The ecological threshold refers to a point or a section of the ecosystem that rapidly changes from one state to another, and the driving force for this transition comes from the weak additional changes of one or more key ecological factors. The ecological threshold zone implies The process of the gradual transition of the ecosystem from one stable state to another, without a sudden change like the point threshold. According to the definition above, which of the following is wrong in the following table? ['If it can be shown that preservation of 30% of native vegetation can protect most species from threats, if it is less than 30%, it will seriously threaten the survival of species, and 30% is the ecological threshold.', 'If it is found that a further increase of 3.75% of the reference temperature will threaten the local ecosystem with severe drought, 3.75% is its ecological threshold.', 'If research shows that when bird habitat decreases from 15% to 7%, bird diversity will gradually decrease, and 7% is its ecological threshold.', 'If it is found that the relative air humidity of a place in the range of 44.7% to 53% will be beneficial to the local vegetation survival, but if it is higher than 53% or lower than 44.7% will seriously affect the vegetation survival, then 44.7% and 53% Ecological threshold.']