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Fish Fare Futilely in Future pH

未来的海水酸度将令鱼儿难以存活

More carbon dioxide emissions lead to more CO2 dissolving in the oceans, which turns the water acidic. Those sour seas slow the growth of corals. And it turns out acidic seawater also makes clownfish and damselfish suicidally bold and reckless, according to a study in the Proceedings of the National Academy of Sciences.

排放出越多的二氧化碳则会导致越多的二氧化碳溶于海洋，加剧海水酸化。酸性海域会阻碍珊瑚的生长繁殖。而根据《美国国家科学院院刊》上的一篇报道，酸性海水还会导致小丑鱼和小热带鱼（小雀鲷）变得胆大妄为，从而自寻死路。

Researchers used IPCC estimates of future CO2 emissions to mix up seawater with varying degrees of acidity, similar to what we might see in 50 to 100 years. Fish larvae raised on the most acidic batch of seawater instinctively avoided predators at first, but soon were actually attracted to the predator's scent - probably due to some impairment of the olfactory system.

联合国政府间气候变化专门委员会对未来的二氧化碳排放量作出了估计，研究人员利用估计结果与不同酸度的海水混合，模拟匹配未来50年至100年间海水的酸度。在酸度最高的一批海水里，仔鱼起初会本能地避开捕食者，但事实上，它们很快就会被捕食者的气味所吸引——这可能是由于它们的嗅觉系统遭到了损害。

When those same fish were placed in experimental reefs near the Great Barrier Reef, they disregarded safety, straying from the protective coral. And cruising predators snatched up nearly all of them within 30 hours. Over the same period, only 10 percent of the fish raised in seawater of today's acidity were eaten.

同样是这些鱼，当把它们放置在大堡礁附近的实验礁水域时，它们便不顾安危，离开了保护性的珊瑚到处乱跑。四处巡游的捕食者在30小时内便将所有的鱼儿捕食殆尽。而同样的30个小时，在现今海水酸度里的鱼儿们仅有10%被捕食。

A disruption as big as climate change is bound to challenge numerous species. This study suggests that some challenges will be as unexpected as a cunning predator.

诸多物种面临着同气候变化一样巨大的毁灭性挑战。这项研究表明，一些挑战将同狡诈的捕食者一样难以预料。

-Christopher Intagliata

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