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# A hotter reef did not consistently reward corals transplanted close to home
- URL: https://intelligence.wildlandseco.com/2026-10-20-coral-transplants-extreme-bleaching-no-home-site-advantage/
- Published: 2026-10-20T13:39:35.000Z
- Updated: 2026-10-20T13:39:35.000Z
- Description: An Orbicella annularis field experiment found extensive bleaching but no reliable overall home-site advantage.
- Author: Benjamin Worlund
- Tags: coral bleaching, restoration, extreme heat, Oceans, Climate, Wildlife, #ecological-intelligence, #brief-2026-10-20, #global-radar, #peer-reviewed, #geo-north-america

Evidence

Peer-reviewed

Geography

St. Thomas, United States Virgin Islands; four reef sites

System

Caribbean coral reef restoration; marine heatwaves

## WHAT THE EVIDENCE SAYS

At four St. Thomas sites researchers followed 128 reciprocally transplanted Orbicella annularis fragments during extreme 2023 marine heating above 20 degree-heating-weeks. Bleaching was widespread. Neither source population nor deployment site showed a consistent overall benefit, and much observed mortality clustered in one array.

## WHY IT MATTERS / OUR READ

Local sourcing can matter, but its value cannot be inferred from a locality label alone. Restoration trials should separate genotype, nursery history, microhabitat and site-specific exposure while recording the distribution of failures.

## CAVEATS / UNCERTAINTY

This was one species in one strong heat event. Mortality patterns were spatially clustered, and small subgroup differences are not proof of a general absence of local adaptation or transplantation effect.

## SOURCE

Frontiers in Marine Science · St. Thomas coral reciprocal transplant  
[View original evidence ↗](https://doi.org/10.3389/fmars.2026.1895022?ref=intelligence.wildlandseco.com)

From the Morning Brief · 2026-10-20

[Read the full Morning Brief →](https://intelligence.wildlandseco.com/morning-brief-2026-10-20/)