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首页> 外文期刊>Estuarine Coastal and Shelf Science >Comments On: 'underwater Measurements Of Carbon Dioxide Evolution In Marine Plant Communities: A New Method' By J. Silva And R. Santos [estuarine, Coastal And Shelf Science 78(2008) 827-830]
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Comments On: 'underwater Measurements Of Carbon Dioxide Evolution In Marine Plant Communities: A New Method' By J. Silva And R. Santos [estuarine, Coastal And Shelf Science 78(2008) 827-830]

机译：评论：“水下测量海洋植物群落中二氧化碳的排放：一种新方法”，作者：J。Silva和R.Santos [河口，沿海和货架科学78（2008）827-830]

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Silva et al. propose a new method for quantifying benthic net community production (NCP) of tidal flats under submerged condition, based on the monitoring of water pCO_2 in a transparent benthic chamber around high tide. I demonstrate here with theoretical considerations that this method is inappropriate for coastal environments, because it allows only the quantification of the change in the dissolved CO_2 which, at classical seawater pH, is only ~ 10% of the change of the dissolved inorganic carbon (DIC). Total Alkalinity and/or DIC must be measured at the beginning and end of incubations in order to compute NCP in coastal environments. However, I also demonstrate that when pH is below 7, more than 95% of the DIC change occurs in the CO_2 pool. The method proposed by Silva et al. is thus valuable for freshwater environments with acidic, low alkalinity waters, where monitoring the water pCO_2 in a vial or chamber provides alone a very close approximation of the planktonic or benthic net community production.
机译：Silva等。提出了一种新的量化淹没条件下滩涂底栖生物群落生产的新方法，该方法基于监测潮汐周围透明底栖室内水pCO_2的情况。我在这里以理论上的考虑证明该方法不适用于沿海环境，因为它仅允许量化溶解的CO_2的变化，而在经典海水pH值下，该变化仅为溶解的无机碳（DIC）的〜10％ ）。必须在孵化的开始和结束时测量总碱度和/或DIC，以便在沿海环境中计算NCP。但是，我还证明，当pH值低于7时，超过95％的DIC变化发生在CO_2库中。 Silva等人提出的方法。因此，对于带有酸性，低碱度水的淡水环境而言，它是有价值的，在那里监测小瓶或小室中的水pCO_2单独提供非常接近的浮游生物或底栖生物群落生产。

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