Checkley David M, Dickson Andrew G, Takahashi Motomitsu, Radich J Adam, Eisenkolb Nadine, Asch Rebecca
Scripps Institution of Oceanography, University of California, San Diego, CA 92093, USA.
Science. 2009 Jun 26;324(5935):1683. doi: 10.1126/science.1169806.
A large fraction of the carbon dioxide added to the atmosphere by human activity enters the sea, causing ocean acidification. We show that otoliths (aragonite ear bones) of young fish grown under high CO2 (low pH) conditions are larger than normal, contrary to expectation. We hypothesize that CO2 moves freely through the epithelium around the otoliths in young fish, accelerating otolith growth while the local pH is controlled. This is the converse of the effect commonly reported for structural biominerals.
人类活动排放到大气中的大部分二氧化碳进入海洋，导致海洋酸化。我们发现，在高二氧化碳（低pH值）条件下生长的幼鱼的耳石（霰石耳骨）比正常情况下更大，这与预期相反。我们推测，二氧化碳在幼鱼耳石周围的上皮组织中自由移动，在局部pH值得到控制的同时加速耳石生长。这与通常报道的结构生物矿物质的效应相反。
