| Title | Seasonal progression of diatom assemblages in surface waters of Ryder Bay, Antarctica |
| Author | Annett, A.L.; Carson, D.S.; Crosta, X.; Clarke, A.; Ganeshram, R.S. |
| Author Affil | Annett, A.L., University of Edinburgh, School of Geosciences, Edinburgh, United Kingdom. Other: Université Bordeaux I, France; British Antarctic Survey, United Kingdom |
| Source | Polar Biology, 33(1), p.13-29, . Publisher: Springer-Verlag, Berlin, Federal Republic of Germany. ISSN: 0722- 4060 |
| Publication Date | Jan. 2010 |
| Notes | In English. Based on Publisher- supplied data. 88 refs. Ant. Acc. No: 88571. GeoRef Acc. No: 300329 |
| Index Terms | algae; ecology; ice; plankton; plant ecology; Antarctica--Adelaide Island; Antarctica--Antarctic Peninsula; Southern Ocean; Adelaide Island; Antarctic Peninsula; Antarctica; diatoms; phytoplankton; Plantae; Ryder Bay; sea ice; seasonal variations |
| Abstract | Phytoplankton assemblages from seasonally sea-ice covered Ryder Bay (Adelaide Island, Antarctica) were studied over three austral summers (2004-2007), to link sea-ice variability and environmental conditions with algal speciation. Typical of near-shore Antarctic waters, biomass was dominated by large diatoms, although the prymnesiophyte Phaeocystis antarctica was numerically dominant. Although there was considerable interannual variability between main diatom species, high biomass of certain species or species groups corresponded consistently to certain phases of seasonal progression. We present the first documentation of an extensive bloom of the late-season diatom Proboscia inermis in February 2006, accounting for over 90% of diatom biomass. At this time, water column stratification and nutrient drawdown were high relative to other periods of the study, although carbon export was relatively low. Melt water flux in this region promotes wellstratified surface waters and high chlorophyll levels, but not necessarily concurrent increases in export production relative to seasons with lower freshwater inputs. |
| URL | http://hdl.handle.net/10.1007/s00300-009-0681-7 |
| Publication Type | journal article |
| Record ID | 64004936 |