Table 1.

Physicochemical parameters of the overlying water, pore water, and freeze dried sediments

	Physicochemical Parameters
Sediment	Total nitrogen (S_TN), ammonium nitrogen (S_NH4 +), nitrate‐nitrite nitrogen (S_NOx −), total phosphorus (S_TP), total organic matter (S_TOM)
Overlying water	Total nitrogen (W_TN), ammonium nitrogen (W_NH4 +), nitrate nitrogen (W_NO3 −), total phosphorus (W_TP), total organic carbon (TOC), Chemical Oxygen Demand (COD), temperature (T), chlorophyll a (Chla), pH, Secchi Disc (SD)
Porewater	Ammonium (P_NH4 +), nitrate nitrogen (P_NO3 −)