EDITORS NOTE: This article is very long, but hugely interesting.
Please go to the link below and have a read at your leisure.

On Vancouver Island, karst researchers hustle to save one of Earth’s most underappreciated—and fragile—ecosystems: an ecosystem hidden in plain sight.
Authored by Bruce Grierson

https://www.hakaimagazine.com/features/the-cavernous-world-under-the-woods/