Title Phytoplankton and sea ice algal biomass and physiology during the transition between winter and spring (McMurdo Sound, Antarctica)
Author McMinn, A.; Martin, A.; Ryan, K.
Author Affil McMinn, A., University of Tasmania, Institute of Antarctic and Southern Ocean Studies, Hobart, Tasmania, Australia. Other: Victoria University, New Zealand
Source Polar Biology, 33(11), p.1547-1556. Publisher: Springer-Verlag, Berlin, Germany. ISSN: 0722-4060
Publication Date Nov. 2010
Notes In English. 58 refs. GeoRef Acc. No: 308854. CRREL Acc. No: 65006240
Index Terms algae; ecology; ice; photosynthesis; plant physiology; plankton; plant ecology; Antarctica; Southern Ocean--McMurdo Sound; biochemistry; habitat; McMurdo Sound; photochemistry; physiology; phytoplankton; Plantae; productivity; Ross Sea; sea ice; seasonal variations; Southern Ocean
Abstract The phytoplankton and sea ice algal communities at the end of winter in McMurdo Sound were dominated by Fragilariopsis sublineata, with Thalassiosira antarctica, Melosira adele, Pinnularia quadreata, Entomoneis kjellmannii and heterotrophic dinoflagellates also present. Sea ice algal biomass at the end of winter was very low, only 0.0500.019 mg chlalpha m-2 in 2007 and 0.2340.036 mg chlalpha m-2 in 2008, but this increased to 0.3770.078 mg chlalpha m- 2 by early October in 2007 and to 1.070.192 by late September in 2008. Under ice phytoplankton biomass remained consistently below 0.1 g chlalpha l1 throughout the measuring period in both years. The photosynthetic parameters Fv/Fm, rETRmax and alpha document microalgal communities that are mostly healthy and well adapted to their low light under ice environment. Our results also suggest that species such as Fragilariopsis sublineata are well adapted to deal with low winter light levels but are unlikely to survive an increase in irradiance, whereas other taxa, such as Thalassiosira antarctica, will do better in a higher light environment.
URL http://hdl.handle.net/10.1007/s00300-010-0844-6
Publication Type journal article
Record ID 91234