Handling Editor: Aaron M. Ellison M., Coleman, D., Eldridge, D. J., Kooyman, R. M., Kotowska, M., Mallen-Cooper, M., Schrader, J., & Watson, I. W. (2026). Ecosystem valuation: Concept, criteria and terminology. Methods in Ecology and Evolution, 00, 1–5. Westoby, https://doi.org/10.1111/2041-210x.70279 1 INTRODUCTION Furlaud et al. (2025) reviewed the concept of ecosystem condition and addressed how it might be quantified via state and transition (ST) concepts or quantitative ST models.