TIL Clive Barker does things that aren’t horror.

Law and Order Criminal Intent

https://en.m.wikipedia.org/wiki/Nancy_(comic_strip) I think it is Nancy’s friend Sluggo

The tree would drown.
Trees require evaporation through the leaves to draw nutrient enriched water from the roots through the trunk to the leaves. Which then evaporates and causes the process to be continued. They also require Carbon for the photosynthesis process, which trees absorb via the leaves in the form of Carbon Dioxide.