新study finds microplastics in the stomachs of 73 percent of mesopelagic fish caught in the Northwest Atlantic — one of the highest levels globally.
A new study sheds light on the magnitude of microplastic污染在我们的海洋。这项研究，在今天开放获取期刊上发表万博亚洲体育前沿在Marine Science，发现塑料微粒在近三年的肚子出夹在西北大西洋每四个中层鱼 - 全球最高水平之一。这些发现是令人担忧的，因为受影响的鱼可能在海洋中扩散塑料微粒。鱼也是鱼被人类吃掉猎物，这意味着塑料微粒可以间接地通过相关的微型毒素转移污染我们的食品供应。
“微型塑料污染已经在最近的新闻，有几个政府计划在化妆品和洗涤剂中使用微珠的禁令，manbetx 手机客户端说：”Alina Wieczorekfrom the National University of Ireland, Galway and lead author of the study. “The high ingestion rate of microplastics by mesopelagic fish that we observed has important consequences for the health of marineecosystems和生物地球化学循环中的将军“。
Microplastics are small plastic fragments that have accumulated in the marineenvironment接下来的几十年的污染。这些片段可能会导致显著的问题对海洋生物体摄取它们，包括炎症，摄食减少和减肥。微型塑料污染也可以从生物体蔓延到生物体时猎物由天敌吃掉。由于片段可以结合到化学污染物，这些相关的毒素可以在食肉动物积累。
海洋中层的larg鱼作为食物来源e variety of marine animals, including tuna, swordfish, dolphins, seals and sea birds. Typically living at depths of 200-1,000 meters, these fish swim to the surface at night to feed then return to deeper waters during the day. Through these vertical movements, mesopelagic fish play a key role in the cycling of carbon and nutrients from the surface to the deep sea — a process known as biogeochemical cycling. This means they could spread microplastic pollution throughout the marine ecosystem, by carrying microplastics from the surface down to deeper waters, affecting deep-sea organisms.
Despite their important role in marine ecosystems, mesopelagic fish have been relatively understudied in the context of microplastics. To investigate this further, Wieczorek and colleagues set out to catch fish in a remote area of the Northwest Atlantic Ocean: an eddy (whirlpool) off the coast of Newfoundland.
“These fish inhabit a remote area, so theoretically they should be pretty isolated from human influences, such as microplastics. However, as they regularly migrate to the surface, we thought that they may ingest microplastics there,” explains Wieczorek.
该研究组发现的宽在鱼胃塑料微粒的阵列 - 与鱼的高达73％的具有摄取的污染物。“我们记录全球鱼类中塑料微粒的频率最高的一个，”维乔雷克说。“特别是，我们发现了高水平的塑料纤维，例如那些用于纺织品的”。
As the researchers were extremely careful to exclude contamination with fibers from the air, they are confident that the fish had ingested the fibers in the sea. Finding high levels of fibers in the fish is significant, as some studies investigating microplastics in fish have dismissed such fibers as contaminants from the lab environment, meaning their role as a pollutant may have been underestimated.
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