Putting soil invertebrate diversity on the map.

Ecologists have had a very good foundational knowledge of the global distribution of plants and aboveground animals for many decades. But despite the immense diversity of soil organisms, our knowledge of the global distribution, drivers and threats to soil biodiversity is very limited. In this issue of Molecular Ecology, Bastida et al. (2020) produce the first global maps of soil invertebrate diversity that have been sampled at 83 locations, across six continents, using standardised methods and DNA sequencing. Using data from nematodes, arachnids and rotifers, and structural equation models, they find that diversity of these taxa is primarily driven by vegetation and climate. Given the anthropogenic changes that are occurring, and are projected to continue, this study provides important baseline information for future soil biodiversity and function monitoring, as well as exciting working hypotheses for targeted experiments.