Skip to Main Content
Soil organic matter formation and sequestration across a forested floodplain chronosequenceAuthor(s): John D. Wigginton; B. Graeme Lockaby; Carl C. Trettin
Source: Ecological Engineering 15 (2000) S141-Sl55
Publication Series: Miscellaneous Publication
PDF: View PDF (308 KB)
DescriptionSuccessional changes in soil organic matter formation and carbon sequestration across a forested floodplain chronosequence were studied at the Savannah river site, National Environmental Research Park, SC, US. Four floodplain sites were selected for study, three of which are in various stages of recovery from impact due to thermal effluent discharge. The fourth is a minimally disturbed reference site. Forest floor organic matter increases rapidly during early secondary succession, with a maximum of 657 g/m2 and decreasing to 338 g/m2 during the later seral stages. Carbon content in the forest floor also reflected this pattern, with levels greatest during early succession and declining thereafter. Changes in carbon pools of the forest floor are primarily driven by changing levels of forest floor biomass in the various stages of succession, rather than element concentrations. The composition of the forest floor from the various stages differed markedly. The percent herbaceous material declined during succession from 74% in an early stage to < 1% in the latest seral stage. Conversely, the amount of woody foliage increased from 6.7 to more than 70% in late succession. Measures of the degree of transformation of forest floor litter to soil organic matter using the lignocellulose index (LCI) did not differ between stages of succession. Percent lignin and percent cellulose of the forest floor were similar between stages and ranged from 13.8-16.3, and 30.4-32.5%, respectively. Carbon content of the mineral soil increased with successional stage of the floodplain chronosequence. Soil carbon content ranged from 15.6 kg/m2 per 0.7 m in the earliest stage of succession to 55.9 kg/m2 in late succession. Regression analyses indicated that it may take over 50 years for carbon levels to reach 75% of that of the reference site. The evidence also suggests that soil structure was disrupted by the disturbance, producing a greater proportion of microaggregates in early seral stages. The formation of soil macroaggregate structure, which may facilitate the accrual of carbon, appears to be occurring slowly.
- You may send email to firstname.lastname@example.org to request a hard copy of this publication.
- (Please specify exactly which publication you are requesting and your mailing address.)
- We recommend that you also print this page and attach it to the printout of the article, to retain the full citation information.
- This article was written and prepared by U.S. Government employees on official time, and is therefore in the public domain.
CitationWigginton, John D.; Lockaby, B. Graeme; Trettin, Carl C. 2000. Soil organic matter formation and sequestration across a forested floodplain chronosequence. Ecological Engineering 15 (2000) S141-Sl55
Keywordssoil organic matter, carbon, forest floor, fractionation, floodplain, restoration, succession
- N2 fixing alder (Alnus viridis spp.fruticosa) effects on soil properties across a secondary successional chronosequence in interior Alaska
- Soil nitrogen accretion along a floodplain terrace chronosequence in northwest Alaska: Influence of the nitrogen-fixing shrub Shepherdia Canadensis
- Sphagnum mosses limit total carbon consumption during fire in Alaskan black spruce forests
XML: View XML