Sediment accretion and organic carbon burial relative to sea-level rise and storm events in two mangrove forests in Everglades National Park

Auteur(s) et Affiliation(s)

SMOAK, J.M.

Univ. of South Florida, Environmental Science, Policy and Geography, St. Petersburg, Etats-Unis

BREITHAUPT, J.L.

Univ. of South Florida, Environmental Science, Policy and Geography, St. Petersburg, Etats-Unis

SMITH, T.J.

U.S. Geological Survey, Southeast Ecological Science Center, St. Petersburg, Etats-Unis

SANDERS, C.J.

Univ. Federal de Fluminense (UFF), Dept. de Geoquímica, Niterói, Bresil

Description :
The AA. aimed to examine how sediment accretion and organic carbon (OC) burial rates in mangrove forests respond to climate change. Mass accumulation, accretion and OC burial rates were determined via 210Pb dating (i.e. 100 year time scale) on sediment cores collected from 2 mangrove forest sites within Everglades National Park, Florida (USA). Enhanced rates were found in an upper layer that corresponded to a storm surge deposit. Accretion rates within the storm deposit were compared to overall rates. These rates were found to be matching or exceeding average sea-level rise reported for Key West, Florida. Organic carbon burial rates within the storm deposit were compared to overall burial rates. The overall rates are similar to global estimates for OC burial in marine wetlands. With tropical storms being a frequent occurrence in this region the resulting storm surge deposits are an important mechanism for maintaining both overall accretion and OC burial rates.

Type de document :
Article de périodique

Source :
Catena (Giessen), issn : 0341-8162, 2013, vol. 104, p. 58-66, nombre de pages : 9, Références bibliographiques : 1 p.

Date :
2013

Editeur :
Pays édition : Allemagne, Cremlingen-Destedt, Catena

Langue :
Anglais