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Saltwater Intrusion Dramatically Alters Tidal Marsh Carbon Cycling

Recent work from the SALTEx experiment (Seawater Addition Long Term Experiment) demonstrates widespread changes in carbon (C) cycling when a tidal freshwater marsh is exposed to saltwater intrusion. In the paper "Differential effects of chronic and acute simulated seawater intrusion on tidal freshwater marsh carbon cycling" published in Biogeochemistry, Ellen Herbert, Joe Schubauer-berigan, and Chris Craft show that saltwater intrusion leads to reduced C fixation, ecosystem respiration, net ecosystem exchange and methane emissions in chronically dosed "Press" plots. "Pulse" plots - those dosed for two months in fall, by contrast, show little lasting effects of saltwater intrusion on C cycling. This manuscript is the first of a number of forthcoming papers that will come out of the experiment.   

(Contact Chris Craft for additional information)


submitted Mar 27, 2018

LTER
NSF

This material is based upon work supported by the National Science Foundation under grants OCE-9982133, OCE-0620959 and OCE-1237140. Any opinions, findings, conclusions, or recommendations expressed in the material are those of the author(s) and do not necessarily reflect the views of the National Science Foundation.