Carbon Sequestration and Sediment Accretion in San Francisco Bay Tidal Wetlands

Recent Rates of Carbon Accumulation in Montane Fens of Yosemite National Park, California, U.S.A.

“…Specifically, the rates of carbon sequestration measured here in the natural marshes (Quilceda Marsh and Otter Island, 110.2 and 173.1 g C m -2 yr -1 respectively) are within the range of values measured at other salt and brackish marshes in the United States (see Callaway et al, 2012). The 352.1 g C m -2 yr -1 measured at the restored North Ebey site greatly exceeds even the global mean of 220 g C m -2 yr -1 for tidal saline wetlands reported by Chmura et al (2003), which was later revised to 115 C m -2 yr -1 (Morris et al, 2012).…”

Relationships Between Salinity and Short-Term Soil Carbon Accumulation Rates from Marsh Types Across a Landscape in the Mississippi River Delta

“…Therefore, better understanding of how these environmental conditions influence carbon accumulation rates in various coastal wetland types is needed to predict how climate change through sea-level rise and future coastal restoration actions will influence the carbon accumulation rates (Markewich et al 2007;Couvillion et al 2013). In addition, these results may help support wetland restoration and management activities for carbon storage/burial capabilities and carbon credits (McLeod et al 2011;Callaway et al 2012;Hansen and Nestlerode 2014).…”

Carbon Stocks and Accumulation Rates in Salt Marshes of the Pacific Coast of Canada

“…Marker horizons can also be subjected to the same post-depositional soil turbation. Specifically, dating methods using 137 Cs have been shown to produce slightly -but not significantly-higher CAR estimates in salt marsh CAR estimates, with CAR calculated with 210 Pb an average 15 of 26 % lower (SAR 29 % lower) than the same sites dated using 137 Cs (Callaway et al 2012). …”

“…Second, while our one low marsh core exhibits anomalously low CAR relative to the high cores in which CAR was estimated, the single core does not possess sufficient statistical power to draw conclusions about differences between average low and high marsh CAR in Clayoquot Sound because of regional heterogeneity SAR and CAR within and between marshes. Previous studies of marsh accretion dynamics have 5 demonstrated variability in SAR on scales as small as one meter due to such influences as recent ecological disturbance (Webb et al 2013), water table height and soil drainage (Craft 2007), and variable mineral sediment deposition from freshwater drainage (Callaway et al 2012). In our case, a power analysis suggests that at least nine cores measured for CAR would be required to confidently compare the means of low marsh and high marsh cores.…”