Treatments used in the cyanobacteria-dominated crust cultivation experiments.

Note: W10∶300 ml deionized water was added to each sample every 10 days. W5∶300 ml deionized water was added to each sample every 5 days. S: each sample was covered by a 60% shade cloth at 20 cm above the pot. NS: no shading. N: 2.10 g NH4NO3 added to each pot. NN: no NH4NO3 added to any pots. KP: 1.05 g KH2PO4 added to each pot. NKP: no H2PO4 added to any pots. Ca: 2.10 g CaCO3 added to each pot. NCa: no CaCO3 added to any pots.