Blue carbon in human-dominated estuarine and shallow coastal systems.
Blue carbon in human-dominated estuarine and shallow coastal systems.
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DOI：
10.1007/s13280-015-0725-x
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发表时间：
2016-04
期刊：
影响因子：
6.5
通讯作者：
Suzumura M
中科院分区：
文献类型：
--
作者：
Kuwae T;Kanda J;Kubo A;Nakajima F;Ogawa H;Sohma A;Suzumura M
河口和浅海岸系统（ESCS）不仅是重要的有机碳库，也是通过海气CO2气体交换向大气排放CO2的重要场所，这给ESCS在减缓气候变化中的作用提出了难题。然而，一些研究表明，沿海沃茨吸收大气中的二氧化碳，尽管其数量和决定因素尚不清楚。我们认为，在一组给定的陆地输入和地球物理条件下，ESCS的净吸收Catm的现象并不罕见。我们评估了显示净Catm吸收的系统的关键特性，并发现它们通常是人类主导系统的特征：（1）高陆地营养物的输入，（2）经处理的废水的输入，其中不稳定碳被高度去除，以及（3）缺氧的存在。我们建议，人类主导的ESCS是值得调查的气候变化减缓的贡献者。
Estuarine and shallow coastal systems (ESCS) are recognized as not only significant organic carbon reservoirs but also emitters of CO2 to the atmosphere through air–sea CO2 gas exchange, thus posing a dilemma on ESCS’s role in climate change mitigation measures. However, some studies have shown that coastal waters take up atmospheric CO2 (Catm), although the magnitude and determinants remain unclear. We argue that the phenomenon of net uptake of Catm by ESCS is not unusual under a given set of terrestrial inputs and geophysical conditions. We assessed the key properties of systems that show the net Catm uptake and found that they are often characteristic of human-dominated systems: (1) input of high terrestrial nutrients, (2) input of treated wastewater in which labile carbon is highly removed, and (3) presence of hypoxia. We propose that human-dominated ESCS are worthy of investigation as a contributor to climate change mitigation.