| Predictor | Culm density | Statistics |
| Temperature | Recruitment | r = 0.164, p = 0.674 |
| Senescence | r = 0.123, p = 0.753 | |
| Total culm | r = −0.540, p = 0.133 | |
| Water level fluctuation | Recruitment | r = 0.299, p = 0.435 |
| Senescence | r = 0.394, p = 0.294 | |
| Total culm | r = −0.805, p = 0.009 |