I'll believe this is unexpected because I'm not a plant-ologist and don't really have well-calibrated expectations of desert plant response to temperature, but

I'll believe this is unexpected because I'm not a plant-ologist and don't really have well-calibrated expectations of desert plant response to temperature, but -- Isn't it like a known thing that photosynthesis stops happening at higher temperatures? I've been worried about the impact of days-over-100-degrees on crop production for years. Is "unexpected" in this headline standing in for "now demonstrated in the wild, counter-intuitive if you don't know that biology is highly sensitive to temperature, expected by people in the field", or if I knew more about desert plant biology, would I be more shocked than I am now?