A national?scale dataset for threats impacting Australia’s imperiled flora and fauna

Australia is in the midst of an extinction crisis, having already lost 10% terrestrial mammal fauna since European settlement and with hundreds other species at high risk extinction. The decline nation's biota a result array threatening processes; however, comprehensive taxon-specific understanding threats their relative impacts remains undocumented nationally. Using expert consultation, we compile first complete, validated, consistent threat impact dataset for all nationally listed threatened taxa Australia. We confined our analysis to 1,795 aquatic as (Vulnerable, Endangered, or Critically Endangered) under Australian Commonwealth law. engaged taxonomic experts generate information consistently apply IUCN Threat Classification Scheme Impact Scoring System, well eight broad-level 51 subcategory threats, taxa. This compilation produced 4,877 unique taxon–threat–impact combinations most frequently being Habitat loss, fragmentation, degradation (n = 1,210 taxa), Invasive disease 966 taxa). Yet when only high-impact medium-impact are considered, become prevalent threats. provides critical conservation action planning, national legislation policy, prioritizing investments management recovery.