All Publications


  • Photoacclimation of Arctic Ocean phytoplankton to shifting light and nutrient limitation LIMNOLOGY AND OCEANOGRAPHY Lewis, K. M., Arntsen, A. E., Coupel, P., Joy-Warren, H., Lowry, K. E., Matsuoka, A., Mills, M. M., van Dijken, G. L., Selz, Arrigo, K. R. 2019; 64 (1): 284–301

    View details for DOI 10.1002/lno.11039

    View details for Web of Science ID 000456720900020

  • Nitrogen Limitation of the Summer Phytoplankton and Heterotrophic Prokaryote Communities in the Chukchi Sea FRONTIERS IN MARINE SCIENCE Mills, M. M., Brown, Z. W., Laney, S. R., Ortega-Retuerta, E., Lowry, K. E., van Dijken, G. L., Arrigo, K. R. 2018; 5
  • Drivers of Ice Algal Bloom Variability Between 1980 and 2015 in the Chukchi Sea JOURNAL OF GEOPHYSICAL RESEARCH-OCEANS Selz, V., Saenz, B. T., van Dijken, G. L., Arrigo, K. R. 2018; 123 (10): 7037–52
  • Ice algal communities in the Chukchi and Beaufort Seas in spring and early summer: Composition, distribution, and coupling with phytoplankton assemblages LIMNOLOGY AND OCEANOGRAPHY Selz, V., Laney, S., Arnsten, A. E., Lewis, K. M., Lowry, K. E., Joy-Warren, H. L., Mills, M. M., van Dijken, G. L., Arrigo, K. R. 2018; 63 (3): 1109–33

    View details for DOI 10.1002/lno.10757

    View details for Web of Science ID 000432019600005

  • Exploring the Potential Impact of Greenland Meltwater on Stratification, Photosynthetically Active Radiation, and Primary Production in the Labrador Sea JOURNAL OF GEOPHYSICAL RESEARCH-OCEANS Oliver, H., Luo, H., Castelao, R. M., van Dijken, G. L., Mattingly, K. S., Rosen, J. J., Mote, T. L., Arrigo, K. R., Rennermalm, A. K., Tedesco, M., Yager, P. L. 2018; 123 (4): 2570–91
  • Ecological control of nitrite in the upper ocean NATURE COMMUNICATIONS Zakem, E. J., Al-Haj, A., Church, M. J., van Dijken, G. L., Dutkiewicz, S., Foster, S. Q., Fulweiler, R. W., Mills, M. M., Follows, M. J. 2018; 9: 1206

    Abstract

    Microorganisms oxidize organic nitrogen to nitrate in a series of steps. Nitrite, an intermediate product, accumulates at the base of the sunlit layer in the subtropical ocean, forming a primary nitrite maximum, but can accumulate throughout the sunlit layer at higher latitudes. We model nitrifying chemoautotrophs in a marine ecosystem and demonstrate that microbial community interactions can explain the nitrite distributions. Our theoretical framework proposes that nitrite can accumulate to a higher concentration than ammonium because of differences in underlying redox chemistry and cell size between ammonia- and nitrite-oxidizing chemoautotrophs. Using ocean circulation models, we demonstrate that nitrifying microorganisms are excluded in the sunlit layer when phytoplankton are nitrogen-limited, but thrive at depth when phytoplankton become light-limited, resulting in nitrite accumulation there. However, nitrifying microorganisms may coexist in the sunlit layer when phytoplankton are iron- or light-limited (often in higher latitudes). These results improve understanding of the controls on nitrification, and provide a framework for representing chemoautotrophs and their biogeochemical effects in ocean models.

    View details for PubMedID 29572474

  • Under-Ice Phytoplankton Blooms Inhibited by Spring Convective Mixing in Refreezing Leads JOURNAL OF GEOPHYSICAL RESEARCH-OCEANS Lowry, K. E., Pickart, R. S., Selz, V., Mills, M. M., Pacini, A., Lewis, K. M., Joy-Warren, H. L., Nobre, C., van Dijken, G. L., Grondin, P., Ferland, J., Arrigo, K. R. 2018; 123 (1): 90–109
  • Early Spring Phytoplankton Dynamics in the Western Antarctic Peninsula JOURNAL OF GEOPHYSICAL RESEARCH-OCEANS Arrigo, K. R., van Dijken, G. L., Alderkamp, A., Erickson, Z. K., Lewis, K. M., Lowry, K. E., Joy-Warren, H. L., Middag, R., Nash-Arrigo, J. E., Selz, V., van de Poll, W. 2017; 122 (12): 9350–69
  • Differential effects of nitrate, ammonium, and urea as N sources for microbial communities in the North Pacific Ocean LIMNOLOGY AND OCEANOGRAPHY Shilova, I. N., Mills, M. M., Robidart, J. C., Turk-Kubo, K. A., Bjorkman, K. M., Kolber, Z., Rapp, I., van Dijken, G. L., Church, M. J., Arrigo, K. R., Achterberg, E. P., Zehr, J. P. 2017; 62 (6): 2550–74

    View details for DOI 10.1002/lno.10590

    View details for Web of Science ID 000415930800015

  • Late Spring Nitrate Distributions Beneath the Ice-Covered Northeastern Chukchi Shelf JOURNAL OF GEOPHYSICAL RESEARCH-BIOGEOSCIENCES Arrigo, K. R., Mills, M. M., van Dijken, G. L., Lowry, K. E., Pickart, R. S., Schlitzer, R. 2017; 122 (9): 2409–17
  • Melting glaciers stimulate large summer phytoplankton blooms in southwest Greenland waters GEOPHYSICAL RESEARCH LETTERS Arrigo, K. R., van Dijken, G. L., Castelao, R. M., Luo, H., Rennermalm, A. K., Tedesco, M., Mote, T. L., Oliver, H., Yager, P. L. 2017; 44 (12): 6278–85
  • Regional chlorophyll a algorithms in the Arctic Ocean and their effect on satellite-derived primary production estimates DEEP-SEA RESEARCH PART II-TOPICAL STUDIES IN OCEANOGRAPHY Lewis, K. M., Mitchell, B. G., van Dijken, G. L., Arrigo, K. R. 2016; 130: 14-27
  • Mass balance estimates of carbon export in different water masses of the Chukchi Sea shelf DEEP-SEA RESEARCH PART II-TOPICAL STUDIES IN OCEANOGRAPHY Strong, A. L., Lowry, K. E., Brown, Z. W., Mills, M. M., Van Dijken, G. L., Pickart, R. S., Cooper, L. W., Frey, K. E., Benner, R., Fichot, C. G., Mathis, J. T., Bates, N. R., Arrigo, K. R. 2016; 130: 88-99
  • Spatial analysis of trends in primary production and relationship with large-scale climate variability in the Ross Sea, Antarctica (1997-2013) JOURNAL OF GEOPHYSICAL RESEARCH-OCEANS Schine, C. M., van Dijken, G., Arrigo, K. R. 2016; 121 (1): 368-386
  • Sources of iron in the Ross Sea Polynya in early summer MARINE CHEMISTRY Gerringa, L. J., Laan, P., van Dijken, G. L., Van Haren, H., de Baar, H. J., Arrigo, K. R., Alderkamp, A. 2015; 177: 447-459
  • Iron supply and demand in an Antarctic shelf ecosystem GEOPHYSICAL RESEARCH LETTERS McGillicuddy, D. J., Sedwick, P. N., Dinniman, M. S., Arrigo, K. R., Bibby, T. S., Greenan, B. J., Hofmann, E. E., Klinck, J. M., Smith, W. O., MACK, S. L., Marsay, C. M., Sohst, B. M., van Dijken, G. L. 2015; 42 (19): 8088-8097
  • Impacts of low phytoplankton NO3- :PO43- utilization ratios over the Chukchi Shelf, Arctic Ocean DEEP-SEA RESEARCH PART II-TOPICAL STUDIES IN OCEANOGRAPHY Mills, M. M., Brown, Z. W., Lowry, K. E., Van Dijken, G. L., Becker, S., Pal, S., Benitez-Nelson, C. R., Downer, M. M., Strong, A. L., Swift, J. H., Pickart, R. S., Arrigo, K. R. 2015; 118: 105-121
  • Environmental controls of marine productivity hot spots around Antarctica JOURNAL OF GEOPHYSICAL RESEARCH-OCEANS Arrigo, K. R., Van Dijken, G. L., Strong, A. L. 2015; 120 (8): 5545-5565
  • The influence of winter water on phytoplankton blooms in the Chukchi Sea DEEP-SEA RESEARCH PART II-TOPICAL STUDIES IN OCEANOGRAPHY Lowry, K. E., Pickart, R. S., Mills, M. M., Brown, Z. W., Van Dijken, G. L., Bates, N. R., Arrigo, K. R. 2015; 118: 53-72
  • Continued increases in Arctic Ocean primary production PROGRESS IN OCEANOGRAPHY Arrigo, K. R., Van Dijken, G. L. 2015; 136: 60-70
  • Characterizing the subsurface chlorophyll a maximum in the Chukchi Sea and Canada Basin DEEP-SEA RESEARCH PART II-TOPICAL STUDIES IN OCEANOGRAPHY Brown, Z. W., Lowry, K. E., Palmer, M. A., Van Dijken, G. L., Mills, M. M., Pickart, R. S., Arrigo, K. R. 2015; 118: 88-104
  • Phytoplankton blooms beneath the sea ice in the Chukchi sea DEEP-SEA RESEARCH PART II-TOPICAL STUDIES IN OCEANOGRAPHY Arrigo, K. R., Perovich, D. K., Pickart, R. S., Brown, Z. W., Van Dijken, G. L., Lowry, K. E., Mills, M. M., Palmer, M. A., Balch, W. M., Bates, N. R., Benitez-Nelson, C. R., Brownlee, E., Frey, K. E., Laney, S. R., Mathis, J., Matsuoka, A., Mitchell, B. G., Moore, G. W., Reynolds, R. A., Sosik, H. M., Swift, J. H. 2014; 105: 1-16
  • Evidence of under-ice phytoplankton blooms in the Chukchi Sea from 1998 to 2012 DEEP-SEA RESEARCH PART II-TOPICAL STUDIES IN OCEANOGRAPHY Lowry, K. E., Van Dijken, G. L., Arrigo, K. R. 2014; 105: 105-117
  • Response of marine bacterioplankton to a massive under-ice phytoplankton bloom in the Chukchi Sea (Western Arctic Ocean) DEEP-SEA RESEARCH PART II-TOPICAL STUDIES IN OCEANOGRAPHY Ortega-Retuerta, E., Fichot, C. G., Arrigo, K. R., van Dijken, G. L., Joux, E. 2014; 105: 74-84
  • Productivity in the Barents Sea - Response to Recent Climate Variability PLOS ONE Dalpadado, P., Arrigo, K. R., Hjollo, S. S., Rey, F., Ingvaldsen, R. B., Sperfeld, E., Van Dijken, G. L., Stige, L. C., Olsen, A., Ottersen, G. 2014; 9 (5)

    View details for DOI 10.1371/journal.pone.0095273

    View details for Web of Science ID 000335510600031

    View details for PubMedID 24788513

  • Productivity in the barents sea--response to recent climate variability. PloS one Dalpadado, P., Arrigo, K. R., Hjøllo, S. S., Rey, F., Ingvaldsen, R. B., Sperfeld, E., Van Dijken, G. L., Stige, L. C., Olsen, A., Ottersen, G. 2014; 9 (5)

    Abstract

    The temporal and spatial dynamics of primary and secondary biomass/production in the Barents Sea since the late 1990s are examined using remote sensing data, observations and a coupled physical-biological model. Field observations of mesozooplankton biomass, and chlorophyll a data from transects (different seasons) and large-scale surveys (autumn) were used for validation of the remote sensing products and modeling results. The validation showed that satellite data are well suited to study temporal and spatial dynamics of chlorophyll a in the Barents Sea and that the model is an essential tool for secondary production estimates. Temperature, open water area, chlorophyll a, and zooplankton biomass show large interannual variations in the Barents Sea. The climatic variability is strongest in the northern and eastern parts. The moderate increase in net primary production evident in this study is likely an ecosystem response to changes in climate during the same period. Increased open water area and duration of open water season, which are related to elevated temperatures, appear to be the key drivers of the changes in annual net primary production that has occurred in the northern and eastern areas of this ecosystem. The temporal and spatial variability in zooplankton biomass appears to be controlled largely by predation pressure. In the southeastern Barents Sea, statistically significant linkages were observed between chlorophyll a and zooplankton biomass, as well as between net primary production and fish biomass, indicating bottom-up trophic interactions in this region.

    View details for DOI 10.1371/journal.pone.0095273

    View details for PubMedID 24788513

    View details for PubMedCentralID PMC4006807

  • Light and nutrient control of photosynthesis in natural phytoplankton populations from the Chukchi and Beaufort seas, Arctic Ocean LIMNOLOGY AND OCEANOGRAPHY Palmer, M. A., Van Dijken, G. L., Mitchell, B. G., Seegers, B. J., Lowry, K. E., Mills, M. M., Arrigo, K. R. 2013; 58 (6): 2185-2205
  • Long-term trends of upwelling and impacts on primary productivity in the Alaskan Beaufort Sea DEEP-SEA RESEARCH PART I-OCEANOGRAPHIC RESEARCH PAPERS Pickart, R. S., Schulze, L. M., Moore, G. W., Charette, M. A., Arrigo, K. R., van Dijken, G., Danielson, S. L. 2013; 79: 106-121
  • Insignificant buffering capacity of Antarctic shelf carbonates GLOBAL BIOGEOCHEMICAL CYCLES Hauck, J., Arrigo, K. R., Hoppema, M., van Dijken, G. L., Voelker, C., Wolf-Gladrow, D. A. 2013; 27 (1): 11-20
  • Photoacclimation and non-photochemical quenching under in situ irradiance in natural phytoplankton assemblages from the Amundsen Sea, Antarctica MARINE ECOLOGY PROGRESS SERIES Alderkamp, A., Mills, M. M., Van Dijken, G. L., Arrigo, K. R. 2013; 475: 15-?

    View details for DOI 10.3354/meps10097

    View details for Web of Science ID 000314935000002

  • Patterns and controlling factors of species diversity in the Arctic Ocean JOURNAL OF BIOGEOGRAPHY Yasuhara, M., Hunt, G., van Dijken, G., Arrigo, K. R., Cronin, T. M., Wollenburg, J. E. 2012; 39 (11): 2081-2088
  • Annual changes in sea ice and phytoplankton in polynyas of the Amundsen Sea, Antarctica DEEP-SEA RESEARCH PART II-TOPICAL STUDIES IN OCEANOGRAPHY Arrigo, K. R., Lowry, K. E., Van Dijken, G. L. 2012; 71-76: 5-15
  • Phytoplankton biomass and pigment responses to Fe amendments in the Pine Island and Amundsen polynyas DEEP-SEA RESEARCH PART II-TOPICAL STUDIES IN OCEANOGRAPHY Mills, M. M., Alderkamp, A., Thuroczy, C., Van Dijken, G. L., Laan, P., de Baar, H. J., Arrigo, K. R. 2012; 71-76: 61-76
  • Iron from melting glaciers fuels the phytoplankton blooms in Amundsen Sea (Southern Ocean): Iron biogeochemistry DEEP-SEA RESEARCH PART II-TOPICAL STUDIES IN OCEANOGRAPHY Gerringa, L. J., Alderkamp, A., Laan, P., Thuroczy, C., de Baar, H. J., Mills, M. M., Van Dijken, G. L., van Haren, H., Arrigo, K. R. 2012; 71-76: 16-31
  • Iron from melting glaciers fuels phytoplankton blooms in the Amundsen Sea (Southern Ocean): Phytoplankton characteristics and productivity DEEP-SEA RESEARCH PART II-TOPICAL STUDIES IN OCEANOGRAPHY Alderkamp, A., Mills, M. M., Van Dijken, G. L., Laan, P., Thuroczy, C., Gerringa, L. J., de Baar, H. J., Payne, C. D., Visser, R. J., Buma, A. G., Arrigo, K. R. 2012; 71-76: 32-48
  • Key role of organic complexation of iron in sustaining phytoplankton blooms in the Pine Island and Amundsen Polynyas (Southern Ocean) DEEP-SEA RESEARCH PART II-TOPICAL STUDIES IN OCEANOGRAPHY Thuroczy, C., Alderkamp, A., Laan, P., Gerringa, L. J., Mills, M. M., Van Dijken, G. L., de Baar, H. J., Arrigo, K. R. 2012; 71-76: 49-60
  • ASPIRE The Amundsen Sea Polynya International Research Expedition OCEANOGRAPHY Yager, P. L., Sherrell, R. M., Stammerjohn, S. E., Alderkamp, A., Schofield, O., Abrahamsen, E. P., Arrigo, K. R., Bertilsson, S., Garay, D. L., Guerrero, R., Lowry, K. E., Moksnes, P., Ndungu, K., Post, A. F., Randall-Goodwin, E., Riemann, L., Severmann, S., Thatje, S., Van Dijken, G. L., Wilson, S. 2012; 25 (3): 40-53
  • Massive Phytoplankton Blooms Under Arctic Sea Ice SCIENCE Arrigo, K. R., Perovich, D. K., Pickart, R. S., Brown, Z. W., Van Dijken, G. L., Lowry, K. E., Mills, M. M., Palmer, M. A., Balch, W. M., Bahr, F., Bates, N. R., Benitez-Nelson, C., Bowler, B., Brownlee, E., Ehn, J. K., Frey, K. E., Garley, R., Laney, S. R., Lubelczyk, L., Mathis, J., Matsuoka, A., Mitchell, B. G., Moore, G. W., Ortega-Retuerta, E., Pal, S., Polashenski, C. M., Reynolds, R. A., Schieber, B., Sosik, H. M., Stephens, M., Swift, J. H. 2012; 336 (6087): 1408-1408

    Abstract

    Phytoplankton blooms over Arctic Ocean continental shelves are thought to be restricted to waters free of sea ice. Here, we document a massive phytoplankton bloom beneath fully consolidated pack ice far from the ice edge in the Chukchi Sea, where light transmission has increased in recent decades because of thinning ice cover and proliferation of melt ponds. The bloom was characterized by high diatom biomass and rates of growth and primary production. Evidence suggests that under-ice phytoplankton blooms may be more widespread over nutrient-rich Arctic continental shelves and that satellite-based estimates of annual primary production in these waters may be underestimated by up to 10-fold.

    View details for DOI 10.1126/science.1215065

    View details for Web of Science ID 000305211700035

    View details for PubMedID 22678359

  • Mapping phytoplankton iron utilization: Insights into Southern Ocean supply mechanisms JOURNAL OF GEOPHYSICAL RESEARCH-OCEANS Boyd, P. W., Arrigo, K. R., Strzepek, R., van Dijken, G. L. 2012; 117
  • THE EFFECT OF IRON LIMITATION ON THE PHOTOPHYSIOLOGY OF PHAEOCYSTIS ANTARCTICA (PRYMNESIOPHYCEAE) AND FRAGILARIOPSIS CYLINDRUS (BACILLARIOPHYCEAE) UNDER DYNAMIC IRRADIANCE JOURNAL OF PHYCOLOGY Alderkamp, A., Kulk, G., Buma, A. G., Visser, R. J., Van Dijken, G. L., Mills, M. M., Arrigo, K. R. 2012; 48 (1): 45-59
  • THE EFFECT OF IRON LIMITATION ON THE PHOTOPHYSIOLOGY OF PHAEOCYSTIS ANTARCTICA (PRYMNESIOPHYCEAE) AND FRAGILARIOPSIS CYLINDRUS (BACILLARIOPHYCEAE) UNDER DYNAMIC IRRADIANCE(1). Journal of phycology Alderkamp, A. C., Kulk, G., Buma, A. G., Visser, R. J., Van Dijken, G. L., Mills, M. M., Arrigo, K. R. 2012; 48 (1): 45–59

    Abstract

    The effects of iron limitation on photoacclimation to dynamic irradiance were studied in Phaeocystis antarctica G. Karst. and Fragilariopsis cylindrus (Grunow) W. Krieg. in terms of growth rate, photosynthetic parameters, pigment composition, and fluorescence characteristics. Under dynamic light conditions mimicking vertical mixing below the euphotic zone, P. antarctica displayed higher growth rates than F. cylindrus both under iron (Fe)-replete and Fe-limiting conditions. Both species showed xanthophyll de-epoxidation that was accompanied by low levels of nonphotochemical quenching (NPQ) during the irradiance maximum of the light cycle. The potential for NPQ at light levels corresponding to full sunlight was substantial in both species and increased under Fe limitation in F. cylindrus. Although the decline in Fv /Fm under Fe limitation was similar in both species, the accompanying decrease in the maximum rate of photosynthesis and growth rate was much stronger in F. cylindrus. Analysis of the electron transport rates through PSII and on to carbon (C) fixation revealed a large potential for photoprotective cyclic electron transport (CET) in F. cylindrus, particularly under Fe limitation. Probably, CET aided the photoprotection in F. cylindrus, but it also reduced photosynthetic efficiency at higher light intensities. P. antarctica, on the other hand, was able to efficiently use electrons flowing through PSII for C fixation at all light levels, particularly under Fe limitation. Thus, Fe limitation enhanced the photophysiological differences between P. antarctica and diatoms, supporting field observations where P. antarctica is found to dominate deeply mixed water columns, whereas diatoms dominate shallower mixed layers.

    View details for PubMedID 27009649

  • Primary productivity in the Arctic Ocean: Impacts of complex optical properties and subsurface chlorophyll maxima on large-scale estimates JOURNAL OF GEOPHYSICAL RESEARCH-OCEANS Arrigo, K. R., Matrai, P. A., Van Dijken, G. L. 2011; 116
  • Secular trends in Arctic Ocean net primary production JOURNAL OF GEOPHYSICAL RESEARCH-OCEANS Arrigo, K. R., Van Dijken, G. L. 2011; 116
  • A reassessment of primary production and environmental change in the Bering Sea JOURNAL OF GEOPHYSICAL RESEARCH-OCEANS Brown, Z. W., Van Dijken, G. L., Arrigo, K. R. 2011; 116
  • Responses of psbA, hli and ptox genes to changes in irradiance in marine Synechococcus and Prochlorococcus AQUATIC MICROBIAL ECOLOGY Berg, G. M., Shrager, J., van Dijken, G., Mills, M. M., Arrigo, K. R., Grossman, A. R. 2011; 65 (1): 1-14

    View details for DOI 10.3354/ame01528

    View details for Web of Science ID 000297117200001

  • Influence of atmospheric nutrients on primary productivity in a coastal upwelling region GLOBAL BIOGEOCHEMICAL CYCLES Mackey, K. R., Van Dijken, G. L., Mazloom, S., Erhardt, A. M., Ryan, J., Arrigo, K. R., Paytan, A. 2010; 24
  • PHOTOPHYSIOLOGY IN TWO SOUTHERN OCEAN PHYTOPLANKTON TAXA: PHOTOSYNTHESIS OF PHAEOCYSTIS ANTARCTICA (PRYMNESIOPHYCEAE) AND FRAGILARIOPSIS CYLINDRUS (BACILLARIOPHYCEAE) UNDER SIMULATED MIXED-LAYER IRRADIANCE JOURNAL OF PHYCOLOGY Mills, M. M., Kropuenske, L. R., Van Dijken, G. L., Alderkamp, A., Berg, G. M., Robinson, D. H., Welschmeyer, N. A., Arrigo, K. R. 2010; 46 (6): 1114-1127
  • STRATEGIES AND RATES OF PHOTOACCLIMATION IN TWO MAJOR SOUTHERN OCEAN PHYTOPLANKTON TAXA: PHAEOCYSTIS ANTARCTICA (HAPTOPHYTA) AND FRAGILARIOPSIS CYLINDRUS (BACILLARIOPHYCEAE) JOURNAL OF PHYCOLOGY Kropuenske, L. R., Mills, M. M., Van Dijken, G. L., Alderkamp, A., Berg, G. M., Robinson, D. H., Welschmeyer, N. A., Arrigo, K. R. 2010; 46 (6): 1138-1151
  • Photophysiology in Two Major Southern Ocean Phytoplankton Taxa: Photosynthesis and Growth of Phaeocystis antarctica and Fragilariopsis cylindrus under Different Irradiance Levels Annual Meeting of the Society-for-Integrative-and-Comparative-Biology Arrigo, K. R., Mills, M. M., Kropuenske, L. R., Van Dijken, G. L., Alderkamp, A., Robinson, D. H. OXFORD UNIV PRESS INC. 2010: 950–66

    Abstract

    The Ross Sea, Antarctica, supports two distinct populations of phytoplankton, one that grows well in sea ice and blooms in the shallow mixed layers of the Western marginal ice zone and the other that can be found in sea ice but thrives in the deeply mixed layers of the Ross Sea. Dominated by diatoms (e.g. Fragilariopsis cylindrus) and the prymnesiophyte Phaeocystis antarctica, respectively, the processes leading to the development of these different phytoplankton assemblages are not well known. The goal of this article was to gain a better understanding of the photophysiological characteristics that allow each taxon to dominate its specific habitat. Cultures of F. cylindrus and P. antarctica were each grown semi-continuously at four different constant irradiances (5, 25, 65, and 125 µmol quanta/m2/s). Fragilariopsis cylindrus produced far less photosynthetic pigment per cell than did P. antarctica but much more photoprotective pigment. Fragilariopsis cylindrus also exhibited substantially lower rates of photosynthesis and growth but also was far less susceptible to photoinhibition of cell growth. Excess photosynthetic capacity, a measure of the ability of phytoplankton to exploit variable light environments, was significantly higher in both strains of P. antarctica than in F. cylindrus. The combination of these characteristics suggests that F. cylindrus has a competitive advantage under conditions where mixed layers are shallow and light levels are relatively constant and high. In contrast, P. antarctica should dominate waters where mixed layers are deep and light levels are variable. These results are consistent with distributions of phytoplankton in the Ross Sea and suggest that light is the primary factor determining composition of phytoplankton communities.

    View details for DOI 10.1093/icb/icq021

    View details for Web of Science ID 000284430400005

    View details for PubMedID 21558252

  • Air-sea flux of CO2 in the Arctic Ocean, 1998-2003 JOURNAL OF GEOPHYSICAL RESEARCH-BIOGEOSCIENCES Arrigo, K. R., Pabi, S., Van Dijken, G. L., Maslowski, W. 2010; 115
  • Contrasting spring and summer phytoplankton dynamics in the nearshore Southern California Bight LIMNOLOGY AND OCEANOGRAPHY Santoro, A. E., Nidzieko, N. J., Van Dijken, G. L., Arrigo, K. R., Boehm, A. B. 2010; 55 (1): 264-278
  • Photophysiology in two major Southern Ocean phytoplankton taxa: Photoprotection in Phaeocystis antarctica and Fragilariopsis cylindrus LIMNOLOGY AND OCEANOGRAPHY Kropuenske, L. R., Mills, M. M., Van Dijken, G. L., Bailey, S., Robinson, D. H., Welschmeyer, N. A., Arrigo, K. R. 2009; 54 (4): 1176-1196
  • Coastal Southern Ocean: A strong anthropogenic CO2 sink GEOPHYSICAL RESEARCH LETTERS Arrigo, K. R., van Dijken, G., Long, M. 2008; 35 (21)
  • Impact of a shrinking Arctic ice cover on marine primary production GEOPHYSICAL RESEARCH LETTERS Arrigo, K. R., van Dijken, G., Pabi, S. 2008; 35 (19)
  • Primary production in the Arctic Ocean, 1998-2006 JOURNAL OF GEOPHYSICAL RESEARCH-OCEANS Pabi, S., Van Dijken, G. L., Arrigo, K. R. 2008; 113 (C8)
  • Primary production in the Southern Ocean, 1997-2006 JOURNAL OF GEOPHYSICAL RESEARCH-OCEANS Arrigo, K. R., Van Dijken, G. L., Bushinsky, S. 2008; 113 (C8)
  • Alternative photosynthetic electron flow to oxygen in marine Synechococcus BIOCHIMICA ET BIOPHYSICA ACTA-BIOENERGETICS Bailey, S., Melis, A., Mackey, K. R., Cardol, P., Finazzi, G., van Dijken, G., Berg, G. M., Arrigo, K., Shrager, J., Grossman, A. 2008; 1777 (3): 269-276

    Abstract

    Cyanobacteria dominate the world's oceans where iron is often barely detectable. One manifestation of low iron adaptation in the oligotrophic marine environment is a decrease in levels of iron-rich photosynthetic components, including the reaction center of photosystem I and the cytochrome b6f complex [R.F. Strzepek and P.J. Harrison, Photosynthetic architecture differs in coastal and oceanic diatoms, Nature 431 (2004) 689-692.]. These thylakoid membrane components have well characterised roles in linear and cyclic photosynthetic electron transport and their low abundance creates potential impediments to photosynthetic function. Here we show that the marine cyanobacterium Synechococcus WH8102 exhibits significant alternative electron flow to O2, a potential adaptation to the low iron environment in oligotrophic oceans. This alternative electron flow appears to extract electrons from the intersystem electron transport chain, prior to photosystem I. Inhibitor studies demonstrate that a propyl gallate-sensitive oxidase mediates this flow of electrons to oxygen, which in turn alleviates excessive photosystem II excitation pressure that can often occur even at relatively low irradiance. These findings are also discussed in the context of satisfying the energetic requirements of the cell when photosystem I abundance is low.

    View details for DOI 10.1016/j.bbabio.2008.01.002

    View details for Web of Science ID 000254674600004

    View details for PubMedID 18241667

  • Interannual variation in air-sea CO2 flux in the Ross Sea, Antarctica: A model analysis JOURNAL OF GEOPHYSICAL RESEARCH-OCEANS Arrigo, K. R., Van Dijken, G. L. 2007; 112 (C3)
  • Increased exposure of Southern Ocean phytoplankton to ultraviolet radiation GEOPHYSICAL RESEARCH LETTERS Lubin, D., Arrigo, K. R., van Dijken, G. L. 2004; 31 (9)
  • Annual cycles of sea ice and phytoplankton in Cape Bathurst polynya, southeastern Beaufort Sea, Canadian Arctic GEOPHYSICAL RESEARCH LETTERS Arrigo, K. R., van Dijken, G. L. 2004; 31 (8)
  • Annual changes in sea-ice, chlorophyll a, and primary production in the Ross Sea, Antarctica DEEP-SEA RESEARCH PART II-TOPICAL STUDIES IN OCEANOGRAPHY Arrigo, K. R., van Dijken, G. L. 2004; 51 (1-3): 117-138
  • Phytoplankton dynamics within 37 Antarctic coastal polynya systems JOURNAL OF GEOPHYSICAL RESEARCH-OCEANS Arrigo, K. R., van Dijken, G. L. 2003; 108 (C8)
  • Impact of iceberg C-19 on Ross Sea primary production GEOPHYSICAL RESEARCH LETTERS Arrigo, K. R., van Dijken, G. L. 2003; 30 (16)
  • Impact of a deep ozone hole on Southern Ocean primary production JOURNAL OF GEOPHYSICAL RESEARCH-OCEANS Arrigo, K. R., Lubin, D., van Dijken, G. L., Holm-Hansen, O., Morrow, E. 2003; 108 (C5)
  • A comparison between excess barium and barite as indicators of carbon export PALEOCEANOGRAPHY Eagle, M., Paytan, A., Arrigo, K. R., van Dijken, G., MURRAY, R. W. 2003; 18 (1)
  • Ecological impact of a large Antarctic iceberg GEOPHYSICAL RESEARCH LETTERS Arrigo, K. R., van Dijken, G. L., Ainley, D. G., Fahnestock, M. A., Markus, T. 2002; 29 (7)