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Carbon Sequestration and Sedimentation in Mangrove Swamps Influenced by Hydrogeomorphic Conditions and Urbanization in Southwest Florida

Title: Carbon Sequestration and Sedimentation in Mangrove Swamps Influenced by Hydrogeomorphic Conditions and Urbanization in Southwest Florida.
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Name(s): Marchio, Daniel, author
Savarese, Michael, author
Bovard, Brian, author
Mitsch, William, author
Type of Resource: text
Genre: Article
Date Issued: 2016-05-30
Language(s): English
Abstract: This study compares carbon sequestration rates along two independent tidal mangrove creeks near Naples Bay in Southwest Florida, USA. One tidal creek is hydrologically disturbed due to upstream land use changes; the other is an undisturbed reference creek. Soil cores were collected in basin, fringe, and riverine hydrogeomorphic settings along each of the two tidal creeks and analyzed for bulk density, total organic carbon profiles, and sediment accretion. Radionuclides 137Cs and 210Pb were used to estimate recent sediment accretion and carbon sequestration rates. Carbon sequestration rates (mean ± standard error) for seven sites in the two tidal creeks on the Naples Bay (98 ± 12 g-C m−2·year−1 (n = 18)) are lower than published global means for mangrove wetlands, but consistent with other estimates from the same region. Mean carbon sequestration rates in the reference riverine setting were highest (162 ± 5 g-C m−2·year−1), followed by rates in the reference fringe and disturbed riverine settings (127 ± 6 and 125 ± 5 g-C m−2·year−1, respectively). The disturbed fringe sequestered 73 ± 10 g-C m−2·year−1, while rates within the basin settings were 50 ± 4 g-C m−2·year−1 and 47 ± 4 g-C m−2·year−1 for the reference and disturbed creeks, respectively. These data support our hypothesis that mangroves along a hydrologically disturbed tidal creek sequestered less carbon than did mangroves along an adjacent undisturbed reference creek.
Identifier: 10.3390/f7060116 (doi), fgcu_ir_000086 (IID), http://www.mdpi.com/1999-4907/7/6/116 (uri)
Subject(s): carbon sequestration
sediment accretion
mangrove wetlands
coastal geomorphology
blue carbon
Rhizophora mangle
sea level rise
Persistent Link to This Record: http://purl.flvc.org/fgcu/flvc_fgcu_islandoraimporter_10.3390_f7060116_1523039351
Use and Reproduction: publisher
Owner Institution: FGCU
Is Part Of: Forests.
1999-4907