Food for Thought: Advances and limitations of aquatic ecosystem monitoring with environmental DNA
Environmental DNA (eDNA) has emerged as a powerful tool for the detection of rare or invasive species and the characterization of changes occurring in ecological communities. By applying massively parallel DNA sequencing analysis on freshly collected water samples, we can now rapidly establish the presence and abundance of organisms across the tree of life, an impossible feat using costly and time-consuming visual surveys. Yet the breakneck speed at which this field has moved has left some understandably cautious about the ‘silver-bullet-ness’ of eDNA-based biomonitoring.