Marine eDNA Production and Loss Mechanisms

Brasseale, Elizabeth; Adams, Nicolaus; Allan, Elizabeth Andruszkiewicz; Jacobson, Eiren K.; Kelly, Ryan P.; Liu, Owen R.; Moore, Stephanie; Shaffer, Megan; Xiong, Jilian; Parsons, Kim

doi:10.1029/2024JC021643

i

Marine eDNA Production and Loss Mechanisms

2025
By Brasseale, Elizabeth ; Adams, Nicolaus ; Allan, Elizabeth Andruszkiewicz ; ...

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Journal Title:

Journal of Geophysical Research: Oceans
Personal Author:

Brasseale, Elizabeth ; Adams, Nicolaus ; Allan, Elizabeth Andruszkiewicz ; Jacobson, Eiren K. ; Kelly, Ryan P. ; Liu, Owen R. ; Moore, Stephanie ; Shaffer, Megan ; Xiong, Jilian ; Parsons, Kim
NOAA Program & Office:

NMFS (National Marine Fisheries Service) ; NWFSC (Northwest Fisheries Science Center)
Description:

Environmental DNA (eDNA) analysis is a technique for detecting organisms based on genetic material in environments such as air, water, or soil. Observed eDNA concentrations vary in space and time due to biological and environmental processes. Here, we investigate variability in eDNA production and loss by sampling water adjacent to a managed population of non‐native cetaceans on a near‐hourly timescale for 48 hr. We used diverse sampling approaches and modeling methods to describe time variability in observed eDNA concentrations and then compare the magnitude of production and loss mechanisms. We parsed production and loss in a conceptual box model and compared biological and physical loss rates using a decay experiment and a physical transport‐and‐diffusion tracer model. We then evaluated eDNA concentrations along a transect away from the animal enclosure in light of model parameter estimates. We conclude that eDNA production is best conceptualized using a time‐varying mixed‐state model, and biological losses are small relative to physical losses in the marine environment. Because physical loss is unsteady and nonlinear, tracer models are especially helpful tools to estimate it accurately.
Source:

Journal of Geophysical Research: Oceans, 130(4)
DOI:

https://doi.org/10.1029/2024JC021643
ISSN:

2169-9275 ; 2169-9291
Format:

pdf
Publisher:

American Geophysical Union (AGU)
Document Type:

Journal Article
Rights Information:

Other
Compliance:

Submitted
Main Document Checksum:

urn:sha-512:4f29c3f719946730646f8878004977b199533c923ede943825aadcf366b81a16ff522a4004143a09e6c99ddd7494a858fe50767483e9c3084b8a19063bc64290
Download URL:

https://repository.library.noaa.gov/view/noaa/71425/noaa_71425_DS1.pdf
File Type:

[PDF - 1.38 MB ]

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