East Polynesia (4,365 – 2,638 BCE): Late …

Years: 4365BCE - 2638BCE

East Polynesia (4,365 – 2,638 BCE): Late Neolithic (regional) — Emergent Island Systems and Marine Frontiers

Geographic & Environmental Context

East Polynesia includes the Pitcairn Islands and Easter Island (Rapa Nui). Both mark the far eastern reach of the Polynesian triangle, set apart by vast expanses of open sea.
Anchors: the volcanic massifs and crater lakes of Easter Island (Terevaka, Poike, Rano Kau) and the basalt core and coral terraces of Pitcairn.

Climate & Environmental Shifts

Subtropical to temperate conditions prevailed, moderated by the South Pacific Gyre.
Trade winds remained steady, while occasional southerly air flows introduced cooler and cloudier intervals. ENSO variability was weak, and rainfall patterns stable, allowing gentle soil formation and coastal sediment accretion.

Biota & Baseline Ecology (No Human Presence)

Thin volcanic soils supported sparse ferns, shrubs, and pioneer grasses.
Reef ecosystems flourished around lava benches and submerged platforms, harboring diverse fish and coral assemblages.
Seabird colonies blanketed the cliffs, their guano enriching otherwise nutrient-poor lands, while seasonal seal and turtle populations enhanced coastal productivity.

Long-Term Significance

At the outermost edge of the Pacific, these islands formed a natural frontier of scarcity and resilience.
Their isolation and self-contained ecosystems would later foster distinctive adaptive strategies in agriculture and marine harvesting — the foundations of future Polynesian ingenuity and endurance at the world’s eastern limit.

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