Recruitment foretells collapse
When Pisaster juvenile counts fall below 0.3 per square metre, the urchin barren arrives within eighteen months — regardless of water temperature.
Zonation is not random
Mytilus californianus dominates the upper shelf because it withstands the surf, not because it outcompetes — desiccation tolerance is the true selector.
The anemone remembers
Anthopleura elegantissima colonies track decadal temperature shifts with a fidelity no buoy sensor approaches — their symbiotic algae shift clade by clade.
What quadrats miss
Twenty-three percent of cryptic species remain undocumented in any single-visit survey protocol. The pool withholds until you return at the right tide.