sounds like the finch example in the Galapagos we covered in Anthro this spring…

drought hit, and the finches selected for beaks that could handle the seeds on the plants that survived the drought conditions: “Climate Change driven evolution!”

except, of course, that when the drought ended, the population selected back to the other beaks to match the food supply…

temporary selected change over a few years is not evolution, it’s just selection for short term survival. evolutionary change would be a fundamental change in the plant that results in a new species.