TABLE 1.

Development of total bacterial abundances and thymidine incorporation rates in replicate mesocosms^a

Date	Bacterial abundance (106 cells ml−1)				Thymidine uptake rate (pmol liter−1 h−1)
	+ Daphnia		Control		+ Daphnia		Control
	A	B	A	B	A	B	A	B
4 May 2001	2.79	4.00	3.19	3.14
7 May 2001	1.37	1.52	1.80	1.43	6.10	9.44	7.52	3.09
10 May 2001	1.84	1.68	1.52	1.43	1.13	2.37	1.18	1.46
13 May 2001	1.38	1.21	1.12	0.63	7.43	4.88	4.81	3.46
16 May 2001	1.37	2.55	1.07	1.06	3.98	8.86	5.76	4.03
19 May 2001	1.34	1.35	1.03	1.72	7.07	2.49	7.13	21.04
22 May 2001	0.85	0.94	0.93	2.97	3.02	2.10	4.72	15.32
25 May 2001	1.12	0.88	0.80	0.81	4.43	4.32	5.72	17.15
28 May 2001	0.99	1.83	0.83	1.17

^aMesocosms A and B were stocked with 5 Daphnia individuals liter⁻¹ or contained no zooplankton (control).