Table 1. Overview of treatments for monocultures of A. filiculoides, L. minor/gibba and R. natans and the relevant competing species (A. filiculoides & L. minor/gibba and L. minor/gibba & R. natans).

Between brackets are the number of replicates.

Species	P history	Azolla		Lemna		Ricciocarpus
		Present P		Present P		Present P
		Low	High	Low	High	Low	High
Azolla	Low	A	A	B	B
		(4)	(4)	(4)	(4)
	High	A	A	B	B
		(4)	(4)	(4)	(4)
Lemna	Low	B	B	A	A	C	C
		(4)	(4)	(4)	(4)	(1)	(1)
	High	B	B	A	A	C	C
		(4)	(4)	(4)	(6)	(2)	(2)
Ricciocarpus	Low			C	C	A	A
				(2)	(2)	(2)	(2)
	High			C	C	A	A
				(2)	(2)	(2)	(2)

A: Treatments of monocultures.

B: Treatments of competition between Azolla & Lemna.

C: Treatments of competition between Lemna & Ricciocarpes.