The sequence of communities of primary succession in water is

1. Phytoplankton, sedges, free-floating hydrophytes, rooted hydrophytes, grasses, and trees.
2. Phytoplankton, free-floating hydrophytes, rooted hydrophytes, sedges, grasses, and trees.
3. Free-floating hydrophytes, sedges, phytoplankton, rooted hydrophytes, grasses, and trees.
4. Phytoplankton, rooted submerged hydrophytes, floating hydrophytes, reed swamp, sedges, meadow, and trees.