These findings are consistent with documented differences in the use of abscisic acid to control stomata in iso- and aniso-hydric species on short timescales, illustrating that the local environment plays a large role in determining SCP.

We show that short-term increases in water availability decreased stomatal closure points in isohydric piñon pine, making it more anisohydric, while short-term rehydration had no effect on SCP in anisohydric juniper.

My coauthors and I explored how increasing water availability affects stomatal closure points in classically isohydric piñon pine and anisohydric one-seed or Utah juniper at various spatial- (i.e., from branch, to tree, to ecosystem) and temporal- (i.e., hours to decades) scales.