Tuber length (a; mean ± 1SE) and tuber dry mass (b; mean ± 1SE) per 5 cm depth increments (e.g., values at 5 cm depth represent tubers found in 0–5 cm sediment depth) for the four study wetlands. Maximum sediment to a calcium hardpan differed among wetlands, with BRC being the wetland with the deepest sediments.
