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Ocean Methane Leak Sparks Rapid 'Worm Bed' Ecosystem
11 Sep
Summary
- Rapid ecosystem response observed near South China Sea methane leak.
- Bacteria and worms formed methane-consuming 'worm beds' within two years.
- Ecosystem service developed much faster than previously thought possible.
In 2018, a gas hydrate exploration incident in the South China Sea resulted in a significant underwater methane leak. Researchers, including those from the University of Bremen, monitored the site from 2018 to 2023 to observe the ecosystem's reaction.
Initially, the seabed was sparsely populated. Following the leak, there was a sharp decline in seafloor life. However, within one to two years, an unprecedented transformation occurred as methane-munching bacteria and invertebrates, particularly polychaete worms, colonized the area.
This quickly established 'worm bed' acted as an animal-microbe biofilter, breaking down methane at a rate comparable to long-standing methane seeps. This rapid development, achieved in a fraction of the 60 to 100 years previously estimated, highlighted a remarkable ecosystem service.
Despite the rapid methane mitigation, the event caused a significant shift in the original ecosystem, with microbial diversity dropping considerably within a 20-meter radius and even further away.
