iatoms varied along the ice core in both cell abundance and species composition, with a minimum in the lower layer and a peak in the platelet ice. Planktonic species constituted in total about 98% of the diatom assemblage in the surface layers of the ice core down to the thickness of 220 cm. In the bottom ice and the underlying platelet-ice layer, the contribution of planktonic diatoms was lower (60% and 65%, respectively) at the beginning of the sampling period, and then decreased further to reach 30% in the bottom ice, where a remarkable biomass increase over time was caused by in situ growth and accumulation of benthic species.
Vertical and temporal variation of diatom assemblages in land-fast ice and platelet ice in Terra Nova Bay, Ross Sea, Antarctica / Saggiomo, M.; De Stefano, M.; Mangoni, Olga; Poulin, M.; Sarno, D.; Zingone, A.; Saggiomo, V.. - (2008). (Intervento presentato al convegno 20th International Diatom Symposium tenutosi a Dubrovnik, Croatia nel 7-13 September).
Vertical and temporal variation of diatom assemblages in land-fast ice and platelet ice in Terra Nova Bay, Ross Sea, Antarctica
MANGONI, OLGA;
2008
Abstract
iatoms varied along the ice core in both cell abundance and species composition, with a minimum in the lower layer and a peak in the platelet ice. Planktonic species constituted in total about 98% of the diatom assemblage in the surface layers of the ice core down to the thickness of 220 cm. In the bottom ice and the underlying platelet-ice layer, the contribution of planktonic diatoms was lower (60% and 65%, respectively) at the beginning of the sampling period, and then decreased further to reach 30% in the bottom ice, where a remarkable biomass increase over time was caused by in situ growth and accumulation of benthic species.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
