The Ocean Void: Coastal Dead Zones as Oceanic Fisher Runaway, Coral Bleaching Cascades as Thermal D3, and the Abyssal Constraint Pole — Marine Pe Gradient as Cross-Regime Framework Validation

Applies the Void Framework to marine ecosystems, demonstrating Pe gradient validation across three regimes: coastal eutrophication dead zones as oceanic Fisher Runaway (Pe→∞ as α_buffering→0), coral bleaching cascades as thermal D3 (Pe rising from ~3 to ~12 as thermal tolerance buffer declines), and abyssal plains as constraint poles (O=3, Pe≈0 — the most opaque environment on Earth shows zero drift cascade because R×C≈0). The Mnemiopsis leidyi Black Sea invasion provides the framework's clearest natural experiment: α injection via Beroe ovata introduction (1997) produced documented Pe reduction and partial fishery recovery. Spearman ρ between Pe_ocean and species richness decline across 8 marine systems validates the multiplicative Pe structure at planetary scale.