Effect of complex hydraulic variables and physicochemical factors on freshwater mussel density in the largest floodplain lake, China

Ecological Processes

Table 1 Habitat stability, sediment composition, particle size and water flow velocity in four habitats, Poyang Lake

		Habitat stability	Sediment classification	Grain size range (mm)	Water flow velocity (m/s)
Poyang Lake outflow with Yangtze River	M1	Unstable	Clay to fine gravel	< 0.005, 0.005–10	0.36 ± 0.07
Connected river channel of Poyang Lake	M2	Stable	Clay to giant sand	< 0.005, 0.005–2	0.25 ± 0.03
Main lake area of Poyang Lake	M3	Stable	Clay to fine gravel	< 0.005, 0.005–10	0.20 ± 0.02
Mouths of the rivers meeting Poyang Lake	M4	Stable	Clay to fine gravel	< 0.005, 0.005–10	0.20 ± 0.03