Table 2. Effects of sediment type and species competition on the growth of the two species.

	Sediment type (S)		Competition (C)		S × C
Variable	F	P	F	P	F	P
(A) Spartina anglica
Biomass	26.13	<0.001	17.79	<0.001	6.73	<0.001
No. of ramets	8.45	0.001	5.73	0.006	2.83	0.036
Rhizome length	12.61	<0.001	9.75	<0.001	2.07	0.101
(B) Scirpus triqueter
Biomass	49.04	<0.001	11.55	<0.001	2.07	0.100
No. of ramets	4.53	0.016	3.00	0.060	0.43	0.784
Rhizome length	8.93	0.001	6.48	0.003	0.89	0.478

Degrees of freedom for sediment type, species competition and the interaction were (2, 44), (2, 44) and (4, 44) for Spartina and (2, 44), (2, 44) and (4, 44) for Scirpus.