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Posted by alistair_seddon on 24 Apr 2014 at 07:35 GMT

Two minor typographical errors have been found in this article. The first sentence in the methods (p2) should read:
"A 4.9 m sediment core was taken in 0.1 m of water".

The last sentence of "Carbon Isotope Ratios" (p2) section should read:
"in general C3 plants, such as mangroves, are isotopically lighter than microbial mats found in alkaline ponds since they preferentially assimilate the lighter isotope 12C from the atmosphere."

Additionally, four minor data handling errors were observed in the stable isotope data where samples were analysed out of sequence incorrectly. These changes make no difference to the overall interpretation of the results/ conclusions. Please contact for corrected versions of Figures 2, 3, 5 and 7.

No competing interests declared.