Table 2. Summary of sampling dates and ATP kinetic parameters estimated from the Rigler bioassay approach.

The r² values are based on the regression statistics of substrate turnover against the concentration series of non-labeled substrate additions.

Sampling Date	Vmax (nmol L-1 h-1)	k + Sn (nmol L-1)	(k + Sn) / Vmax (h)	T0 (h)	r2
31/01/12	0.02 ± 0.003	2.24 ± 1.13	116.0 ± 56.1	66.0 ± 3.15	0.95
27/02/12	0.10 ± 0.01	4.21 ± 1.67	42.4 ± 16.1	27.9 ± 2.07	0.97
13/03/12	0.22 ± 0.03	17.5 ± 3.08	78.4 ± 8.04	67.1 ± 3.57	0.91
26/03/12	0.25 ± 0.05	16.3 ± 3.66	64.9 ± 6.07	62.5 ± 4.46	0.92
04/04/12	1.70 ± 0.03	19.9 ± 2.29	11.7 ± 1.02	9.90 ± 0.46	0.98
23/04/12	0.08 ± 0.03	12.3 ± 2.76	152.3 ± 17.2	141.2 ± 9.89	0.93
09/05/12	n.d.	n.d.	n.d.	2.80 ± 0.26	n.d.
07/06/12	0.95 ± 0.16	11.2 ± 2.04	11.8 ± 0.68	9.98 ± 1.14	0.89
25/06/12	1.01 ± 0.17	8.32 ± 1.43	8.25 ± 0.34	8.08 ± 0.07	0.92
12/07/12	0.32 ± 0.08	5.10 ± 1.28	15.83 ± 1.49	13.2 ± 0.16	0.85
20/08/12	0.94 ± 0.07	5.23 ± 0.46	5.58 ± 0.29	5.67 ± 0.06	0.97
11/09/12	0.48 ± 0.04	8.33 ± 1.23	17.5 ± 2.20	12.7 ± 0.30	0.97
25/09/12	0.04 ± 0.004	1.10 ± 0.15	27.3 ± 2.71	24.3 ± 0.31	0.98
08/10/12	0.03 ± 0.002	2.39 ± 0.23	93.9 ± 5.92	89.4 ± 5.60	0.98
22/10/12	0.01 ± 0.003	1.83 ± 0.14	18.8 ± 1.27	17.5 ± 0.40	1.00
05/11/12	0.04 ± 0.002	4.30 ± 0.29	117.1 ± 3.40	114.0 ± 1.44	0.99
19/11/12	0.01 ± 0.002	3.07 ± 0.54	315.4 ± 19.6	293.9 ± 35.6	0.94
12/12/12	0.03 ± 0.003	42.5 ± 3.78	1264.3 ± 34.3	1218.2 ± 339.3	0.97