Ecological threshold refers to a point or an interval at which the ecosystem changes rapidly from one state to another. The driving force for this transformation comes from the weak additional changes of one or more key ecological factors. The Ecological Threshold Zone implies the gradual transformation process of the ecosystem from one stable state to another, rather than the sudden transformation like the point threshold.
According to the above definition, if it is found that the local ecosystem will be threatened by serious drought if the temperature rises by 3.75% of the benchmark temperature, then 3.75% is its ecological threshold is wrong.