TABLE 1.

Environmental parameters measured concurrently with sample collection summarized for the three sampling stationsa

StationDepth (m)Temperature (°C)Nitrate (μM)Chlorophyll α (μg liter−1)Volumetric leucine incorporation (pM Leu h−1)
Shelf0.5-89.5 (8.6-10.6)5.9 (0-25.8)16.8 (0.9-43.8)297 (102-543)
10-258.5 (8.0-9.8)21.1 (2.8-29.3)5.0 (0.4-33.0)86 (6-515)
32-507.6 (7.2-7.9)29.6 (0.7-33.8)0.5 (0.4-1.0)10 (3-20)
Slope1.3-1011.1 (10.2-11.5)0.1 (0-0.9)0.6 (0.4-1.3)74 (21-109)
13-309.9 (9.4-10.9)0.7 (0-2.5)1.9 (0.5-3.8)31 (17-67)
35-4108.5 (5.5-9.4)14.1 (2.3-40.4)0.8 (0.3-1.6)6 (0-14)
Basin1.2-509.3 (8.8-9.8)5.1 (0.1-6.0)0.7 (0.4-1.3)10 (6-16)
60-1508.2 (7.4-9.0)16.2 (6.3-28.9)ND2 (1-3)
250-2,7004.6 (1.7-7.1)40.8 (34.7-45.1)ND1 (0-2)
  • a Values are mean values, with the range of measured values in parentheses. The volumetric leucine incorporation rate shown is the whole-seawater volumetric leucine incorporation rate. ND for the basin chlorophyll samples indicates that chlorophyll levels were below detection.