Items where Author is "De La Rocha, Christina"

Article

De La Rocha, C. , Terbrüggen, A. , Völker, C.

and Hohn, S. (2010)
Response and Recovery of Thalassiosira weissflogii to Nitrogen and Silicon Starvation: Growth Rates, Nutrient Uptake, and C, Si, and N per Cell ,

Marine Ecology Progress Series:, 412 , pp. 57-68 .

doi:10.3354/meps08701 , hdl:10013/epic.35746

Article

De La Rocha, C. , Nowald, N. and Passow, U. (2008)
Interactions between diatom aggregates, minerals, POC, and DOM: further implications for the ballast hypothesis ,

Global Biogeochemical Cycles: GB4005, 22 .

hdl:10013/epic.34387

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Article

De La Rocha, C. and Passow, U. (2007)
Factors influencing the sinking of POC and the efficiency of the biological carbon pump ,

Deep sea research II, 54 , pp. 639-658 .

doi:10.1016/j.dsr2.2007.01.004 , hdl:10013/epic.26696

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Article

Sime, N. G. , De La Rocha, C. , Tipper, E. T. , Tripati, A. , Galy, A. and Bickle, M. J. (2007)
Interpreting the Ca isotope record of marine biogenic carbonates ,

Geochimica et Cosmochimica Acta. .

doi:10.1016/j.gca.2007.06.09 , hdl:10013/epic.27088

Article

Murray, A. , Arnosti, C. , De La Rocha, C. , Grosart, H. P. and Passow, U. (2007)
Microbial dynamics in autotrophic and heterotrophic seawater mesocosms. II. Bacterioplankton community structure and hydrolytic enzyme activities. ,

Aquatic Microbial Ecology, 49 (2), pp. 123-141 .

doi:10.3354/ame01139 , hdl:10013/epic.28503

Article

Grossart, H. P. , Engel, A. , Arnosti, C. , De La Rocha, C. , Murray, A. and Passow, U. (2007)
Microbial dynamics in autotrophic and heterotrophic seawater mesocosms. III. Organic matter fluxes ,

Aquatic microbial ecology. 49(2), pp. 143-156 .

doi:10.3354/ame01140 , hdl:10013/epic.28501

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Article

De La Rocha, C. (2006)
Opal-based isotopic proxies of paleoenvironmental conditions ,

Global biogeochemical cycles, 20, GB4S09 .

doi:10.1029/2005GB002664, , hdl:10013/epic.24584

Article

Passow, U. and De La Rocha, C. (2006)
The accumulation of mineral ballast on organic aggregates ,

Global biogeochemical cycles, 20, GB1013 .

doi:10.1029/2005GB002579 , hdl:10013/epic.23430

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Article

De La Rocha, C. and Paytan, A. (2005)
Directions in the study of ocean chemistry over the Phanerozoic and its links to geologic processes ,

Marine geology .

doi:10.1016/j.margeo.2005.02.003 , hdl:10013/epic.22528

Article

Sime, N. G. , De La Rocha, C. and Galy, A. (2005)
Negligible temperature dependence of Ca isotope fractionation in 12 species of planktonic foraminifera ,

Earth and planetary science letters. .

doi:10.1016/j.epsö.2005.01.011 , hdl:10013/epic.22427

Article

De La Rocha, C. and Bickle, M. J. (2005)
Sensitivity of silicon isotopes to whole-ocean changes in the silica cycle ,

Marine geology. .

doi:10.1016/j.margeo.2004.11.016 , hdl:10013/epic.22529

Article

De La Rocha, C. and Passow, U. (2004)
Recovery of Thalassiosira weissflogii from nitrogen and silicon starvation ,

Limnology and oceanography:, 49 (1), pp. 245-255 .

hdl:10013/epic.20529

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Article

De La Rocha, C. (2003)
Silicon isotope fractionation by marine sponges and the reconstruction of the silicon isotope composition of ancient deep water ,

Geology,31426., 423 .

hdl:10013/epic.22425

Article

De La Rocha, C. (2002)
Measurement of variations in silicon stable isotope natural abundances via multi-collector inductively coupled plasma mass spectrometry (MC-ICP-MS) ,

Geochemistry geophysics geosystems. .

doi:10.1029/2002GC000310 , hdl:10013/epic.22424

Article

De La Rocha, C. (2002)
Tracing the silica cycle with silicon isotopes ,

Oceanis, 28 , pp. 369-382 .

hdl:10013/epic.23024

Article

De La Rocha, C. , Hutchins, D. A. , Brzezinski, M. A. and Zhang, Y. (2000)
Effects of iron and zinc deficiency on elemental composition and silica production by diatoms ,

Marine ecology-progress series, 195 , pp. 71-79 .

hdl:10013/epic.22423

Article

De La Rocha, C. and DePaolo, D. J. (2000)
Isotopic evidence for variations in the marine Ca cycle over the Cenozoic ,

Science, 289 , pp. 1176-1178 .

hdl:10013/epic.22421

Article

De La Rocha, C. , Brzezinski, M. A. and DeNiro, M. J. (2000)
A first look at the distribution of the stable isotopes of silicon in natural waters ,

Geochimica et cosmochimica acta, 64 , pp. 2467-2477 .

hdl:10013/epic.22422

Article

De La Rocha, C. , Brzezinski, M. A. , DeNiro, M. J. and Shemesh, A. (1998)
Silicon-isotope composition of diatoms as an indicator of past oceanic change ,

Nature, 395 , pp. 680-683 .

hdl:10013/epic.22420

Article

De La Rocha, C. , Brzezinski, M. A. and DeNiro, M. J. (1997)
Fractionation of silicon isotopes by marine diatoms during biogenic silica formation ,

Geochimica et cosmochimica acta, 61 , pp. 5051-5056 .

hdl:10013/epic.22419

Article

De La Rocha, C. , Brzezinski, M. A. and DeNiro, M. J. (1996)
Purification, recovery, and laser-driven fluorination of silicon from dissolved and particulate silica for the measurement of natural stable isotope abundances ,

Analytical chemistry, 68 , pp. 3746-3750 .

hdl:10013/epic.22418

Inbook

De La Rocha, C. , Hoff, C. J. and Bryce, J. B. (2007)
The Biogeochemical Cycling of Calcium: the Ecological Consequences of Anthropogenic Emissions ,

Encyclopedia of Ecology, S.E. Jorgensen (Editor), Elsevier. .

hdl:10013/epic.30959

Inbook

De La Rocha, C. (2006)
Silicon Isotope-Based Reconstructions of the Silicon Cycle ,

The silicon cycle : human perturbations and impacts on aquatic systems / ed. by Venugopalan Ittekkot ... Washington, DC [u.a.] : Island Press. (Scope ; 66), ISBN: 1-597-26114-9 .

hdl:10013/epic.26716

Inbook

De La Rocha, C. (2003)
The Biological Pump ,

Treatise on Geochemistry: The Oceans and Marine Geochemistry .

hdl:10013/epic.22426

Conference -Poster

Sweet, E. , De La Rocha, C. , Wolf-Gladrow, D.

, Passow, U. and Richter, K. U. (2009)
C isotopic composition of particulate organic matter by size fraction in the Southern Ocean ,

ASLO .

hdl:10013/epic.32888

Conference -Talk

De La Rocha, C. , Sime, N. G. , Tipper, E. T. , Tripati, A. , Galy, A. and Bickle, M. J. (2007)
Can seawater concentrations of Ca2+ be reconstructed from downcore Ca isotope records? ,

97th Meeting of the Geologische Vereinigung, paper A .

hdl:10013/epic.32600

Conference -Poster

Jacot Des Combes, H. , De La Rocha, C. , Esper, O.

, Abelmann, A. , Gersonde, R. and Shemesh, A. (2007)
Diatom d13C, d15N, and C/N Since the Last Glacial Maximum in the Southern Ocean: Evidence for Regional and Ecological Influences ,

2007 Goldschmidt Conference, August 2007, Cologne. .

hdl:10013/epic.30025

Conference -Talk

Passow, U. , De La Rocha, C. , Arnosti, C. , Grossart, H. P. , Murray, A. E. and Engel, A. (2007)
Overview of a mesocosm experiment investigating the impact of phytoplankton on the microbial loop ,

American Society of Limnology and Oceanography 2007: Aquatic Sciences Meeting: Water Rocks! Santa Fe, New Mexico. .

hdl:10013/epic.26309

Conference -Invited talk

De La Rocha, C. , Moritz, S. , Wolf-Gladrow, D.

and Lohmann, G.

(2007)
Understanding the Distribution and Behavior of Si Isotopes in the Ocean ,

American Geophysical Union Fall Meeting 2007, paper OS24B-01. .

hdl:10013/epic.32599

Conference -Invited talk

De La Rocha, C. (2007)
Understanding the distribution and behaviour of Si isotopes in the ocean ,

GEOTRACES Data-Model Synergy Workshop Hanse Wissenschaftskolleg, Delmenhorst, Germany 6-8 September .

hdl:10013/epic.32601

Conference -Poster

Mantoura, S. , De La Rocha, C. , Galy, A. , Elderfield, H. and Shemesh, A. (2006)
The Ge isotopic composition of diatom opal ,

2006 Ocean Sciences Meeting, Feb. 2006, Honolulu, USA. .

hdl:10013/epic.24579

Conference -Talk

Passow, U. and De La Rocha, C. (2005)
Carrying capacity of organic aggregates for different types of ballast minerals ,

EGU, Wien April 2005 .

hdl:10013/epic.23425

Conference -Invited talk

De La Rocha, C. , Jacot Des Combes, H. , Gersonde, R. and Abelmann, A. (2005)
The O, Si, and N Isotopic Composition of Sedimentary Opal: A Status Report ,

Biogeochemical Controls on Palaeocenographic Proxies, 3-4 Oct 2005, Burlington House, Geological Society, London, England. .

hdl:10013/epic.24591

Conference -Talk

Mantoura, S. , Galy, A. , De La Rocha, C. , Elderfield, H. and Shemesh, A. (2005)
A germanium isotope record from diatom opal ,

2005 Fall Meeting of the American Geophysical Union (AGU), Dec. 2005, San Francisco, USA. .

hdl:10013/epic.24578

Conference -Invited talk

Gersonde, R. , Abelmann, A. , Bianchi, C. , Cortese, G. , De La Rocha, C. , Esper, O.

, Kohno, M. and Kunz-Pirrung, M. (2005)
The link between Antarctica and the Southern Ocean ,

ESF Conference Polar and Quaternary Climate, 24.-29. Sept. 2005, Acquafredda di Maratea, Italy. .

hdl:10013/epic.24672

Conference -Talk

Galy, A. , Rouxel, O. , Mantoura, S. , Elderfield, H. and De La Rocha, C. (2004)
An estimate of the Ge isotopic composition of the ocean ,

2004 Fall Meeting of the American Geophysical Union (AGU), Dec 2004, San Francisco, USA. .

hdl:10013/epic.24580

Conference -Poster

Sime, N. G. , De La Rocha, C. and Galy, A. (2003)
Core-top calibration of temperature dependent Ca isotope fractionation for 10 species of planktonic foraminifera ,

2003 Fall Meeting of the American Geophysical Union (AGU), Dec 2003, San Francisco, USA. .

hdl:10013/epic.24581

Conference -Invited talk

De La Rocha, C. (2003)
Diatoms and the evolution of a Si-limited surface to a Si-replete ocean. ,

The Role of Diatom Production and Si Flux and Burial in the Regulation of Global Cycles (AGU Chapman Conference), Sept. 2003, Paros, Greece. .

hdl:10013/epic.24605

Conference -Poster

Mataliotaki, I. , De La Rocha, C. , Passow, U. and Wolf-Gladrow, D.

(2003)
Impact of the pH dependant speciation of silicic acid on silicon isotope composition of diatoms ,

Poster, EGS, AGU & EUG Joint assembly meeting, Nizza, France, April 2003. .

hdl:10013/epic.19531

Conference -Poster

Mataliotaki, I. , De La Rocha, C. , Passow, U. and Wolf-Gladrow, D.

(2003)
Impact of the pH-dependent speciation of silicic acid on the silicon isotopic composition of diatoms ,

Poster,EGS - AGU - EUG Joint Assembly,Nice, France, 07 - 11 April 2003. .

hdl:10013/epic.19072

Conference -Invited talk

Wischmeyer, A. G. , De La Rocha, C. , Maier-Reimer, E. and Wolf-Gladrow, D.

(2003)
Stable silicon isotopes as a proxy of silicon utilization in the Southern Ocean ,

Invited Talk,EGS - AGU - EUG Joint Assembly, Nice,France, 07 - 11 April 2003. .

hdl:10013/epic.19071

Conference -Invited talk

De La Rocha, C. and Bickle, M. J. (2003)
What can we see: sensitivity of silicon isotopes to perturbations of the silica cycle ,

2003 Annual Meeting of the Geological Society of America (GSA), Oct 2003, Seattle, USA. .

hdl:10013/epic.24595

Conference -Talk

De La Rocha, C. and Passow, U. (2003)
The advantages to silicon limitation ,

ASLO 2003 Aquatic Sciences Meeting Salt Lake City USA. .

hdl:10013/epic.24777

Conference -Talk

De La Rocha, C. and Botting, J. (2002)
Reconstruction of the silica cycle over the Phanerozoic from the Si isotopic composition of sponges ,

2002 Ocean Sciences Meeting, Feb 2002, Honolulu, USA. .

hdl:10013/epic.24586

Conference -Talk

De La Rocha, C. (2002)
Tracing the Silica Cycle with Silicon Isotopes ,

The Biogeochemical Silica Cycle: Elemental to Global Scales, Conference at the Institut Oceanographique, 22 Oct 2002, Paris, France. .

hdl:10013/epic.24587

Conference -Talk

De La Rocha, C. , Pride, C. , Brzezinski, M. A. and DeNiro, M. J. (2001)
Si Isotope-Based Reconstruction of Diatom Utilization of Si ,

William Smith Meeting of the Geological Society, April 2001, Burlington House, London, England. .

hdl:10013/epic.24589

Conference -Talk

De La Rocha, C. and DePaolo, D. J. (1999)
Variations in the isotopic composition of marine calcium over the last 160 Ma. ,

Ninth Annual Goldschmidt Conference, Boston, USA. .

hdl:10013/epic.24603

Conference -Talk

De La Rocha, C. , Brzezinski, M. A. and DeNiro, M. J. (1998)
Towards an improved proxy for silicic acid utilization: construction of global silicon isotope budgets. ,

1998 Fall Meeting of the American Geophysical Union (AGU), Dec 1998, San Francisco, USA. .

hdl:10013/epic.24602

Conference -Talk

De La Rocha, C. , Brzezinski, M. A. , DeNiro, M. J. and Shemesh, A. (1997)
Lower silicic acid utilization in the glacial Southern Ocean revealed by silicon isotope natural abundances. ,

1997 Fall Meeting of the American Geophysical Union (AGU), San Francisco, USA. .

hdl:10013/epic.24601

Conference -Talk

De La Rocha, C. , Brzezinski, M. A. , DeNiro, M. J. and Shemesh, A. (1997)
Silicon isotope ratios in biogenic silica as a paleoproductivity proxy: the first results. ,

1997 Spring Meeting of the American Geophysical Union (AGU), Baltimore, USA. .

hdl:10013/epic.24600

Conference -Talk

De La Rocha, C. , Brzezinski, M. A. and DeNiro, M. J. (1996)
Silicon isotope ratios in marine biogenic silica and seawater ,

1996 Ocean Sciences Meeting, Feb 1996, San Diego, USA. .

hdl:10013/epic.24599

Conference -Talk

De La Rocha, C. , Brzezinski, M. A. and DeNiro, M. J. (1994)
Quantitative recovery of dissolved and biogenic silicon as SiO2 ,

1994 Ocean Sciences Meeting, Feb. 1994, San Diego, USA. .

hdl:10013/epic.24597