Control of "blue carbon" storage by mangrove ageing: Evidence from a 66-year chronosequence in French Guiana

Global Change Biology
Romain WalckerFrançois Fromard

Abstract

The role of mangroves in the blue carbon stock is critical and requires special focus. Mangroves are carbon-rich forests that are not in steady-state equilibrium at the decadal time scale. Over the last decades, the structure and zonation of mangroves have been largely disturbed by coastal changes and land use conversions. The amount of time since the last disturbance is a key parameter determining forest structure, but it has so far been overlooked in mangrove carbon stock projections. In particular, the carbon sequestration rates among mangrove successional ages after (re)establishment are poorly quantified and not used in large-scale estimations of the blue carbon stock. Here, it is hypothesized that ecosystem age structure significantly modulates mangrove carbon stocks. We analysed a 66-year chronosequence of the aboveground and belowground biomass and soil carbon stock of mangroves in French Guiana, and we found that in the year after forest establishment on newly formed mud banks, the aboveground, belowground and soil carbon stocks averaged 23.56 ± 7.71, 13.04 ± 3.37 and 84.26 ± 64.14 (to a depth of 1 m) Mg C/ha, respectively. The mean annual increment (MAI) in the aboveground and belowground reservoirs was 23.56 × Age-0....Continue Reading

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Citations

Jun 30, 2018·Global Change Biology·Michael J OslandStephen B Hartley
Jan 29, 2020·Ecological Applications : a Publication of the Ecological Society of America·Michael J OslandCamille L Stagg
Mar 28, 2019·Biology Letters·Severino G SalmoHomer M Pagkalinawan
Dec 15, 2020·Carbon Balance and Management·Ziying HeShing Yip Lee
Nov 16, 2020·The Science of the Total Environment·Clint CameronCatherine E Lovelock
Nov 8, 2020·The Science of the Total Environment·Ewan TrégarotPierre Failler
May 22, 2021·The New Phytologist·Marie ArnaudTai Tue Nguyen

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