Title

Elevated rates of organic carbon, nitrogen and phosphorus accumulation in a highly impacted mangrove wetland.

SelectedWorks Author Profiles:

Joseph M. Smoak

Document Type

Article

Publication Date

2014

Date Issued

January 2014

Date Available

June 2014

ISSN

1944-8007

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 License
This work is licensed under a Creative Commons Attribution-Noncommercial-No Derivative Works 4.0 License.