DNA metabarcoding for high-throughput monitoring of estuarine macrobenthic communities

Jorge Lobo, Shadi Shokralla, Maria Helena Costa, Mehrdad Hajibabaei, Filipe Oliveira Costa

Research output: Contribution to journalArticlepeer-review

30 Citations (Scopus)

Abstract

Morphology-based profiling of benthic communities has been extensively applied to aquatic ecosystems' health assessment. However, it remains a low-throughput, and sometimes ambiguous, procedure. Despite DNA metabarcoding has been applied to marine benthos, a comprehensive approach providing species-level identifications for estuarine macrobenthos is still lacking. Here we report a combination of experimental and field studies to assess the aptitude of COI metabarcoding to provide robust species-level identifications for high-throughput monitoring of estuarine macrobenthos. To investigate the ability of metabarcoding to detect all species present in bulk DNA extracts, we contrived three phylogenetically diverse communities, and applied four different primer pairs to generate PCR products within the COI barcode region. Between 78-83% of the species in the contrived communities were recovered through HTS. Subsequently, we compared morphology and metabarcoding-based approaches to determine the species composition from four distinct estuarine sites. Our results indicate that species richness would be considerably underestimated if only morphological methods were used: globally 27 species identified through morphology versus 61 detected by metabarcoding. Although further refinement is required to improve efficiency and output of this approach, here we show the great aptitude of COI metabarcoding to provide high quality and auditable species identifications in estuarine macrobenthos monitoring.

Original languageEnglish
Article number15618
JournalScientific Reports
Volume7
Issue number1
DOIs
Publication statusPublished - 1 Dec 2017

Keywords

  • MARINE-BIOTIC-INDEX
  • BENTHIC MACROINVERTEBRATES
  • ECOLOGICAL QUALITY
  • SADO ESTUARY
  • BIODIVERSITY

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