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Low marsh is a tidal marsh zone located below the Mean Highwater Mark (MHM). Based on elevation, frequency of submersion, soil characteristics, vegetation, microbial community, and other metrics, salt marshes can be divided to into three distinct areas: low marsh, middle marsh/high marsh, and the upland zone.[1] Low marsh is characterized as being flooded daily with each high tide, while remaining exposed during low tides.
- ^ Thomas, CR; Christian, RR (2001). "Comparison of nitrogen cycling in salt marsh zones related to sea-level rise". Marine Ecology Progress Series. 221: 1–16. Bibcode:2001MEPS..221....1T. doi:10.3354/meps221001. ISSN 0171-8630.