Using patterns in prey DNA digestion rates to quantify predator diets

Stella Uiterwaal & John DeLong
Dietary metabarcoding – the process of taxonomic identification of food species from DNA in consumer guts or feces – has been rapidly adopted by ecologists to gain insights into biocontrol, invasive species, and the structure of food webs. However, an outstanding issue with metabarcoding is the semi-quantitative nature of the data it provides: because metabarcoding is likely to produce false positives for some prey more often than for other prey, we cannot infer relative frequencies...
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