An oak leaf with only the biggest vein left green. The rest is like beige parchment, dead. Such a leaf has lost nearly all capability of photosynthesis.

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   Petra van Cronenburg (naturemc@mastodon.online)'s status on Friday, 03-Jul-2026 00:12:07 JST Petra van Cronenburg

   After the #extremeHeat in France, the danger of #wildfires is enormous. #Heatwave and #soil #dryness didn't change much for the plants this week - with "cool" 30°C and full sunshine.

   #Trees try to resist by getting "dried" #leaves. At a certain heat temp., the process starts at the exterieur like burnings. Then the green vanishes to the centre until #photosynthesis is stopped. If the plant can't get soon enough rain to regenerate, it can die. Food crops die before trees.

   #oak #ClimateDiary