Australian tidal wetlands differ in important respects to better studied northern hemisphere systems, an artefact stable to falling sea levels over millennia. A network of Surface Elevation Table-Marker Horizon (SET-MH) monitoring stations has been established across the continent to assess accretionary and elevation responses to sea-level rise. This network currently consists of 289 SET-MH installations across all mainland Australian coastal states and territories. SET-MH installations are mostly in mangrove forests but also cover a range of tidal marsh and supratidal forest ecosystems. Mangroves were found to have higher rates of accretion and elevation gain than all the other categories of tidal wetland, a result attributable to their lower position within the tidal frame (promoting higher rates of accretion) higher biomass (with potentially higher rates of root growth), and lower rates of organic decomposition. While Australian tidal marshes in general show an increase in elevation over time, in 80% of locations, this was lower than the rate of sea-level rise. High rates of accretion did not translate into high rates of elevation gain, because the rate of subsidence in the shallow substrate increased with higher accretion rates (r² = 0.87). The Australian SET-MH network, already in many locations spanning two decades of measurement, provides an important benchmark against which to assess wetland responses to accelerating sea-level rise in the decades ahead.

澳大利亚潮汐湿地在重要方面与经过深入研究的北半球系统不同，北半球系统是数千年来稳定海平面下降的人工产物。整个大陆已经建立了地表高程表-标记地平线（SET-MH）监测站网络，以评估海平面上升的增生和高程响应。该网络目前由遍布澳大利亚大陆所有沿海州和地区的 289 个 SET-MH 装置组成。SET-MH 装置主要位于红树林中，但也覆盖一系列潮汐沼泽和潮上森林生态系统。人们发现红树林比所有其他类型的潮汐湿地具有更高的吸积率和海拔增加率，其结果可归因于它们在潮汐框架内的较低位置（促进更高的吸积率）、更高的生物量（可能具有更高的根生长率）和更低的有机分解率。虽然澳大利亚潮汐沼泽总体上显示出海拔随着时间的推移而增加，但在 80% 的地点，这低于海平面上升的速度。高吸积率并不会转化为高海拔增益，因为浅层基底的沉降率随着吸积率的升高而增加（r ²  = 0.87)。澳大利亚 SET-MH 网络已经在许多地点进行了二十年的测量，为评估未来几十年湿地对海平面加速上升的反应提供了一个重要基准。