This study examines mangrove substrate production within a mangrove basin forest in the Tweed Estuary, northern New South Wales, Australia. This is achieved using high resolution dating of ^239+240Pu, ²³⁶U and ²¹⁰Pb in mangrove sediments to examine both the modes and rates of mangrove substrate production. Results show a shift in the mode of substrate production occurred approximately 70 years ago in response to human modification of the Tweed Estuary (hydrologic changes). At that time, mangrove substrate production shifted from being dominated by sedimentation processes (fine silt accumulation) to being dominated by biological processes (mangrove root production). Since that time, mangrove peat has been accreting at the study site at the same rate as local sea level rise (SLR), implying current rates of peat substrate development are tuned to increasing sea level. A further implication of the shift to biological accretion at rates corresponding with SLR is that the studied mangrove basin is sequestering C at increasing rates due to subsurface root production.

这项研究调查了澳大利亚新南威尔士州北部特威德河口的红树林流域森林中的红树林底物生产。这是使用^{239 + 240} Pu，²³⁶ U和^210的高分辨率测年实现的红树林沉积物中的铅可检查红树林底物生产的方式和速率。结果表明，响应人类对特威德河口的改造（水文学变化），基质生产方式发生了变化，大约在70年前。那时，红树林基质的生产已从以沉积过程为主（细粉质堆积）转变为以生物过程为主（红树林根系生产）。从那时起，红树林泥炭一直以与当地海平面上升（SLR）相同的速率在研究地点生长，这意味着当前泥炭基质发育速率已调整为增加的海平面。