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首页> 外文期刊>Estuarine Coastal and Shelf Science >Relevance and magnitude of 'Blue Carbon' storage in mangrove sediments: Carbon accumulation rates vs. stocks, sources vs. sinks
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Relevance and magnitude of 'Blue Carbon' storage in mangrove sediments: Carbon accumulation rates vs. stocks, sources vs. sinks

机译：红树林沉积物中“蓝碳”储存的相关性与大小：碳积累率与股，来源与水槽

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Mangrove ecosystems store large amounts of 'Blue Carbon', in particular in the sediment. Research in the past decade has emphasized the quantitative significance of carbon storage in mangrove forests in climate change mitigation, mainly by determining carbon stocks and calculating potential CO2 emissions caused by mangrove degradation. However, while this approach focuses on the total amount of carbon that can be lost to degradation, it fails to capture the amount that is sequestered annually. Therefore, carbon accumulation in mangrove sediments also needs to be taken into account. This study (i) explains the differences between carbon stocks and carbon accumulation rates (CAR), (ii) it addresses the geographical variation of carbon storage and underlying factors and (iii) it assesses the global relevance of 'Blue Carbon' sequestration in mangrove sediments. Results indicate that reducing uncertainties in carbon storage estimates of individual systems requires a representative set of data that covers within-system variability. An example from Indonesia illustrates that a mangrove ecosystem with a high C stock can have a low CAR and vice versa. It is therefore conceivable that coastal environmental settings with high allochthonous supply of mineral sediment, organic matter and nutrients mostly have low carbon stocks, but high CARs. As these settings represent >80% of the global mangrove area they are most important in terms of long-term carbon storage. While a C stock is a measure of the “vulnerability potential” in the case of ecosystem degradation or total loss, a CAR is rather a measure of the “mitigation potential” of carbon storage in mangrove ecosystems. The global carbon storage in mangrove sediments of 32 Tg yr−1 estimated from CARs in this study is at the upper end of the range of global budgets (14.6–31.1 Tg yr−1, mean 22.9 Tg yr−1). It highlights that the mangrove carbon sink may be larger than previously thought, but the high variation in the global average CAR of 233 ± 280 g C m−2 yr−1 also indicates the need for further data.
机译：红树林生态系统储存大量的“蓝色碳”，特别是在沉积物中。过去十年的研究强调了在气候变化中的红树林中碳储存的定量意义，主要是通过确定碳储存和计算红树质劣化引起的潜在二氧化碳排放。然而，虽然这种方法专注于可能丢失降解的碳总量，但它未能捕获每年隔离的量。因此，也需要考虑红树林沉积物中的碳积累。本研究（i）解释了碳储存和碳积累率（汽车），（ii）的差异，它解决了碳储存和潜在因素的地理变异和（iii）它评估了红树林中“蓝碳”封存的全球相关性沉积物。结果表明，减少各个系统的碳储存估计中的不确定性需要涵盖系统内可变性的代表性数据。来自印度尼西亚的一个例子说明了具有高C库存的红树林生态系统可以具有低车，反之亦然。因此，可以想到，沿海环境环境具有高中的矿物沉积物，有机物质和营养素主要具有低碳股，但高速公路。由于这些设置代表> 80％的全球红树林区，它们在长期碳储存方面最重要。虽然C库存是在生态系统退化或总损失的情况下的“漏洞潜力”的衡量标准，但汽车是红树林生态系统中碳储存“减缓潜力”的衡量标准。红树林沉积物的全球碳储存32 TG YR-1估计的汽车在本研究中估计在全球预算范围的上端（14.6-31.1 TG YR-1，平均22.9 TG YR-1）。它突出显示红树林碳汇可能比以前的思想大，但全球平均汽车的高变化为233±280克C M-2 YR-1也表明需要进一步的数据。

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