Long-term changes in contamination and macrobenthic communities adjacent to McMurdo Station, Antarctica
نویسندگان
چکیده
Improved waste management at McMurdo Station, Antarctica beginning in the 1980s has been followed by decreases polycyclic aromatic hydrocarbon (PAH) and metal contamination adjacent marine sediments. However, determining effect of decreased on ecological indicators (macrobenthic fauna) is confounded concurrent changes climate cycles other physical forces. Between 2000 2013, there was a decrease concentrations some contaminants including mercury, copper, organochlorines, PAHs sediments to Station. PAH Winter Quarters Bay an order magnitude from 2000/2003 2012/2013 were within reference area 2013. Macrobenthic communities did not indicate any sign recovery have become more similar over this same period time. Temporal macrobenthic community composition during study had higher correlations with climatic sea ice dynamics than contaminant concentrations. The Interdecadal Pacific Oscillation index highest correlation composition. Antarctic index, maximum extent natural environmental factors also appear influence Despite large improvements continuing vigilance necessary before noticeable improvement systems likely occur. effects must be considered when temporal anthropogenic Antarctica. Maintaining long-term monitoring both important for localized global influences humans Antarctica, which will implications whole planet.
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ژورنال
عنوان ژورنال: Science of The Total Environment
سال: 2021
ISSN: ['0048-9697', '1879-1026']
DOI: https://doi.org/10.1016/j.scitotenv.2020.142798