A tale of two species: the importance of native ecosystems for long-term conservation on Príncipe Island, Gulf of Guinea

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Abstract

Since it was first described in 1901, the Príncipe thrush Turdus xanthorhynchus has been rare and restricted to the native forest in the south of Príncipe Island. The Obô giant land snail Archachatina bicarinata, however, was widespread across the island and at least locally abundant until the 1990s. Since then its population has collapsed, and now, like the thrush, it is also restricted to the native forest in the south of the island. Using species distribution modelling, we show that both species are currently strongly associated with rugged and remote areas of native forest at high altitudes. We argue that their current distribution might be negatively affected by anthropogenic pressures, as both are harvested, and also because invasive alien species are expected to have deleterious effects on these species, although further studies are needed to clarify interactions between these native and introduced species. The diachronic stories of these species highlight an overlooked value of native ecosystems: their role in the conservation of widespread species that might be unable to use anthropogenic landscapes in the future. They also reinforce the need for protected areas that strive to exclude most human activities in the context of particularly sensitive biodiversity, as is often the case on oceanic islands.

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APA

Rebelo, G. R. V., Soares, F. C., Panisi, M., Dos Santos, Y., Bird, T. L. F., Sinclair, F., … De Lima, R. F. (2024). A tale of two species: the importance of native ecosystems for long-term conservation on Príncipe Island, Gulf of Guinea. ORYX, 58(1), 100–103. https://doi.org/10.1017/S0030605323000364

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