Professor Ursula Witte

Professor Ursula Witte

Chair in Zoology

Overview
Professor Ursula Witte
Professor Ursula Witte

Contact Details

Telephone
work +44 (0)1224 274413
Fax
fax 0044 1224 274402
Email
Address
The University of Aberdeen Cruickshanks Bdg.
room 2.14
St. Machar Drive
Aberdeen
Research

Research Overview

Benthic ecosystem functioning, anthropogenic impacts and climate change

The Witte group investigates the functioning of benthic marine ecosystems and benthic-pelagic coupling  from the deep ocean floor to the intertidal, with a current focus on consequences of both anthropogenic activities  and climate change.

This often includes  the development of new research technologies, and one focus of ongoing work is the development of a pressurised coring, incubation and cultivation system for the study of biogeochemical processes and piezophile  microorganisms from the deep seafloor under varying environmental conditions (pH, T, O2 etc).

Sea ice is a unique feature of polar marine ecosystems and the fact that small temperature differences can have large effects on the extent and thickness of this sea ice makes polar marine ecosystems particularly sensitive to climate change.  The group’s  work on climate change impacts on benthic ecosystem functioning is therefore centred in both the Arctic and the Antarctic peninsula where change is particularly rapid.

In many cases, stable isotope tracing experiments, often carried out in situ at the deep-sea floor,  help us track the pathway of organic matter, in particular C and N,  through the benthic community and thus understand the spatial and temporal dynamics of biological and geochemical transformations of matter in benthic and benthopelagic foodwebs.

But we also work closer to home: Aberdeen is often referred to as the ‘oil capital of Europe’, and with hydrocarbon extraction now occurring down to 1100 m in the Faroe Shetland Channel, a need arises to understand the consequences of accidental releases in Scottish deep water environments in order to improve monitoring and optimize response measures after a spill. Several ongoing projects therefore investigate the rates and pathways of hydrocarbon degradation in Scottish Waters, as well as the microorganisms involved.

 

 

Research Funding and Grants

Transformation of Antarctic Benthic Food Webs on the Larsen Ice Shelf following Loss of Sea-Ice Cover (TABOSI). 2019-2021. Polarstern Nebennutzerantrag. PI Witte. 

Benthic biodiversity under Antarctic ice-shelves - baseline assessment of the seabed exposed by the 2017 calving of the Larsen-C Ice Shelf. NERC urgency application; 2018-19, CoI, PI Linse.

Continuous observation of deep-sea benthic community structure and benthic-pelagic coupling throughout the polar night and summer ice melt.   NERC Arctic office. PI Witte 2017-2018

Using the intrinsic recovery capabilities of deep-sea and polar ecosystems to reduce the impact of accidental oil release. NERC Oil and Gas DTP. PI Witte, 2014-2018

Increasing oil spill preparedness for Scottish deep waters  - the role of sediments in a deep water oil spill. MarCRF. PI Witte with A. Gallego and J. Anderson. 2014-2018

Fate and flow of oil carbon in the marine food web – towards efficient monitoring of oil contamination. NERC  CASE PhD studenthsip 2014- 2018.  PI Witte

The natural capacity for oil degradation of marine environments.   NERC PI Witte with J. Anderson and E. Gontikaki. £98,871, 2013-2015.

ArcDeep: Deep-sea ecosystem functioning in a changing climate: consequences of changing sea-ice cover for Arctic benthic ecosystems . NERC standard grant proposal; PI Witte, with F. Kuepper. £508,490, Appr. 2013 – 2017

MAC-EXP: A pressurised coring, experimentation and cultivation system for deep-sea sedimentary ecosystems. NERC Technology-led standard grant.2012-2014. Lead: Witte (Aberdeen), with Parkes, (Cardiff). Awarded. £552000. 2013- 2017.

PharmaSea: Planet Ocean – Streamlining the Marine Biodiscovery Pipeline.  EC FP7-KBBE-2012-6(PI: M Jaspers. Total volume 10 Mio €. Aberdeen: € 725000. 2012- 2017

"The role of micronutrients in deep-sea carbon cycling".  The Leverhulme Trust, 2007 -2010

Bacterial Diversity and Carbon Turnover at the Abyssal Seafloor –proposal to apply 454-based tag sequencing technology to deep-sea sediments. Keck foundation – 2008/ 2009.

"Rates and pathways of carbon cycling at the abyssal sea floor: a long-term, in situ experimental study". NERC, 2007-2010

HERMIONE –– Hotspot Ecosystem Research at Continental Margins; April 2009- September  2012.

Carnegie Trust – Development of Scottish resources for seafloor biogeochemical process studies. August 2008 – July 2010. £29800

"Nutrient regeneration in North Sea coastal sediments". FRF, 2006-2009

"Carbon turnover and trophic relationships in theabyssal Pacific", NERC-LSMSF, 2007/08

COBO - Towards a Coastal Ocan Benthic Observatory  (EC) 2004 - 2007

Teaching

Teaching Responsibilities

SX1015 The Oceans and Society in a changing environment. 6th century course. Course coordinator and coordiantor theme 1.

BI 1006 BUGS (Biology for Undergraduates) tutor Marine Biology

BI25Z4 Ocean Biology

ZO3306 Marine Ecology and Ecosystems

BI39Z1 Marine Ecology Florida field course

ZO4542 Marine Benthic Ecology

BI4517, BI4017 SBS Honours Essay

BI4016 SBS Honours Project

 

Publications

Publications 

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  • No strong evidence of priming effects on the degradation of terrestrial plant detritus in estuarine sediments

    Gontikaki, E., Witte, U.

    Frontiers in Marine Science, vol. 6, 327

    Contributions to Journals: Articles

  • On the Effects of Acid Pre-treatment on the Elemental and Isotopic Composition of Lightly- and Heavily-calcified Marine Invertebrates

    Kazanidis, G., Bourgeois, S., Witte, U. F. M.

    Ocean Science Journal, vol. 54, no. 2, pp. 257-270

    Contributions to Journals: Articles

  • Pressure and temperature effects on deep‐sea hydrocarbon‐degrading microbial communities in subarctic sediments

    Perez Calderon, L. J., Gontikaki, E., Potts, L. D., Shaw, S., Gallego, A., Anderson, J. A., Witte, U.

    MicrobiologyOpen, vol. 8, no. 6, e00768

    Contributions to Journals: Articles

  • Characterisation of microbial communities of drill cuttings piles from offshore oil and gas installations

    Potts, L. D., Perez Calderon, L. J., Gubry-Rangin, C., Witte, U., Anderson, J. A.

    Marine Pollution Bulletin, vol. 142, pp. 169-177

    Contributions to Journals: Articles

  • Effects of Superdispersant-25 on the sorption dynamics of naphthalene and phenanthrene in marine sediments

    Perez Calderon, L. J., Potts, L. D., Gallego, A., Anderson, J. A., Witte, U.

    Journal of Soils and Sediments, vol. 19, no. 3, pp. 1576-1586

    Contributions to Journals: Articles

  • The effect of chemical dispersant concentration on hydrocarbon mobility through permeable North-East Scotland sands

    Perez Calderon, L. J., Potts, L. D., Cornulier, T., Gallego, A., Anderson, J. A., Witte, U.

    Estuarine, Coastal and Shelf Science, vol. 214, pp. 72-81

    Contributions to Journals: Articles

  • Advective pore-water transport of hydrocarbons in North East Scotland coastal sands

    Perez Calderon, L. J., Vossen, K., Potts, L. D., Gallego, A., Anderson, J. A., Witte, U.

    Environmental Science and Pollution Research , vol. 25, no. 28, pp. 28445-28459

    Contributions to Journals: Articles

  • Effect of spatial origin and hydrocarbon composition on bacterial consortia community structure and hydrocarbon biodegradation rates

    Potts, L. D., Calderon, L. J. P., Gontikaki, E., Keith, L., Gubry-Rangin, C., Anderson, J. A., Witte, U.

    FEMS Microbiology Ecology, vol. 94, no. 9, pp. fiy127-fiy127

    Contributions to Journals: Articles

  • Bacterial Community Response in Deep Faroe-Shetland Channel Sediments Following Hydrocarbon Entrainment With and Without Dispersant Addition

    Perez Calderon, L. J., Potts, L. D., Gontikaki, E., Gubry-Rangin, C., Cornulier, T., Gallego, A., Anderson, J. A., Witte, U. F.

    Frontiers in Marine Science: Deep-Sea Environments and Ecology, vol. 5, pp. 1-17

    Contributions to Journals: Articles

  • Current status of deepwater oil spill modelling in the Faroe-Shetland Channel, Northeast Atlantic, and future challenges

    Gallego, A., O'Hara Murray, R., Berx, B., Turrell, W. R., Beegle-Krause, C. J., Inall, M., Sherwin, T., Siddorn, J., Wakelin, S., Vlasenko, V., Hole, L. R., Dagestad, K. F., Rees, J., Short, L., Rønningen, P., Main, C. E., Legrand, S., Gutierrez, T., Witte, U., Mulanaphy, N.

    Marine Pollution Bulletin, vol. 127, pp. 484-504

    Contributions to Journals: Review articles

  • Short-term processing of ice algal- and phytoplankton-derived carbon by Arctic benthic communities revealed through isotope labelling experiments

    Mäkelä, A., Witte, U., Archambault, P.

    Marine Ecology Progress Series, vol. 600, pp. 21-39

    Contributions to Journals: Articles

  • The Variable Influence of Dispersant on Degradation of Oil Hydrocarbons in Subarctic Deep-Sea Sediments at Low Temperatures (0-5oC)

    Ferguson, R. M. W., Gontikaki, E., Anderson, J. A., Witte, U.

    Scientific Reports, vol. 7, no. 1, 2253

    Contributions to Journals: Articles

  • Benthic macroinfaunal community structure, resource utilisation and trophic relationships in two Canadian Arctic Archipelago polynyas

    Mäkelä, A., Witte, U., Archambault, P.

    PloS ONE, vol. 12, no. 8, e0183034

    Contributions to Journals: Articles

  • A System for Retrieval and Incubation of Benthic Sediment Cores at In Situ Ambient Pressure and Under Controlled or Manipulated Environmental Conditions

    Jackson, K., Witte, U., Chalmers, S., Anders, E., Parkes, J.

    Journal of atmospheric and oceanic technology, vol. 34, no. 5, pp. 983-1000

    Contributions to Journals: Articles

  • Coral cities of the deep: Species–habitat associations on the Mingulay Reef Complex

    Henry, L., Orejas, C., Kazanidis, G., Durán Suja, L., Witte, U., Roberts, J. M.

    Ocean Challenge, vol. 21, no. 2, pp. 17-19

    Contributions to Journals: Articles

  • Environmental Impacts of the Deep-Water Oil and Gas Industry: A Review to Guide Management Strategies

    Cordes, E. E., Jones, D. O. B., Schlacher, T. A., Amon, D. J., Bernardino, A. F., Brooke, S., Carney, R., DeLeo, D. M., Dunlop, K. M., Escobar-Briones, E. G., Gates, A. R., Génio, L., Gobin, J., Henry, L., Herrera, S., Hoyt, S., Joye, M., Kark, S., Mestre, N. C., Metaxas, A., Pfeifer, S., Sink, K., Sweetman, A. K., Witte, U.

    Frontiers in Environmental Science, vol. 4, pp. 1-26

    Contributions to Journals: Articles

  • The effect of flow speed and food size on the capture efficiency and feeding behaviour of the cold-water coral Lophelia pertusa

    Orejas, C., Gori, A., Rad-Menéndez, C., Last, K. S., Davies, A. J., Beveridge, C. M., Sadd, D., Kiriakoulakis, K., Witte, U., Roberts, J. M.

    Journal of Experimental Marine Biology and Ecology, vol. 481, pp. 34-40

    Contributions to Journals: Articles

  • The trophic structure of Spongosorites coralliophaga-coral rubble communities at two northeast Atlantic cold water coral reefs

    Kazanidis, G., Witte, U. F. M.

    Marine Biology Research, vol. 12, no. 9, pp. 932-947

    Contributions to Journals: Articles

  • How Can We Identify and Communicate the Ecological Value of Deep-Sea Ecosystem Services?

    Jobstvogt, N., Townsend, M., Witte, U., Hanley, N.

    PloS ONE, vol. 9, no. 7, pp. 1-11

    Contributions to Journals: Articles

  • Uptake of phytodetritus by benthic foraminifera under oxygen depletion at the Indian margin (Arabian Sea)

    Enge, A. J., Witte, U., Kucera, M., Heinz, P.

    Biogeosciences, vol. 11, no. 7, pp. 2017-2026

    Contributions to Journals: Articles

  • Twenty thousand sterling under the sea: Estimating the value of protecting deep-sea biodiversity

    Jobstvogt, N., Hanley, N., Hynes, S., Kenter, J., Witte, U.

    Ecological Economics, vol. 97, pp. 10-19

    Contributions to Journals: Articles

  • Temporal and depth-related differences in prokaryotic communities in abyssal sediments associated with particulate organic carbon flux

    Moeseneder, M. M., Smith, K. L., Ruhl, H. A., Jones, D. O. B., Witte, U., Prosser, J. I.

    Deep Sea Research Part I: Oceanographic Research Papers, vol. 70, pp. 26-35

    Contributions to Journals: Articles

  • Macrofauna regulate heterotrophic bacterial carbon and nitrogen incorporation in low-oxygen sediments

    Hunter, W. R., Veuger, B., Witte, U.

    The ISME Journal, vol. 6, no. 11, pp. 2140-2151

    Contributions to Journals: Articles

  • Resource quality affects carbon cycling in deep-sea sediments

    Mayor, D. J., Thornton, B., Hay, S., Zuur, A. F., Nicol, G. W., McWilliam, J. M., Witte, U. F. M.

    The ISME Journal, vol. 6, no. 9, pp. 1740-1748

    Contributions to Journals: Articles

  • Permeability of intertidal sandflats: Impact of temporal variability on sediment metabolism

    Zetsche, E., Bulling, M. T., Witte, U.

    Continental Shelf Research, vol. 42, pp. 41-50

    Contributions to Journals: Articles

  • High resolution mapping of sediment organic matter from acoustic reflectance data

    Serpetti, N., Heath, M., Rose, M., Witte, U.

    Hydrobiologia, vol. 680, no. 1, pp. 265-284

    Contributions to Journals: Articles

  • Microbial response to organic matter enrichment in the Oligotrophic Levantine Basin (Eastern Mediterranean)

    Gontikaki, E., Polymenakou, P. N., Thornton, B., Narayanaswamy, B. E., Black, K., Tselepides, A., Witte, U.

    Geomicrobiology Journal, vol. 29, no. 7, pp. 648-655

    Contributions to Journals: Articles

  • Temporal variation in the sediment permeability of an intertidal sandflat

    Zetsche, E., Paterson, D. M., Lumsdon, D. G., Witte, U.

    Marine Ecology Progress Series, vol. 441, pp. 49-63

    Contributions to Journals: Articles

  • Food web flows through a sub-arctic deep-sea benthic community

    Gontikaki, E., van Oevelen, D., Soetaert, K., Witte, U.

    Progress in Oceanography, vol. 91, no. 3, pp. 245-259

    Contributions to Journals: Articles

  • Absorption efficiencies and basal turnover of C, N and fatty acids in a marine Calanoid copepod

    Mayor, D. J., Cook, K., Thornton, B., Walsham, P., Witte, U. F. M., Zuur, A. F., Anderson, T. R.

    Functional Ecology, vol. 25, no. 3, pp. 509-518

    Contributions to Journals: Articles

  • Epi-benthic megafaunal zonation across an oxygen minimum zone at the Indian continental margin

    Hunter, W. R., Oguri, K., Kitazato, H., Ansari, Z. A., Witte, U.

    Deep Sea Research Part I: Oceanographic Research Papers, vol. 58, no. 6, pp. 699-710

    Contributions to Journals: Articles

  • Utilisation of different carbon sources in a shallow estuary identified through stable isotope techniques

    Zetsche, E., Thornton, B., Midwood, A. J., Witte, U.

    Continental Shelf Research, vol. 31, no. 7-8, pp. 832-840

    Contributions to Journals: Articles

  • Blending single beam RoxAnn and multi-beam swathe QTC hydro-acoustic discrimination techniques for the Stonehaven area, Scotland, UK

    Serpetti, N., Heath, M., Armstrong, E., Witte, U.

    Journal of Sea Research, vol. 65, no. 4, pp. 442-455

    Contributions to Journals: Articles

  • Feeding strategies of deep-sea sub-Arctic macrofauna of the Faroe-Shetland Channel: Combining natural stable isotopes and enrichment techniques

    Gontikaki, E., Mayor, D. J., Narayanaswamy, B. E., Witte, U. F. M.

    Deep Sea Research Part I: Oceanographic Research Papers, vol. 58, no. 2, pp. 160-172

    Contributions to Journals: Articles

  • Processing of 13C-labelled diatoms by a bathyal community at sub-zero temperatures

    Gontikaki, E., Mayor, D. J., Thornton, B., Black, K., Witte, U.

    Marine Ecology Progress Series, vol. 421, pp. 39-50

    Contributions to Journals: Articles

  • Response of the benthic foraminiferal community to a simulated short-term phytodetritus pulse in the abyssal North Pacific

    Enge, A. J., Nomaki, H., Ogawa, N. O., Witte, U., Moeseneder, M. M., Lavik, G., Ohkouchi, N., Kitazato, H., Kucera, M., Heinz, P.

    Marine Ecology Progress Series, vol. 438, pp. 129-142

    Contributions to Journals: Articles

  • Europe's Grand Canyon Nazare Submarine Canyon

    Tyler, P., Amaro, T., Arzola, R., Cunha, M. R., de Stigter, H., Gooday, M. A., Huvenne, V., Ingels, J., Kiriakoulakis, K., Lastras, G., Masson, D., Oliveira, A., Pattenden, A., Vanreusel, A., Van Weering, T., Vitorino, J., Witte, U. F. M., Wolff, G.

    Fisheries Oceanography, vol. 22, no. 1, pp. 46-57

    Contributions to Journals: Articles

  • Europe's grand canyon: Nazaré submarine vitório valley canyon

    Tyler, P., Amaro, T., Arzola, R., Cunha, M. R., de Stigter, H., Gooday, A., Huvenne, V., Ingels, J., Kiriakoulakis, K., Lastras, G., Masson, D., Oliveira, A., Pattenden, A., Vanreusel, A., van Weering, T., Vitorino, J., Witte, U., Wolff, G.

    Oceanography, vol. 22, no. 1, pp. 46-57

    Contributions to Journals: Articles

  • Retarded response by macrofauna-size foraminifera to phytodetritus in a deep Norwegian Fjord

    Sweetman, A. K., Sommer, S., Pfannkuche, O., Witte, U. F. M.

    Journal of Foraminiferal Research, vol. 39, no. 1, pp. 15-22

    Contributions to Journals: Articles

  • Macrofaunal response to phytodetritus in a bathyal Norwegian fjord

    Sweetman, A. K., Witte, U.

    Deep Sea Research Part I: Oceanographic Research Papers, vol. 55, no. 11, pp. 1503-1514

    Contributions to Journals: Articles

  • Response of an abyssal macrofaunal community to a phytodetrital pulse

    Sweetman, A. K., Witte, U.

    Marine Ecology Progress Series, vol. 355, pp. 73-84

    Contributions to Journals: Articles

  • Instantaneous benthic response to different organic matter quality: in situ experiments in the Benguela Upwelling System

    Aspetsberger, F., Zabel, M., Ferdelman, T., Struck, U., Mackensen, A., Ahke, A., Witte, U.

    Marine Biology Research, vol. 3, no. 5, pp. 342-356

    Contributions to Journals: Articles

  • In situ fluxes and zonation of microbial activity in surface sediments of the Håkon Mosby Mud Volcano

    de Beer, D., Sauter, E., Niemann, H., Kaul, N., Foucher, J. -. P., Witte, U. F. M., Schlueter, M., Boetius, A.

    Limnology and Oceanography, vol. 51, no. 3, pp. 1315-1331

    Contributions to Journals: Articles

  • Enhanced benthic activity in sandy sublittoral sediments: Evidence from C-13 tracer experiments

    Buhring, S. I., Ehrenhauss, S., Kamp, A., Moodley, L., Witte, U.

    Marine Biology Research, vol. 2, no. 2, pp. 120-129

    Contributions to Journals: Articles

  • Benthic microbial and whole-community responses to different amounts of 13C-enriched algae: In situ experiments in the deep Cretan Sea (Eastern Mediterranean)

    Buhring, S. I., Lampadariou, N., Moodley, L., Tselepides, A., Witte, U. F. M.

    Limnology and Oceanography, vol. 51, no. 1, pp. 157-165

    Contributions to Journals: Articles

  • Coastal Ocean Benthic Observatories (COBO): Integrated tools for the in situ observation and study of benthic ecosystem biogeochemical processes

    Apitz, S., Bell, E., Damgaard, L., Gilbert, F., Glud, R., Hall, P., Kershaw, P., Nickel, L., Parker, R., Rabouille, C., Shimmield, G., Solan, M., Soltwedel, T., Spagnoli, F., Witte, U.

    230th National Meeting of the American-Chemical-Society, pp. U1791-U1792

    Contributions to Journals: Abstracts

  • Pore-water advection and solute fluxes in permeable marine sediments (I): Calibration and performance of the novel benthic chamber system Sandy

    Janssen, F., Faerber, P., Huettel, M., Meyer, M., Witte, U.

    Limnology and Oceanography, vol. 50, no. 3, pp. 768-778

    Contributions to Journals: Articles

  • Pore-water advection and solute fluxes in permeable marine sediments (II): Benthic respiration at three sandy sites with different permeabilities (German Bight, North Sea)

    Janssen, F., Huettel, M., Witte, U. F. M.

    Limnology and Oceanography, vol. 50, no. 3, pp. 779-792

    Contributions to Journals: Articles

  • Intercalibration of benthic flux chambers II. Hydrodynamic characterization and flux comparisons of 14 different designs

    Tengberg, A., Hall, P., Andersson, U., Linden, B., Styrenius, O., Boland, G., de Bovee, F., Carlsson, B., Ceradini, S., Devol, A., Duineveld, G., Friemann, J., Glud, R., Khripounoff, A., Leather, J., Linke, P., Lund-Hansen, L., Rowe, G., Santschi, P., de Wilde, P., Witte, U.

    Marine chemistry, vol. 94, no. 1-4, pp. 147-173

    Contributions to Journals: Articles

  • The microbial community structure of different permeable sandy sediments characterized by the investigation of bacterial fatty acids and fluorescence in situ hybridization

    Buhring, S., Elvert, M., Witte, U.

    Environmental Microbiology, vol. 7, no. 2, pp. 281-293

    Contributions to Journals: Articles

  • Processing of C-13-labelled phytoplankton in a fine-grained sandy-shelf sediment (North Sea): relative importance of different macrofauna species

    Kamp, A., Witte, U.

    Marine Ecology Progress Series, vol. 297, pp. 61-70

    Contributions to Journals: Articles

  • Reactivity of organic matter in Benguela & Arctic sediments: The role of supply vs. quality

    Ahke, A., Ferdelman, T., Aspetsberger, F., Nickel, M., Witte, U., Zabel, M.

    14th Annual V M Goldschmidt Conference, pp. A349-A349

    Contributions to Journals: Abstracts

  • Decomposition of diatoms and nutrient dynamics in permeable North Sea sediments

    Ehrenhauss, S., Witte, U., Janssen, F., Huettel, M.

    Continental Shelf Research, vol. 24, no. 6, pp. 721-737

    Contributions to Journals: Articles

  • Effect of advective pore water transport on distribution and degradation of diatoms in permeable North Sea sediments

    Ehrenhauss, S., Witte, U., Buhring, S., Huettel, M.

    Marine Ecology Progress Series, vol. 271, pp. 99-111

    Contributions to Journals: Articles

  • In situ experimental evidence of the fate of a phytodetritus pulse at the abyssal sea floor

    Witte, U. F. M., Wenzhoefer, F., Sommer, S., Boetius, A., Heinz, P., Aberle, N., Sand, M., Cremer, A., Abraham, W. R., Joergensen, B. B., Pfannkuche, O.

    Nature, vol. 424, pp. 763-766

    Contributions to Journals: Articles

  • Benthic biogeochemistry: state of the art technologies and guidelines for the future of in situ survey

    Viollier, E., Rabouille, C., Apitz, S., Breuer, E., Chaillou, G., Dedieu, K., Furukawa, Y., Grenz, C., Hall, P., Janssen, F., Morford, J., Poggiale, J., Roberts, S., Shimmield, T., Taillefert, M., Tengberg, A., Wenzhofer, F., Witte, U.

    Journal of Experimental Marine Biology and Ecology, vol. 285, pp. 5-31

    Contributions to Journals: Articles

  • Deep-sea macrofauna exposed to a simulated sedimentation event in the abyssal NE Atlantic: in situ pulse-chase experiments using C-13-labelled phytodetritus

    Aberle, N., Witte, U.

    Marine Ecology Progress Series, vol. 251, pp. 37-47

    Contributions to Journals: Articles

  • Rapid response of a deep-sea benthic community to POM enrichment: an in situ experimental study

    Witte, U., Aberle, N., Sand, M., Wenzhofer, F.

    Marine Ecology Progress Series, vol. 251, pp. 27-36

    Contributions to Journals: Articles

  • Metabolism and decompression tolerance of scavenging lysianassoid deep-sea amphipods

    Treude, T., Janssen, F., Queisser, W., Witte, U.

    Deep Sea Research Part I: Oceanographic Research Papers, vol. 49, no. 7, pp. 1281-1289

    Contributions to Journals: Articles

  • Microbial degradation of organic matter in deep-sea sediments: Responses to POM pulses.

    Boetius, A., Witte, U., Sand, E., Pfannkuche, O.

    Abstracts of Papers of the American Chemical Society, vol. 221, pp. U542-U542

    Contributions to Journals: Abstracts

  • A marine microbial consortium apparently mediating anaerobic oxidation of methane

    Boetius, A., Ravenschlag, K., Schubert, C., Rickert, D., Widdel, F., Gieseke, A., Amann, R., Jorgensen, B., Witte, U., Pfannkuche, O.

    Nature, vol. 407, no. 6804, pp. 623-626

    Contributions to Journals: Articles

  • Bioturbation in the abyssal Arabian Sea: influence of fauna and food supply

    Turnewitsch, R., Witte, U., Graf, G.

    Deep Sea Research Part II: Topical Studies in Oceanography, vol. 47, no. 14, pp. 2877-2911

    Contributions to Journals: Articles

  • High rates of benthic carbon remineralisation in the abyssal Arabian Sea

    Witte, U., Pfannkuche, O.

    Deep Sea Research Part II: Topical Studies in Oceanography, vol. 47, no. 14, pp. 2785-2804

    Contributions to Journals: Articles

  • Scavenger assemblages under differing trophic conditions: a case study in the deep Arabian Sea

    Janssen, F., Treude, T., Witte, U.

    Deep Sea Research Part II: Topical Studies in Oceanography, vol. 47, no. 14, pp. 2999-3026

    Contributions to Journals: Articles

  • Vertical distribution of metazoan macrofauna within the sediment at four sites with contrasting food supply in the deep Arabian Sea

    Witte, U.

    Deep Sea Research Part II: Topical Studies in Oceanography, vol. 47, no. 14, pp. 2979-2997

    Contributions to Journals: Articles

  • Consumption of large carcasses by scavenger assemblages in the deep Arabian Sea: observations by baited camera

    Witte, U.

    Marine Ecology Progress Series, vol. 183, pp. 139-147

    Contributions to Journals: Articles

  • Autonomous deep-ocean lander vehicles; Modular approaches to design and operation

    Priede, I. G., Addison, S., Bradley, S., Bagley, P. M., Gray, P., Yau, C., Rolin, J. F., Blandin, J., Legrand, J., Khripounoff, A., Vangriesheim, A., Cremer, A., Witte, U., Pfannkuche, O., Tengberg, A.

    Contributions to Journals: Conference Articles

  • Autonomous deep-ocean lander vehicles: modular approaches to design and operation

    Priede, I. G., Addison, S., Bradley, S., Bagley, P. M., Gray, P., Yau, C., Rolin, J. F., Blandin, J., Legrand, J., Khripounoff, A., Vangriesheim, A., Cremer, A., Witte, U. F. M., Pfannkuche, O., Tengberg, A., Hulth, S., Hall, P., Helder, W., van Weering, T., Duineveld, G.

    Oceans '98. New York: IEEE Press pp. 1238-1244, 7 pages.

    Chapters in Books, Reports and Conference Proceedings: Conference Proceedings

  • Particle capture and deposition by deep sea sponges from the Norwegian-Greenland Sea

    Witte, U., Brattegard, T., Graf, G., Springer, B.

    Marine Ecology Progress Series, vol. 154, pp. 241-252

    Contributions to Journals: Articles

  • Metabolism of deep-sea sponges in the Greenland-Norwegian Sea

    Witte, U., Graf, G.

    Journal of Experimental Marine Biology and Ecology, vol. 198, no. 2, pp. 223-235

    Contributions to Journals: Articles

  • Seasonal reproduction in deep sea sponges - Triggered by vertical particle flux?

    Witte, U.

    Marine Biology, vol. 124, no. 4, pp. 571-581

    Contributions to Journals: Articles

  • AN IN-SITU EXPERIMENT TO INVESTIGATE THE DEPLETION OF SESTON ABOVE AN INTERFACE FEEDER FIELD ON THE CONTINENTAL-SLOPE OF THE WESTERN BARENTS SEA

    THOMSEN, L., GRAF, G., VONJUTERZENKA, K., WITTE, U.

    Marine Ecology Progress Series, vol. 123, no. 1-3, pp. 295-300

    Contributions to Journals: Articles

  • BENTHIC-PELAGIC COUPLING IN THE GREENLAND NORWEGIAN SEA AND ITS EFFECT ON THE GEOLOGICAL RECORD

    GRAF, G., GERLACH, S., RITZRAU, W., SCHELTZ, A., LINKE, P., THOMSEN, L., QUEISSER, W., WITTE, U.

    International Journal of Earth Sciences, vol. 84, no. 1, pp. 49-58

    Contributions to Journals: Articles

  • THE REPRODUCTIVE-CYCLE OF THE SPONGE HALICHONDRIA-PANICEA PALLAS (1766) AND ITS RELATIONSHIP TO TEMPERATURE AND SALINITY

    WITTE, U., BARTHEL, D., TENDAL, O.

    Journal of Experimental Marine Biology and Ecology, vol. 183, no. 1, pp. 41-52

    Contributions to Journals: Articles

  • REPRODUCTIVE-CYCLE AND OOGENESIS OF HALICHONDRIA-PANICEA (PALLAS) IN KIEL BIGHT

    WITTE, U., BARTHEL, D.

    SPONGES IN TIME AND SPACE. VanSoest, R., VanKempen, T., Breakman, J. (eds.). A A BALKEMA PUBLISHERS pp. 297-305, 9 pages.

    Chapters in Books, Reports and Conference Proceedings: Conference Proceedings

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