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Table 1

Plant density calculation for the mesocosm experiment.

  CK Low-density Medium-density High-density

H1 M1 C1 H1M1C1 H2M2 M2C2 H2C2 H2M2C2
Hydrilla verticillata 1 0 0 1 2 2 0 2
Myriophyllum spicatum 0 1 0 1 2 0 2 2
Cabomba caroliniana 0 0 1 1 0 2 2 2
Total plants 1 1 1 3 4 4 4 6
Total densities (/m2) 6 6 6 19 25 25 25 38

Two factors were established: the plant species (Hydrilla verticillata, Myriophyllum spicatum and Cabomba caroliniana) and the density. In the mono-species treatments (H1, M1, and C1), one shoot from each species was transplanted individually into mesocosms. In the mixed treatments, shoots from the three plant species were transplanted and received mixed treatments (low-density: H1M1C1; medium-density: H2M2, M2C2, and H2C2; and high-density: H2M2C2). The low, medium and high plant densities of the three plant species were evaluated during an aquatic plant field investigation within 1 × 1 m2 mono-species quadrats in the Lake Taihu drainage basin. The total densities were calculated according to the bucket basal area (0.16 m2).

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