Fritt-Rasmussen Janne, Linnebjerg Jannie Fries, Nordam Tor, Rigét Frank F, Kristensen Paneeraq, Skancke Jørgen, Wegeberg Susse, Mosbech Anders, Gustavson Kim
Danish Centre for Environment and Energy, Department of Ecoscience, Aarhus University, Frederiksborgvej 399, DK-4000 Roskilde, Denmark.
Danish Centre for Environment and Energy, Department of Ecoscience, Aarhus University, Frederiksborgvej 399, DK-4000 Roskilde, Denmark.
Mar Pollut Bull. 2023 Mar;188:114659. doi: 10.1016/j.marpolbul.2023.114659. Epub 2023 Feb 2.
Chemical dispersion is an oil spill response strategy where dispersants are sprayed onto the oil slick to enhance oil dispersion into the water. However, accidental application could expose seabirds to dispersants, thereby negatively affecting their plumage. To understand the possible impacts on seabirds, feathers from common eider (Somateria mollissima) and thick-billed murre (Uria lomvia) were exposed to different dosages of the dispersant Dasic Slickgone NS. For all exposure dosages the feathers increased in weight, and mostly for common eider. Analysing the feather microstructure, e.g., the Amalgamation Index, showed that larger damages were found on thick-billed murre than common eider. A no-sinking limit was established at 0.109 ml/m. Relating this value to desktop simulations of potential sea-surface dosages in real-life situations, and to published accounts of response operations, showed that the limit is likely to be exceeded. Thus, our results show that chemical dispersants in realistic dosages could impact seabirds.
化学分散是一种应对溢油事故的策略，即向浮油喷洒分散剂，以促进油在水中的分散。然而，意外使用可能会使海鸟接触到分散剂，从而对它们的羽毛产生负面影响。为了解对海鸟可能产生的影响，将普通绒鸭（Somateria mollissima）和厚嘴海鸦（Uria lomvia）的羽毛暴露于不同剂量的分散剂Dasic Slickgone NS中。对于所有暴露剂量，羽毛重量均增加，普通绒鸭的情况尤为明显。分析羽毛微观结构，如融合指数，结果显示厚嘴海鸦的损伤比普通绒鸭更严重。确定了不沉没极限为0.109毫升/米。将该值与实际情况中潜在海面剂量的桌面模拟以及已发表的应对行动记录相关联后发现，该极限可能会被突破。因此，我们的结果表明，实际剂量的化学分散剂可能会对海鸟产生影响。
