Sampling sites | Investigation frames | Number of frames with snails | Occurring rate of snails frame(%) | Number of snails | Density of snails (number/0.11m2) |
---|---|---|---|---|---|
Sedge silvergrass community | 330 | 310 | 0.94 | 428 | 1.29 |
Weed community | 330 | 330 | 1.00 | 128 | 0.39 |
3-year-old poplar plantation | 330 | 250 | 0.76 | 56 | 0.17 |
5-year-old poplar plantation | 330 | 0 | 0.00 | 0 | 0.00 |
8-year-old poplar plantation | 330 | 0 | 0.00 | 0 | 0.00 |