000206302 001__ 206302
000206302 005__ 20190829172528.0
000206302 0247_ $$2doi$$a10.1016/j.geoderma.2014.12.007
000206302 022__ $$a0016-7061
000206302 02470 $$2ISI$$a000350927000006
000206302 037__ $$aARTICLE
000206302 245__ $$aEffects of endogeic earthworms on the soil organic matter dynamics and the soil structure in urban and alluvial soil materials
000206302 260__ $$bElsevier$$c2015$$aAmsterdam
000206302 269__ $$a2015
000206302 300__ $$a8
000206302 336__ $$aJournal Articles
000206302 520__ $$aEarthworms are considered as key actors of soil processes at different spatial and temporal scales and provide essential ecosystem services linked to climate regulation or primary production. However, little is known about their basic functional roles (e.g. organic matter decomposition, soil structuring processes) in perturbed systems such as urban or alluvial soils. Alluvial soils are characterized by regular physical perturbation through flooding and associated erosion/sedimentation processes which are rather similar to perturbations (e.g. temporal instability, spatial heterogeneity) affecting urban soils. Due to their close soil characteristics, we hypothesized that in both cases, soil functioning is similar with respect to soil fauna activity. Under controlled conditions, our objective was to investigate the effects of two endogeic earthworm species, Allolobophora chlorotica (pink morph) and Aporrectodea rosea (the two most abundant species found in the studied urban site), on soil organic matter (SOM) dynamics and soil structure (network of earthworm burrows) comparing an urban and an alluvial soil. We investigated the growth of individuals (weight gain and reproduction success) and assessed their effects on SOM decomposition (cumulative C–CO2 emission, nitrogen and phosphorus mineralization) and soil structure (macroporosity, total length and connectivity of segments) after one and three months of incubation. Our results showed higher growth of A. rosea in the alluvial soil compared to the urban soil. However, the total length of burrows, carbon and nitrogen mineralization were often higher in the urban soil especially when the two species were combined. This trend can be mainly explained by lower organic matter content found in the urban soil which may influence positively the burrowing activity and negatively the growth of earthworms. Endogeic earthworms appear a key feature of the soil functioning in the urban context through their roles on organic matter transformation, the formation and maintenance of the soil structure.
000206302 6531_ $$aDisturbed soils
000206302 6531_ $$aUrban soil
000206302 6531_ $$aAlluvial soil
000206302 6531_ $$aAllolobophora chlorotica
000206302 6531_ $$aAporrectodea rosea
000206302 6531_ $$aX-ray tomography
000206302 6531_ $$aBurrow networks
000206302 6531_ $$aMicrocosms
000206302 700__ $$aAmossé, Joël
000206302 700__ $$0245229$$g134475$$aTurberg, Pascal
000206302 700__ $$aKohler-Milleret, Roxane
000206302 700__ $$aGobat, Jean-Michel
000206302 700__ $$aLe Bayon, Renée-Claire
000206302 773__ $$j243-244$$tGeoderma$$q50-57
000206302 909C0 $$xU11021$$pECOS$$0252129
000206302 909CO $$qENAC$$particle$$ooai:infoscience.tind.io:206302
000206302 917Z8 $$x134475
000206302 937__ $$aEPFL-ARTICLE-206302
000206302 973__ $$rREVIEWED$$sPUBLISHED$$aOTHER
000206302 980__ $$aARTICLE