Effects of increased sea water concentrations of CO2 on growth of the bivalve Mytilus edulis L.
Effects of increased sea water concentrations of CO2 on growth of the bivalve Mytilus edulis L.
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DOI：
10.1016/j.chemosphere.2005.04.111
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发表时间：
2006-01-01
期刊：
影响因子：
8.8
通讯作者：
Oxnevad, S
中科院分区：
文献类型：
--
作者：
Berge, JA;Bjerkeng, B;Oxnevad, S
有人提出，向大气中排放人为二氧化碳将导致海水中二氧化碳浓度增加，相当于pH值降低十分之几个pH单位。研究了海水中CO2浓度升高对贻贝（Mytihisedulis）贝壳生长的影响。实验在水族箱中进行，水族箱连续用掺有CO2的海水冲洗，以提供介于6.7和pH为8.1的对照海水之间的五种不同水平的pH。在44天实验期的开始和结束时测量贻贝的壳长。在实验的前23天内未观察到死亡。以毫米为单位的增长增量是大得多的小贻贝比大贻贝，但相对生长曲线的pH值的函数是更相似的两个大小组，观察到的差异可能是随机变化的样品之间。实验表明，CO2诱导的pH降低影响了M. edulis阴性。在最低pH值下，生长出现强烈的统计学显著性下降，pH = 6.7时几乎无生长，pH = 7.1时生长减少。该效应似乎在pH 7.4和7.1之间;在平均pH 7.4和7.6水平下，生长增量与正常pH 8.1下的生长没有显著差异。(c)2005爱思唯尔有限公司保留所有权利。
It has been proposed that emission of anthropogenic carbon dioxide to the atmosphere will lead to increased concentrations of CO2 in sea water corresponding to a decrease of pH of several tenths of pH units. An experiment was performed to test the effects of increased sea water concent rations of CO2 on shell growth of the blue mussel Mytihis edulis. The experiment was performed in aquaria continuously flushed with sea water spiked with CO2 to provide five different levels of pH between 6.7 and control sea water with a pH of 8.1. The shell length of the mussels was measured at the start and end of the 44 days experimental period. No mortality was observed during the first 23 days of the experiment. The growth increment in mm was much larger for small mussels than for large mussels, but relative growth profile as function of pH was more similar in the two size groups; observed differences may be random variation between samples. The experiments showed that CO2 induced reduction of pH affects the growth of M. edulis negatively. There was a strong and statistically significant decrease in growth at the lowest pH values, with virtually no growth at pH = 6.7 and reduced growth at pH = 7.1. The effect seems to set in between pH 7.4 and 7.1; at mean pH levels 7.4 and 7.6 the growth increments were not significantly different from growth at normal pH 8.1. (c) 2005 Elsevier Ltd. All rights reserved.