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A benthic richness hotspot in the Southern Ocean: slope and shelf cryptic benthos of Shag Rocks

Published online by Cambridge University Press:  19 May 2008

David K.A. Barnes*
Affiliation:
British Antarctic Survey, NERC, High Cross, Madingley Road, Cambridge CB3 OET, UK

Abstract

Shelf and slope cryptofauna were sampled at the most northerly shelf environments within the Southern Ocean, Shag Rocks. The area is remarkably rich, with seven phyla, 10 classes, 40 families and 81 species on 0.36 m2 of shelf boulders. A large proportion of genera and species found had not been seen there before, some were new to science and species accumulation curves did not approach an asymptote. Current estimates of benthic diversity are clearly still too low if even well studied locations and depths reveal so much novelty with such little sample effort. Proportions of new species were higher in slope samples showing how little we know of this important depth. Significantly, life was just as rich and, surprisingly, abundant on boulders from continental slope depths. Clearly there are places where the continental slope around Antarctica harbours a wealth of species with potential to resupply the shelf if life was ‘bulldozed’ off it by past ice shelf expansions during glacial maxima. Some species on boulders from 1500 m also occur as shallow as the Antarctic intertidal zone. That this rich fauna was ‘Antarctic’ in character shows the extremes, e.g. sea temperature (> 4°C in summer), that they can adapt to given long enough time periods.

Type
Research Article
Copyright
Copyright © Antarctic Science Ltd 2008

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References

Arntz, W.E., Brey, T. & Gallardo, V.A. 1994. Antarctic zoobenthos. Oceanography and Marine Biology, 32, 241304.Google Scholar
Arntz, W.E., Gutt, J. & Klages, M. 1997. Antarctic marine biodiversity: an overview. In Battaglia, B., Valencia, J. & Walton, D.W.H., eds. Antarctic communities: species, structure and survival. Cambridge: Cambridge University Press, 314.Google Scholar
Arntz, W.E., Thatje, S., Gerdes, D., Gili, J.-M., Gutt, J., Jacob, U., Montiel, A., Orejas, C. & Teixido, N. 2005. The Antarctic–Magellan connection: macrobenthos ecology on the shelf and upper slope, a progress report. Scientia Marina, 69, 237269.CrossRefGoogle Scholar
Arntz, W.E., Thatje, S., Linse, K., Avila, C., Ballesteros, M., Barnes, D.K.A., Cope, T., Cristobo, F., De Broyer, C., Gutt, J., Isla, E., López-González, P., Montiel, A., Munilla, T., Ramos Esplá, A., Raupach, M., Rauschert, M., Rodriguez, E. & Teixidó, N. 2006. Missing link in the Southern Ocean: sampling the marine benthic fauna of remote Bouvet Island. Polar Biology, 29, 8396.CrossRefGoogle Scholar
Barnes, D.K.A. 2000. Diversity, recruitment and competition on island shores at polar locations compared with lower latitudes; encrusting community examples. Hydrobiologia, 440, 3744.CrossRefGoogle Scholar
Barnes, D.K.A. 2006. A most isolated benthos: coastal bryozoans of Bouvet Island. Polar Biology, 29, 114119.CrossRefGoogle Scholar
Barnes, D.K.A. & Griffiths, H.J. 2008. Biodiversity and biogeography of southern temperate and polar bryozoans. Global Ecology and Biogeography, 17, 8499.CrossRefGoogle Scholar
Barnes, D.K.A., Linse, K., Waller, C., Morely, S., Enderlein, P., Fraser, K.P.P. & Brown, M. 2006a. Shallow benthic faunal communities of South Georgia Island. Polar Biology, 29, 223228.CrossRefGoogle Scholar
Barnes, D.K.A., Fuentes, V., Clarke, A., Schloss, I.R. & Wallace, M. 2006b. Spatial and temporal variation in shallow seawater temperatures around Antarctica. Deep Sea Research II, 53, 853865.CrossRefGoogle Scholar
Brandt, A., De Broyer, C., De Mesel, I., Ellingsen, K.E., Gooday, A.J., Hilbig, B., Linse, K., Thomson, M.R.A. & Tyler, P.A. 2007. The biodiversity of the deep Southern Ocean benthos. Philosophical Transactions of the Royal Society of London, B362, 3966.CrossRefGoogle Scholar
Brey, T., Klages, M., Dahm, C., Gorny, M., Gutt, J., Hain, S., Stiller, M., Arntz, W.E., Wägele, J.-W. & Zimmerman, A. 1994. Antarctic benthic diversity. Nature, 368, 297.CrossRefGoogle Scholar
Brey, T., Dahm, C., Gorny, M., Klages, M., Stiller, M. & Arntz, W.E. 1996. Do Antarctic benthic invertebrates show an extended level of eurybathy? Antarctic Science, 8, 36.CrossRefGoogle Scholar
Clarke, A. & Johnston, N. 2003. Antarctic marine benthic diversity. Oceanography and Marine Biology, 41, 47114.Google Scholar
Clayton, M.N., Wiencke, C. & Klöser, H. 1997. New records and sub-Antarctic marine benthic macroalgae from Antarctica. Polar Biology, 17, 141149.CrossRefGoogle Scholar
Davidson, I.C. 2005. Structural gradients in an intertidal hard-bottom community: examining vertical, horizontal, and taxonomic clines in zoobenthic biodiversity. Marine Biology, 146, 827839.CrossRefGoogle Scholar
Dauvin, J.C., Kendall, M., Paterson, G., Gentil, F., Jirkov, I., Sheader, M. & De Lange, M. 1994. An initial assessment of polychaete diversity in the northeastern Atlantic Ocean. Biodiversity Letters, 2, 171181.CrossRefGoogle Scholar
Frenot, Y., Chown, S.L., Whinam, J., Selkirk, P., Convey, P., Skotnicki, M. & Bergstrom, D. 2005. Biological invasions in the Antarctic: extent, impacts and implications. Biological Reviews, 80, 4572.CrossRefGoogle ScholarPubMed
Griffiths, H.J., Linse, K. & Barnes, D.K.A. 2008. Distribution of macrobenthic taxa across the Scotia Arc, Southern Ocean. Antarctic Science, 20, 213226.CrossRefGoogle Scholar
Hayward, P.J. 1995. Antarctic Cheilostomatous Bryozoa. Oxford: Oxford University Press, 355 pp.CrossRefGoogle Scholar
Holeton, C.L., Nedelec, F., Sanders, R., Brown, L., Moore, C.M., Stevens, D.P., Heywood, K.J., Statham, P.J. & Lucas, C.H. 2005. Physiological state of phytoplankton communities in the Southwest Atlantic sector of the Southern Ocean, as measured by fast repetition rate fluorometry. Polar Biology, 29, 4452.CrossRefGoogle Scholar
Kaiser, S., Barnes, D.K.A., Linse, K. & Brandt, A. 2008. Epibenthic macrofauna associated with the shelf and slope of a young and isolated Southern Ocean island. Antarctic Science, 20, 281290.CrossRefGoogle Scholar
King, J.C., Turner, J., Marshall, G.J., Conolley, W.M. & Lachlan-Cope, T.A. 2003. Antarctic Peninsula climate variability and its causes as revealed by analysis of instrumental records. Antarctic Research Series, 79, 1730.Google Scholar
Knight-Jones, P. & Knight-Jones, E.W. 1984. Systematics, ecology and distribution of southern hemisphere spirorbids (Polychaeta; Spirorbidae). In Hutchings, P.A., ed. Proceedings of the First International Polychaete Conference, Sydney, Australia, July 1983. Sydney: The Linnean Society of New South Wales, 197210.Google Scholar
Kröncke, I. 1998. Macrofauna communities in the Amundsen Basin, at the Morris Jesup Rise and at the Yermak Plateau (Eurasian Arctic Ocean). Polar Biology, 19, 383392.Google Scholar
Kuklinski, P., Barnes, D.K.A. & Taylor, P.D. 2006. Latitudinal patterns of diversity and abundance in North Atlantic intertidal boulder-fields. Marine Biology, 149, 15771583.CrossRefGoogle Scholar
Linse, K., Griffiths, H.J., Barnes, D.K.A. & Clarke, A. 2006. Biodiversity and biogeography of Antarctic and sub-Antarctic mollusca. Deep-Sea Research II, 53, 9851008.CrossRefGoogle Scholar
Livermore, R., Hillenbrand, C.-D., Meredith, M. & Eagles, G. 2007. Drake Passage and Cenozoic climate: an open and shut case? Geochemistry, Geophysics, Geosystems, 8, 10.1029/2005GC001224CrossRefGoogle Scholar
López de la Cuadra, C.M. & Garcia Gómez, J.C. 2000. The Cheilostomate Bryozoa (Bryozoa: Cheilostomatida) collected by the Spanish ‘antartida 8611’ expedition to the Scotia Arc and South Shetland Islands. Journal of Natural History, 34, 755772.CrossRefGoogle Scholar
Meredith, M.P. & King, J.C. 2005. Rapid climate change in the ocean west of the Antarctic Peninsula during the second half of the 20th century. Geophysical Research Letters, 32, 10.1029/2005GL024042CrossRefGoogle Scholar
Peck, L.S., Webb, K. & Bailey, D. 2004. Extreme sensitivity of biological function to temperature in Antarctic marine species. Functional Ecology, 18, 625630.CrossRefGoogle Scholar
Piepenburg, D., Schmid, M.K. & Gerdes, D. 2002. The benthos off King George Island (South Shetland Islands, Antarctica): further evidence for a lack of a latitudinal biomass cline in the Southern Ocean. Polar Biology, 25, 146158.CrossRefGoogle Scholar
Ralph, R., Maxwell, J.G.H., Everson, I. & Hall, J. 1976. A record of Mytilus edulis L. from South Georgia. British Antarctic Survey Bulletin, No. 44, 101102.Google Scholar
Rowe, G., Sibuet, M., Deming, J., Khripouno, A.Tietjen, N.J., Macko, S. & Theroux, R. 1991. Total sediment biomass and preliminary estimates of organic carbon residence time in deep-sea benthos. Marine Ecology Progress Series, 79, 99114.CrossRefGoogle Scholar
Teixido, N., Garrabou, J. & Arntz, W.E. 2002. Spatial pattern quantification of Antarctic benthic communities using landscape indices. Marine Ecology Progress Series, 242, 114.CrossRefGoogle Scholar
Thatje, S., Hillenbrand, C.-D. & Larter, R.D. 2005. On the origin of Antarctic marine benthic community structure. Trends in Ecology and Evolution, 20, 534540.CrossRefGoogle ScholarPubMed
Waller, C., Barnes, D.K.A. & Convey, P. 2006. Ecological contrasts across an Antarctic land-sea interface. Austral Ecology, 31, 656666.CrossRefGoogle Scholar