The so enlarged structure of the stomata really made made me a believer in its dynamic nature (opening and closing during gaseous exchange)
Nature is just wonderful

As regard your question, i might not really be able to give a satisfactory answer but one thing I know for sure is that, the negative feedback loop comes into play in such situations.

Just the way humans body detect that there low sugar level and as such release the glucagon hormone which activate the release and breakdown of glucose from glycogen. There is always a compensatory mechanism to balance deficits