The effect of bivalve filtration on eDNA-based detection of aquatic organisms

Autoři: Ryan Friebertshauser aff001;  Kurtis Shollenberger aff001;  Alexis Janosik aff002;  Jeffrey T. Garner aff003;  Carol Johnston aff001
Působiště autorů: Department of Fisheries, Aquaculture, and Aquatic Sciences, Auburn University, Auburn, AL, United States of America aff001;  Department of Biology, University of West Florida, Pensacola, FL, United States of America aff002;  Division of Wildlife and Freshwater Fisheries, Alabama Department of Conservation and Natural Resources, Florence, AL, United States of America aff003
Vyšlo v časopise: PLoS ONE 14(11)
Kategorie: Research Article
doi: 10.1371/journal.pone.0222830


As the use of environmental-DNA (eDNA) expands as a method to detect the presence and quantity of aquatic taxa, factors potentially impacting the efficacy of this technique must be investigated. Many studies have examined the effects of abiotic parameters on the degradation of environmental-DNA (e.g. UV radiation, pH, temperature, etc.), however, few have focused on biotic effectors. Through high-filtering rates coupled with dense colonization, Asian clams (Corbicula fluminea) are able to drastically alter the quantity of particulate matter through translocation into the sediment, potentially including sources of eDNA in lotic and lentic systems. Using a longitudinal, laboratory experiment, we tested the effect of varying densities of Asian clams on the translocation rate of common goldfish (Carassius auratus) DNA. Target DNA in testing tanks was quantified through quantitative PCR (qPCR) at regular intervals and compared. Tanks housing the highest density of Asian clams produced significantly lower DNA concentrations over time compared to tanks of lower densities. These results show, for the first time, a density-dependent reduction of local eDNA sources by bivalve filtration that may lead to the obstructed detection of target species through the sampling of eDNA. Based on these findings, we recommend highly concentrated bivalve populations be taken into consideration when choosing the time and locality of eDNA sampling efforts.

Klíčová slova:

Bivalves – DNA extraction – DNA replication – Invasive species – Polymerase chain reaction – Sediment – Water columns – Goldfish


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2019 Číslo 11