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Annual time-series analysis of aqueous eDNA reveals ecologically relevant dynamics of lake ecosystem biodiversity

Author

Listed:
  • Iliana Bista

    (Molecular Ecology and Fisheries Genetics Laboratory, School of Biological Sciences, Bangor University)

  • Gary R. Carvalho

    (Molecular Ecology and Fisheries Genetics Laboratory, School of Biological Sciences, Bangor University)

  • Kerry Walsh

    (Environment Agency, Horizon House)

  • Mathew Seymour

    (Molecular Ecology and Fisheries Genetics Laboratory, School of Biological Sciences, Bangor University)

  • Mehrdad Hajibabaei

    (University of Guelph)

  • Delphine Lallias

    (GABI, INRA, AgroParisTech, Université Paris-Saclay)

  • Martin Christmas

    (Environment Agency, Horizon House)

  • Simon Creer

    (Molecular Ecology and Fisheries Genetics Laboratory, School of Biological Sciences, Bangor University)

Abstract

The use of environmental DNA (eDNA) in biodiversity assessments offers a step-change in sensitivity, throughput and simultaneous measures of ecosystem diversity and function. There remains, however, a need to examine eDNA persistence in the wild through simultaneous temporal measures of eDNA and biota. Here, we use metabarcoding of two markers of different lengths, derived from an annual time series of aqueous lake eDNA to examine temporal shifts in ecosystem biodiversity and in an ecologically important group of macroinvertebrates (Diptera: Chironomidae). The analyses allow different levels of detection and validation of taxon richness and community composition (β-diversity) through time, with shorter eDNA fragments dominating the eDNA community. Comparisons between eDNA, community DNA, taxonomy and UK species abundance data further show significant relationships between diversity estimates derived across the disparate methodologies. Our results reveal the temporal dynamics of eDNA and validate the utility of eDNA metabarcoding for tracking seasonal diversity at the ecosystem scale.

Suggested Citation

  • Iliana Bista & Gary R. Carvalho & Kerry Walsh & Mathew Seymour & Mehrdad Hajibabaei & Delphine Lallias & Martin Christmas & Simon Creer, 2017. "Annual time-series analysis of aqueous eDNA reveals ecologically relevant dynamics of lake ecosystem biodiversity," Nature Communications, Nature, vol. 8(1), pages 1-11, April.
    • Handle: RePEc:nat:natcom:v:8:y:2017:i:1:d:10.1038_ncomms14087
    DOI: 10.1038/ncomms14087
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