Mind the GAP: Avian responses to conservation investments in California

California’s 30 x 30 initiative seeks to protect biodiversity by conserving 30% of terrestrial areas and coastal waters by 2030. Land acquisition and management can be costly pathways to achieving the state’s goals. Decision-makers need data-driven evidence on how these efforts compare against other biodiversity strategies, such as public land stewardship. Long-term, consistent sampling is critical for statewide biodiversity assessment; we addressed this using avian observations from Point Blue Conservation Science's Avian Knowledge Network to evaluate biodiversity patterns and target species trends. With USGS Gap Analysis Project and CAL FIRE habitat data, we evaluated biodiversity responses within land conservation areas, accounting for landscape and management complexity. Protected areas were broadly associated with higher avian biodiversity, with variation based on habitat type. Target species followed a similar pattern, with most species showing stable trends within protected areas and diverging trends in unprotected areas. Our results highlight the positive effects of conservation investments, guiding further research into the mechanisms driving habitat specific trends. This analysis will support policy and conservation experts like Point Blue in understanding data gaps and weighing management options to continue to assess California's 30 x 30.
 

Acknowledgements:
Dr. Sam Veloz, Director of EcoInformatics and Climate Solutions, Point Blue Conservation Science
Dr. Naomi Tague, Bren School of Environmental Science & Management
Dr. Carmen Galaz García, Bren School of Environmental Science & Management
Dr. Max Czapanskiy, Bren School of Environmental Science & Management
Point Blue Staff Scientists