Quantification of biodiversity abundance using eDNA 

Workshop November 11, 09:00 – 16:00

Moderated by experienced eDNA researchers, participants will discuss opportunities, challenges and solutions in obtaining trustworthy abundance or biomass data from analysis of aquatic or terrestrial eDNA. A workshop goal is to identify the most promising way forward and formulate specific action points for progress for this field of research and for nature management.
A primary consideration is what is the theoretical basis that links DNA concentrations in environmental substrates to species relative/absolute abundance? For example, the expected correlation between biomass/abundance and DNA concentrations, and which situations depart from these basic assumptions (e.g. reproductive propagules and phenology etc). How does the method (metabarcoding, capture probe, shotgun sequencing) influence the quantitative signal (e.g. capture bias, capture noise, species pipeline biases, pipeline noise)? How do taphonomic issues in preservation or transport of DNA cause bias in the quantitative signal? The focus will be on community relative abundances and individual species abundance from environmental substrates.