No-linear dynamics of lake ecosystem in responding to changes of nutrient regimes and climate factors: Case study on Dianchi and Erhai lakes, China

As different algae growths responding to a set of nutrients can occur under conditions, the nutrient load management based on relationship between chlorophyll (Chla) and total phosphorus (TP) alone may not always effective for lake bloom control. It is clear whether lagged response reduced related utilization efficiency (UEAP), how UEAP could climate water quality factors. Here we analyzed over 20 years monitoring data in two lakes with similar geology but levels by using statistical modeling methods. The aim was reveal impact dynamics driving factors changes. results showed that one key affecting dynamics, incorporation its achieved greater reliability. UEAP, Nitrogen ratio (NPr) factor Dianchi Lake, while nitrogen (TN) air temperature (AT) were Erhai Lake. changes drove into paralysis or sensitive phase depending specific conditions. This correlated density particular those characteristic growth thresholds. future trend change will continue promote increase both lakes, severer finding here value proxy index (UEAP) associated reduction. We demonstrated procedures two-function variable prediction predict determine states ecosystem. Hence, approaches are great policy making.