No place to retreat: Heavy extinction and delayed recovery on a Pacific guyot during the Paleocene–Eocene Thermal Maximum

摘要: Modern global change threatens alpine ecosystems by forcing species to migrate higher elevations and potentially eliminating habitat altogether. Here we show that an analogous restriction of suitable operates on submarine mountains. During the Paleocene–Eocene Thermal Maximum (PETM, ca. 55.96 Ma), ostracodes underwent local extinction crest Allison Guyot in central Pacific Ocean, which lost 64% its ostracode richness (14 reduced three species) as much 94% abundance for ∼1.1 m.y., before recolonization rebuilt biodiversity over next 200 k.y. Biotic changes may reflect increase current speeds, acidification, a decrease food supply owing temperature-driven metabolic rates. Notably, continental margin also during PETM (25%–38% loss) but, unlike faunas, could quickly repopulate slope. The absence refugia isolated seamounts prolonged reduction initiated PETM, pattern be expected modern seamount faunas era future change.