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首页> 外文期刊>Catena: An Interdisciplinary Journal of Soil Science Hydrology-Geomorphology Focusing on Geoecology and Landscape Evolution >Organic carbon burial and sources in soils of coastal mudflat and mangrove ecosystems
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Organic carbon burial and sources in soils of coastal mudflat and mangrove ecosystems

机译：沿海泥滩土壤中有机碳葬葬和源和红树林生态系统

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Mangrove organic carbon is primarily stored in soils, which contain more than two-thirds of total mangrove ecosystem carbon stocks. Despite increasing recognition of the critical role of mangrove ecosystems for climate change mitigation, there is limited understanding of soil organic carbon sequestration mechanisms in undisturbed low-latitude mangroves, specifically on organic carbon burial rates and sources. This study assessed soil organic carbon burial rates, sources and stocks across an undisturbed coastal mudflat and mangrove hydrogeomorphological catena (fringe mangrove and interior mangrove) in Bintuni Bay, West Papua Province, Indonesia. Pb-210 radionuclide sediment dating, and mixing model of natural stable isotope signatures (delta C-13 and delta N-15) and C/N ratio were used to estimate organic carbon burial rates and to quantify proportions of allochthonous (i.e., upland terrestrial forest) and autochthonous (i.e., on-site mangrove forest) organic carbon in the top 50 cm of the soil. Burial rates were in the range of 0.21-1.19 Mg C ha(-1) yr(-1). Compared to the fringe mangroves, organic carbon burial rates in interior mangroves were almost twice as high. Primary productivity of C3 upland forest vegetation and mangroves induced soil organic carbon burial in interior mangroves and this was consistent with the formation of the largest organic carbon stocks (179 +/- 82 Mg C ha(-1)). By contrast, organic carbon stored in the fringe mangrove (68 +/- 11 Mg C ha(-1)) and mudflat (62 +/- 10 Mg C ha(-1)) soils mainly originated from upland forests (allochthonous origin). These findings clearly indicate that carbon sequestered and cycling in mangrove and terrestrial forest ecosystems are closely linked, and at least a part of carbon losses (e.g., erosion) from terrestrial forests is buried in mangrove ecosystems.
机译：红树林有机碳主要储存在土壤中，含有超过三分之二的红树林生态系统碳股。尽管对红树林生态系统对气候变化缓解的关键作用越来越苛刻，但了解对未受干扰的低纬度红树脂的土壤有机碳封存机制有限，特别是有机碳埋藏率和来源。本研究评估了在印度尼西亚的Bintuni海湾的未受干扰的沿海泥滩和美洲红树水文晶体形式的Catena（RECLE WOFOVE和Interior Mangrove）的土壤有机碳葬礼，来源和股票。 PB-210放射性核素沉积物沉积物和自然稳定同位素签名的混合模型（Delta C-13和Delta N-15）和C / N比用于估计有机碳埋管率，并量化表发（即高地陆地的比例）森林）和土壤前50厘米50厘米的自身加热（即现场红树林）有机碳。埋藏率在0.21-1.19 mg c ha（-1）Yr（-1）的范围内。与边缘红树林相比，室内红树林中的有机碳埋藏率几乎是高度的两倍。 C3旱森林植被和美洲树木的初级生产率诱导室内红树林的土壤有机碳埋藏，这与最大的有机碳储量的形成一致（179 +/- 82mg C ha（-1））。相比之下，储存在边缘红树林（68 +/- 11mg C ha（-1））和mudflat（62 +/- 10 mg c ha（-1））土壤中的有机碳，主要来自山地森林（表发来） 。这些研究结果清楚地表明，红树林和陆地森林生态系统中螯合和循环的碳密切相关，并且至少埋在红树林生态系统中的碳损失（例如，侵蚀）的一部分碳损失（例如，侵蚀）。

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