>>2150221From what I've seen it lines up nearly perfectly with human domestication of grazing animals such as goats and cows.
These animals eat the sapplings of the undergrowth of the forest, in a few hundred years the old trees die after none or little of their sapplings serving, the area becomes a grassland, which becomes a desert.
A forest without regeneration will die. In pic related should be shrubs, sapplings, etc. You shouldn't be able to see for more than a few feet depending on the forest.
>Pic relatedVideos explaining it. They descend in relevancy, the first one is the most important
https://www.youtube.com/watch?v=nAGHUkby2Ishttps://www.youtube.com/watch?v=3VZSJKbzyMchttps://www.youtube.com/watch?v=IDgDWbQtlKI 