What is life? MES Cosmology posits that Existence, life, mass, and light originate entirely from pure geometric curvature of the universe, bridging ecology, fundamental physics, life sciences and cosmology. Forest is redefined as a Quantum-Geometric Entity. Forest ecosystems exhibit enigmatic harmonious coexistence phenomena—crown shyness (non-contact canopy spacing) and mycorrhizal networks (fungal-mediated resource sharing)—that defy classical ecological models. We create Quantum-Geometric Ecology as a first-principles framework unifying these phenomena via the Modified Einstein Spherical (MES) Universe Model. We derive a Quantum-Geometric Forest Lagrangian Equation from the MES spacetime curvature-driven action, demonstrating that forest self-organization emerges from spacetime curvature-driven scalar fields ⟶ Crown shyness arises from Cjk-driven photon interference, generating geometric repulsion (∆x ~ 10-3 m); Mycorrhizal networks leverage Zjk entanglement for superluminal nutrient transfer (∆t ~ 10-15 s); Forest biomass scales cosmologically via the Mass Generation Equation mbio∝ϕ0 √(α/(a4 H2 )), can be validated across biomes (R2=0.87). Testable predictions including photon field minima at canopy gaps (∆I/I ~ 10-4) correlated with Cjk phase ϕ(t); quantum coherence in fungal hyphae (τent=1.3±0.2 ms) exceeding classical limits; and nutrient flux bursts synchronized to cosmic phase extrema ϕ(t). Experimental validation employs ⟶ quantum sensors (NV-centers, SQUIDs) for field mapping; cosmic-phase-resolved spectroscopy (ELT-HIRES); and isotopic tracer kinetics under MES-phase windows.