Kjell Gundersen
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)
2024
Primary Production and Respiration in the Norwegian Sea Estimated From Biogeochemical Argo Floats
JGR Oceans
129
p. e2023JC020568
2024
Primary Production and Respiration in the Norwegian Sea Estimated From Biogeochemical Argo Floats
Journal of Geophysical Research (JGR): Oceans
129
2023
Thirty years of nutrients and biogeochemistry in the Norwegian, Greenland and Iceland Seas, 1990-2019
Scientific Data
10
p. 256
2023
Nutrient Biogeochemistry in the Nordic Seas (Norwegian, Greenland, Iceland Seas), 2020 - 2022
NMDC
2023
Nutrient concentrations in minke whale faeces and the potential impact on dissolved nutrient pools off Svalbard, Norway
Progress in Oceanography
210
2023
Thirty Years of Nutrient Biogeochemistry in the Norwegian, Greenland and Iceland Seas, 1990 – 2019
Scientific Data (a Nature Research Journal)
10
p. 256
2022
Arctic and Atlantic Waters in the Norwegian Basin, Between Year Variability and Potential Ecosystem Implications
Frontiers in Marine Science
9
2022
Decadal trends in Ocean Acidification from the Ocean Weather Station M in the Norwegian Sea
Journal of Marine Systems
234
p. 1-13
2022
Nutrient Biogeochemistry in the Nordic Seas (Norwegian, Greenland and Iceland Seas), 1990 – 2019
NMDC access on-line
2022
Nutrient Biogeochemistry in the Barents Sea and the Arctic, 1990 – 2019
NMDC access on-line
2022
Thirty Years of Nutrient Biogeochemistry in the Barents Sea and the Arctic, 1990 – 2019
Scientific Data (a Nature Research Journal)
9
p. 649
2022
Nutrient concentrations in minke whale faeces and the potential impact on dissolved nutrient pools off Svalbard, Norway
Progress in Oceanography
2022
Arctic and Atlantic waters in the Norwegian Basin, between year variability and potential ecosystem implications
Frontiers Marine Science
9
p. 831739
2022
Carbon variability at Ocean Weather Station M in the Norwegian Sea with focus on ocean acidification
Journal of Marine Systems
234
p. 103775
2021
Copernicus Marine Service Ocean State Report, Issue 5
14
2021
Calculating Net Community Production and Respiration from Continuous Optode Measurements.
In: R.A. Vandermeulen, R.A., J. Chaves & A. Mannino (Eds) IOCCG Ocean Optics and Biogeochemistry Protocols for Satellite Ocean Colour Sensor Validation, IOCCG, Dartmouth, NS, Canada
Volume 7
p. TBD
2021
Declining silicate and nitrate concentrations in the northern North Atlantic.
In: Copernicus Marine Service Ocean State Report, Issue 5, Journal of Operational Oceanography
14
p. 23-31
2017
Photophysiological and light absorption properties of phytoplankton communities in the river-dominated margin of the northern Gulf of Mexico
Journal of Geophysical Research (JGR): 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
Journal of Geophysical Research (JGR): Biogeosciences
120
p. 8304-8326
2013
Intense ectoenzyme activities associated with Trichodesmium colonies in the Sargasso Sea
Marine Ecology Progress Series
478
p. 101-113
2012
Database of diazotrophs in global ocean: abundance, biomass and nitrogen fixation rates
Earth System Science Data
4
p. 47-73
2011
Eutrophication and high atmospheric pCO2 enhance ocean acidification and denitrification
Nature Geoscience
2009
Detecting proteins in highly autofluorescent cells using quantum dot antibody conjugates
Sensors
9
p. 7540-7549
2009
Comparison of inherent optical properties as a surrogate for particulate matter concentration in coastal waters
Limnology & Oceanography: Methods
7
p. 803-810
2008
Seasonal significance of N2 fixation in coastal and off-shore waters of the north-western Baltic Sea
Marine Ecology Progress Series
360
p. 73-84
2008
Lighting up phytoplankton cells with quantum dots
Limnology & Oceanography: Methods
6
p. 653-658
2007
Another look at green Trichodesmium colonies
Limnology & Oceanography
53
p. 2049-2051
2006
Phosphorus limiting growth in the filamentous cyanobacteria Nodularia sp. and Aphanizomenon sp.
FEMS Microbiology Ecology
58
p. 323-332
2006
The significance of nitrogen fixation to new production during early summer in the Baltic Sea
Biogeosciences
4
p. 1-11
2002
Characterization of Trichodesmium spp. using genetic techniques including HIP1 DNA fingerprinting
Applied Environmental Microbiology
68
p. 2236-2245
2002
Uncoupling of N2 fixation and primary production in a developing cyanobacterial bloom in the Baltic Sea
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
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
Deep-Sea Research II
48
p. 1583-1608
2001
Particulate organic carbon mass distribution at the Bermuda Atlantic Time-series Study (BATS) site
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
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
Marine Ecology Progress Series
145
p. 195-208
1996
Factors influencing the loss of bacteria in preserved seawater samples
Marine Ecology Progress Series
137
p. 305-310
1995
Mineralization of dissolved organic carbon in the Sargasso Sea
Marine Chemistry
51
p. 201-212
1994
Seasonal patterns of ocean biogeochemistry at the U.S. JGOFS Bermuda Atlantic Time-series Study site
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
Marine Ecology Progress Series
94
p. 239-252
1990
Use of chloroform in sediment traps: caution advised
Marine Ecology Progress Series
64
p. 187-195
Faglige foredrag
2023
Decadal trends from the Ocean Weather Station M
2023
Decadal trends from the Ocean Weather Station M
2015
Photosynthetic parameters and buio-optical properties of the phytoplankton community in the Northern Gulf of Mexico
2015 International Ocean Colour Science meeting, San Francisco, CA, USA
2012
Molecular detection of unicellular diazotrophs in the Northern Gulf of Mexico
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
ASLO Aquatic Sciences meeting, San Juan, PR, USA
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
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
Poster
2022
Trends in Ocean Acidification in the Norwegian Sea
2016
Dissolved inorganic nutrients determine phytoplankton primary production, cellular elemental composition and zooplankton growth in the Barents Sea
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
ASLO Ocean Sciences, Honolulu, HI, USA
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
2012
River discharge, stratification and shelf water hypoxia in the Mississippi Bight
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
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
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
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
Ocean Sciences Meeting, Portland, OR, USA
2010
Detecting proteins in highly autofluorescent cells using Quantum dot antibody conjugates
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
AGU Fall Meeting, San Francisco, CA, USA
2010
Diurnal respiration in microplankton measured by automated optical dissolved oxygen (DO) sensor technology
Gordon Research Conference – Marine Microbes, Tilton, NH, USA
Rapporter og avhandlinger
2024
North Sea Ecosystem - Report_2023002006
Toktrapport
2023
North Sea Ecosystem Cruise Report_JH2022206
2023
Status for miljøet i norske havområder - Rapport fra Overvåkingsgruppen 2023
2017
Næringssalter og tilvekst av planteplankton i norske havområder
Fisken og havet – særnummer I – 2017
2013
Performance Verification Statement for Automated Hydrocarbon Sensors
http://www.act-us.info/evaluation reports.php
2009
Performance Verification Statement for Automated Conductivity Sensors
http://www.act-us.info/evaluation reports.php
2007
Performance Verification Statement for Automated Turbidity Sensors
http://www.act-us.info/evaluation reports.php
2006
Performance Verification Statement for Automated Fluorometers
http://www.act-us.info/evaluation reports.php
2005
Performance Verification Statement for Dissolved Oxygen Sensors
http://www.act-us.info/evaluation reports.php
1994
Protocols for the Joint Global Ocean Flux Study (JGOFS) Core measurements
Intergovernmental Oceanographic Commission (IOC) Scientific Committee on Oceanic research, Manual & Guides
29
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.
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.
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.
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