Soil fauna contribution to winter decomposition in subalpine grasslands

  • Sylvain Coq CEFE UMR 5175, CNRS – Université de Montpellier – Université Paul Valéry Montpellier – EPHE. 1919, route de Mende, F-34293 Montpellier cedex 5, France
  • Sébastien Ibanez Laboratoire d’Ecologie Alpine UMR CNRS 5553 Université de Savoie F-73376, Le Bourget-du-lac, France
Keywords: detritivorous fauna, Patzkea paniculata, Dactylis glomerata, litterbags, mesh size

Abstract

Cold biomes significantly contribute to the global carbon cycle, and decomposition in these ecosystems is expected to be affected by climatic change. Modifications of snow cover patterns are expected to affect litter decomposition, but the underlying mechanisms remain unclear. In this study, we investigated whether soil meso- and microfauna significantly contribute to wintertime decomposition. Using litterbags with two mesh sizes (68 µm and 1500 µm), we found that small mesh litterbags reduced winter decomposition in the field by 3.4 % for Patzkea paniculata litter and by 18.9 % for Dactylis glomerata litter, indicating a significant contribution of soil meso- and microfauna to litter decomposition under the snowpack. Whereas previous studies showed that winter decomposition was not related to the soil fauna community, our results suggest that this community, and its possible alteration by climate change, may impact litter decomposition and carbon dynamics in cold biomes.

 

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Published
2019-12-01
How to Cite
Coq, S., & Ibanez, S. (2019). Soil fauna contribution to winter decomposition in subalpine grasslands. SOIL ORGANISMS, 91(3), 107–112. https://doi.org/10.25674/so91iss3pp107
Section
ARTICLES