Study on microbial community responses and dissolved organic matter (DOM) transformations in coastal surface seawater amended with sedimentary DOM in Xiamen

海洋沉积物是海水溶解有机质（Dissolvedorganicmatters，DOM）的重要来源。DOM作为海洋异养微生物生存的主要物质和能量来源，影响着微生物群落的结构，而微生物群落也同时影响着DOM的化学组成和最终命运。近年来，海洋沉积物DOM成为海洋生物地球化学领域的热点研究对象，但其生物可利用性一直存在争议，且沉积物DOM释放到上层水体后将如何影响微生物群落的结构也不清晰。为了研究沉积物DOM的生物可利用性，以及沉积物DOM与上层海水微生物群落之间的相互关系，本论文采集了厦门近岸沉积物表层DOM，添加至上层自然海水中，开展了长时间培养实验。通过高通量测序方法监测微生物群落组成动态变化，运...Marine sediments are an important source of dissolved organic matters (DOM) that are the main substrate and energy source for hetertrophic bacterioplankton in the seawater column. Thus, sediment DOM are an important component of marine carbon cycles. However, studies on bacterial communities associated with sediment DOM bioavailability remain fragmentary. In the present study, a sediment sample wa...学位：理学硕士院系专业：环境与生态学院_环境科学学号：3332013115174