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POPs in Antarctic ecosystems: is climate change affecting their temporal trends?
Simonetta Corsolini1, Nicoletta Ademollo2
1Department of Physical, Earth and Environmental Sciences, University of Siena, Via P. A. Mattioli, 4, I-53100 Siena, Italy. simonetta.corsolini@unisi.it.
Climate change impacts Antarctic ecosystems, altering persistent organic pollutant (POP) distribution and bioaccumulation in marine life. Research links these changes to ice melt, but POP trends remain uncertain.
Area of Science:
- Environmental Science
- Marine Biology
- Climate Science
Background:
- Antarctica and the Southern Ocean face significant climate change impacts, including ice loss and iceberg calving.
- Global warming influences the distribution of persistent organic pollutants (POPs) due to their physicochemical properties.
- Organisms in Antarctic ecosystems show climate change effects on feeding, reproduction, and POP bioaccumulation.
Purpose of the Study:
- To review literature linking climate change effects with POP bioaccumulation in Antarctic marine species (fish and penguins).
- To explore how climate-driven changes in Antarctica influence contaminant dynamics in resident biota.
Main Methods:
- Literature review of studies on climate change effects and POP bioaccumulation in Antarctic marine species.
- Analysis of reported trends in POP concentrations in relation to environmental changes like ice melt.
Main Results:
- A general decreasing trend for some POPs has been observed in Antarctic biota, despite the region acting as a contaminant sink.
- POP concentrations in biota are linked to ice melting and iceberg calving events.
- Antarctic marine ecosystem characteristics, including pelagic-benthic coupling, may influence POP bioaccumulation.
Conclusions:
- Climate change is demonstrably affecting POP bioaccumulation in Antarctic marine species.
- While some POPs show decreasing trends, the overall status of POP accumulation in Antarctic ecosystems remains an open question.
- Further data is needed for a comprehensive comparison with Arctic biota regarding POP levels and trends.
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