@article{fdi:010090629,
  title = {{L}ocal variations in soil compaction in the drilosphere of a wide range of earthworms and links with ecological categories and functional traits},
  author = {{P}ham, {Q}. {V}. and {C}apowiez, {Y}. and {N}guyen, {A}. {D}. and {J}ouquet, {P}ascal and {N}guyen, {T}. {T}. and {L}am, {D}. {H}. and {T}ran, {T}. {M}. and {B}ottinelli, {N}icolas},
  editor = {},
  language = {{ENG}},
  abstract = {{E}arthworms can compact the soil through the production of casts and by pushing the soil when burrowing. {H}owever, how different ecological categories differently affect these processes is poorly known. {T}his study aimed to expand our knowledge on the compaction within the drilosphere and to examine similarities and differences between ecological categories. {W}e sampled 21 earthworm species in {V}ietnam whose bioturbating behaviours and morpho-anatomical traits had been previously studied. {O}ne individual was incubated in soil core for four weeks under laboratory conditions. {A}fter incubation, the following drilosphere properties were assessed using {X}-ray computed tomography: the volume and compaction of casts, the volume of empty burrows, the compaction of burrow walls and the radius of lateral compaction around burrows. {T}he drilosphere volume decreased in the following order: anecic (8.5%), endogeic (2.5%), intermediate (1.5%) and epigeic species (0.5%). {T}ogether, casts and lateral compaction occupied more than 70% of the whole drilosphere regardless of the ecological category. {B}oth anecic and endogeic species had relatively similar effects on soil compaction. {T}hey compacted surface casts (up to 1.45-fold), belowground casts (up to 1.20-fold), and burrow walls (up to 1.25-fold) and induced the widest lateral compaction around burrows (up to 11 mm). {C}onversely, epigeic species had markedly fewer effects, increasing compaction from 1.10- to 1.20-fold and producing the narrowest lateral compaction (1 mm). {I}ntermediate species showed large variability, which included species with little and large effects on compaction. {F}inally, we showed that food ingestion, muscle thickness and body size were the most related to the compaction of the drilosphere. {I}t is concluded that the soil volume compacted by the earthworms is larger than the volume of empty burrows. {A}dditionally, our study encourages further investigations using functional traits to overcome some limitations associated with the traditional ecological category approach.},
  keywords = {{B}iostructures ; {B}ioturbation ; {E}ffect traits ; {VIET} {NAM}},
  booktitle = {},
  journal = {{S}oil {B}iology and {B}iochemistry},
  volume = {194},
  numero = {},
  pages = {109435 [10 p.]},
  ISSN = {0038-0717},
  year = {2024},
  DOI = {10.1016/j.soilbio.2024.109435},
  URL = {https://www.documentation.ird.fr/hor/fdi:010090629},
}