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A simulation model to evaluate the impacts of invasive earthworms on soil carbon dynamics

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  • Huang, Ching-Yu
  • Hendrix, Paul F.
  • Fahey, Timothy J.
  • Bohlen, Patrick J.
  • Groffman, Peter M.

Abstract

Recent studies have reported that earthworm invasions alter native communities and impact nutrient cycling in terrestrial ecosystems. We developed a simulation model to evaluate the potential impacts of earthworm invasions on carbon dynamics, taking into consideration earthworm feeding strategies and priming effects on the microorganisms through their casting activities. Responses of carbon stocks (forest litter, soil organic matter, microbial biomass and earthworm populations) and carbon fluxes (litter decomposition, earthworm consumption, and microbial respiration) were used to evaluate an earthworm invasion of a forest ecosystem. Data from a northern temperate forest (Arnot Forest, New York) were adapted for model calibration and evaluation. Simulation results suggest that the impact and outcome of earthworm invasions are affected by pre-invasion resource availability (litter and soil organic matter), invasive earthworm assemblages (particularly feeding strategy), and invasion history (associated with earthworm population dynamics). The abovementioned factors may also determine invasion progress of earthworm species. The accuracy of the model could be improved by the addition of environmental modules (e.g., soil water regimes), precise parameters accounting for individual species attributes under different environmental conditions (e.g. utilization ability of different types of food resources), as well as earthworm population dynamics (size and structure) and interactions with predators and other invasive/indigenous species during the invasion progress. Such an earthworm invasion model could provide valuable evaluation of the complicated responses of carbon dynamics to earthworm invasions in a range of forest ecosystems, particularly under global change scenarios.

Suggested Citation

  • Huang, Ching-Yu & Hendrix, Paul F. & Fahey, Timothy J. & Bohlen, Patrick J. & Groffman, Peter M., 2010. "A simulation model to evaluate the impacts of invasive earthworms on soil carbon dynamics," Ecological Modelling, Elsevier, vol. 221(20), pages 2447-2457.
  • Handle: RePEc:eee:ecomod:v:221:y:2010:i:20:p:2447-2457
    DOI: 10.1016/j.ecolmodel.2010.06.023
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    References listed on IDEAS

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    1. Drury, K.L.S. & Drake, J.M. & Lodge, D.M. & Dwyer, G., 2007. "Immigration events dispersed in space and time: Factors affecting invasion success," Ecological Modelling, Elsevier, vol. 206(1), pages 63-78.
    2. Hobbelen, P.H.F. & van Gestel, C.A.M., 2007. "Using dynamic energy budget modeling to predict the influence of temperature and food density on the effect of Cu on earthworm mediated litter consumption," Ecological Modelling, Elsevier, vol. 202(3), pages 373-384.
    3. Pelosi, Céline & Bertrand, Michel & Makowski, David & Roger-Estrade, Jean, 2008. "WORMDYN: A model of Lumbricus terrestris population dynamics in agricultural fields," Ecological Modelling, Elsevier, vol. 218(3), pages 219-234.
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    Cited by:

    1. Komarov, Alexander & Chertov, Oleg & Bykhovets, Sergey & Shaw, Cindy & Nadporozhskaya, Marina & Frolov, Pavel & Shashkov, Maxim & Shanin, Vladimir & Grabarnik, Pavel & Priputina, Irina & Zubkova, Elen, 2017. "Romul_Hum model of soil organic matter formation coupled with soil biota activity. I. Problem formulation, model description, and testing," Ecological Modelling, Elsevier, vol. 345(C), pages 113-124.
    2. Chertov, Oleg & Shaw, Cindy & Shashkov, Maxim & Komarov, Alexander & Bykhovets, Sergey & Shanin, Vladimir & Grabarnik, Pavel & Frolov, Pavel & Kalinina, Olga & Priputina, Irina & Zubkova, Elena, 2017. "Romul_Hum model of soil organic matter formation coupled with soil biota activity. III. Parameterisation of earthworm activity," Ecological Modelling, Elsevier, vol. 345(C), pages 140-149.

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