Arjun Chennu

Dr. Arjun Chennu

Work Group Leader

Phone: +49 (0)421 23800 - 42

Fax: +49 (0)421 23800 - 30

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Office: Fahrenheitstr. 8
28359 Bremen
Room: 3203 (2nd floor)

Research interests

Habitat mapping and environmental description
Machine learning and modeling
Underwater and spectral imaging
Benthic photosynthesis and ecology
Development of in-situ instruments & methods
Software tools for science
Scientific diving




  • Possible link between Earth's rotation rate and oxygenation. Using numerical modeling and lab measurements, we demonstrated a mechanistic link between the length of day on Earth, which is influenced by the Moon, and the amount of oxygen exported by ground-dwelling bacteria. This daylength effect was likely a significant driver of oxygenation of the early Earth, and may help expain the much-debated pattern of oxygenation of Earth.
  • Hermann Neuhaus Prize from the Max Planck Society. In 2018, the Max Planck Foundation and the Hermann Neuhaus Foundation bestowed the first ever Hermann Neuhaus Prize in recognition of achievements towards marine habitat mapping with the invention of the HyperDiver and supporting a spin-off company.
  • Annette Barthelt Prize for best dissertation. In 2016, I received the Annette-Barthelt-Stiftung's prize for best doctoral dissertation in marine sciences.
  • Articles about HyperDiver
    • Article in Mongabay
    • Article in Ocean Bites about HyperDiver
    • Article in Innovations Report
    • Article in Nature news
    • Article in "Research Success Stories" by the European Commission
    • Article on TARA Oceans: French Polynesia expedition
    • Article in MIT German Technology Review
    • Article in


Google scholar: Arjun Chennu

  •  Meier, D.V.; Greve, A.J.; Chennu, A.; van Erk, M.R.; Muthukrishnan, T.; Abed, R.M.M.; Woebken, D.; de Beer, D. Limitation of Microbial Processes at Saturation-Level Salinities in a Microbial Mat Covering a Coastal Saltflat. Appl Environ Microbiol 2021, doi:10.1128/AEM.00698-21.

  • Klatt, J.M*.; Chennu, A*.; Arbic, B.K.; Biddanda, B.A.; Dick, G.J. Possible Link between Earth’s Rotation Rate and Oxygenation. Nat. Geosci. 2021, doi:10.1038/s41561-021-00784-3.

  • Cimoli, E.; Lucieer, V.; Meiners, K.M.; Chennu, A.; Castrisios, K.; Ryan, K.G.; Lund-Hansen, L.C.; Martin, A.; Kennedy, F.; Lucieer, A. Mapping the in Situ Microspatial Distribution of Ice Algal Biomass through Hyperspectral Imaging of Sea-Ice Cores. Scientific Reports 2020, 10, 21848, doi:10.1038/s41598-020-79084-6.
  • Khosravi, Y.; Kandukuri, R.D.P.; Palmer, S.R.; Gloag, E.S.; Borisov, S.M.; Starke, E.M.; Ward, M.T.; Kumar, P.; de Beer, D.; Chennu, A.; et al. Use of an Oxygen Planar Optode to Assess the Effect of High Velocity Microsprays on Oxygen Penetration in a Human Dental Biofilms In-Vitro. BMC Oral Health 2020, 20, 230, doi:10.1186/s12903-020-01217-0.
  • Gerbersdorf, S.U.; Koca, K.; deBeer, D.; Chennu, A.; Noss, C.; Risse-Buhl, U.; Weitere, M.; Eiff, O.; Wagner, M.; Aberle, J.; et al. Exploring Flow-Biofilm-Sediment Interactions: Assessment of Current Status and Future Challenges. Water Research 2020, 116182, doi:10.1016/j.watres.2020.116182.
  • Koopmans, D.; Holtappels, M.; Chennu, A.; Weber, M.; de Beer, D. High Net Primary Production of Mediterranean Seagrass (Posidonia Oceanica) Meadows Determined With Aquatic Eddy Covariance. Front. Mar. Sci. 2020, 7, doi:10.3389/fmars.2020.00118.
  • Rashid, A.R.; Chennu, A. A Trillion Coral Reef Colors: Deeply Annotated Underwater Hyperspectral Images for Automated Classification and Habitat Mapping. Data 2020, 5, 19, doi:10.3390/data5010019.
  • Chennu, A. MicroBenthos: A Modeling Framework for Microbial Benthic Ecology. JOSS 2018, 3, 674, doi:10.21105/joss.00674.
  • Koopmans, D.; Holtappels, M.; Chennu, A.; Weber, M.; de Beer, D. The Response of Seagrass (Posidonia Oceanica) Meadow Metabolism to CO2 Levels and Hydrodynamic Exchange Determined with Aquatic Eddy Covariance. Biogeosciences Discussions 2018, 1–23, doi:10.5194/bg-2018-199.
  • Chennu, A.; Färber, P.; De’ath, G.; Beer, D. de; Fabricius, K.E. A Diver-Operated Hyperspectral Imaging and Topographic Surveying System for Automated Mapping of Benthic Habitats. Scientific Reports 2017, 7, 7122, doi:10.1038/s41598-017-07337-y.
  • Fink, A.; den Haan, J.; Chennu, A.; Uthicke, S.; de Beer, D. Ocean Acidification Changes Abiotic Processes but Not Biotic Processes in Coral Reef Sediments. Front. Mar. Sci. 2017, 4, doi:10.3389/fmars.2017.00073.
  • De Beer, D.; Weber, M.; Chennu, A.; Hamilton, T.; Lott, C.; Macalady, J.; Klatt, J.M. Oxygenic and Anoxygenic Photosynthesis in a Microbial Mat from an Anoxic and Sulfidic Spring. Environmental Microbiology 2017, doi:10.1111/1462-2920.13654.
  • Chennu, A.; Grinham, A.; Polerecky, L.; De Beer, D.; Al-Najjar, M.A.A. Rapid Reactivation of Cyanobacterial Photosynthesis and Migration upon Rehydration of Desiccated Marine Microbial Mats. Frontiers in Microbiology 2015, 6, doi:10.3389/fmicb.2015.01472.
  • Chennu, A.; Volkenborn, N.; de Beer, D.; Wethey, D.S.; Woodin, S.A.; Polerecky, L. Effects of Bioadvection by Arenicola Marina on Microphytobenthos in Permeable Sediments. PLoS ONE 2015, 10, e0134236, doi:10.1371/journal.pone.0134236.
  • Chennu, A. Mapping the Microscale Variability of Microphytobenthos: Development of a Hyperspectral Imaging Method. Doctoral dissertation, Universität Bremen, 2014.
  • Chennu, A.; Färber, P.; Volkenborn, N.; Al-Najjar, M.A.A.; Janssen, F.; de Beer, D.; Polerecky, L. Hyperspectral Imaging of the Microscale Distribution and Dynamics of Microphytobenthos in Intertidal Sediments. Limnology and Oceanography: Methods 2013, 11, 511–528, doi:10.4319/lom.2013.11.511.
  • Chennu, A. Optical Coherence Tomography for Biomedical Applications: Use of Bessel Beams Explored. Master of Science dissertation, University of St. Andrews, 2008.
  • Plakhotnik, T.; Chennu, A.; Zvyagin, A.V. Statistics of Single-Electron Signals in Electron-Multiplying Charge-Coupled Devices. IEEE Transactions On Electron Devices 2006, 53, 618–622, doi:10.1109/ted.2006.870572.