Katherine Gallagher is a writer and sustainability expert. She holds a B.A. in English Literature from Chapman University and a Sustainable Tourism certificate from the GSTC. The difference ...

MALCOLM KNAPP RESEARCH FOREST, British Columbia — Suzanne Simard walks into the forest with a churchgoer’s reverence. The soaring canopies of Douglas firs are her cathedral’s ceiling.

The spatial distribution of tree species in species-rich tropical forests is highly complex. The figure shows the spatial position, species identity (color) and size of individual trees in a 500 m ...