Artículos de revistas
Strong indication of an extinction-based saturation of the flora on the Pacific Robinson Crusoe Islands
Fecha
2018Registro en:
Ecology and Evolution, Volumen 8, Issue 5, 2018, Pages 2527-2533
20457758
10.1002/ece3.3882
Autor
Greimler, Josef
Schulze, Christian H.
López Sepúlveda, Patricio
Novoa, Patricio
Gatica, Alejandro
Reiter, Karl
Wessely, Johannes
Baeza, Carlos
Peñailillo, Patricio
Ruiz, Eduardo
Stuessy, Tod
Institución
Resumen
© 2018 The Authors. Ecology and Evolution published by John Wiley & Sons Ltd. Oceanic islands are vulnerable ecosystems and their flora has been under pressure since the arrival of the first humans. Human activities and both deliberately and inadvertently introduced biota have had and continue to have a severe impact on island endemic plants. The number of alien plants has increased nearly linearly on many islands, perhaps resulting in extinction-based saturation of island floras. Here, we provide evidence for such a scenario in Alejandro Selkirk, Robinson Crusoe Islands (Archipelago Juan Fernández, Chile). We compared species richness and species composition of historical vegetation samples from 1917 with recent ones from 2011. Changes in species’ relative occurrence frequency were related to their taxonomic affiliation, dispersal mode, distribution status, and humidity and temperature preferences. While total species richness of vascular plants remained relatively similar, species co