Table 1.

Characteristics of the samples used to generate the five libraries of eukaryotic 18S rRNA genes

LibrarySystemCharacteristicsCoordinatesDate (day/mo/yr)Temp (°C)Fraction analyzed (μm)Chl a concn (μg liter−1)
TotalIn fraction
ME-1Mediterranean (Alborán Sea)Upwelling36°14′N, 4°15′W9/11/97 18.0 0.2–50.87 0.72
ANT37 Antarctica (Weddell Sea) Ice edge60°32′S, 44°12′W 26/1/98 −1.8 0.2–1.6 0.350.01
ANT12 Antarctica (Scotia Sea) Open ocean58°16′S, 44°27′W 23/1/98 1.9 0.2–1.6 0.290.02
NA11 North Atlantic Within eddy 59°30′N, 21°8′W 14/6/98 11.2 0.2–2 0.87 0.22
NA37North Atlantic Outside eddy 59°34′N, 21°3′W 21/6/9810.5 0.2–2 0.59 0.19