Welcome to the spiderverse, a world measured through webs
Biologists are using spiderwebs as a passive, highly effective tool for collecting environmental DNA (eDNA) to monitor biodiversity. This method allows researchers to identify vertebrate populations more efficiently than traditional sampling techniques.
Why it matters
This innovation provides a low-cost, non-invasive way to track endangered species and detect invasive threats, significantly improving conservation surveillance.
By replicating the stickiness of arachnids’ traps, biologists are unlocking a massively efficient way to measure nature.
Counting the creatures in the world around us is critical for a raft of conservation efforts. It helps scientists gauge biodiversity, track migration, and spot invasive species. That census-taking, though, often requires humans to tabulate what they see, trap, or otherwise sense—a potentially laborious, costly process that can still leave gaps.
But developments over the last decade have revolutionized eco-surveillance. Biologists have tapped into sequencing technology to analyze environmental DNA, or eDNA—genetic material shed by living things. Samples collected from scat, soil, water, and air have opened up a new avenue scientists can use to monitor endangered species and detect invasive ones before anyone can even lay eyes on them.
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