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Gulf 'Twilight Zone' Marine Life Plummets Post-Spill
20 Oct
Summary
- Marine animal populations in the Gulf's twilight zone dropped 60%.
- Fish populations declined by 63.5% after the 2010 oil spill.
- Marine life in the affected area has not recovered over 13 years.
A new study reveals a dramatic decline in marine animal populations within the Gulf of Mexico's "twilight zone" after the 2010 Deepwater Horizon oil spill. Researchers found a decrease of about 60% in marine life in the years following the disaster.
Specifically, fish populations dropped by 63.5%, while crustaceans and larger sea creatures like squid and octopuses saw decreases of over 60% and nearly 60%, respectively. These foundational species, crucial for the food web, experienced significant losses.
The study, published in PNAS, highlights that these populations have not shown substantial recovery over the 13 years since the spill. Scientists attribute this decline to the oil spill, having ruled out natural variables like temperature, oxygen, and food supply.
Both the crude oil and the dispersants used in cleanup efforts contributed to the ecological damage. Dispersants, by breaking oil into smaller droplets, increased exposure for deep-water organisms. Experts suggest alternative methods for future spills, like enhancing oil-eating microbes.
Scientists emphasize the interconnectedness of the Gulf's ecosystem, from surface to depth, and express concern over the vast and sustained impact of the spill. The findings underscore the need for caution regarding continued deep-sea drilling and mining activities.
