黄河口盐沼湿地沉积物碳储量调查评估

文章依据2021年9月黄河口盐沼湿地沉积物调查数据，分析了沉积物粒度、容重、有机碳分布特征，并对黄河口盐沼湿地沉积物碳密度及碳储量进行评估。结果显示，黄河口盐沼湿地沉积物类型以粉砂为主，部分层次为砂质粉砂和黏土质粉砂；4种植被类型中，不同深度的沉积物容重差异性不大，互花米草和盐地碱蓬分布区容重整体大于柽柳和芦苇分布区；互花米草、盐地碱蓬、芦苇和柽柳分布区沉积物中有机碳含量分别为0.199%、0.200%、0.184%和0.161%,互花米草和盐地碱蓬分布区底质中有机碳含量较芦苇和柽柳分布区偏高，这与互花米草和盐地碱蓬分布区含有更多的黏土组分有关；计算得出，黄河口盐沼湿地沉积物总碳储量为33.47万t,其中互花米草分布区为14.31万t,芦苇分布区为12.05万t,柽柳分布区为5.27万t,盐地碱蓬分布区为1.84万t。

Investigation and Assessment of Sediment Carbon Storage in Salt Marsh Wetland of Yellow River Estuary

Based on data of sediment surveyed in salt marsh wetland of Yellow River Estuary, September, 2021, the distribution characteristics of sediment particle size, bulk density and organic carbon were analyzed, and the carbon density and carbon storage in salt marsh wetland of Yellow River Estuary were evaluated. The results showed that the sediment types were mainly silt, and some layers were sandy silt and clayey silt. There was little difference in the bulk density of sediments at different depths among four types planting cover, and the bulk density of Spartina alterniflora wetlands and Suaeda salsa wetlands were generally greater than that of Tamarix chinensis wetlands and Phragmites australis wetlands. The contents of organic carbon in sediments of Spartina alterniflora, Suaeda salsa, Phragmites australis and Tamarix chinensis area were 0.199%, 0.200%, 0.184% and 0.161% respectively; The contents of organic carbon in sediment of Spartina alterniflora and Suaeda salsa were higher than that of Phragmites australis and Tamarix chinensis area, which was related to more clay components. It was calculated that the total carbon storage of sediment in salt marsh wetland of Yellow River Estuary was 334 700 tons, of which the carbon storage in the sediments of Spartina alterniflora area was 143 100 tons, the Phragmites australis area was 120 500 tons, the Tamarix chinensis area was 52 700 tons, and the area of Suaeda salsa was 18 400 tons.