Abstract Salt marshes are ecologically and globally vital ecosystems. Unfortunately, world-wide salt marsh loss has been extensive, and until recently there has been little effort to undo the loss of ~30,500 ha of salt marshes in Bay of Fundy, Canada, since European colonization. To better understand salt marsh restoration in the upper Bay of Fundy, we monitored sediment deposition and community dynamics in 2 managed realignment salt marsh restoration sites and 2 reference sites from 1 y pre-breach to 8 y post-breach in Aulac, New Brunswick. Because of the initial elevational disparity (~2 m) between site types, substantial amounts of sediment were deposited immediately after breaching the old dike (>50 cm in some locations). After 7–8 y, mean sediment deposition was 34–67 cm in the restoration sites, and 6 cm in a reference site. To date, we identified three stages of vegetative community succession: (i) rapid deposition of unconsolidated sediment and loss of terrestrial vegetation, but Spartina pectinata remained (1 y post-breach), (ii) colonization and spread of S. alterniflora and loss of S. pectinata (2–5 y post), and (iii) high percent cover and decreased spatial variability of S. alterniflora (mean stem density: 345 stems m−2, 6–8+ y post). We expect the fourth stage of vegetative community succession will be defined by spread of S. patens throughout restoration sites. Invertebrate community on emergent marsh and water column community in salt pools were variable and lagged behind vegetative community. Our study reported the first managed realignment in Maritime Canada, and the first such realignment in an ice-influenced and megatidal (~14 m tidal amplitude) region.

中文翻译：

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芬迪湾上游的管理调整：在大潮、受冰影响的环境中盐沼恢复期间的社区动态超过 8 年

摘要 盐沼是生态和全球重要的生态系统。不幸的是，世界范围内的盐沼损失非常广泛，直到最近，自欧洲殖民以来，加拿大芬迪湾约 30,500 公顷盐沼的损失几乎没有得到恢复。为了更好地了解芬迪湾上游的盐沼恢复，我们在新不伦瑞克省 Aulac 监测了 2 个管理调整盐沼恢复点和 2 个参考点的沉积物沉积和群落动态，从破坏前 1 年到破坏后 8 年。由于场地类型之间的初始海拔差异 (~2 m)，大量沉积物在破坏旧堤坝后立即沉积（在某些位置 >50 cm）。7-8 年后，恢复地点的平均沉积物沉积量为 34-67 厘米，参考地点为 6 厘米。迄今为止，我们确定了营养群落演替的三个阶段：(i) 松散沉积物的快速沉积和陆地植被的丧失，但 Spartina pectinata 仍然存在（破坏后 1 年），(ii) S. alterniflora 的定植和扩散以及 S. pectinata (2-5 y post)，和 (iii) 高百分比覆盖和降低 S. alterniflora 的空间变异性（平均茎密度：345 茎 m-2，6-8+ y post）。我们预计植物群落演替的第四阶段将由 S. patens 在整个恢复地点的传播来定义。挺水沼泽地无脊椎动物群落和盐池水柱群落变化多端，落后于植物群落。我们的研究报告了加拿大海上第一次有管理的重新调整，以及在受冰影响的巨潮（~14 m 潮汐振幅）区域中的第一次此类重新调整。