Dataset: Increased Organic Carbon Burial in Northern Florida Mangrove-Salt Marsh Transition Zones
Derrick Vaughn
Thomas Bianchi
Michael Shields
William Kenney
Todd Osborne
10.25573/serc.10552004
https://smithsonian.figshare.com/articles/dataset/Dataset_Increased_Organic_Carbon_Burial_in_Northern_Florida_Mangrove-Salt_Marsh_Transition_Zones/10552004
<p>Salt marshes and mangroves are recognized globally as blue
carbon habitats, burying large amounts of carbon with limited area, but they
also are increasingly susceptible to current climate change. Rising
temperatures and decreasing freeze frequencies are resulting in replacement of
salt marshes along the southern United States by mangroves. Our results show
surface soils from wetlands along northern Florida Atlantic and Gulf coasts had
higher apparent sedimentation rates in mangrove-dominated sites (1.5-3.2 mm
yr<sup>-1</sup>) and where mangroves are migrating into the marsh (termed transition
sites, 2.3-3.8 mm yr<sup>-1</sup>). Average carbon burial rates were higher in transition
sites for both coasts (27-47 gC m<sup>-2</sup> yr<sup>-1</sup>) compared to the respective mangrove
(10-22 gC m<sup>-2</sup> yr<sup>-1</sup>) and salt marsh (4-7 gC m<sup>-2</sup> yr<sup>-1</sup>) sites. Lignin biomarker
data (_-6, _-8, C/V) indicated mangrove and transition sites had higher lignin
inputs from woody vascular plants compared to salt marsh sites. Higher amino
acid concentrations in mangrove soils relative to mangrove biomass (1.8-2.3
mmol gC<sup>-1</sup> vs. 0.2-0.9 mmol gC<sup>-1</sup>) and lower C/N indicated these mangrove sites
receive higher algal inputs than the transition and salt marsh sites and we
attribute this difference to greater tidal inundation in the mangrove sites
given their position near the shoreline.</p>
2020-03-02 14:42:16
blue carbon
carbon burial
Florida
Big Bend
salt marsh
mangrove
biomarker
lignin
carbon storage
Carbon Sequestration Science
Soil Science