WHAT THE EVIDENCE SAYS
Using burrowing shrimp Upogebia major, researchers followed DNA in sediments after animals were removed. Under the experimental tank conditions, target DNA persisted for at least 30 and up to 50 days without a clear sustained concentration drop, although values varied by sample position and day.
WHY IT MATTERS / OUR READ
A positive benthic eDNA detection can sometimes mean recent occupancy rather than present occupancy. Survey plans for cryptic burrowers need time-aware sampling, species-specific persistence estimates and independent confirmation when immediate presence matters.
CAVEATS / UNCERTAINTY
A tank is not a tidal flat: sediment disturbance, microbial communities and physical export may differ greatly outdoors. Persistence of this one species' DNA is not a general residence time for every marine taxon.
SOURCE
Frontiers in Marine Science — Kitabatake et al. (2026)
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