TABLE 1.

Marine regions sampled during the present study

Marine region	Type of site	Maximal depth	Coordinates	Date(s) (mo/day/yr)	Size fraction analyzed	Library code
North Atlantic Ocean	Offshore	2,850	59°30′N, 21°08′W	6/14/98	0.2–1.6 μm	AT
Cantabrian Sea, Atlantic Ocean	Slope	132	43°42′N, 6°09′W	1/17/98	0.2–1.6 μm	CA
Alboran Sea, Mediterranean Sea	Offshore	941	36°15′N, 4°15′W	11/9/97	0.2–1.6 μm	ME
Santa Barbara Channel, Pacific Ocean	Coastal	522	34°15′N, 119°54′W	12/3/94	0.2–1.0 μm	SB
Drake Passage, north of subantarctic front	Offshore	4,520	55°39′S, 58°02′W	2/18/98	0.2–0.8 μm	DN
Drake Passage, subantarctic frontal region	Offshore	3,461	56°18′S, 57°38′W	2/17/98	0.2–0.8 μm	DF
Drake Passage, south of polar front	Offshore	3,074	60°40′S, 54°53′W	2/13/98	0.2–0.8 μm	DS
Arthur Harbor (Anvers Island), Antarctica	Coastal	20	64°46′S, 64°04′W	8/4/96, 8/16/96	30 kDa–1.6 μm	AM