摘要：Point intercept surveys were conducted in Heron Lake, Minnesota to identify environmental factors limiting the growth of Stuckenia pectinata (L.) B rner (sago pondweed), formerly Potamogeton pectinatus L. Stuckenia pectinata was found at 50.2% of the sample sites. Mean tuber weight was 73 mg; tuber density was 31.8 N m -2 (2.32 g m -2 ). The distribution of S. pectinata was limited by water depth and wave action close to shore and light attenuation in deeper water. There was a negative correlation (r= -0.88) between the amount of sand in the sediment and the presence of S. pectinata shoots. There was a positive correlation (r= 0.89) between the amount of silt in the sediment and the presence of S. pectinata shoots.
