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Keywords:

  • diet analysis;
  • diversity;
  • DNA metabarcoding;
  • environmental DNA;
  • food web interactions;
  • next-generation sequencing;
  • statistical modelling

The contributions of environmental DNA to ecology are reviewed, focusing on diet, trophic interactions, species distributions and biodiversity assessment. Environmental DNA has the potential to dramatically improve quantitative studies in these fields. Achieving this, however, will require large investments of time and money into developing the relevant databases, models, and software.