Table 1.

Effects of leachates and extracts of Ludwigia hexapetala on the photosynthetic yield of target species in spring and in autumn.

		Autumn			Spring
		ATS	df	p	ATS	df	p
Myriophyllum aquaticum	Treatment	0.73	3.23	0.6	0.96	2.37	0.4
	Time	39.67	3.02	<0.0001	39.18	3.30	<0.0001
	Treatment × time	1.14	8.75	0.3	1.65	8.03	0.1
Egeria densa	Treatment	16.11	3.85	<0.0001	0.19	3.88	0.9
	Time	40.56	3.58	<0.0001	25.21	2.86	<0.0001
	Treatment × time	2.68	10.66	0.002	1.24	7.81	0.3
Ceratophyllum demersum	Treatment	5.09	2.66	0.003	1.94	3.31	0.1
	Time	6.67	1.69	0.002	11.93	2.43	<0.0001
	Treatment × time	1.20	2.01	0.3	1.4	3.5	0.2

The significant differences are indicated in bold type; ATS denotes ANOVA Type Statistic.