酸中的珊瑚

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随着大气二氧化碳的增加,海洋将变得更加酸性。已知海洋吸收大约1/3的二氧化碳,我们投入空气。目前的预测表明海洋的pH将在未来300年内下降1.4。现在请记住,这是在数尺度上,因此海洋的当前pH值为8-8.3,这对应于1/10浓度的氢离子。 1.4滴在6.6-6.9中将pH放在更接近10的氢离子浓度。这是酸度的10x-100倍。

当CO2溶解并与水反应时,它可以从三种化学物质中产生:1)溶解二氧化碳,碳酸(H2CO3),碳酸氢盐(HCO3-)和碳酸盐(CO32-)。该比例取决于温度和碱度。短暂的是,增加的二氧化碳导致碳酸增加,导致珊瑚和蜗牛所需的碳酸酯离子的减少,在其它无脊椎动物中。

最近科学的雷维娅 表明骨架产生珊瑚实际上可以存活这些酸性条件,维持基本寿命功能,包括繁殖。在一个月后的实验中,发生了总骨架溶解。然而,息肉本身伸长,从菌落中解离,并固定到硬质底物上。实际上,息肉生物量增加了与钙化菌落相关的息肉的3倍。 1年后,将孤立息肉转移到钙化和重整菌落的正常条件下。与生物体相比,通过寻求具有有利条件,地理避难所的地理区位,地理避难所存在的生物体,提出珊瑚可以使用生理避难所,在硬形状和软形式之间切换,以存活压力条件。

M.博士 ( 1801篇帖子 )

Craig McClain is the Executive Director of the Lousiana University Marine Consortium. He has conducted deep-sea research for 20 years and published over 50 papers in the area. He has participated in and led dozens of oceanographic expeditions taken him to the Antarctic and the most remote regions of the Pacific and Atlantic. Craig’s research focuses on how energy drives the biology of marine invertebrates from individuals to ecosystems, specifically, seeking to uncover how organisms are adapted to different levels of carbon availability, i.e. food, and how this determines the kinds and number of species in different parts of the oceans. Additionally, Craig is obsessed with the size of things. Sometimes this translated into actually scientific research. Craig’s research has been featured on National Public Radio, Discovery Channel, Fox News, National Geographic and ABC News. In addition to his scientific research, Craig also advocates the need for scientists to connect with the public and is the founder and chief editor of the acclaimed Deep-Sea News (http://jiaxiangsuji.com/), a popular ocean-themed blog that has won numerous awards. His writing has been featured in Cosmos, Science Illustrated, American Scientist, Wired, Mental Floss, and the Open Lab: The Best Science Writing on the Web.