Barcoding a Food Web: Understanding Diversity and Connections
Author Information
Author(s): Smith M. Alex, Eveleigh Eldon S., McCann Kevin S., Merilo Mark T., McCarthy Peter C., Van Rooyen Kathleen I.
Primary Institution: Biodiversity Institute of Ontario and Department of Integrative Biology, University of Guelph, Guelph, Ontario, Canada
Hypothesis
To what extent would DNA barcoding the spruce budworm food web alter our understanding of its diversity and connectance?
Conclusion
DNA barcoding revealed a 41% increase in the number of species in the spruce budworm food web, but did not significantly alter previous conclusions about its structure.
Supporting Evidence
- Barcoding increased the number of identified species from 110 to 156.
- Connectance of the food web was reduced from 0.03 to 0.02 after barcoding.
- Many previously considered generalist species were revealed to be host-specialists.
Takeaway
Scientists used DNA barcoding to identify more species in a food web, showing that many insects thought to be the same are actually different. This helps us understand how these insects interact.
Methodology
The study involved DNA barcoding over 10% of the insects collected from the spruce budworm food web across three forest plots from 1983 to 1993.
Potential Biases
The selection of specimens for barcoding may have biased the detection towards uncovering generalists rather than specialists.
Limitations
The study's sample sizes for some comparisons were small, which may affect the robustness of the findings.
Participant Demographics
Insects collected from three forest plots in New Brunswick, Canada.
Digital Object Identifier (DOI)
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