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Article
Elevated rates of organic carbon, nitrogen and phosphorus accumulation in a highly impacted mangrove wetland.
Faculty Publications
  • Christian J. Sanders
  • Bradley D. Eyre
  • Isaac R. Santos
  • Wilson Machado
  • Wanilson Luiz-Silva
  • Joseph M. Smoak
  • Joshua L. Breithaupt
  • Michael E. Ketterer
  • Luciana M. Sanders
  • Humberto Marotta
  • Emmanoel V. Silvo-Filho
SelectedWorks Author Profiles:

Joseph M. Smoak

Document Type
Article
Publication Date
2014
Date Issued
January 2014
Date Available
June 2014
Abstract
The effect of nutrient enrichment on mangrove sediment accretion and carbon accumulation rates is poorly understood. Here we quantify sediment accretion through radionuclide tracers to determine organic carbon (OC), total nitrogen (TN) and total phosphorus (TP) accumulation rates during the previous 60 years in both a nutrient-enriched and a pristine mangrove forest within the same geomorphological region of south-eastern Brazil. The forest receiving high nutrient loads has accumulated OC, TN and TP at rates that are 4, 2 and 8 fold higher than those from the undisturbed mangrove. Organic carbon and TN stable isotopes (δ13C and δ15N) signal an increased presence of organic matter (OM) originating with either phytoplankton, benthic algae or another allochthonous source within the more rapidly-accumulated sediments of the impacted mangrove. This suggests that the accumulation rate of OM in eutrophic mangrove systems may be enhanced through the addition of autochthonous and allochthonous non-mangrove material.
Comments
Abstract only. Full-text article is available only through licensed access provided by the publisher. Published in Geophysical Research Letters, 41(7), 2475-2480. DOI: 10.1002/2014GL059789 Members of the USF System may access the full-text of the article through the authenticated link provided.
Language
en_US
Publisher
American Geophysical Union
Creative Commons License
Creative Commons Attribution-Noncommercial-No Derivative Works 4.0
Citation Information
Sanders, C.J., Eyre, B.D., Santos, I.R., Machado, W., Luiz-Silva, W., Smoak, J.M., Breithaupt, J.L., Ketterer, M.E., Snaders, L., Marcotta, H., & Silva-Filho, E. (2014). Elevated rates of organic carbon, nitrogen and phosphorus accumulation in a highly impacted mangrove wetland. Geophysical Research Letters, 41(7), 2475-2480. DOI: 10.1002/2014GL059789