Ocean microbes are quietly eating plastic waste and oil spills
Jahnavi S, Devendu KV, Saha S, Dey P, Osborne WJ
Bioremediation
The same enzyme-driven breakdown that turns your compost pile into rich soil is happening at sea, where marine microbes use nearly identical chemistry to dismantle plastic bottles and oil residue.
Tiny ocean bacteria and fungi have learned to eat things humans thought were nearly indestructible: plastic bits and spilled oil. They do this by growing into thin films on the trash called a 'plastisphere' and releasing enzymes that slowly chop the pollutants into pieces small enough to absorb as food. Researchers are now using powerful gene-reading tools to identify exactly which microbes and enzymes work best, so cleanup efforts in polluted waters could get faster and more targeted.
Key Findings
Marine microbes use enzymes like PETase and MHETase to break down microplastics, and laccases and peroxidases to degrade hydrocarbons including PAHs and BTEX compounds.
Microplastics act as rafts for oil and other pollutants, creating microbial biofilm communities called the plastisphere.
Degradation happens in stages: surface colonization, enzymatic breakdown, fragmentation, and finally full assimilation and mineralization by the microbes.
chevron_right Technical Summary
Scientists reviewed how ocean-dwelling bacteria and fungi break down plastic waste and oil pollution using specialized enzymes, and how new genetic tools are helping researchers find and improve these pollution-eating microbes faster.
Abstract Preview
Original paper
Marine bacteria and fungi: the hidden treasure of oceans in the biodegradation of microplastics and hydrocarbons integrated with omics technologies.
Marine microorganisms play a crucial role in maintaining oceanic ecosystem stability by mediating essential biogeochemical cycles, nutrient cycling and natural attenuation of environmental pollutan...
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