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Short-term indicators of seagrass transplant stress in response to sediment bacterial community disruption

机译：响应沉积物细菌群落破坏的海草移植压力的短期指标

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Bacterial communities in sediments engage in activities that determine the pathways and rates of organic matter remineralization. Changes in bacterial community composition might result in greater restoration success if interactions among seagrasses, sediment, and bacterial communities were elucidated. A manipulative experiment that disrupted the sediment bacterial community examined the response of Thalassia testudinum transplants. Planting units were transported to a suitable location and replanted with either autoclaved, transplant, or donor site sediments. Sediments from the rhizosphere were subsampled for analysis of the 16S rDNA gene. The autoclave treatment group had significantly lower bacterial diversity than the other treatments, as measured with terminal restriction fragment length polymorphism. Significantly higher mortality of the transplants was observed in the autoclave treatment group, while mortality in the donor and transplant treatment groups was low relative to the control group. Rhizosphere disruption through the removal of surrounding sediments did not increase mortality, while manipulating the composition of the bacterial community increased mortality in transplants. A native bacterial community was a critical component for minimizing short-term stress associated with a seagrass transplant, which suggests a tighter coupling between seagrasses and sediment bacterial communities than previously thought.
机译：沉积物中的细菌群落参与确定有机物再矿化的途径和速率的活动。如果阐明了海草，沉积物和细菌群落之间的相互作用，细菌群落组成的变化可能会导致更大的修复成功。破坏沉积物细菌群落的操纵性实验检查了地中海蛇睾丸移植物的反应。将播种单位运输到合适的位置，并用高压灭菌，移植或施主部位的沉积物补种。对根际的沉积物进行二次采样以分析16S rDNA基因。用末端限制性片段长度多态性测量，高压灭菌处理组的细菌多样性明显低于其他处理。在高压灭菌器治疗组中观察到移植物的死亡率明显更高，而在供体和移植物治疗组中的死亡率相对于对照组而言较低。通过去除周围的沉积物破坏根际不会增加死亡率，而操纵细菌群落的组成会增加移植的死亡率。原生细菌群落是最大程度地减少与海草移植相关的短期压力的关键组成部分，这表明海藻与沉积物细菌群落之间的耦合比以前想象的要紧密。

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