Universidad Peruana Cayetano Heredia

Carbon and nutrient accumulation in mangrove sediments affected by multiple environmental changes

Mostrar el registro sencillo del ítem

dc.contributor.author Perez Segovia, Alexander
dc.contributor.author Machado, W.
dc.contributor.author Gutierrez Aguilar, Dimitri Alexey
dc.contributor.author Smoak, J.M.
dc.contributor.author Breithaupt, J.L.
dc.contributor.author Saldarriaga, M.S.
dc.contributor.author Sanders, L.
dc.contributor.author Marotta, H.
dc.contributor.author Sanders, C.J.
dc.date.accessioned 2020-12-14T16:10:04Z
dc.date.available 2020-12-14T16:10:04Z
dc.date.issued 2020
dc.identifier.uri https://hdl.handle.net/20.500.12866/8763
dc.description.abstract Purpose: In order to assess the impact of anthropogenic activities on carbon and nutrient accumulation, total organic carbon (TOC), nitrogen (TN), and phosphorus (TP) accumulation rates were examined in a 210Pb-dated mangrove sediment core from Sepetiba Bay, Brazil, a coastal region impacted by multiple environmental changes during the previous century. Materials and methods: A 50-cm length sediment core was collected from a mangrove forest in Sepetiba Bay. Sediment subsamples were analyzed to measure TOC, TN, δ13C, and δ15N using an elemental analyzer attached to an isotope ratio mass spectrometer Thermo Finnigan Model Delta Plus XP, whereas colorimetric analysis were used to measure TP. For 210Pbex analyses, gamma-ray measurements were performed in a semiplanar intrinsic germanium high purity coaxial detector, coupled to a multichannel analyzer, whereas the sediment accumulation rate (SAR) was calculated according to the constant initial concentration (CIC) method. Also, carbon and nutrient fluxes were calculated using SAR and TOC, TN, and TP contents, whereas statistical differences were evaluated by ANOVA + Tukey HSD analysis with previous data normalization. Results and discussion: The calculated sedimentation rate (~ 8.1 mm year−1) since the early 1900s was up to threefold higher than the global mean determined for mangrove forests (~ 2.8 mm year−1) and the regional sea level rise (~ 3.2 mm year−1). Significantly higher TOC, TN, and TP fluxes, up to nearly 1000, 90, and 15 g m−2 year−1, respectively, were observed after the water diversion from a nearby drainage basin in the 1950s and an increase in sewage effluent input, which increased in the early 1990s. After this period, lighter δ13C values (~ − 25‰) indicate an increased importance of the terrestrial organic matter source, while lower TOC:TN ratios (~ 11) and heavier δ15N values (~ + 9‰) suggest an increased influence of anthropogenic fertilization on inorganic nitrogen accumulation. Conclusions: The significantly higher accumulation rates during the last decades evidenced the role of mangrove sediments as sinks for anthropogenically enhanced inputs of carbon and nutrients. Also, studies on carbon and nutrient accumulation evidenced the need for further research in eutrophic coastal areas. en_US
dc.language.iso eng
dc.publisher Springer
dc.relation.ispartofseries Journal of Soils and sediments
dc.rights info:eu-repo/semantics/restrictedAccess
dc.rights.uri https://creativecommons.org/licenses/by-nc-nd/4.0/deed.es
dc.subject Carbon accumulation en_US
dc.subject Eutrophication en_US
dc.subject Mangroves en_US
dc.subject Organic matter source en_US
dc.subject Sea level rise en_US
dc.title Carbon and nutrient accumulation in mangrove sediments affected by multiple environmental changes en_US
dc.type info:eu-repo/semantics/article
dc.identifier.doi https://doi.org/10.1007/s11368-020-02612-4
dc.subject.ocde https://purl.org/pe-repo/ocde/ford#1.05.06
dc.relation.issn 1614-7480


Ficheros en el ítem

Ficheros Tamaño Formato Ver

No hay ficheros asociados a este ítem.

Este ítem aparece en la(s) siguiente(s) colección(ones)

Mostrar el registro sencillo del ítem

info:eu-repo/semantics/restrictedAccess Excepto si se señala otra cosa, la licencia del ítem se describe como info:eu-repo/semantics/restrictedAccess

Buscar en el Repositorio


Listar

Panel de Control

Estadísticas