1. Soil carbon in the world's tidal marshes.
- Author
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Maxwell TL, Spalding MD, Friess DA, Murray NJ, Rogers K, Rovai AS, Smart LS, Weilguny L, Adame MF, Adams JB, Austin WEN, Copertino MS, Cott GM, Duarte de Paula Costa M, Holmquist JR, Ladd CJT, Lovelock CE, Ludwig M, Moritsch MM, Navarro A, Raw JL, Ruiz-Fernández AC, Serrano O, Smeaton C, Van de Broek M, Windham-Myers L, Landis E, and Worthington TA
- Abstract
Tidal marshes are threatened coastal ecosystems known for their capacity to store large amounts of carbon in their water-logged soils. Accurate quantification and mapping of global tidal marshes soil organic carbon (SOC) stocks is of considerable value to conservation efforts. Here, we used training data from 3710 unique locations, landscape-level environmental drivers and a global tidal marsh extent map to produce a global, spatially explicit map of SOC storage in tidal marshes at 30 m resolution. Here we show the total global SOC stock to 1 m to be 1.44 Pg C, with a third of this value stored in the United States of America. On average, SOC in tidal marshes' 0-30 and 30-100 cm soil layers are estimated at 83.1 Mg C ha
-1 (average predicted error 44.8 Mg C ha-1 ) and 185.3 Mg C ha-1 (average predicted error 105.7 Mg C ha-1 ), respectively., Competing Interests: Competing interests: The authors declare no competing interests., (© 2024. The Author(s).)- Published
- 2024
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