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Impact d'amendements calco-magnésiens sur la diversité des macroinvertébrés de sols forestiers et sur certains processus fonctionnels associés. Cas du massif vosgien (nord-est, France)

Abstract : The use of liming (Ca-Mg) on acidified forest can be interesting to counteract soil acidification and loss of nutrients caused by decades of acid atmospheric deposition. In this context, the aims of this work were to assess liming effect on (i) taxonomical diversity and community structure of soil macro-invertebrates and on (ii) two associated functional processes related to earthworms: soil structuration and humus evolution. The PhD project was realised in three sites from the Vosges mountains (North-eastern, France): two forest mountain catchments (one lying on sandstone and the other on granite) limed in 2003 and the public hill forest of Humont at a lower altitude limed in 1991 and 2008. Results showed that 4 years after liming in mountain forest, the total abundance of macro-invertebrates decreased, while the species richness were similar. However, the community structure strongly differed, and less than 50% of the species were common to limed and control sites. Moreover, 43 species appeared to be indicators of liming. Predator taxa abundance decreased whereas the detritivorous were favoured by lime addition. The in vitro experiments showed a positive effect of liming on soil structuration by earthworm activities (cast production and burrowing activities). In the Humont forest, liming at medium-term (4 years) and long term (20 years) have an important effect on the Aporrectodea velox population, an endemic vosgian species. Related to its high biomass, this increase strongly improved soil physicochemical parameters such as soil structure and humus morphology.
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  • HAL Id : tel-01749227, version 1
  • PRODINRA : 209327

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Apolline Auclerc. Impact d'amendements calco-magnésiens sur la diversité des macroinvertébrés de sols forestiers et sur certains processus fonctionnels associés. Cas du massif vosgien (nord-est, France). Ecotoxicologie. Université de Lorraine, 2012. Français. ⟨NNT : 2012LORR0056⟩. ⟨tel-01749227⟩

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