| Achoimre: | One way to reduce greenhouse gas emissions is to enhance Carbon (C) storage in mangrove sediment. However, environmental pollution hampers the optimal storage function of mangroves. A bio-stimulant named rock dust (RD) aids in remediating mangrove soil by adding nutrients. The effect of rock dust on C storage was analyzed vertically across the soil horizon in the Kennedy Norte Linear Park mangrove in Guayaquil. Four (25 m × 10 m) 250 m2 areas were established, with 1 kg of RD applied every 10 m2. To analyze the impact of RD on C storage, soil samples were collected at three different depths (0 m to 0.1 m / 0.2 m to 0.3 m / 0.4 m to 0.5 m) over 180 days, with sampling intervals of 30 days. A one-way ANOVA analysis was conducted on C in relation to depth, using the Tukey test at p < 0.05. Carbon (C), organic matter (OM), and nitrogen (N) percentages increased in depths 1 and 2 at 90 days after application and remained stable after that. No significant difference in C percentage between depths 1 and 2 was reported. The percentage increase can be attributed to the dry season and RD application. As for pH, it remained within a constant range of values near neutral. NH4 exhibited high ammonification rates. Similar behavior was observed in P and S due to contaminated effluent discharge and higher precipitation.
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