The recent influx of marine wildlife affected by domoic acid poisoning off the coast of Southern California underscores a critical environmental crisis, with at least 140 sea lions suffering from this debilitating poison and reports of at least 50 stranded dolphins along local beaches. These incidents often necessitate euthanasia due to the high mortality rates associated with this toxin, according to the Marine Mammal Care Centerin San Pedro.
Domoic acid is a potent neurotoxin produced by certain phytoplankton species, which are significant contributors to harmful algal blooms. These toxins accumulate in the tissues of marine mammals and other wildlife consuming contaminated prey. Recent changes in oceanic conditions, potentially intensified by environmental factors such as the Eaton Fire and Palisades Fire, have accelerated the proliferation of these harmful algal blooms.
Wildfires, including the Eaton Fire and Palisades Fire, have significant repercussions on marine ecosystems. The ash and debris from these fires can enter waterways and eventually the ocean, altering nutrient levels and fostering conditions favorable to the growth of harmful algal blooms. The toxic byproducts from these fires can exacerbate ocean warming, further promoting the frequency of these toxic blooms. This can lead to increased production of domoic acid.
When marine animals ingest domoic acid, they endure severe neurological symptoms such as seizures, disorientation, and, ultimately, death. This alarming rise in domoic acid poisoning cases not only threatens individual marine species but also highlights the broader impacts humans have on marine ecosystems.
Domoic acid can also accumulate in shellfish and small fish that feed on the algae, leading to poisoning in larger marine animals and humans who consume contaminated seafood.
Addressing the urgent need to monitor the impact of harmful algal blooms on marine species requires collective strategies. The destructive California wildfires, which have contaminated our oceans and are threatening marine life, serve as a critical call to action for collaborative efforts to protect marine environments and the countless species they support. Recognizing the interconnection of human and marine ecosystems is essential, as the stress in one often affects the other.
If you see a marine mammal in distress, please give them space and call the Marine Mammal Care Center’s Marine Mammal Hotline at 1-800-39-WHALE (94253).
Please consider donating to the Marine Mammal Care Center to help them treat the growing number of sick and injured animals arriving at their facility. Every contribution makes a difference! Donate HERE!
