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Campaign Summary Report - Mission Microbiomes from Macapa (2021-09-11) to Belem (2021-09-18) on board AtlantECO flagship SV Tara
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This campaign summary describes an Atlantic research expedition aboard the sailing vessel Tara in 2021 that studied the influence of the Amazon River outflow on Atlantic microbiomes and microplastic distribution. The leg examined both plastic debris and the microbial communities colonizing plastic fragments.
This leg was mainly dedicated to study the effect of the Amazon River over the Atlantic Microbiome. Besides, as rivers act as an important road for plastics getting into the ocean, we also focused on the study of the microplastics and those microbes living the plastic fragments (constituting the plastisphere).
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The Tara Ocean expeditions on plastic pollution
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This paper summarizes findings from the Tara Ocean expeditions focused on plastic pollution, which combined genomic, chemical, and ecological sampling across the Mediterranean and global oceans over more than a decade. The expeditions found microplastics throughout the water column, identified plastic-associated microbial communities, and documented impacts of plastic pollution on marine microbial ecology.
Metabolomic analysis of plastisphere microbial communities in the river-sea continuum
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Researchers performed the first non-targeted metabolomic analysis of plastisphere microbial communities across the river-sea continuum, immersing polyethylene pellets for one month at five sites during the Tara Microplastics expedition to characterize the metabolic activities of microorganisms colonizing plastic waste surfaces.
A Pan-European study of the bacterial plastisphere diversity along river-to-sea continuums
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Researchers conducted a large-scale study of bacterial communities living on microplastic surfaces along river-to-sea pathways in nine major European rivers during the Tara Microplastics mission. They found that microplastics can transport freshwater bacteria into marine environments, representing a potential dispersal mechanism for microorganisms across ecosystems. The study highlights that the plastisphere community composition shifts along the river-sea continuum.
Floating plastics and their associated biota in the Western South Atlantic
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Researchers conducted the first comprehensive survey of floating plastics and their associated organisms in coastal and oceanic waters of southern Brazil. They found an average concentration of about 4,461 plastic items per square kilometer, predominantly microplastics, colonized by diverse communities of bacteria and other organisms including potential pathogens and plastic-degrading microbes.
Microplastics in distal sediments from the mouth of the Amazon River
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Researchers conducted a preliminary assessment of microplastic distribution in distal marine sediments near the mouth of the Amazon River, examining how the Amazon plume — a major source of plastic additives in the tropical North Atlantic — contributes to regional microplastic deposition patterns.
Research digests by email
When a large batch of papers lands in the Atlas, we read through it and send a short write-up of what stood out.