{"id":15724,"date":"2023-01-13T12:41:00","date_gmt":"2023-01-13T18:41:00","guid":{"rendered":"https:\/\/ewn.erdc.dren.mil\/?post_type=publications&#038;p=15724"},"modified":"2025-02-26T10:56:51","modified_gmt":"2025-02-26T16:56:51","slug":"quantifying-mineral-associated-organic-matter-in-wetlands-as-an-indicator-of-the-degree-of-soil-carbon-protection","status":"publish","type":"publications","link":"https:\/\/ewn.erdc.dren.mil\/publications\/archive\/quantifying-mineral-associated-organic-matter-in-wetlands-as-an-indicator-of-the-degree-of-soil-carbon-protection\/","title":{"rendered":"Quantifying mineral-associated organic matter in wetlands as an indicator of the degree of soil carbon protection"},"content":{"rendered":"\n<p>Mineral-associated organic matter (MAOM) is one pool of SOM recently shown to protect soil organic C from mineralization. However, most MAOM research has been in agriculture and forest mineral soils. Given the magnitude of soil C stored in wetlands, this study sought to determine the abundance of MAOM in wetlands. A standard method for quantifying MAOM in terrestrial soils was tested, modified, and optimized with three unique wetland soils. Using a physical fractionation method followed by a density fractionation, it was concluded that field moist soils and a dispersant were necessary for fractionating wetland soils (0\u201350 cm). The Bayhead Swamp soil had the greatest total C (484.07 \u00b1 1.25 mg C g soil -1), but the smallest MAOM pool (0.63 %); most of the C was in the light fraction as particulate organic matter (POM, >98 %). The sandy-peat Cypress Dome soil also lacked MAOM (1.09 %) and was dominated by POM (66.26 %). The silt-rich Brackish Marsh had the least total C (94.37 \u00b1 1.67 mg C g soil -1), but the largest fraction of protected C (24.60 % MAOM). Nitrogen (N) followed similar trends to C, except in the Brackish Marsh where nearly half the total N was MAOM. This research represents the first step in evaluating the role of MAOM in C persistence in organic-rich wetland soils; future work should consider C physical fraction, in addition to C quantity.<\/p>\n\n\n\n<p><\/p>\n","protected":false},"excerpt":{"rendered":"<p>Mineral-associated organic matter (MAOM) is one pool of SOM recently shown to protect soil organic C from mineralization. However, most MAOM research has been in agriculture and forest mineral soils. Given the magnitude of soil C stored in wetlands, this study sought to determine the abundance of MAOM in wetlands. A standard method for quantifying [&hellip;]<\/p>\n","protected":false},"featured_media":15591,"template":"","tags":[],"class_list":["post-15724","publications","type-publications","status-publish","has-post-thumbnail","hentry"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.4 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Quantifying mineral-associated organic matter in wetlands as an indicator of the degree of soil carbon protection - Engineering With Nature<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/ewn.erdc.dren.mil\/publications\/archive\/quantifying-mineral-associated-organic-matter-in-wetlands-as-an-indicator-of-the-degree-of-soil-carbon-protection\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Quantifying mineral-associated organic matter in wetlands as an indicator of the degree of soil carbon protection - Engineering With Nature\" \/>\n<meta property=\"og:description\" content=\"Mineral-associated organic matter (MAOM) is one pool of SOM recently shown to protect soil organic C from mineralization. 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