“With fewer animals to spread seeds, plants could have trouble adapting to climate change”

https://theeagle.com/news/science/with-fewer-animals-to-spread-seeds-plants-could-have-trouble-adapting-to-climate-change/article_3025e75f-8b7f-54c5-92aa-a18bb3363474.html

Picture a mature, broad-branched tree like an oak, maple or fig. How does it reproduce so that its offspring don’t grow up in its shadow, fighting for light?