This lesson is still being designed and assembled (Pre-Alpha version)

eDNA: Glossary

Key Points

Metabarcoding Basics
  • Most metabarcoding pipelines include the same basic components

  • Frequency tables are key to metabarcoding analyses

Demultiplexing and Trimming
  • First key point. Brief Answer to questions. (FIXME)

Denoising or clustering the sequences
  • Clustering sequences into OTUs can miss closely related species

  • Denoising sequences can create overestimate diversity when reference databases are incomplete

Taxonomy Assignment
  • The main taxonomy assignment strategies are global alignments, local alignments, and machine learning approaches

  • The main difference is that Naive Bayes requires the reference data to be trained, whereas Sintax looks for only kmer-based matches

Creating A Reference Database
  • First key point. Brief Answer to questions. (FIXME)

Statistics with R: Getting Started
  • Phyloseq has many functions to explore metabarcoding data

  • Results from early lessons must be converted to a matrix

  • Phyloseq is integrated with ggplot to expand graphic output

Statistics and Graphing with R
  • The Phyloseq package has many useful features to conduct statistical analyses of your data

Introduction to Qiime
  • Once you import your results into Qiime, you can run any analysis with that program

  • The OTU fasta file that we created today are equivalent to ‘rep-seqs’ (representative sequences) in Qiime

  • The frequency table we created is called a ‘FeatureTable’ in Qiime parlance

Glossary

FIXME