Table 1.

Total N and total P treatments in the microcosm.

	Treatment groups
	Blank group	Lowest-dose group	Low-dose group	Medium-dose group	High-dose group
Bucket number	a,b	1, 2	3, 4	5, 6	7, 8
TN (mg⋅L-1)	0.65	1.5	2.5	3.5	4.5
TP (mg⋅L-1)	0.015	0.15	0.25	0.35	0.45

The concentrations of TN and TP stated are added to the microcosms under five different TN and TP regimes. The blank control is at the medium nutrition level. The low- and medium-dose groups are at the middle eutrophication level, and the high-dose group is at the high eutrophication level.