42% of petrel species are threatened and 52% are suffering population declines based on IUCN criteria. These percentages are higher than those of the Clase Aves. According to a global review on the conservation research on petrels and shearwaters, 38 researchers from 34 institutions and 10 countries have recognized light pollution as the second most severe threat for this avian group (measured as number of species affected). The most severe threat identified in this review paper were invasive species at breeding grounds, being rats the most pervasive introduced species. Other identified threats were bycatch, overfishing, climate change, and plastic pollution.
More info at:
Rodríguez A, et al (2019) Future Directions in Conservation Research on Petrels and Shearwaters. Frontiers in Marine Science DOI: 10.3389/fmars.2019.00094
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