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Biogeochemical particulate and microplastics analysis in Antarctic penguin guano samples, collected 2021-2022
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Scientists found tiny plastic particles—some as small as a grain of sand—in the poop of Antarctic penguins, showing that plastic pollution has reached even one of the most remote places on Earth. Nearly all the samples tested (91%) contained microplastics, mostly tiny fragments from common plastics like those used in packaging and bottles. This matters because it suggests plastic pollution is now widespread enough to infiltrate food chains in pristine environments, and it may even be disrupting how carbon naturally cycles through ecosystems—a process that helps regulate our planet's climate.
This dataset presents the results of the quantification of biogeochemical particulate components (carbon, nitrogen, and biogenic silica) and the identification of microplastics in penguin guano samples collected from Deception and Livingston Islands (South Shetland Islands) during the 2020/2021 and 2021/2022 austral summers. Both species (Chinstrap and Gentoo) showed similar values for natural particulate fractions. Adapted and refined FTIR techniques enabled the detection of the smaller fraction of microplastics up to 25 micrometers in penguin guano for the first time. Microplastics were detected in 91 percent of samples, dominated by small particles (46 percent 25-50 micrometers). Chinstrap guano contained the highest amount of microplastics. Polypropylene was the predominant polymer (34 percent in Chinstrap, 75 percent in Gentoo) followed by Polyethylene (37 percent in Chinstrap, not found in Gentoo). This study provides the first survey of the smallest microplastic fraction (down to 25 micrometers) in penguin guano, offering new insight into how a shift in the partitioning from natural to microplastic particles, previously overlooked, may influence guano-mediated carbon pathways. This research falls under the framework of the Spanish Government project PIMETAN (RTI2018-098048-B-I00) and the UKRI-FLF project CUPIDO (MR/T020962/1). E. Sparaventi was supported by the Spanish predoctoral FPI grant (PRE2019-089679) and a bursary from Antarctic Science Ltd.
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From Carbon to Plastics:Partitioning of Biogeochemicaland Anthropogenic Particles in Penguin Guano
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Scientists studying penguin poop in Antarctica found tiny plastic particles (as small as 25 micrometers — smaller than a grain of salt) in 91% of samples, mostly from common plastics like those used in packaging and bottles. This matters because it shows microplastics have reached even the most remote parts of our planet and may be disrupting how carbon gets absorbed by the ocean, a natural process that helps regulate our climate. While this study focused on penguins rather than direct human health effects, it's a reminder that plastic pollution is now essentially everywhere, including in the food chains and ecosystems we depend on.
From Carbon to Plastics: Partitioning of Biogeochemical and Anthropogenic Particles in Penguin Guano
AI summary Read the abstract
Scientists studying penguin poop in Antarctica found tiny plastic particles (as small as 25 micrometers—thinner than a human hair) in 91% of samples, mostly from plastics used in packaging and textiles. This shows that microplastic pollution has reached even the most remote, seemingly pristine parts of our planet and may already be disrupting how carbon moves through ocean ecosystems. While this study focused on penguins rather than direct human health effects, it's a reminder that plastic waste is cycling through the food chain and environment on a global scale, raising broader questions about our own exposure through the food and water we consume.
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Researchers used penguin fecal samples collected from three species across the Antarctic Peninsula over seven breeding seasons to assess microplastic ingestion in these seabirds. Finding microplastics in Antarctic penguin feces confirms that plastic pollution has reached even remote polar food webs, with krill serving as a potential pathway for transferring microplastics to penguins.
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Scientists testing sediment samples from Antarctica found tiny plastic particles in only about a third of them, suggesting plastic pollution hasn't spread as evenly across this remote continent as some earlier research implied. This matters because it shows that even Earth's most untouched places aren't fully safe from plastic contamination, likely carried there by ocean currents and human activity like tourism and research stations—a reminder that the plastics we use daily can travel far and eventually make their way back into ecosystems (and food chains) that affect us all.
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Microplastic particles were found in the digestive tracts of gentoo penguins sampled from the Antarctic region, adding to evidence that even the remote Southern Ocean ecosystem is contaminated with plastic pollution. The study raises concerns about how microplastic ingestion may affect the health and foraging efficiency of Antarctic seabirds.
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