April 23, 2024 Munson, S. M., S. C. Reed, J. Penuelas, N. G. McDowell and O. E. Sala. 2018. Ecosystem thresholds, tipping points, and critical transitions. New Phytologist Trust 218(4):1315-1317. Home » Munson, S. M., S. C. Reed, J. Penuelas, N. G. McDowell and O. E. Sala. 2018. Ecosystem thresholds, tipping points, and critical transitions. New Phytologist Trust 218(4):1315-1317.