Kjell Gundersen

Forskningssjef
Telefon: 40428173
Avdeling: Plankton

Arbeidsområde

Research Interests - One of the key processes in environmental biogeochemistry is micro-plankton growth physiology, nutrient acquisition and microbial regeneration of elements. Phytoplankton primary producers are constrained by physical and chemical boundaries within their environment. Tributaries, estuaries, continental margins, and even open oceans, represent a unique transition between atmosphere, land and ocean with strong physical and biogeochemical couplings. My primary research interest is the interaction between auto- and heterotrophic micro-plankton and the physical and chemical parameters constraining their growth physiology and hence, their significance in open ocean and coastal water biogeochemistry.

Key words - Primary productivity; Microbial respiration; Biogeochemistry, C, N, P-cycling; New & regenerated production


Aquatic primary productivity and respiration - Microbial growth physiology and biogeochemical cycling has always been constrained by our access to new technology. Newfound technological discoveries used to the fullest extent can be very powerful and this is one of the reasons why I find our field of research so exciting. Diel netPP and RESP can now be measured in-situ using a novel DO sensor (that does not consume oxygen) positioned inside an incubator flask. The incubator unit can be light-dark manipulated (5 minutes is enough to get a significant read on net daytime respiration) using a timer controlled unit. Since my arrival at Institute of Marine Research (IMR) in Bergen, the incubator is in the process of being redesigned for onboard in-vitro incubations that generate phytoplankton photosynthesis-irradiance (PI) curves. Since RESP is measured at each light-level (and is not a linear function of netPP)  total PP can also be calculated from this incubation.

Automated sensor platforms used in time-series monitoring - Automated sensors on moored applications were first pioneered in physical oceanography (temperature, salinity, current meters and lately the ADCP), but we are now entering a new chapter in ocean science where more sophisticated chemical and biological sensors are starting to become commercially available. In order to ground-truth the new methods and provide a link to the past, these sensors must be combined with conventional biogeochemical sampling methods. A number of new and exciting sensor platforms, such as Gliders and ARGO buoys, are now routinely used by IMR in the Norwegian Sea and into the Arctic Ocean. In addition to salinity and temperature, automated Glider and ARGO sensor platforms are now also equipped with turbidity and in-situ fluorescence sensors that can cover large regions of the ocean interior.

Curriculum Vitae

Kjell Gundersen

Institute of Marine Research
P.O. Box 1870 Nordnes
NO-5817 Bergen, Norway

Phone:  (+47) 4042 8173
Fax:  (+47) 5523 8531
e-mail:  Kjell.Gundersen@imr.no

 

Education

Doctor of Philosophy (April 1999) Biological Oceanography; Factors Controlling Bacterial Abundance, Biomass and Growth at the Bermuda Atlantic Time-series Study Site, Department of Oceanography, University of Southampton, England, UK

Master of Science (February 1989) Marine Biology; Degradation and the Effect of Using Chloroform in Sediment Traps, Institute for Marine Biology, University of Bergen, Norway

 

Professional Experience

(2013-present)  Researcher, Plankton Research Group, Institute of Marine Research, Bergen, Norway
(2006-2013)  Assistant Research Professor, DMS, University of Southern Mississippi, MS, USA
(2004-2006)  Research Associate, Darling Marine Center, University of Maine, Orono, ME, USA
(2003-2007)  Adjunct Research Faculty, Bigelow Laboratory for Ocean Sciences, West Boothbay Harbor, ME, USA
(2002-2003)  Postdoctoral Researcher, Bigelow Laboratory for Ocean Sciences, West Boothbay Harbor, ME, USA
(1998-2001)  Postdoctoral Research Fellow, Stockholm University, Sweden
(1989-1997)  Research Assistant, Bermuda Atlantic Time-series Study (BATS) at Bermuda Biological Station for Research (BBSR), Bermuda

 

 

International Refereed Publications

Orcutt, K. M., K. Gundersen, J.W. Ammerman (2013) Intense ectoenzyme activities associated with Trichodesmium colonies in the Sargasso Sea. Marine Ecology Progress Series, 478:101-113

Luo, Y.-W., Doney, S. C., Anderson, L. A., Benavides, M., Berman-Frank, I., Bode, A., Bonnet, S., Boström, K. H., Böttjer, D., Capone, D. G., Carpenter, E. J., Chen, Y. L., Church, M. J., Dore, J. E., Falcón, L. I., Fernández, A., Foster, R. A., Furuya, K., Gómez, F., Gundersen, K., Hynes, A. M., Karl, D. M., Kitajima, S., Langlois, R. J., LaRoche, J., Letelier, R. M., Marañón, E., McGillicuddy Jr, D. J., Moisander, P. H., Moore, C. M., Mouriño-Carballido, B., Mulholland, M. R., Needoba, J. A., Orcutt, K. M., Poulton, A. J., Rahav, E., Raimbault, P., Rees, A. P., Riemann, L., Shiozaki, T., Subramaniam, A., Tyrrell, T., Turk-Kubo, K. A., Varela, M., Villareal, T. A., Webb, E. A., White, A. E., Wu, J., and Zehr, J. P. ( 2012) Database of diazotrophs in global ocean: abundance, biomass and nitrogen fixation rates. Earth System Science Data, 4, 47-73, DOI:10.5194/essd-4-47-2012

Cai, W.-J., X. Hu, W.-J. Huang, M.C. Murrell, J.C. Lehrter, S.E. Lohrenz, W.-C. Chou, W. Zhai, J.T. Hollibaugh, Y. Wang, P. Zhao, X. Guo, K. Gundersen, M. Dai & G.-C. Gong (2011) Eutrophication and high atmospheric pCO2 enhance ocean acidification and denitrification. Nature Geoscience, DOI:10.1038/NGEO1297

Boss, E., L. Taylor, S. Gilbert, K. Gundersen, N. Hawley, C. Janzen, T. Johengen, H. Purcell, C. Robertson, D. Schar, G.J. Smith & M. Tamburri (2009) Comparison of inherent optical properties as a surrogate for particulate matter concentration in coastal waters. Limnology & Oceanography: Methods 7:803-810

Orcuttt, K.M., S. Ren & K. Gundersen (2009) Detecting proteins in highly autofluorescent cells using quantum dot antibody conjugates. Sensors 9:7540-7549

Orcutt, K.M., K. Gundersen, M.L. Wells, N.J. Poulton, M.E. Sieracki & G.J. Smith (2008) Lighting up phytoplankton cells with quantum dots. Limnology & Oceanography: Methods 6:653-658

Degerholm, J., K. Gundersen, S. Hajdu,  B. Bergman & E. Söderbäck (2008) Seasonal significance of N2 fixation in coastal and off-shore waters of the north-western Baltic Sea. Marine Ecology Progress Series 360:73-84

Orcutt, K.M., K. Gundersen & U. Rasmussen (2007) Another look at green Trichodesmium colonies. Limnology & Oceanography 53:2049-2051

Ohlendieck, U., K. Gundersen, M. Meyerhöfer, P. Fritsche, K. Nachtigall & B. Bergman (2007) The significance of nitrogen fixation to new production during early summer in the Baltic sea. Biogeosciences 4:1-11

Degerholm, J., K. Gundersen, B. Bergman & E. Söderbäck (2006) Phosphorus limiting growth in the filamentous cyanobacteria Nodularia sp. and Aphanizomenon sp. FEMS Microbiology Ecology 58:323-332

Gundersen, K., M. Heldal, S. Norland & D.A. Purdie (2002) Elemental C, N and P content of individual bacteria collected at the Bermuda Atlantic Time-series Study (BATS) site. Limnology & Oceanography 47:1525-1530

Gallon, J.R., P. Albertano, B. Bergman, K.v. Bröckel, A. Canini, R. Congresti, A.M. Evans, P. Fritsche, K. Gundersen, S.te L. Hekkert, A. Jones, M. Meyerhöfer, K. Nachtigall, U. Ohlendieck, K.M. Orcutt, S. Repka, K. Sivonen, M. Staal & L.J. Stal (2002) Uncoupling of N2 fixation and primary production in a developing cyanobacterial bloom in the Baltic Sea. Limnology & Oceanography 47:1514-1521

Orcutt, K., U. Rasmussen, E.A. Webb, J.B. Waterbury, K. Gundersen & B. Bergman (2002) Characterization of Trichodesmium spp. using genetic techniques including HIP1 DNA fingerprinting. Applied Environmental Microbiology 68:2236-2245

Gundersen, K., K.M. Orcutt, D.A. Purdie, A.F. Michaels & A.H. Knap (2001) Particulate organic carbon mass distribution at the Bermuda Atlantic Time-series Study (BATS) site. Deep-Sea Research II 48:1697-1718

Orcutt, K.M., F. Lipschultz, K. Gundersen, R. Arimoto, A.F. Michaels, A.H. Knap & J.R. Gallon (2001) A seasonal study of the significance of N2 fixation by Trichodesmium spp. at the Bermuda Atlantic Time-series Study (BATS) site. Deep-Sea Research II 48:1583-1608

Heiskanen, A.-S., Haapala, J. & K. Gundersen (1998) Sedimentation and pelagic retention of particulate C, N and P in the coastal northern Baltic Sea. Estuarine, Coastal and Shelf Science 46:703-712

Gundersen, K., G. Bratbak & M. Heldal (1996) Factors influencing the loss of bacteria in preserved seawater samples. Marine Ecology Progress Series 137:305-310

Heiskanen, A.-S., T. Tamminen & K. Gundersen (1996) Impact of planktonic food web structure on nutrient retention and loss from late summer pelagic system in the northern Baltic Sea. Marine Ecology Progress Series 145:195-208

Hansell, D., N.R. Bates & K. Gundersen (1995) Mineralization of dissolved organic carbon in the Sargasso Sea. Marine Chemistry 51:201-212

Michaels, A.F., A.H. Knap, R.L. Dow, K. Gundersen, R.J. Johnson, J. Sorensen, A. Close, G.A. Knauer, S.E. Lohrenz, V.A. Asper, M. Tuel & R. Bidigare (1994) Seasonal patterns of ocean biogeochemistry at the U.S. JGOFS Bermuda Atlantic Time-series Study site. Deep-Sea Research 41:1013-1038

Lignell, R., A.-S. Heiskanen, H. Kuosa, K. Gundersen, P. Kuuppo-Leinikki, R. Pajuniemi & A. Uitto (1993) Fate of phytoplankton spring bloom: sedimentation and carbon flow in the planktonic food web in the northern Baltic. Marine Ecology Progress Series 94:239-252

Gundersen, K. & P. Wassmann (1990) Use of chloroform in sediment traps: caution advised. Marine Ecology Progress Series 64:187-195

 

International Meeting Contributions (last 5 years)

Howden, S., J. Griffin, R. Wanninkhof, G. Friederich, K. Gundersen & K. Martin (2014) A pilot project for autonomous ocean acidification surveys in the northern Gulf with the Liquid Robotics Wave Glider. ASLO Ocean Sciences, Honolulu, HI, USA [POSTER]

Gundersen, K., S. Howden, D. redalje & S. Lohrenz (2012) River discharge, stratification and shelf water hypoxia in the Mississippi Bight, Ocean Science Meeting, Salt Lake City, UT, USA [POSTER]

Orcutt, K.M., P. Burnett and K. Gundersen (2012) Molecular detection of unicellular diazotrophs in the Northern Gulf of Mexico. ASLO Ocean Sciences, Salt Lake City, UT, USA

Vandermeulen, R.A. & K. Gundersen (2012) Community growth physiology and nutrient chemistry in an estuarine coastal environment in the Northern Gulf of Mexico, Ocean Science Meeting, Salt Lake City, UT, USA [POSTER]

Burnett, P., K. Orcutt, K. Gundersen, A. Mojzis & D. Redalje (2011) The nitrogen budget in coastal waters of the Northern Gulf of Mexico is influenced by seasonal hypoxic events, 21st Biennial Conference of the Coastal and estuarine research Federation (CERF), Daytona Beach, FL, USA [POSTER]

Vandermeulen, R.A. & K. Gundersen (2011) Balancing photosynthesis and community respiration in an estuarine coastal environment in the Northern Gulf of Mexico, 21st Biennial Conference of the Coastal and estuarine research Federation (CERF), Daytona Beach, FL, USA [POSTER]

Cumbaa, N.O., K. Gundersen & A.C. Ortmann (2011) Archaeal community structure in two distinct seasonally hypoxic zones in the Northern Gulf of Mexico region. ASLO Aquatic Sciences meeting, San Juan, PR, USA

Ortell N., K. Gundersen & A.C. Ortmann (2011) Distribution and diversity of Archaea in two distinct seasonally hypoxic regions: Mobile Bay and coastal Mississippi. Mississippi-Alabama Bays and Bayous Symposium, Biloxi, MS, USA [POSTER]

Gundersen, K. & R. Vandermeulen (2010) Diurnal respiration in microplankton measured by automated optical dissolved oxygen (DO) sensor technology. Gordon Research Conference – Marine Microbes, Tilton, NH, USA [POSTER]

Ren, S., K.M. Orcutt, K. Gundersen (2010) Using Qdot conjugates to detect proteins in situ in highly autofluorescent cyanobacteria cells.  In: Marine Technology for Our Future: Global and Local Challenges, Oceans 09, MTS/IEEE-Biloxi, MS, USA

Orcutt, K.M., S. Ren & K. Gundersen (2010) Detecting proteins in highly autofluorescent cells using Quantum dot antibody conjugates. Gordon Research Conference – Marine Microbes, Tilton, NH, USA [POSTER]

Gundersen, K., S. Ren & K.M. Orcutt (2010) Quantum dot (Qdot) conjugates, a powerful new tool to detect proteins in highly autofluorescent cells. Ocean Sciences meeting, Portland, OR, USA [POSTER]

Gundersen, K., S.D. Howden & S. Lohrenz (2010) Hypoxia Monitoring on the Mississippi Gulf Coast. Workshop on Ecological Impacts of Hypoxia on Living Resources, NOAA National Coastal Data Development Center, Bay St. Louis, MS, USA

Gundersen, K. (2009) Centers for Ocean Sciences Education Excellence (COSEE) -Ocean Systems "Ocean-Climate Interactive". National Science Teachers Association (NSTA) Conference, New Orleans, LA, USA

Gundersen, K. (2009) Biology and the hypoxia. Hypoxia in the Mississippi Bight, Mississippi Department of Marine Resources, Biloxi, MS, USA

Howden, S.D., C. Brunner, S.E. Lohrenz, L. Guo, D.G. Redalje, A.M. Shiller, K.M. Martin, K. Gundersen, M.-J. Shim & A. Mojzis (2009) Monitoring and Assessment of Coastal and Marine Ecosystems in the Northern Gulf: USM-03. Northern Gulf Institute (NGI) Annual Conference, Mobile, AL, USA

 

Technicial Reports

Alliance for Coastal Technologies (2013) Performance Verification Statement for Automated Hydrocarbon Sensors. http://www.act-us.info/evaluation reports.php

Alliance for Coastal Technologies (2009) Performance Verification Statement for Automated Conductivity Sensors. http://www.act-us.info/evaluation reports.php

Alliance for Coastal Technologies (2007) Performance Verification Statement for Automated Turbidity Sensors. http://www.act-us.info/evaluation reports.php

Alliance for Coastal Technologies (2006) Performance Verification Statement for Automated Fluorometers. http://www.act-us.info/evaluation reports.php

Alliance for Coastal Technologies (2005) Performance Verification Statement for Dissolved Oxygen Sensors. http://www.act-us.info/evaluation reports.php

 

Method Manuals & Workshop Proceedings

UNESCO (1994) Protocols for the Joint Global Ocean Flux Study (JGOFS) Core measurements. Intergovernmental Oceanographic Commission (IOC) Scientific Committee on Oceanic research, Manual & Guides 29, UNESCO

Knap, A., A.F. Michaels, R.L. Dow, R. Johnson, K. Gundersen, J.C. Sorensen, A.R. Close, F.A. Howse, M. Hammer, N. Bates, A. Doyle & T. Waterhouse (1993) Bermuda Atlantic Time-series Study BATS Method Manual, Version 3. U.S. Joint Global Ocean Flux Study, U.S. JGOFS Planning and Coordination Office, Woods Hole, MA, USA

Gundersen, K. (1990) Sampling precision and preservation of sediment trap material. In: Sediment trap studies in the Nordic countries 2, Proceedings of the symposium “Sediment traps in marine ecological research and monitoring”, Wassmann, P., A.-S. Heiskanen & O. Lindahl (Eds.), NurmiPrint Oy, Finland

Gundersen, K. (1988) Degradation of organic matter in sediment traps. In: Sediment trap studies in the Nordic countries 1, Proceedings of the Workshop “Use of sediment traps for studies of vertical flux of particulate matter in the sea”, Wassmann, P. & A.-S. Heiskanen (Eds.), Yliopistopaino, Finland.

 

Advisement of students

Vandermeulen, R.A. (M.S. thesis, 2012) Factors influencing the spatial and temporal distribution of primary productivity and community respiration in the Mississippi coastal estuarine region , Department of Marine Science, The University of Southern Mississippi

Burnett, P.F. (M.S. thesis, 2012) Effects of hypoxia on nitrogen fixation and removal in the Mississippi Bight , Department of Marine Science, The University of Southern Mississippi

Ren, S. (M.S. thesis, 2010) Molecular detection of marine N2 fixation by cyanobacteria in the Northern Gulf of Mexico , Department of Marine Science, The University of Southern Mississippi

Degerholm, J. (Ph.D. thesis, 2002) Ecophysiological characteristics of the Baltic Sea N2-fixing cyanobacteria Aphanizomenon and Nodularia , Department of Botany, Stockholm University

Rundqvist, C. (Licenciat thesis, 1999) Department of Botany, Stockholm University

Gøtfors, L. (Licenciat thesis, 1999) Department of Botany, Stockholm University

Publikasjoner

Vitenskapelige artikler (NVI)

2017

Photophysiological and light absorption properties of phytoplankton communities in the river-dominated margin of the northern Gulf of Mexico

Sumit Chakraborty, Steven E. Lohrenz, Kjell Gundersen
Journal of Geophysical Research - Biogeosciences 122 p. 4922-4938
2015

Temporal variation and stoichiometric ratios of organic matter remineralization in bottom waters of the northern Gulf of Mexico during late spring and summer

Jianhong Xue, Wei-Jun Cai, Xinping Hu, Wei-Jen Huang, Steven E. Lohrenz, Kjell Gundersen
Journal of Geophysical Research - Biogeosciences 120 (Ja) p. 8304-8326
2013

Intense ectoenzyme activities associated with Trichodesmium colonies in the Sargasso Sea

Orcutt, K. M., K. Gundersen, J.W. Ammerman
Marine Ecology Progress Series 478 (Ja) p. 101-113
2012

Database of diazotrophs in global ocean: abundance, biomass and nitrogen fixation rates

Luo, Y.-W., Doney, S. C., Anderson, L. A., Benavides, M., Berman-Frank, I., Bode, A., Bonnet, S., Boström, K. H., Böttjer, D., Capone, D. G., Carpenter, E. J., Chen, Y. L., Church, M. J., Dore, J. E., Falcón, L. I., Fernández, A., Foster, R. A., Furuya, K., Gómez, F., Gundersen, K., Hynes, A. M., Karl, D. M., Kitajima, S., Langlois, R. J., LaRoche, J., Letelier, R. M., Marañón, E., McGillicuddy Jr, D. J., Moisander, P. H., Moore, C. M., Mouriño-Carballido, B., Mulholland, M. R., Needoba, J. A., Orcutt, K. M., Poulton, A. J., Rahav, E., Raimbault, P., Rees, A. P., Riemann, L., Shiozaki, T., Subramaniam, A., Tyrrell, T., Turk-Kubo, K. A., Varela, M., Villareal, T. A., Webb, E. A., White, A. E., Wu, J., and Zehr, J. P.
Earth System Science Data 4 (Ja) p. 47-73
2011

Eutrophication and high atmospheric pCO2 enhance ocean acidification and denitrification

Cai, W.-J., X. Hu, W.-J. Huang, M.C. Murrell, J.C. Lehrter, S.E. Lohrenz, W.-C. Chou, W. Zhai, J.T. Hollibaugh, Y. Wang, P. Zhao, X. Guo, K. Gundersen, M. Dai & G.-C. Gong
Nature Geoscience (Ja)
2009

Detecting proteins in highly autofluorescent cells using quantum dot antibody conjugates

Orcutt, K.M., S. Ren & K. Gundersen
Sensors 9 p. 7540-7549
2009

Comparison of inherent optical properties as a surrogate for particulate matter concentration in coastal waters

Boss, E., L. Taylor, S. Gilbert, K. Gundersen, N. Hawley, C. Janzen, T. Johengen, H. Purcell, C. Robertson, D. Schar, G.J. Smith & M. Tamburri
Limnology & Oceanography: Methods 7 (Ja) p. 803-810
2008

Seasonal significance of N2 fixation in coastal and off-shore waters of the north-western Baltic Sea

Degerholm, J., K. Gundersen, S. Hajdu, B. Bergman & E. Söderbäck
Marine Ecology Progress Series 360 p. 73-84
2008

Lighting up phytoplankton cells with quantum dots

Orcutt, K.M., K. Gundersen, M.L. Wells, N.J. Poulton, M.E. Sieracki & G.J. Smith
Limnology & Oceanography: Methods 6 p. 653-658
2007

Another look at green Trichodesmium colonies

Orcutt, K.M., K. Gundersen & U. Rasmussen
Limnology & Oceanography 53 p. 2049-2051
2006

Phosphorus limiting growth in the filamentous cyanobacteria Nodularia sp. and Aphanizomenon sp.

Degerholm, J., K. Gundersen, B. Bergman & E. Söderbäck
FEMS Microbiology Ecology 58 p. 323-332
2006

The significance of nitrogen fixation to new production during early summer in the Baltic Sea

Ohlendieck, U., K. Gundersen, M. Meyerhöfer, P. Fritsche, K. Nachtigall & B. Bergman
Biogeosciences 4 p. 1-11
2002

Characterization of Trichodesmium spp. using genetic techniques including HIP1 DNA fingerprinting

Orcutt, K., U. Rasmussen, E.A. Webb, J.B. Waterbury, K. Gundersen & B. Bergman
Applied Environmental Microbiology 68 p. 2236-2245
2002

Uncoupling of N2 fixation and primary production in a developing cyanobacterial bloom in the Baltic Sea

Gallon, J.R., P. Albertano, B. Bergman, K.v. Bröckel, A. Canini, R. Congresti, A.M. Evans, P. Fritsche, K. Gundersen, S.te L. Hekkert, A. Jones, M. Meyerhöfer, K. Nachtigall, U. Ohlendieck, K.M. Orcutt, S. Repka, K. Sivonen, M. Staal & L.J. Stal
Limnology & Oceanography 47 p. 1514-1521
2002

Elemental C, N and P content of individual bacteria collected at the Bermuda Atlantic Time-series Study (BATS) site

Gundersen, K., M. Heldal, S. Norland & D.A. Purdie
Limnology & Oceanography 47 p. 1525-1530
2001

A seasonal study of the significance of N2 fixation by Trichodesmium spp. at the Bermuda Atlantic Time-series Study (BATS) site

Orcutt, K.M., F. Lipschultz, K. Gundersen, R. Arimoto, A.F. Michaels, A.H. Knap & J.R. Gallon
Deep-Sea Research II 48 p. 1583-1608
2001

Particulate organic carbon mass distribution at the Bermuda Atlantic Time-series Study (BATS) site

Gundersen, K., K.M. Orcutt, D.A. Purdie, A.F. Michaels & A.H. Knap
Deep-Sea Research II 48 p. 1697-1718
1998

Sedimentation and pelagic retention of particulate C, N and P in the coastal northern Baltic Sea

Heiskanen, A.-S., Haapala, J. & K. Gundersen
Estuarine, Coastal and Shelf Science 46 p. 703-712
1996

Impact of planktonic food web structure on nutrient retention and loss from late summer pelagic system in the northern Baltic Sea

Heiskanen, A.-S., T. Tamminen & K. Gundersen
Marine Ecology Progress Series 145 p. 195-208
1996

Factors influencing the loss of bacteria in preserved seawater samples

Gundersen, K., G. Bratbak & M. Heldal
Marine Ecology Progress Series 137 p. 305-310
1995

Mineralization of dissolved organic carbon in the Sargasso Sea

Hansell, D., N.R. Bates & K. Gundersen
Marine Chemistry 51 p. 201-212
1994

Seasonal patterns of ocean biogeochemistry at the U.S. JGOFS Bermuda Atlantic Time-series Study site

Michaels, A.F., A.H. Knap, R.L. Dow, K. Gundersen, R.J. Johnson, J. Sorensen, A. Close, G.A. Knauer, S.E. Lohrenz, V.A. Asper, M. Tuel & R. Bidigare
Deep-Sea Research 41 p. 1013-1038
1993

Fate of phytoplankton spring bloom: sedimentation and carbon flow in the planktonic food web in the northern Baltic

Lignell, R., A.-S. Heiskanen, H. Kuosa, K. Gundersen, P. Kuuppo-Leinikki, R. Pajuniemi & A. Uitto
Marine Ecology Progress Series 94 p. 239-252
1990

Use of chloroform in sediment traps: caution advised

Gundersen, K. & P. Wassmann
Marine Ecology Progress Series 64 p. 187-195

Poster

2016

Dissolved inorganic nutrients determine phytoplankton primary production, cellular elemental composition and zooplankton growth in the Barents Sea

Gundersen, K., P. Dalpadado & H.R. Skjoldal
ICES 6th International Zooplankton Production Symposium, Bergen, Norway
2014

A pilot project for autonomous ocean acidification surveys in the northern Gulf with the Liquid Robotics Wave Glider

Howden, S., J. Griffin, R. Wanninkhof, G. Friederich, K. Gundersen & K. Martin
ASLO Ocean Sciences, Honolulu, HI, USA
2012

Community growth physiology and nutrient chemistry in an estuarine coastal environment in the Northern Gulf of Mexico

Vandermeulen, R.A. & K. Gundersen
Ocean Science Meeting, Salt Lake City, UT, USA
2012

River discharge, stratification and shelf water hypoxia in the Mississippi Bight

Gundersen, K., S. Howden, D. Redalje & S. Lohrenz
Ocean Science Meeting, Salt Lake City, UT, USA
2011

Distribution and diversity of Archaea in two distinct seasonally hypoxic regions: Mobile Bay and coastal Mississippi

Ortell N., K. Gundersen & A.C. Ortmann
Mississippi-Alabama Bays and Bayous Symposium, Biloxi, MS, USA
2011

Balancing photosynthesis and community respiration in an estuarine coastal environment in the Northern Gulf of Mexico

Vandermeulen, R.A. & K. Gundersen
21st Biennial Conference of the Coastal and estuarine research Federation (CERF), Daytona Beach, FL, USA
2011

The nitrogen budget in coastal waters of the Northern Gulf of Mexico is influenced by seasonal hypoxic events

Burnett, P., K. Orcutt, K. Gundersen, A. Mojzis & D. Redalje
21st Biennial Conference of the Coastal and estuarine research Federation (CERF), Daytona Beach, FL, USA
2010

Quantum dot (Qdot) conjugates, a powerful new tool to detect proteins in highly autofluorescent cells

Gundersen, K., S. Ren & K.M. Orcutt
Ocean Sciences Meeting, Portland, OR, USA
2010

Detecting proteins in highly autofluorescent cells using Quantum dot antibody conjugates

Orcutt, K.M., S. Ren & K. Gundersen
Gordon Research Conference – Marine Microbes, Tilton, NH, USA
2010

Carbon System Dynamics in the Large River-Dominated Northern Gulf of Mexico Coastal Margin: An Overview of the Gulf Carbon Program

Lohrenz, S.E., W.-J. Cai, K. Martin, S. Chakraborty, S. Epps, K. Gundersen, W. Huang & Y. Wang
AGU Fall Meeting, San Francisco, CA, USA
2010

Diurnal respiration in microplankton measured by automated optical dissolved oxygen (DO) sensor technology

Gundersen, K. & R. Vandermeulen
Gordon Research Conference – Marine Microbes, Tilton, NH, USA

Kapitler og bøker

2013

Nutrient and carbon dynamics in a large river-dominated coastal ecosystem: the Mississippi-Atchafalaya river system

Lohrenz, S.E. W.-J. Cai, S. Chakraborty, K. Gundersen & M.C. Murrell
In: Bianchi, T.S., M. Allison, W.-J. Cai (eds.) Biogeochemical dynamics at major river-coastal interfaces: linkages with global change. Cambridge University Press (Ja)

Populærvitenskapelige artikler

2016

Næringssalter, tilvekst av planteplankton og beitepress i norske havområder

Gundersen, K., L.F. Lunde, M. Petersen & J.S. Møgster
Fisken og havet – særnummer I – 2016 (Ja)
2015

Næringssalter og tilvekst av planteplankton i havområdene våre

Gundersen, K., J.S. Møgster, L.F. Lunde, M. Petersen, I.B. Tjelflaat & F. Rey
Fisken og havet – særnummer I – 2015

Faglige foredrag

2012

Molecular detection of unicellular diazotrophs in the Northern Gulf of Mexico

Orcutt, K.M., P. Burnett and K. Gundersen
ASLO Ocean Sciences, Salt Lake City, UT, USA
2011

Archaeal community structure in two distinct seasonally hypoxic zones in the Northern Gulf of Mexico region

Cumbaa, N.O., K. Gundersen & A.C. Ortmann
ASLO Aquatic Sciences meeting, San Juan, PR, USA
2010

Using Qdot conjugates to detect proteins in situ in highly autofluorescent cyanobacteria cells

Ren, S., K.M. Orcutt, K. Gundersen
In: Marine Technology for Our Future: Global and Local Challenges, Oceans 09, MTS/IEEE-Biloxi, MS, USA
2010

Hypoxia Monitoring on the Mississippi Gulf Coast.

Gundersen, K., S.D. Howden & S. Lohrenz
Workshop on Ecological Impacts of Hypoxia on Living Resources, NOAA National Coastal Data Development Center, Bay St. Louis, MS, USA

Rapporter og avhandlinger

2017

Næringssalter og tilvekst av planteplankton i norske havområder

Gundersen, K., Petersen, M., J.S. Møgster, J.S. & L.F. Lunde
Fisken og havet – særnummer I – 2017
2013

Performance Verification Statement for Automated Hydrocarbon Sensors

Alliance for Coastal Technologies
http://www.act-us.info/evaluation reports.php
2009

Performance Verification Statement for Automated Conductivity Sensors

Alliance for Coastal Technologies
http://www.act-us.info/evaluation reports.php
2007

Performance Verification Statement for Automated Turbidity Sensors

Alliance for Coastal Technologies
http://www.act-us.info/evaluation reports.php
2006

Performance Verification Statement for Automated Fluorometers

Alliance for Coastal Technologies
http://www.act-us.info/evaluation reports.php
2005

Performance Verification Statement for Dissolved Oxygen Sensors

Alliance for Coastal Technologies
http://www.act-us.info/evaluation reports.php
1994

Protocols for the Joint Global Ocean Flux Study (JGOFS) Core measurements

UNESCO
Intergovernmental Oceanographic Commission (IOC) Scientific Committee on Oceanic research, Manual & Guides 29
1993

Bermuda Atlantic Time-series Study BATS Method Manual, Version 3.

Knap, A., A.F. Michaels, R.L. Dow, R. Johnson, K. Gundersen, J.C. Sorensen, A.R. Close, F.A. Howse, M. Hammer, N. Bates, A. Doyle & T. Waterhouse
U.S. Joint Global Ocean Flux Study, U.S. JGOFS Planning and Coordination Office, Woods Hole, MA, USA.
1990

Sampling precision and preservation of sediment trap material

Gundersen, K.
In: Sediment trap studies in the Nordic countries 2, Proceedings of the symposium “Sediment traps in marine ecological research and monitoring”, Wassmann, P., A.-S. Heiskanen & O. Lindahl (Eds.), NurmiPrint Oy, Finland.
1988

Degradation of organic matter in sediment traps

Gundersen, K.
In: Sediment trap studies in the Nordic countries 1, Proceedings of the Workshop “Use of sediment traps for studies of vertical flux of particulate matter in the sea”, Wassmann, P. & A.-S. Heiskanen (Eds.), Yliopistopaino, Finland.
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