Accuracy and Precision of Tidal Wetland Soil Carbon Mapping in the Conterminous United States.
Accuracy and Precision of Tidal Wetland Soil Carbon Mapping in the Conterminous United States.
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DOI：
10.1038/s41598-018-26948-7
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发表时间：
2018-06-21
影响因子：
4.6
通讯作者：
Woodrey M
中科院分区：
文献类型：
--
作者：
Holmquist JR;Windham-Myers L;Bliss N;Crooks S;Morris JT;Megonigal JP;Troxler T;Weller D;Callaway J;Drexler J;Ferner MC;Gonneea ME;Kroeger KD;Schile-Beers L;Woo I;Buffington K;Breithaupt J;Boyd BM;Brown LN;Dix N;Hice L;Horton BP;MacDonald GM;Moyer RP;Reay W;Shaw T;Smith E;Smoak JM;Sommerfield C;Thorne K;Velinsky D;Watson E;Grimes KW;Woodrey M
潮汐湿地产生长期土壤有机碳 (C) 储量。因此，出于碳核算的目的，我们需要有关这些库存的规模和空间分布的准确和精确的信息。我们组装并分析了前所未有的土壤核心数据集，并测试了三种绘制碳储量图的策略：将合成的平均值应用于绘制潮汐湿地图，应用使用经验数据拟合的模型并使用土壤、植被和盐度图，以及依赖独立生成的土壤碳图。与根据现有土壤地图计算的碳储量相比，土壤碳储量平均要低得多，而且在空间和深度上的变化也较小。此外，无法根据气候、盐度、植被或土壤类别很好地预测碳密度的变化。相反，组装的数据集显示，美国本土 (CONUS) 的碳密度呈正态分布，观测值范围可预测。我们确定了最简单的策略，即应用平均碳密度（27.0 kg C m−3）作为最佳执行策略，并保守估计美国本土潮汐湿地土壤的顶层含有 0.72 拍克 C。该策略可以为美国本土潮汐碳核算提供标准化，直到建模和制图进步可以定量提高准确性和精度。
Tidal wetlands produce long-term soil organic carbon (C) stocks. Thus for carbon accounting purposes, we need accurate and precise information on the magnitude and spatial distribution of those stocks. We assembled and analyzed an unprecedented soil core dataset, and tested three strategies for mapping carbon stocks: applying the average value from the synthesis to mapped tidal wetlands, applying models fit using empirical data and applied using soil, vegetation and salinity maps, and relying on independently generated soil carbon maps. Soil carbon stocks were far lower on average and varied less spatially and with depth than stocks calculated from available soils maps. Further, variation in carbon density was not well-predicted based on climate, salinity, vegetation, or soil classes. Instead, the assembled dataset showed that carbon density across the conterminous united states (CONUS) was normally distributed, with a predictable range of observations. We identified the simplest strategy, applying mean carbon density (27.0 kg C m−3), as the best performing strategy, and conservatively estimated that the top meter of CONUS tidal wetland soil contains 0.72 petagrams C. This strategy could provide standardization in CONUS tidal carbon accounting until such a time as modeling and mapping advancements can quantitatively improve accuracy and precision.
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影响因子：
2.9
作者：
Breithaupt, Joshua L.;Smoak, Joseph M.;Sanders, Christian J.
通讯作者：
Sanders, Christian J.
影响因子：
2.8
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Dere, C
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Milan, Charles S.
影响因子：
3.7
作者：
Breithaupt, Joshua L.;Smoak, Joseph M.;Sanders, Christian J.
通讯作者：
Sanders, Christian J.
影响因子：
3.8
作者：
Boyd, Brandon M.;Sommerfield, Christopher K.
通讯作者：
Sommerfield, Christopher K.