Table 2.

Microbiological and statistical parameters for NBW samples collected in the winter and the summer at four sampling stations in the northwestern Mediterranean Sea

SeasonStationKineticsDepth (m)Bacterial concn (104 cells ml−1)Vm (10−3μM h−1)Km(μM)Vm/Km (10−3h−1)cfrndfSsys(10−2)
WinterK1Global3513.58.2 (5)a 26.5 (21)0.310.69192.89
Low6.0 (6)9.9 (24)0.600.84101.57
High9.4 (9)75.2 (53)0.130.8972.90
K2b Global865.38.0 (7)14.1 (35)0.570.65262.52
Low6.7 (11)7.5 (51)0.900.82141.95
Highc 8.9 (16)45.4 (143)0.200.88103.14
K3Global8000.52.8 (4)8.1 (26)0.350.63191.11
Low2.5 (6)4.8 (35)0.530.81100.80
High3.7 (7)115.0 (33)0.0320.9170.80
K4Global9202.66.1 (7)7.9 (35)0.770.75201.39
Low5.3 (5)4.1 (26)1.280.88100.48
High8.4 (12)74.8 (43)0.110.8381.49
SummerK5Global3547.322.8 (5)35.5 (20)0.640.79263.46
Low16.6 (9)15.6 (28)1.070.97142.62
High26.2 (17)75.0 (79)0.350.97103.63
K6Global8616.530.3 (4)30.6 (18)0.990.77264.33
Low21.8 (6)11.8 (23)1.850.85142.84
High38.1 (14)99.8 (53)0.380.98103.84
K7Global8623.222.7 (4)34.1 (18)0.670.78263.14
Low17.2 (7)16.1 (22)1.070.87142.10
High31.4 (17)149.4 (49)0.210.98102.98
K8b Global8002.213.2 (5)7.3 (32)1.820.65263.04
Low12.7 (9)6.3 (46)2.030.82142.99
Highc 13.5 (20)9.5 (590)1.430.96103.36
K9Global9200.716.6 (4)5.9 (27)2.830.64265.74
Low20.5 (4)11.7 (15)1.760.85143.43
High15.1 (7)AVd AV0.88104.70
  • a The values in parentheses are standard errors, expressed as percentages.

  • b Biphasic extracellular proteolytic activity was not revealed by the F test at P < 0.1.

  • c Kinetic parameters were not determined.

  • d AV, aberrant value.