, Volume 127, Issue 2–3, pp 323–338 | Cite as

Rapid wood decay and nutrient mineralization in an old-growth bottomland hardwood forest

  • Matthew C. Ricker
  • B. Graeme Lockaby
  • Gavin D. Blosser
  • William H. Conner


Downed woody debris is an important component of the forest floor, responsible for long-term storage of nutrients in many ecosystems. In large floodplain forests of the southeastern United States, wood loads are relatively low, suggesting these landscapes may promote rapid decomposition and nutrient turnover rates. The goals of this study were to identify the major factors responsible for wood decomposition and associated nutrient dynamics in an old-growth floodplain forest at Congaree National Park, South Carolina (USA). In situ decomposition and nutrient dynamics were quantified for 700 days (April 2011–March 2013) using wood from a common overstory species, red maple (Acer rubrum L.). During the study period, regional drought conditions allowed red imported fire ant (RIFA, Solenopsis invicta Buren) colonization and infestation of the study wood after 183 days in the field. Carbon (C) content decreased throughout the study, indicating net mineralization was occurring year-round. Invertebrate activity contributed to extremely fast decomposition rates (mean k 0.650 ± 0.02 year−1) and wood turnover times (mean 4.79 ± 0.15 years). In contrast to C, wood nitrogen (N) and phosphorus (P) content increased following RIFA infestation, displaying net nutrient immobilization. The rapid turnover rates measured at CONG indicate that the C storage function of woody debris may be diminished, but availability of mineralized N and P may also have increased the importance of wood stocks to support forest net primary productivity.


Wood decomposition Old-growth forest Floodplain biogeochemistry 



The authors are grateful for field and laboratory assistance provided by Robin Governo, Andrew Parsons, Robert Price, Lauren Behnke, Nate Click, Meg Bloodworth, Catherine Justice, Theresa Thom, Cliff Hupp, Ed Schenk, Frank Henning, and David Shelley. We also would like to thank Joey Shaw and Yucheng Feng who helped improve draft versions of this manuscript. Funding and support for this research was provided by the United States Geological Survey, the United States National Park Service, and the United States Department of Agriculture National Institute of Food and Agriculture under project number SC-1700424. Technical Contribution No. 6408 of the Clemson University Experiment Station.

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Copyright information

© Springer International Publishing Switzerland 2016

Authors and Affiliations

  • Matthew C. Ricker
    • 1
  • B. Graeme Lockaby
    • 2
  • Gavin D. Blosser
    • 3
  • William H. Conner
    • 3
  1. 1.Department of Environmental, Geographical, and Geological SciencesBloomsburg University of PennsylvaniaBloomsburgUSA
  2. 2.School of Forestry and Wildlife SciencesAuburn UniversityAuburnUSA
  3. 3.Baruch Institute of Coastal Ecology and Forest ScienceClemson UniversityGeorgetownUSA

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