. 1251-1265 .

doi:10.1016/j.dsr.2009.01.014 , hdl:10013/epic.33297

Article

Piontek, J. , Händel, N. , Langer, G. , Wohlers, J. , Riebesell, U. and Engel, A. (2009)
Effects of rising temperature on the formation and microbial degradation of marine diatom aggregates ,

Aquatic Microbial Ecology:, 54 , pp. 305-318 .

doi:10.3354/ame01273 , hdl:10013/epic.32447

Thesis -PhD

Piontek, J. (2009)
Effects of temperature and pCO2 on the degradation of organic matter in the ocean ,

PhD thesis, University of Bremen.

hdl:10013/epic.34349

Conference -Invited talk

Nöthig, E. M.

, Bauerfeind, E. , Bergmann, M.

, Bracher, A.

, Bienhold, C.

, Engel, A. , Fadeev, E.

, Fahl, K.

, Geibert, W.

, Hasemann, C. , Iversen, M.

, Jacob, M. , Lalande, C.

, Metfies, K.

, Salter, I.

, Peeken, I.

, Piontek, J. , Ramondenc, S. , Rapp, J. Z.

, Schewe, I.

, Wenzhöfer, F.

, Boetius, A.

and Soltwedel, T.

(2019)
Long-Term Summertime Investigations of Pelagic and Benthic Realms with Continuous Observations of Vertical Particle Flux in the Fram Strait and the Central Arctic Ocean ,

Goldschmidt Barcelona 2019, Barcelona, Spain, 18 August 2019 - 23 August 2019 .

hdl:10013/epic.b406523e-a4fd-424c-a487-9e57b6ec7140

[thumbnail of Noethig_et_al_2019_Goldschmidt.pdf]

Preview

Conference -Talk

Metfies, K.

, Noethig, E. M.

, Bracher, A.

, Engel, A. , Niehoff, B. , Peeken, I.

, Bauerfeind, E. , Cherkasheva, A. , Gaebler-Schwarz, S. , Hardge, K. , Kilias, E. , Kraft, A. , Lalande, C. , Piontek, J. , Thomisch, K.

and Wurst, M. (2013)
Phytoplankton Ecology and Biogeochemistry in a Changing Arctic Ocean - Molecular Genetics meets Biological Oceanography ,

When Genetics Meets Oceanography, Observatoire Oceanologique Université Pierre et Marie Curie & Centre national de la recherche Scientifique, Banyuls sur Mer, France, 14 October 2013 - 16 October 2013 .

hdl:10013/epic.42553

Conference -Poster

Harlay, J. , Chou, L. , DeBodt, C. , vanOostende, N. , Piontek, J. , Engel, A. , Sabbe, K. , Groom, S. and Borges, A. V. (2011)
Biogeochemistry and carbon mass balance of a coccolithophore bloom in the northern Bay of Biscay (June 2006) ,

European Geosciences Union, General Assembly, 3.-8.4.2011, Vienna, Austria. .

hdl:10013/epic.37182

Conference -Invited talk

Engel, A. , Borchard, C. , Bellerby, R. , Klavsen, S. , Piontek, J. , Riebesell, U. and Schulz, K. (2011)
Sensitivity of DOC production to pCO2 in arctic pelagic communities: Insights from the 2010 Svalbard mesocosm study ,

EPOCA Third Annual Meeting, Royal Academy of Belgium for Science and the Arts, BrusselsMay .

hdl:10013/epic.37519

Conference -Talk

Piontek, J. , Händel, N. , Sperling, M. , Riebesell, U. and Engel, A. (2010)
Effects of rising seawater CO2 on the bacterial turnover of organic matter in temperate marine systems ,

13th ISME Symposium, Seattle. .

hdl:10013/epic.35849

Conference -Talk

Harlay, J. , Borges, A. V. , Delille, B. , Suykens, K. , De Bodt, C. , Sabbe, K. , van Oostende, N. , Engel, A. , Piontek, J. and Chou, L. (2010)
Towards a comprehensive C-budgeting approach of a cocoliothophorid bloom in the northern Bay of Biscay: results from PEACE projec ,

XII International Symposium on Oceanography of the Bay of Biscay, 3-6-May, Brest, France. .

hdl:10013/epic.35277

Conference -Poster

Harlay, J. , Borges, A. V. , De Bodt, C. , Van Oostende, N. , Piontek, J. , Suykens, K. , Engel, A. , Sabbe, K. , Groom, S. and Chou, L. (2009)
Biogeochemistry and carbon budget during a coccolithophorid bloom in the northern Bay of Biscay (June 2006) ,

EGU General Assembly, Vienna, AustriaApril. .

hdl:10013/epic.32805

Conference -Poster

Händel, N. , Piontek, J. , Harlay, J. , de Bodt, C. , Chou, L. and Engel, A. (2009)
Dynamics of polysaccharides and transparent exopolymer particles during a coccolithophore bloom in the Bay of Biscay ,

ASLO, Aquatic Sciences Meeting 2009, Nice. .

hdl:10013/epic.31840

Conference -Poster

Chou, L. , Harlay, J. , De Bodt, C. , Roevros, N. , Borges, A. V. , Suykens, K. , Delille, B. , Sabbe, K. , Van Oostende, N. , Engel, A. , Piontek, J. , Borchard, C. , Händel, N. and Groom, S. (2009)
Role of pelagic calcification and export of carbonate production in climate change ,

SOLAS Open Science Conference, Barcelona .

hdl:10013/epic.34355

Conference -Poster

Piontek, J. , Händel, N. , Borchard, C. , Lunau, M. , Chou, L. and Engel, A. (2009)
The significance of bacterial polysaccharide degradation for carbon export, today and in the future ocean ,

ASLO Conference, NiceJanuary .

hdl:10013/epic.31903

Conference -Poster

Chou, L. , Harlay, J. , De Bodt, C. , Roevros, N. , Borges, A. V. , Suykens, K. , Delille, B. , Sabbe, K. , Van Oostende, N. , Engel, A. , Piontek, J. , Borchard, C. , Händel, N. , Schmidt, S. and Groom, S. (2008)
BIOGEOCHEMICAL INVESTIGATIONS OF COCCOLITHOPHORE BLOOMS ALONG THE CONTENTAL MARGIN OF THE NORTHERN BAY OF BISCAY: HIGHLIGHTS OF THE PEACE PROJECT ,

Second International Symposium on the Ocean in a High CO2 World, Monaco. .

hdl:10013/epic.31241

Conference -Talk

Chou, L. , Harlay, J. , De Bodt, C. , Roevros, N. , Borges, A. V. , Suykens, K. , Delille, B. , Sabbe, K. , Van Oostende, N. , Engel, A. , Piontek, J. , Händel, N. , Groom, S. and Schmidt, S. (2008)
Biogeochemistry of Coccolithophore Blooms along the Continental Margin of the Northern Bay of Biscay. ,

Eur-Oceans Final Meeting, RomeNovember 2008. .

hdl:10013/epic.32409

Conference -Talk

Van Oostende, N. , Vyverman, W. , Harlay, J. , De Bodt, C. , Chou, L. , Suykens, K. , Borges, A. V. , Piontek, J. , Engel, A. and Sabbe, K. (2008)
Coccolithophore bloom dynamics shape bacterioplankton communities in the northern Bay of Biscay. ,

The 12th International Symposium on Microbial Ecology (ISME 12), Cairns, AustraliaAugust 2008. .

hdl:10013/epic.32410

Conference -Poster

Händel, N. , Piontek, J. , Wohlers, J. , Riebesell, U. and Engel, A. (2008)
Dynamics of dissolved neutral and acidic sugars in seawater ,

Ocean Science Meeting, March 2-7, 2008, Orlando, Florida.. .

hdl:10013/epic.30206

Conference -Poster

Piontek, J. , Händel, N. , Lunau, M. , Borchard, C. and Engel, A. (2008)
Effects of ocean acidification on the bacterial degradation of organic matter ,

Second International Symposium on the ocean in a high-CO2 world, October 6-9, 2008, Monaco. .

hdl:10013/epic.31275

Conference -Talk

Piontek, J. , Borchard, C. , Händel, N. and Engel, A. (2008)
Effects of rising CO2 on microbial degradation of organic matter derived from coccolithophores ,

PEACE annual workshop, February 2008, Brussels. .

hdl:10013/epic.30157

Conference -Talk

Borchard, C. , Piontek, J. , Händel, N. and Engel, A. (2008)
Investigating the combined effect of pCO2 and temperature on Emiliania huxleyi using a chemostat system ,

PEACE annual workshop, February 2008, Brussels. .

hdl:10013/epic.30161

Conference -Poster

Lunau, M. , Wurst, M. , Piontek, J. , Grossart, H. P. , Riebesell, U. and Engel, A. (2008)
Potential effects of ocean acidification on microbial organic matter degradation during an offshore mesocosm experiment ,

Ocean Science Meeting, March 2-7, 2008, Orlando, Florida. .

hdl:10013/epic.30199

Conference -Poster

Lunau, M. , Wurst, M. , Piontek, J. , Grossart, H. P. , Riebesell, U. and Engel, A. (2008)
Potential effects of ocean acidification on microbial organic matter degradation during an offshore mesocosm experiment. ,

SOPRAN Annual Meeting 2008, Warnemünde, Germany. .

hdl:10013/epic.30202

Conference -Talk

Schartau, M. , Engel, A. , Piontek, J. and Rost, B.

(2007)
CO2 sensitivities: DOC production and acidification ,

Modelling the response of marine ecosystems to increasing levels of CO2. Modelling Workshop, 12-14 February 2007, Plymouth, U.K.. .

hdl:10013/epic.27876

Conference -Poster

Piontek, J. , Lunau, M. , Händel, N. , Jansen, S. , Neu, T. and Engel, A. (2007)
Effects of rising temperature and decreasing pH on degradation activity of marine bacterioplankton ,

10th Symposium on Aquatic Microbial Ecology, September 2-7 2007, Faro, Portugal. .

hdl:10013/epic.27689

Conference -Talk

Piontek, J. , Händel, N. and Engel, A. (2007)
Effects of rising temperature and pCO2 on bacterial degradation processes in marine systems ,

European Geosciences Union, General Assembly 2007, Vienna.-20.4.2007. .

hdl:10013/epic.26808

Conference -Talk

Piontek, J. , Händel, N. and Engel, A. (2007)
Effects of temperature on the microbial decomposition of particle aggregates in the ocean ,

42nd European Marine Biology Symposium, August 27-31 2007, Kiel, Germany. .

hdl:10013/epic.27690

Conference -Talk

Lunau, M. , Koch, S. , Piontek, J. , Händel, N. and Engel, A. (2007)
Investigating the effects of changes in CO2 concentration on marine plankton dynamics with batch and chemostat systems ,

42nd EMBS, August 27-31 2007, Kiel, Germany .

hdl:10013/epic.27651

Conference -Talk

Piontek, J. , Händel, N. , Lunau, M. and Engel, A. (2007)
Investigating the effects of changing CO2 concentration on a natural marine plankton community using a chemostat system ,

International Union of Geodesy and Geophysics, General Assembly, Perugia, July 2-13 .

hdl:10013/epic.26958

Conference -Poster

Piontek, J. , Langer, G. , Händel, N. , Riebesell, U. , Wohlers, J. and Engel, A. (2006)
Effects of rising temperature on the decomposition of phytoplankton aggregates ,

3rd AQUASHIFT workshop, 14.-16.11.2006, Kiel. .

hdl:10013/epic.25955

Conference -Poster

Piontek, J. , Langer, G. , Händel, N. , Riebesell, U. and Engel, A. (2006)
Effects of rising temperature on the microbial decomposition of sinking organic material in the surface ocean ,

ESSP Global Change Open Science Conference, 9.-12.11.2006, Beijing, China. .

hdl:10013/epic.26013

Conference -Poster

Engel, A. , Langer, G. , Piontek, J. , Händel, N. and Szlosek, J. (2005)
Wie verändert sich die Biogeochemie des Ozeans im Anthropozaen? ,

Wissenswerte, 28.-30.11.2005, Bremen, Germany. .

hdl:10013/epic.24959