Mangrove reconstruction is an efficient approach for mangrove conservation and restoration. The present study aimed to explore the effects of mangrove reconstruction on sediment properties and bacterial community. The results showed that mangrove restoration greatly promoted sediment fertility, whereas the improvements were more obvious induced by Kandelia obovata when compared to Avicennia marina. In all the samples, the dominant top5 bacterial group were Proteobacteria (48.31–54.52%), Planctomycetes (5.98–8.48%), Bacteroidetes (4.49–11.14%) and Acidobacteria (5.69–8.16%). As for the differences among the groups, the relative abundance of Chloroflexi was higher in the sediments of K. obovata, while Bacteroidetes was more abundant in A. marina group. Furthermore, the two bacterial genera (Rhodoplanes and Novosphingobium) were more dominant in the sediments of K. obovata, while the sediments of A. marina contained higher abundance of Vibrio and Marinobacterium. Besides, bacterial community was highly correlated with mangrove species and sediment property and nutrient status. The results of this study would provide a better understanding of the ecological benefits of mangroves and highlighted the information on biogeochemical processes driven by mangrove restoration and microorganisms.

红树林重建是红树林保护和恢复的有效途径。本研究旨在探讨红树林重建对沉积物特性和细菌群落的影响。结果表明，红树林的恢复大大促进了沉积物的肥力，而与Avicennia marina相比，Kandelia obovata的改善更为明显。在所有的样品中，占主导地位的TOP5细菌组是变形菌门（48.31-54.52％），浮霉菌门（5.98-8.48％），拟杆菌（4.49-11.14％）和酸杆菌门（5.69-8.16％）。至于各组之间的差异，Chloroflexi的相对丰度K 的沉积物中含量较高。obovata，而拟杆菌在A. marina组中更为丰富。此外，这两个细菌属（Rhodoplanes和Novosphingobium）在 K 的沉积物中更占优势。obovata，而A. marina的沉积物中弧菌和海洋杆菌的丰度更高. 此外，细菌群落与红树林物种和沉积物性质和营养状况高度相关。这项研究的结果将有助于更好地了解红树林的生态效益，并突出红树林恢复和微生物驱动的生物地球化学过程的信息。