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Article
Are global mangrove carbon stocks driven by rainfall?
Journal of Geophysical Research: Biogeosciences
  • Christian J Sanders, Southern Cross University
  • Damien T Maher, Southern Cross University
  • Douglas R Tait, Southern Cross University
  • Darren Williams, Southern Cross University
  • Ceylena Holloway, Southern Cross University
  • James Z Sippo, Southern Cross University
  • Isaac R Santos, Southern Cross University
Document Type
Article
Publication Date
1-1-2016
Abstract

Mangrove forests produce significant amounts of organic carbon and maintain large carbon stocks in tidally inundated, anoxic soils. This work analyzes new and published data from 17 regions spanning a latitudinal gradient from 22°N to 38°S to assess some of the global drivers (temperature, tidal range, latitude, and rainfall) of mangrove carbon stocks. Mangrove forests from the tropics have larger carbon stocks (895 ± 90 t C ha−1) than the subtropics and temperate regions (547 ± 66 t C ha−1). A multiple regression model showed that 86% of the observed variability is associated with annual rainfall, which is the best predictor of mangrove ecosystem carbon stocks. Therefore, a predicted increase in rainfall along the tropical Indo-Pacific may increase mangrove forest carbon stocks. However, there are other potentially important factors that may regulate organic matter diagenesis, such as nutrient availability and pore water salinity. Our predictive model shows that if mangrove deforestation is halted, global mangrove forest carbon stocks could increase by almost 10% by 2115 as a result of increased rainfall in the tropics.

Citation Information

Sanders, CJ, Maher, DT, Tait, DR, Williams, D, Holloway, C, Sippo, JZ & Santos, IR 2016, 'Are global mangrove carbon stocks driven by rainfall?', Journal of Geophysical Research: Biogeosciences, vol. 121, no. 10, pp. 2600-2609.

Published version available from:

http://dx.doi.org/10.1002/2016JG003510