TABLE 1.

Initial characteristics of the seawater used in the microcosm experiment.

Variable	unit	Average ± SD
NO2 + NO3	nmol L–1	453 ± 237
PO4	nmol L–1	49 ± 26
Si(OH)4	nmol L–1	1566 ± 19
DOP	nmol L–1	118 ± 22
Cyanobacteria	cells × 104 ml–1	8.5 ± 4.0
Pico- and nano-eukaryotes	cells × 103 ml–1	2.0 ± 0.0
Heterotrophic bacteria	cells × 105 ml–1	8.3 ± 9.7
APA	nmol MUF L–1 h–1	7.6 ± 0.7
P turnover-time	h	11.8 ± 2.2
Bacterial production	μg C L–1 h–1	1.5 ± 0.1
Primary production	μg C L–1 h–1	2.4 ± 1.1

Values presented are the averages and corresponding standard deviation from triplicate samples.