Abstract Carbon stocks in coastal vegetated ecosystems account for half of the carbon in marine sediments and soils. Disturbance in these ecosystems can release vast amounts of carbon through mineralization, depending on poorly understood factors such as soil organic matter (SOM) quality and environmental factors. The meadows of the seagrass Posidonia oceanica, the species with the larger carbon stocks, are currently under threat. The aim of this study was to determine the impact of cover loss on the SOM and microbial community composition in a P. oceanica meadow. For this purpose, soil cores were taken in dead, degraded and healthy areas in the same meadow. Cores were analyzed for total, inorganic and organic carbon and nitrogen contents, as well as for molecular SOM composition by analytical pyrolysis (

中文翻译：

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海草 Posidonia Oceanica 草甸的覆盖损失加速土壤有机质周转并改变土壤原核群落

摘要 沿海植被生态系统中的碳储量占海洋沉积物和土壤中碳的一半。这些生态系统中的干扰可以通过矿化释放大量碳，这取决于人们对土壤有机质 (SOM) 质量和环境因素等知之甚少的因素。具有较大碳储量的海草 Posidonia Oceanica 的草地目前正受到威胁。本研究的目的是确定覆盖损失对 P. oceanica 草甸中 SOM 和微生物群落组成的影响。为此，在同一草甸的死亡、退化和健康区域采集了土壤核心。通过分析热解分析了岩心的总、无机和有机碳和氮含量，以及分子 SOM 组成（