Effect of permanent sea ice cover and different nutrient regimes on the phytoplankton succession of fjords of the Vestfold Hills Oasis, eastern Antarctica |
| |
| Authors: | McMinn, Andrew Bleakley, Nerida Steinburner, Kerrie Roberts, Donna Trenerry, Louise |
| |
| Affiliation: | Institute of Antarctic and Southern Ocean Studies, University of Tasmania, Box 252–77, Hobart 7001, Tasmania and 1 Centre for Palynology and Palaeoecology, Department of Geography and Environmental Sciences, Monash University, Clayton, Victoria 3168, Australia |
| |
| Abstract: | Early season phytoplankton communities in both Omega and TaynayaBays are characterized by diatoms sedimenting out of the overlyingsea ice. Initial nitrate, phosphate and silicate levels arehigh and the bay waters are covered with ice and well mixed.In Taynaya Bay the ice cover is retained throughout the seasonwhile Omega Bay is ice free for 68 weeks. After ice breakout in Omega Bay, the phytoplankton community changes from onedominated by diatoms to one dominated by the phytoflagellates,Pyramimonas spp., Cryptomonas sp. and Gymnodinium sp. In TaynayaBay the ice remained and even though phytoflagellates becamemore common, diatoms still dominated. These differences in communitycomposition result from differences in light climate, extentof stratification and nutrient levels. |
| |
| Keywords: | |
| 本文献已被 Oxford 等数据库收录！ |
|
