HOME HELP FEEDBACK SUBSCRIPTIONS ARCHIVE SEARCH TABLE OF CONTENTS		QUICK SEARCH:   [advanced] Author: Keyword(s): Year:  Vol:  Page:

This Article Figures Only Full Text Free Full Text (PDF) Free Alert me when this article is cited Alert me if a correction is posted Services Similar articles in this journal Similar articles in ISI Web of Science Alert me to new issues of the journal Download to citation manager Citing Articles Citing Articles via HighWire Citing Articles via ISI Web of Science (3) Citing Articles via Google Scholar Google Scholar Articles by Hussein, A. H. Articles by Tucker, M. L. Search for Related Content PubMed Articles by Hussein, A. H. Articles by Tucker, M. L. GeoRef GeoRef Citation Agricola Articles by Hussein, A. H. Articles by Tucker, M. L. Related Collections Global Change Soil Models Pedology Wetland Soils

DIVISION S-10—WETLAND SOILS

Modeling of Carbon Sequestration in Coastal Marsh Soils

^a Wetland Consultant, 24 Marshall Dr., Egg Harbor Township, NJ 08234
^b Dep. of Natural Resource Sciences and L A, Univ. of Maryland, College Park, MD 20742. USDA-FAS, 1400 Independence Ave. SW, Washington, DC 20250

^* Corresponding author (pedon{at}dnamail.com)

Two transects were established across submerging coastal landscapes in Dorchester County, Maryland. Extensive sampling protocol was performed along the submerging upland tidal marsh soils to model C sequestration. Coastal marsh soils are accreting vertically and migrating laterally over the low-lying forest soils to keep pace with sea-level rise. The predictive C sequestration model was a two-step linear function. Therefore, C sequestration will continue to occur by accumulation in the organic horizons and sea-level rise is the driving force. During the last 150 yr, the rate of C sequestration averaged 83.5 ± 23 g m^–2 yr^–1. Before the last few hundred years, the predicted long-term rate of C sequestration averaged 29.2 ± 5.35 g m^–2 yr^–1. Sampling protocol and model validation ascertain the validity of the model and placed 80% confidence and 10% accuracy on rates of C sequestration and the predictive model. The model indicated that coastal marsh soils have higher C storage capacity than upland forest soils, and soils in the Cumulic subgroup of Mollisols. In general, C storage in mineral soils tends to reach a steady-state condition, whereas C sequestration in coastal marsh soils is a continuous phenomenon. During the next century, future C sequestration in the newly formed coastal marsh soils averaged 400 ± 162 g m^–2 yr^–1. Modeling C sequestration in coastal marsh ecosystems indicated that C storage under positive accretionary balance acts as a negative feedback mechanism to global warming.

Abbreviations: MHW, mean high water

This article has been cited by other articles:

				J. L. Jespersen and L. J. Osher Carbon Storage in the Soils of a Mesotidal Gulf of Maine Estuary Soil Sci. Soc. Am. J., March 12, 2007; 71(2): 372 - 379. [Abstract] [Full Text] [PDF]