New Publication - Refuting the hypothesis of Centinelan extinction at its place of origin

The botanical tale of hyperdiversity and extinction at the Centinela Ridge in western Ecuador was central to shaping our modern concept of Biodiversity Hotspots. But a new study in Nature Plants led by HUH Postdoctoral Fellow Dawson White reveals that some remnant patches of Centinela's forests are still very alive and holding many new and undescribed species. As biodiversity loss accelerates worldwide, the research underscores the critical need for ongoing botanical exploration, collections, and data-driven efforts to understand floristic patterns and rates of extinction in tropical forests.

Abstract: Scientists’ limited understanding of tropical plant communities obscures the true extent of species loss caused by habitat destruction. The Centinelan extinction hypothesis posits an extreme but widely referenced scenario wherein forest clearing causes the immediate extinction of species known only from a single geographic location. It remains unclear, however, whether the disappearance of such microendemics reflects their global extinction or insufficient collection effort at larger scales. Here we test these hypotheses by synthesizing decades of floristic data from the heavily deforested tropical cloud forest (TCF) at Centinela, Ecuador. We find that 99% of its putative microendemics have been collected elsewhere and are not extinct. Our field work also revealed new species, highlighting the enduring conservation value of TCFs and the intense efforts required to illuminate such plant diversity ‘darkspots’. Field and herbarium research remain essential to the conservation action needed to forestall large-scale plant extinctions in Earth’s beleaguered cloud forests.

White, D.M., N.C.A. Pitman, K. Feeley, G. Rivas-Torres, S. Bravo-Sánchez, F. Sánchez-Parrales, J.L. Clark, C. Ulloa Ulloa, X. Cornejo, T.L.P. Couvreur, M. Peñafiel, G. Benavides, C. Bonifaz, J.C. Cerón, A. Fernández, R.P. Fortier, D. Navas-Muñoz, V. Rojas M. J. Nicolás Zapata, J. Williams, J.E. Guevara Andino. 2024. Refuting the hypothesis of Centinelan extinction at its place of origin. Nature Plants. https://doi.org/10.1038/s41477-024-01832-7