2005/10/01 by Alan Gray, Tara Pelembe, Stedson Stroud · 1 citation
Agricultural and Biological Sciences · Environmental Science · #Biology #Botany, Ecology, and Taxonomy Studies #Critically endangered #Ecology #Endangered species #Extinction (optical mineralogy) #Flora (microbiology) #Geography #Habitat #IUCN Red List #Mediterranean and Iberian flora and fauna #Near-threatened species #Species Distribution and Climate Change #Threatened species
paper · pdf · doi:10.1017/s0030605305001092
openalex publication_date 2005/10/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/04
We present the first assessment of the endemic vascular flora of Ascension Island for over 20 years. Combining new with existing data the following IUCN Red List categorizations are proposed: Anogramma ascensionis, Dryopteris ascensionis, Oldenlandia adscensionis and Sporobolus durus (Extinct); Pteris adscensionis and Euphorbia origanoides (Critically Endangered); Sporobolus caespitosus (Vulnerable); Asplenium ascensionis, Marattia purpurascens and Xiphopteris ascensionensis (Near Threatened). The primary cause of the four presumed extinctions appears to be introductions of exotic species and subsequent alteration of ecological conditions. M. purpurascens, A. ascensionis , and X. ascensionensis appear to be under no immediate threat of extinction, although long-term survival is uncertain. E. origanoides, P. adscensionis , and S. caespitosus require active conservation measures to ensure their survival.