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Published (Version of record)CC BY-NC-ND V4.0, Open Access
Published (Version of record)CC BY-NC-ND V4.0, Open
Journal article
Low carbon accumulation in a macro‐tidal mangrove forest on the Amazon coast
Limnology and oceanography, Vol.68(8), pp.1936-1948
08/2023
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Abstract
The important role mangrove forests play in sequestering organic carbon is well known, yet rates of organic carbon accumulation in macro-tidal mangrove ecosystems are poorly resolved. Here we use 210Pb dating to present a 125-yr record of carbon, nutrient and trace metal accumulation in sediments from an Amazon macro-tidal mangrove forest. We find that the rate of organic carbon accumulation ranged from 23.7 to 74.7 g m−2 yr−1 (average 38 ± 13.5 g m−2 yr−1), significantly lower than global averages for mangrove forests. These low rates may be associated with sediment grain-size and sediment–water interface processes that drive organic matter oxidation and reduce carbon stocks in these highly dynamic macro-tidal forests. Total nitrogen accumulation ranged from 1.4 to 5.1 g m−2 yr−1 (average 2.7 ± 0.9 g m−2 yr−1) and phosphorus from 1.5 to 8.4 g m−2 yr−1(average 4.3 ± 1.9 g m−2 yr−1). Trace metal accumulation rates (As, Pb, Cr, Cu, Mn, Ni, Zn, Hg, Bo, V, Co, Mo, S, and Ba) were also lower than other tropical mangrove forests globally, but trace metal in more recent sediments for Mn, As, Cu, and Hg were elevated, likely reflecting human footprint in the region since early the 20th century. The ability to accurately quantify carbon accumulation rates in mangrove ecosystems is critical for climate change mitigation strategies and the implementation of carbon offset schemes globally.
Details
- Title
- Low carbon accumulation in a macro‐tidal mangrove forest on the Amazon coast
- Creators
- Tiago Passos - University of SydneyAngelo F. Bernardino - Universidade Federal do Espírito SantoDan Penny - The University of SydneyRoberto Barcellos - Universidade Federal de PernambucoFrancisco U. Passos - SENAI CIMATEC Technology College (Salvador, Brazil)Gabriel N. Nobrega - Universidade Federal do CearáTiago O. Ferreira - Federal University of Sao PauloJ. Boone Kauffman - Oregon State UniversityChristian J. Sanders - Southern Cross University
- Publication Details
- Limnology and oceanography, Vol.68(8), pp.1936-1948
- Publisher
- Wiley Periodicals LLC
- Grant note
- Australian Research Council. Grant Number: LE140100083 National Geographic Society. Grant Number: NGS-50638R-18
- Identifiers
- 991013127383202368
- Copyright
- © 2023 The Authors. Limnology and Oceanography published by Wiley Periodicals LLC on behalf of Association for the Sciences of Limnology and Oceanography. This is an open access article under the terms of the Creative Commons Attribution-NonCommercial-NoDerivs License.
- Academic Unit
- National Marine Science Centre; Faculty of Science and Engineering
- Language
- English
- Resource Type
- Journal article