At Palmyra Atoll, the fish-community environmental DNA signal changes across habitats but not with tides.

: At Palmyra Atoll, the eDNA signal on tidal sand flats was associated with fish biomass density and captured 98-100% of the expected species diversity there. Although eDNA spilled-over across habitats, species associated with reef habitat contributed more eDNA to reef sites than to sand-flat sites, and species associated with sand-flat habitat contributed more eDNA to sand-flat sites than to reef sites. Tides did not disrupt the sand-flat habitat signal. At least 25 samples gives a coverage > 97.5% at this diverse, tropical, marine system. This article is protected by copyright. All rights reserved.