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Article Dans Une Revue Ecological Engineering Année : 2021

Response of earthworm communities to soil engineering and soil isolation in urban landscapes

Résumé

Engineered soils provide numerous ecosystem services in urban landscapes, such as water regulation and plant growth. They are constructed to optimize soil physicochemical properties but their biological properties are given little consideration. In particular, earthworm communities may be highly impacted by soil engineering processes and soil isolation caused by asphalted surfaces separating soils, and in particular roadside soils, from pseudo-natural soils. In this context, this study aimed to evaluate (i) the effects of soil engineering processes applied to construct roadside soils, and (ii) the effects of soil isolation from pseudo-natural soils by asphalted surfaces on earthworm communities. The study was conducted in an urban landscape in the suburbs of Paris, France. We sampled earthworms in roadside soils from two distinct soil engineering processes: basic engineering (BER) associated with shallow stripping depth and advanced engineering (AER) associated with deep stripping depth and organic amendment. Within each soil engineering process, two levels of soil isolation were defined depending on the asphalted surface separating roadside soils from pseudo-natural soils: light isolation (LI) in case of a narrow cycle path, and high isolation (HI) in case of a wide road. Soil engineering did not affect the total earthworm abundance whereas the total species richness was negatively impacted in comparison to nearby pseudo-natural soils. High soil isolation differently impacted earthworm communities depending on the engineering process. Regarding AER, earthworm abundance and species richness were significantly lower in HI than in LI while no differences were observed between BER-LI and BER-HI. Overall, engineering processes define the soil's ability to host earthworms, and soil isolation defines soil ability to be colonized from nearby environments. Considering the contribution of earthworms to the provision of ecosystem services, both soil engineering and soil isolation should be taken into account in urban projects to optimize their development in urban landscapes. © 2021 Elsevier B.V.
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Dates et versions

hal-03283803 , version 1 (02-08-2023)

Licence

Paternité - Pas d'utilisation commerciale

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Jeanne Maréchal, Kevin Hoeffner, Xavier Marié, Daniel Cluzeau. Response of earthworm communities to soil engineering and soil isolation in urban landscapes. Ecological Engineering, 2021, 169, pp.106307. ⟨10.1016/j.ecoleng.2021.106307⟩. ⟨hal-03283803⟩
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