El Niño Fuels Marine Bird Crisis in Ecuador and Peru: Dead Birds and Abandoned Nests
El Niño's impact is causing a severe crisis for marine birds along the coasts of Ecuador and Peru, with dead and weakened birds appearing on beaches since mid-June. Experts attribute this to rising sea surface temperatures, a hallmark of El Niño, which reduce marine productivity in the Eastern Tropical Pacific. This warming forces fish populations to migrate to cooler waters, compelling seabirds to travel greater distances for food. Consequently, species like the Inca tern, Peruvian pelican, and Guanay cormorant have been observed far from their usual ranges, while blue-footed boobies, native to Ecuador's coast and the Galapagos, are also heavily affected.
Peruvian beaches are seeing increased numbers of gray petrels, Humboldt penguins, red-footed cormorants, and various gull species. This is not the first El Niño-related avian crisis; in August 2017, 585 dead birds were found on three beaches in Ecuador's Santa Elena province, and between June and September 2023, 576 were collected from a single beach in the same area. While specific numbers for the current season are unavailable, experts fear a prolonged impact as El Niño is expected to continue until January 2027. The situation is particularly concerning for endangered species like the Humboldt penguin and Galapagos penguin, as well as pelicans and albatrosses, especially those with already reduced populations or restricted distributions.
Beyond starvation, weakened birds are susceptible to diseases like avian influenza, which has affected South America previously. Increased travel also exposes them to fishing gear and predators on beaches. The long-term consequences include drastic population declines due to both mortality and reproductive failure. Compounding these issues are other pressures such as climate change, bycatch, invasive species, and unregulated tourism. Authorities in both Ecuador and Peru are urging the public not to handle dead or distressed birds due to potential disease transmission and the need for specialized handling by environmental agencies.
The current El Niño event is exacerbating existing ecological pressures on marine bird populations in Ecuador and Peru, highlighting the vulnerability of species to climate-driven disruptions in food webs. The observed mortality and abandonment of nests underscore the direct link between oceanographic changes and avian survival rates, particularly for species reliant on specific cold-water fish like anchoveta. This situation raises concerns about the long-term resilience of these ecosystems, especially for endangered species already facing threats. The recurring nature of such events, compounded by other anthropogenic stressors like climate change and pollution, suggests a need for proactive conservation strategies that account for increased frequency and intensity of extreme weather phenomena. Future management may require adaptive strategies to mitigate cascading effects on biodiversity and food security, considering the interconnectedness of marine health, fisheries, and avian populations.
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