Soil nutrient content and water level variation drive mangrove forest aboveground biomass in the lagoonal ecosystem of Aldabra Atoll

Lagoonal mangrove ecosystems are vital for carbon capture, protection of coastlines and conservation biodiversity. Yet, they decreasing globally at a higher rate than other ecosystems. In addition to human drivers, local environmental factors influence the functioning lagoonal ecosystems, but their importance combined effects relatively unknown. Here, we investigate drivers functioning, approximated by aboveground biomass (AGB), in protected ecosystem on Aldabra Atoll, Seychelles. Based survey forest structure 54 plots, estimated that mean AGB was 82 ± 13 Mg ha−1. The total area (1720 ha) nearly 140,600 Mg, equivalent about 66,100 stored standing Aldabra. To assess direct indirect soil nutrient content, water level variation salinity AGB, used structural equation model. Our model explained % AGB. content (concentration essential macronutrients column) had greatest variation. Additionally, high (change depth covering location) increased increasing levels. results highlight important contribution Aldabra's Seychelles' storage role hydroperiod as regulator controlling availability crucial nutrients needed mangroves within systems. We suggest managers worldwide focus holistic ecosystem-level perspective successful conservation, including maintenance cycling hydrological processes.