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Detecting aquatic and terrestrial biodiversity in a tropical estuary using environmental DNA
Polanco F., A.; Mutis Martinezguerra, M.; Marques, V.; Villa-Navarro, F.; Borrero-Pérez, G.H.; Cheutin, M.-C.; Dejean, T.; Hocdé, R.; Juhel, J.-B.; Maire, E.; Manel, S.; Spescha, M.; Valentini, A.; Mouillot, D.; Albouy, C.; Pellissier, L. (2021). Detecting aquatic and terrestrial biodiversity in a tropical estuary using environmental DNA. Biotropica 53(6): 1606-1619. https://dx.doi.org/10.1111/btp.13009
In: Biotropica. Association for Tropical Biology and Conservation: Lawrence, KS, etc.. ISSN 0006-3606; e-ISSN 1744-7429
|  |
| Author keywords |
biodiversity; biomonitoring; Caribbean Sea; Colombia; Don Diego River; environmental DNA; Sierra Nevada de Santa Marta; tropical ecosystem; vertebrate |
| Auteurs | | Top |
- Polanco F., A.
- Mutis Martinezguerra, M.
- Marques, V.
- Villa-Navarro, F.
- Borrero-Pérez, G.H.
- Cheutin, M.-C.
|
- Dejean, T.
- Hocdé, R.
- Juhel, J.-B.
- Maire, E.
- Manel, S.
|
- Spescha, M.
- Valentini, A.
- Mouillot, D.
- Albouy, C.
- Pellissier, L.
|
| Abstract |
Estuaries are characterized by a tidal regime and are strongly influenced by hydrodynamics and host diverse and highly dynamic habitats, from fresh, brackish, or saltwater to terrestrial, whose biodiversity is especially difficult to monitor. Here, we investigated the potential of environmental DNA (eDNA) metabarcoding, with three primer sets targeting different regions of the mitochondrial DNA 12S ribosomal RNA gene, to detect vertebrate diversity in the estuary of the Don Diego River in Colombia. With eDNA, we detected not only aquatic organisms, including fishes, amphibians, and reptiles, but also a large diversity of terrestrial, arboreal, and flying vertebrates, including mammals and birds, living in the estuary surroundings. Further, the eDNA signal remained relatively localized along the watercourse. A transect from the deep outer section of the estuary, across the river mouth toward the inner section of the river, showed marked taxonomic turnover from typical marine to freshwater fishes, while eDNA of terrestrial and arboreal species was mainly found in the inner section of the estuary. Our results indicate that eDNA enables the detection of a large diversity of vertebrates and could become an important tool for biodiversity monitoring in estuaries, where water integrates information across the ecosystem. |
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