Oceanography The Official Magazine of
The Oceanography Society
Volume 26 Issue 03

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Volume 26, No. 3
Pages 190 - 203


West Antarctic Peninsula: An Ice-Dependent Coastal Marine Ecosystem in Transition

By Hugh W. Ducklow , William R. Fraser , Michael P. Meredith, Sharon E. Stammerjohn, Scott C. Doney, Douglas G. Martinson, Sévrine F. Sailley, Oscar M. Schofield , Deborah K. Steinberg, Hugh J. Venables , and Charles D. Amsler 
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Article Abstract

The extent, duration, and seasonality of sea ice and glacial discharge strongly influence Antarctic marine ecosystems. Most organisms’ life cycles in this region are attuned to ice seasonality. The annual retreat and melting of sea ice in the austral spring stratifies the upper ocean, triggering large phytoplankton blooms. The magnitude of the blooms is proportional to the winter extent of ice cover, which can act as a barrier to wind mixing. Antarctic krill, one of the most abundant metazoan populations on Earth, consume phytoplankton blooms dominated by large diatoms. Krill, in turn, support a large biomass of predators, including penguins, seals, and whales. Human activity has altered even these remote ecosystems. The western Antarctic Peninsula region has warmed by 7°C over the past 50 years, and sea ice duration has declined by almost 100 days since 1978, causing a decrease in phytoplankton productivity in the northern peninsula region. Besides climate change, Antarctic marine systems have been greatly altered by harvesting of the great whales and now krill. It is unclear to what extent the ecosystems we observe today differ from the pristine state.


Ducklow, H.W., W.R. Fraser, M.P. Meredith, S.E. Stammerjohn, S.C. Doney, D.G. Martinson, S.F. Sailley, O.M. Schofield, D.K. Steinberg, H.J. Venables, and C.D. Amsler. 2013. West Antarctic Peninsula: An ice-dependent coastal marine ecosystem in transition. Oceanography 26(3):190–203, https://doi.org/10.5670/oceanog.2013.62.


Ainley, D.G. 2002. The Adélie Penguin: Bellwether of Climate Change. Columbia University Press, New York, 416 pp.

Ainley, D.G., and D. Pauly. 2013. Fishing down the food web of the Antarctic continental shelf and slope. Polar Record, https://doi.org/10.1017/S0032247412000757.

Amsler, C.D., J.B. Mcclintock, and B.J. Baker. 2008. Macroalgal chemical defenses in polar marine communities. Pp. 91–103 in Algal Chemical Ecology. C.D. Amsler ed., Springer-Verlag.

Anadón, R., and M. Estrada. 2002. The FRUELA cruises: A carbon flux study in productive areas of the Antarctic Peninsula (December 1995–February 1996). Deep Sea Research Part II 49:567–583, https://doi.org/10.1016/S0967-0645(01)00112-6.

Anderson, J.B. 1999. Antarctic Marine Geology. Cambridge University Press, 300 pp.

Atkinson, A., V. Siegel, E. Pakhomov, and P. Rothery. 2004. Long-term decline in krill stock and increase in salps within the Southern Ocean. Nature 432:100–103, https://doi.org/​10.1038/nature02996.

Atkinson, A., V. Siegel, E.A. Pakhomov, P. Rothery, V. Loeb, R.M. Ross, L.B. Quetin, K. Schmidt, P. Fretwell, E.J. Murphy, and others. 2008. Oceanic circumpolar habitats of Antarctic krill. Marine Ecology Progress Series 362:1–23, https://doi.org/10.3354/meps07498.

Castañeda-Moya, E., R.R. Twilley, and V.H. Rivera-Monroy. In press. Allocation of biomass and net primary productivity of mangrove forests along environmental gradients in the Florida Coastal Everglades, USA. Forest Ecology and Management.

Chapman, E.W., C.A. Ribic, and W.R. Fraser. 2004. The distribution of seabirds and pinnipeds in Marguerite Bay and their relationship to physical features during austral winter 2001. Deep Sea Research Part II 51:2,261–2,278, https://doi.org/10.1016/j.dsr2.2004.07.005.

Chiuchiolo, A.L., R.M. Dickhut, M.A. Cochran, and H.W. Ducklow. 2004. Persistent organic pollutants at the base of the Antarctic marine food web. Environmental Science & Technology 38:3,551–3,557, https://doi.org/​10.1021/es0351793.

Clarke, A., M.P. Meredith, M.I. Wallace, M.A. Brandon, and D.N. Thomas. 2008. Seasonal and interannual variability in temperature, chlorophyll and macronutrients in northern Marguerite Bay, Antarctica. Deep Sea Research Part II 55:1,988–2,006, https://doi.org/10.1016/j.dsr2.2008.04.035.

Clarke, A., E.J. Murphy, M.P. Meredith, J.C. King, L.S. Peck, D.K.A. Barnes, and R.C. Smith. 2007. Climate change and the marine ecosystem of the western Antarctic Peninsula. Philosophical Transactions of the Royal Society B 362:149–166, https://doi.org/10.1098/rstb.2006.1958.

Cook, A.J., A.J. Fox, D.J. Vaughan, and J.G. Ferrigno. 2005. Retreating glacier fronts on the Antarctic Peninsula over the past half-century. Science 308:541–544, https://doi.org/​10.1126/science.1104235.

Costa, D.P., and D.E. Crocker. 1996. Marine mammals of the Southern Ocean. Pp. 287–301 in Foundations for Ecological Research West of the Antarctic Peninsula. R.M. Ross, E.E. Hofmann, and L.B. Quetin, eds, American Geophysical Union, Washington, DC.

Dickhut, R.M., A. Cincinelli, M. Cochran, and H.W. Ducklow. 2005. Atmospheric concentrations and air-water flux of organochlorine pesticides along the western Antarctic Peninsula. Environmental Science & Technology 39:465–470, https://doi.org/​10.1021/es048648p.

Ducklow, H.W., K. Baker, D.G. Martinson, L.B. Quetin, R.M. Ross, R.C. Smith, S.E. Stammerjohn, M. Vernet, and W.R. Fraser. 2007. Marine pelagic ecosystems: The West Antarctic Peninsula. Philosophical Transactions of the Royal Society of London B 362:67–94, https://doi.org/10.1098/rstb.2006.1955.

Ducklow, H., A. Clarke, R. Dickhut, S.C. Doney, H.N. Geisz, K. Huang, D.G. Martinson, M.P. Meredith, H.V. Moeller, M. Montes-Hugo, and others. 2012. The marine ecosystem of the West Antarctic Peninsula. Pp. 121–159 in Antarctica: An Extreme Environment in a Changing World. A. Rogers, N. Johnston, A. Clarke, and E. Murphy, eds, Blackwell.

Fraser, W.R., and E.E. Hofmann. 2003. A predator’s perspective on causal links between climate change, physical forcing and ecosystem response. Marine Ecology Progress Series 265:1–15.

Fraser, W.R., D.L. Patterson-Fraser, C.A. Ribic, O. Schofield, and H. Ducklow. 2013. A nonmarine source of variability in Adélie penguin demography. Oceanography 26(3):207–209, https://doi.org/10.5670/oceanog.2013.64.

Fraser, W.R., and W.Z. Trivelpiece. 1996. Factors controlling the distribution of seabirds: Winter-summer heterogeneity in the distribution of Adélie penguin populations. Pp. 257–272 in Foundations for Ecological Research West of the Antarctic Peninsula. R.M. Ross, E.E. Hofmann, and L.B. Quetin, eds, American Geophysical Union Antarctic Research Series, Washington, DC, https://doi.org/10.1029/AR070p0257.

Fraser, W.R., W.Z. Trivelpiece, D.G. Ainley, and S.G. Trivelpiece. 1992. Increases in Antarctic penguin populations: Reduced competition with whales or a loss of sea ice due to environmental warming? Polar Biology 11:525–531, https://doi.org/10.1007/BF00237945.

Geisz, H.N.C. 2010. Persistent organic pollutants (POPs) as tracers of environmental change and Antarctic seabird ecology. PhD dissertation, The College of William & Mary.

Geisz, H.N., R.M. Dickhut, M.A. Cochran, W.R. Fraser, and H.W. Ducklow. 2008. Melting glaciers: A probable source of DDT to the Antarctic marine ecosystem. Environmental Science & Technology 42:3,958–3,962, https://doi.org/10.1021/es702919n.

Grzymski, J.J., C.S. Riesenfeld, T.J. Williams, A.M. Dussaq, H.W. Ducklow, M. Erickson, R. Cavicchioli, and A.E. Murray. 2012. A metagenomic assessment of winter and summer bacterioplankton from Antarctica Peninsula coastal surface waters. The ISME Journal 6:1,901–1,915, https://doi.org/​10.1038/ismej.2012.31.

Hardy, A. 1967. Great Waters. Collins.

Harrer, S.L., D.C. Reed, S.J. Holbrook, and R.J. Miller. In press. Patterns and controls of the dynamics of net primary production by understory macroalgal assemblages in giant kelp forests off southern California. Journal of Phycology.

Herbert, D., and J. Fourqurean. 2009. Phosphorus availability and salinity control productivity and demography of the seagrass Thalassia testudinum in Florida Bay. Estuaries and Coasts 32:188–201, https://doi.org/10.1007/s12237-008-9116-x.

Hewes, C.D., E. Sakshaug, F.M.H. Reid, and O. Holm-Hansen. 1990. Microbial autotrophic and heterotrophic eucaryotes in Antarctic waters: Relationships between biomass and chlorophyll, adenosine triphosphate and particulate organic carbon. Marine Ecology Progress Series 63:27–35.

Hofmann, E.E., P.H. Wiebe, D.P. Costa, and J.J. Torres. 2004. An overview of the Southern Ocean Global Ocean Ecosystems Dynamics program. Deep Sea Research Part II 51:1,921–1,924, https://doi.org/​10.1016/j.dsr2.2004.08.007.

Holland, P.R., and R. Kwok. 2012. Wind-driven trends in Antarctic sea-ice drift. Nature Geoscience 5:872–875, https://doi.org/​10.1038/ngeo1627.

Huang, Y.M., M.O. Amsler, J.B. Mcclintock, C.D. Amsler, and B.J. Baker. 2007. Patterns of gammarid amphipod abundance and species composition associated with dominant subtidal macroalgae along the western Antarctic Peninsula. Polar Biology 30:1,417–1,430, https://doi.org/10.1007/s00300-007-0303-1.

Huang, K., H. Ducklow, M. Vernet, N. Cassar, and M.L. Bender. 2012. Export production and its regulating factors in the West Antarctica Peninsula region of the Southern Ocean. Global Biogeochemical Cycles 26, GB2005, https://doi.org/10.1029/2010GB004028.

Huntley, M.E., D.M. Karl, P.P. Niiler, and O. Holm-Hansen. 1991. Research on Antarctic coastal ecosystem rates (RACER): An interdisciplinary field experiment. Deep-Sea Research Part A 38:911–941, https://doi.org/​10.1016/0198-0149(91)90090-3.

Kirwan, M.L., R.R. Christian, L.K. Blum, and M.M. Brinson. 2012. On the relationship between sea level and Spartina alterniflora production. Ecosystems 15:140–147, https://doi.org/10.1007/s10021-011-9498-7.

Knox, G.A. 2006. The Biology of the Southern Ocean. CRC Press, 604 pp.

Laws, R.M. 1985. The ecology of the Southern Ocean. American Scientist 73:26–40.

Lee, S., and S.B. Feldstein. 2013. Detecting ozone- and greenhouse gas-driven wind trends with observational data. Science 339:563–567, https://doi.org/10.1126/science.1225154.

Lomas, M.W., N.R. Bates, R.J. Johnson, A.H. Knap, D.K. Steinberg, and C.A. Carlson. 2013. Two decades and counting: 24-years of sustained open ocean biogeochemical measurements in the Sargasso Sea. Deep Sea Research Part II, https://doi.org/10.1016/j.dsr2.2013.01.008.

Maksym, T., S.E. Stammerjohn, S. Ackley, and R. Massom. 2012. Antarctic sea ice—A polar opposite? Oceanography 25(3):140–151, https://doi.org/10.5670/oceanog.2012.88.

Marshall, G.J., P.A. Stott, J. Turner, W.M. Connolley, J.C. King, and T.A. Lachlan-Cope. 2004. Causes of exceptional atmospheric circulation changes in the Southern Hemisphere. Geophysical Research Letters 31, L14205, https://doi.org/​10.1029/2004GL019952.

Martinson, D.G. 2012. Antarctic circumpolar current’s role in the Antarctic ice system: An overview. Palaeogeography, Palaeoclimatology, Palaeoecology 335/336:71–74, https://doi.org/10.1016/j.palaeo.2011.04.007.

Martinson, D.G., and D.C. McKee. 2012. Transport of warm upper circumpolar deep water onto the western Antarctic Peninsula continental shelf. Ocean Science 8:433–442, https://doi.org/​10.5194/os-8-433-2012.

Martinson, D.G., S.E. Stammerjohn, R.A. Iannuzzi, R.C. Smith, and M. Vernet. 2008. Western Antarctic Peninsula physical oceanography and spatio-temporal variability. Deep Sea Research Part II 55:1,964–1,987, https://doi.org/​10.1016/j.dsr2.2008.04.038.

Massom, R.A., S.E. Stammerjohn, R.A. Iannuzzi, R.C. Smith, and M. Vernet. 2008. West Antarctic Peninsula sea ice in 2005: Extreme ice compaction and ice edge retreat due to strong anomaly with respect to climate. Journal of Geophysical Research 113, C02S20, https://doi.org/10.1029/2007JC004239.

Massom, R.A., S.E. Stammerjohn, W. Lefebvre, S.A. Harangozo, N. Adams, T.A. Scambos, M.J. Pook, and C. Fowler. 2006. Extreme anomalous atmospheric circulation in the West Antarctic Peninsula region in austral spring and summer 2001/02, and its profound impact on sea ice and biota. Journal of Climate 19:3,544–3,571, https://doi.org/​10.1175/JCLI3805.1.

Meredith, M.P., and J.C. King. 2005. Rapid climate change in the ocean west of the Antarctic Peninsula during the second half of the 20th century. Geophysical Research Letters 32, L19604, https://doi.org/​10.1029/2005GL024042.

Meredith, M.P., I.A. Renfrew, A. Clarke, J.C. King, and M.A. Brandon. 2004. Impact of the 1997/98 ENSO on upper ocean characteristics in Marguerite Bay, western Antarctic Peninsula. Journal of Geophysical Research 109, C09013, https://doi.org/10.1029/2003JC001784.

Meredith, M.P., H.J. Venables, A. Clarke, H.W. Ducklow, M. Erickson, M.J. Leng, J.T.M. Lenaerts, and M.R. van den Broeke. 2013. The freshwater system west of the Antarctic Peninsula: Spatial and temporal changes. Journal of Climate 26:1,669–1,684, https://doi.org/10.1175/JCLI-D-12-00246.1.

Moe, R.L., and T.E. DeLaca. 1976. Occurrence of macroscopic algae along the Antarctic Peninsula. Antarctic Journal of the United States 11:20–24.

Moffat, C., R.C. Beardsley, B. Owens, and N. Van Lipzig. 2008. A first description of the Antarctic Peninsula Coastal Current. Deep Sea Research Part II 55:277–293, https://doi.org/10.1016/​j.dsr2.2007.10.003.

Moline, M.A., H. Claustre, T.K. Frazer, O. Schofield, and M. Vernet. 2004. Alteration of the food web along the Antarctic Peninsula in response to a regional warming trend. Global Change Biology 10:1,973–1,980, https://doi.org/10.1111/j.1365-2486.2004.00825.x.

Montes-Hugo, M., S.C. Doney, H.W. Ducklow, W.R. Fraser, D.G. Martinson, S.E. Stammerjohn, and O. Schofield. 2009. Recent changes in phytoplankton communities associated with rapid regional climate change along the western Antarctic Peninsula. Science 323:1,470–1,473, https://doi.org/10.1126/science.1164533.

Murphy, E.J., E.E. Hofmann, J.L. Watkins, N.M. Johnston, A. Pinones, T. Ballerini, S.L. Hill, P.N. Trathan, G.A. Tarling, R.A. Cavanagh, and others. 2013. Comparison of the structure and function of Southern Ocean regional ecosystems: The Antarctic Peninsula and South Georgia. Journal of Marine Systems 109:22–42, https://doi.org/10.1016/​j.jmarsys.2012.03.011.

Pakhomov, E.A., P.W. Froneman, and R. Perissinotto. 2002. Salp/krill interactions in the Southern Ocean: Spatial segregation and implications for the carbon flux. Deep Sea Research Part II 49:1,881–1,907, https://doi.org/10.1016/S0967-0645(02)00017-6.

Pauly, D., V. Christensen, J. Dalsgaard, R. Froese, and F. Torres. 1998. Fishing down marine food webs. Science 279:860–863, https://doi.org/10.1126/science.279.5352.860.

Pennings, S.C., M. Alber, C.R. Alexander, M. Booth, A. Burd, W.-J. Cai, C. Craft, C.B. DePratter, D. Di Iorio, C. Hopkinson, and others. 2012. South Atlantic tidal wetlands. Pp. 45–61 in Wetland Habitats of North America: Ecology and Conservation Concerns. A. Baldwin and D. Batzer, eds, University of California Press.

Reed, D.C., A.R. Rassweiler, and K.K. Arkema. 2008. Biomass rather than growth determines net primary production by giant kelp. Ecology 89:2,493–2,505, https://doi.org/​10.1890/07-1106.1.

Ross, R.M., E.E. Hofmann, and L.B. Quetin, eds. 1996. Foundations for Ecological Research West of the Antarctic Peninsula. Antarctic Research Series, vol. 70, American Geophysical Union, Washington, DC, 448 pp, https://doi.org/​10.1029/AR070.

Ross, R.M., L.B. Quetin, D.G. Martinson, R.J. Iannuzzi, S. Stammerjohn, and R.C. Smith. 2008. Palmer LTER: Patterns of distribution of five dominant zooplankton species in the epipelagic zone west of the Antarctic Peninsula, 1993–2004. Deep Sea Research Part II 55:2,086–2,105, https://doi.org/​10.1016/j.dsr2.2008.04.037.

Schofield, O., H. Ducklow, K. Bernard, S. Doney, D. Patterson-Fraser, K. Gorman, D. Martinson, M. Meredith, G. Saba, S. Stammerjohn, and others. 2013. Penguin biogeography along the West Antarctic Peninsula: Testing the Canyon Hypothesis with Palmer LTER observations. Oceanography 26(3):204–206, https://doi.org/​10.5670/oceanog.2013.63.

Siniff, D.B., R.A. Garrott, J.J. Rotella, W.R. Fraser, and D.G. Ainley. 2008. Opinion: Projecting the effects of environmental change on Antarctic seals. Antarctic Science 20:425–435, https://doi.org/10.1017/S0954102008001351.

Smith, R.C., D.G. Martinson, S.E. Stammerjohn, R.A. Iannuzzi, and K. Ireson. 2008. Bellingshausen and western Antarctic Peninsula region: Pigment biomass and sea-ice spatial/temporal distributions and interannual variability. Deep Sea Research Part II 55:1,949–1,963, https://doi.org/10.1016/j.dsr2.2008.04.027.

Stammerjohn, S.E., M.R. Drinkwater, R.C. Smith, and X. Liu. 2003. Ice-atmosphere interactions during sea-ice advance and retreat in the western Antarctic Peninsula region. Journal of Geophysical Research 108, 3329, https://doi.org/10.1029/2002JC001543.

Stammerjohn, S., T. Maksym, P. Heil, R.A. Massom, M. Vancoppenolle, and K.C. Leonard. 2011. The influence of winds, sea surface temperature and precipitation anomalies on Antarctic Regional sea ice conditions during IPY 2007. Deep Sea Research Part II 58:999–1,018, https://doi.org/​10.1016/j.dsr2.2010.10.026.

Stammerjohn, S.E., D.G. Martinson, R.C. Smith, and S.A. Iannuzzi. 2008a. Sea ice in the western Antarctic Peninsula region: Spatio-temporal variability from ecological and climate change perspectives. Deep Sea Research Part II 55:2,041–2,058, https://doi.org/​10.1016/j.dsr2.2008.04.026.

Stammerjohn, S.E., D.G. Martinson, R.C. Smith, X. Yuan, and D. Rind. 2008b. Trends in Antarctic Annual Sea Ice Retreat and Advance and their Relation to ENSO and Southern Annular Mode Variability. Journal of Geophysical Research 113, C03S90, https://doi.org/10.1029/2007JC004269.

Stammerjohn, S., R.A. Massom, D. Rind, and D. Martinson. 2012. Regions of rapid sea ice change: An inter-hemispheric seasonal comparison. Geophysical Research Letters 39, L06501, https://doi.org/10.1029/2012GL050874.

Steinberg, D.K., D.G. Martinson, and D.P. Costa. 2012. Two decades of pelagic ecology of the Western Antarctic Peninsula. Oceanography 25(3):56–67, https://doi.org/10.5670/oceanog.2012.75.

Tarling, G.A., T. Klevjer, S. Fielding, J. Watkins, A. Atkinson, E. Murphy, R. Korb, M. Whitehouse, and R. Leaper. 2009. Variability and predictability of Antarctic krill swarm structure. Deep Sea Research Part I 56:1,994–2,012, https://doi.org/​10.1016/j.dsr.2009.07.004.

Thompson, D.W.J., S. Solomon, P.J. Kushner, M.H. England, K.M. Grise, and D.J. Karoly. 2011. Signatures of the Antarctic ozone hole in Southern Hemisphere surface climate change. Nature Geoscience 4:741–749, https://doi.org/​10.1038/ngeo1296.

Trivelpiece, W.Z., J.T. Hinke, A.K. Miller, C.S. Reiss, S.G. Trivelpiece, and G.M. Watters. 2011. Variability in krill biomass links harvesting and climate warming to penguin population changes in Antarctica. Proceedings of the National Academy of Sciences of the United States of America 108:7,625–7,628, https://doi.org/10.1073/pnas.1016560108.

Turner, J.R., A. Bindschadler, P. Convey, G. Di Prisco, E. Fahrbach, J. Gutt, D.A. Hodgson, P.A. Mayewski, and C.P. Summerhayes. 2009. Antarctic Climate Change and the Environment. Scientific Committee on Antarctic Research, 526 pp.

Turner, J., T. Maksym, T. Phillips, G.J. Marshall, and M.P. Meredith. 2012. The impact of changes in sea ice advance on the large winter warming on the western Antarctic Peninsula. International Journal of Climatology 30:852–861, https://doi.org/10.1002/joc.3474.

Venables, H.J., A. Clarke, and M.P. Meredith. 2013. Wintertime controls on summer stratification and productivity at the western Antarctic Peninsula. Limnology and Oceanography 58:1,035–1,047, https://doi.org/10.4319/lo.2013.58.3.1035.

Vernet, M., D. Martinson, R. Iannuzzi, S. Stammerjohn, W. Kozlowski, K. Sines, R.C. Smith, and I. Garibotti. 2008. Primary production within the sea-ice zone west of the Antarctic Peninsula: I—Sea ice, summer mixed layer, and irradiance. Deep Sea Research Part II 55:2,068–2,085, https://doi.org/​10.1016/j.dsr2.2008.05.021.

Waugh, D.W., F. Primeau, T. Devries, and M. Holzer. 2013. Recent changes in the ventilation of the southern oceans. Science 339:568–570, https://doi.org/​10.1126/science.1225411.

White, B.A., J.B. McClintock, C.D. Amsler, C.L. Mah, M.O. Amsler, S. White, L.B. Quetin, and R.M. Ross. 2012. The abundance and distribution of echinoderms in nearshore hard-bottom habitats near Anvers Island, Western Antarctic Peninsula. Antarctic Science 24:554–560, https://doi.org/10.1017/S0954102012000569.

Wiencke, C., and C.D. Amsler. 2012. Seaweeds and their communities in polar regions. Pp. 265–294 in Seaweed Biology: Novel Insights into Ecophysiology, Ecology and Utilization. C. Wiencke and K. Bischof, eds, Springer-Verlag.

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