Textural composition, chlorophyll a and nutrients (phosphate, nitrate and silicate) of newly formed sea ice from the Weddell Sea, Antarctica, were analyzed during austral autumn in 1992. Frazil ice, congelation ice and mixed frazil/congelation ice were the main textural types. Mean concentrations of chlorophyll a and nutrients in sea ice were varied considerably with ice texture. High chlorophyll a occurred mostly in ice floes consisting predominantly or mainly of frazil ice. Nutrients showed an inverse relationship being significantly lower in frazil ice than in congelation ice. Similar observations were made for one year old sea ice.
Ecology of newly formed sea ice in the Weddell Sea , Antarctica I . chlorophyll a and nutrients
1 Cota G F, Arming J L, Harris L R, Harrison W G, Smith E H (1990) : Impact of ice algae on inorganic nutrients in sea water and sea ice in Barrow Strait, NWT, Canada, during spring. Can. J. Fish Aquat. Sci., 47: 1402〜1415. DOI:10.1139/f90-159
2 Clarke D B, Ackley S F (1984): Sea ice structure and biological activity in the Antarctic marginal ice zone. J. Geophys. Res., 89-C2: 2087〜2095.
3 Dieckmann D S, Lange M A, Ackley S F, Jennings J (1991): The nutrient status in sea ice of the weddell Sea during winter, effects of sea ice texture and algae. Polar Biol., 11:449〜456.
4 Garrison D L, Ackley S F, Buck K R (1983): A physical mechanism for establishing algal populations in frazil ice. Nature, 306 (5941): 363〜365. DOI:10.1038/306363a0
5 Garrison D L, Buck K R (1987): Algal assembl ages in Antarctic pack ice and ice-edge plankton. J. Phycol., 23: 564〜572.
6 Garrison D L, Buck K R (1989): The biota of Antarctic pack ice in the Weddell Sea and Antarcrtic Penin, sula regions. Polar Biol., 10:211〜219.
7 Hoshiai T (1985) , Autumnal proliferation of ice algae in Antarctic sea ice. In: Antarctic nutrient cycles and food webs, Ed. by Siegfried W R, Condy P R, Laws R M,Springer-Verlag, Berlin, Printed in Germany, 89〜92.
8 Lange M A (1990): Development and physical properties of sea ice in the Weddell Sea, Antarctica. Proc. of the W.F. Weeks Seaice Symp., CRREL monograph 90-1: 22〜28.
9 Legendre L, Ackley S F, Dieckmann G S, Gulliksen 15, Horner R, Hoshiai T et al (1992): Ecology of sea ice biota 2. Global significance. Polar Biol., 12: 429〜444.
10 Parsons T , Maita Y, Lalli C M (1984) , Amanual of chemical and biological methods for sea water analysis. In: Biological ocean ographic processes, 3rd, Ed. by Parsons et ul. , Printed in Great Britain by A. Wheaton Co. Ltd. Exeter., 173.
11 Richter-Menge J A, Ackley S F (1990): Comparison of the compressive strength of Antarctic frazil ice and laboratory grown columner ice, Antarctica. Proc. of the W. F. Weeks Sea icc Symp., CRREL monograph 90-1:22〜28.
12 Spindler M, Dieckmann G, Lange M A (1990): Seasonal and geographic variation in sea ice community structure of the Weddell Sea, Antarctica, Antarctic Ecosystems. In: Ecological change and conservation, Ed. by Kerry K and Hampel G, Springer-Verlag, Berlin, Printed in Germany, 129〜135.
13 Wang Zipan, Dieckmann G (1993): Ecological environmental features of Antarctic sea ice and its role in the marine ecosystems. Antarctic Research (Chinese Edition), 5 (1): 1〜13.