Plant conservation assessment at scale: Rapid triage of extinction risks

Societal Impact Statement The current rate of global biodiversity loss creates a pressing need to increase efficiency and throughput of extinction risk assessments in plants. We must assess as many plant species as possible, working with imperfect knowledge, to address the habitat loss and extinction threats of the Anthropocene. Using the biodiversity database, Botanical Information and Ecology Network (BIEN), and the Andropogoneae grass tribe as a case study, we demonstrate that large-scale, preliminary conservation assessments can play a fundamental role in accelerating plant conservation pipelines and setting priorities for more in-depth investigations. center dot The International Union for the Conservation of Nature (IUCN) Red List criteria are widely used to determine extinction risks of plant and animal life. Here, we used The Red List's criterion B, Geographic Range Size, to provide preliminary conservation assessments of the members of a large tribe of grasses, the Andropogoneae, with similar to 1100 species, including maize, sorghum, and sugarcane and their wild relatives. center dot We used georeferenced occurrence data from the Botanical Information and Ecology Network (BIEN) and automated individual species assessments using ConR to demonstrate efficacy and accuracy in using time-saving tools for conservation research. We validated our results with those from the IUCN-recommended assessment tool, GeoCAT. center dot We discovered a remarkably large gap in digitized information, with slightly more than 50% of the Andropogoneae lacking sufficient information for assessment. ConR and GeoCAT largely agree on which taxa are of least concern (>90%) or possibly threatened (<10%), highlighting that automating assessments with ConR is a viable strategy for preliminary conservation assessments of large plant groups. Results for crop wild relatives are similar to those for the entire dataset. center dot Increasing digitization and collection needs to be a high priority. Available rapid assessment tools can then be used to identify species that warrant more comprehensive investigation.

Automated summary

The rapid rate of global biodiversity loss necessitates more efficient and thorough extinction risk assessments in plants, even with limited knowledge. This study demonstrates the significance of large-scale preliminary conservation assessments in accelerating plant conservation efforts and prioritizing further investigations, using the Andropogoneae grass tribe as a case study.