RT Journal Article
T1 Iron’s role in soil organic carbon (de)stabilization in mangroves under land use change
A1 Ruiz, Francisco
A1 Fraga Bernardino, Angelo
A1 Melo Queiroz, Hermano
A1 Otero Pérez, Xosé Lois
A1 Rumpel, Cornelia
A1 Osório Ferreira, Tiago
AB Mangroves are coastal hotspots for carbon storage and yet face multiple threats from anthropogenic activities. Here we explore the role of iron-mediated organomineral interactions (FeOMIs) in soil organic carbon (SOC) stabilization and their sensitivity to land use change (LUC) in Amazonian mangroves. We show that Fe oxides protect more labile SOC fractions, which would otherwise be vulnerable to biological degradation, with poorly crystalline Fe oxides being the most effective phase for SOC retention. Despite the fragile equilibrium of FeOMI under dynamic redox conditions in mangroves, this balance sustains approximately 8% of total SOC. The studied LUC scenario led to massive loss of FeOMIs as less crystalline phases were either degraded or transformed into more crystalline ones, losing the efficiency in retaining SOC. The conversion of mangroves to pastures and shrimp ponds, which are pervasive globally, triggers important biogeochemical changes, with major implications for the carbon sequestration potential of mangrove soils.
PB Nature Publishing Group
YR 2024
FD 2024-11-30
LK https://hdl.handle.net/10347/39350
UL https://hdl.handle.net/10347/39350
LA eng
DS Minerva
RD 28 abr 2026