@article{fdi:010086357,
  title = {{M}orpho-anatomical traits explain the effects of bacterial-feeding nematodes on soil bacterial community composition and plant growth and nutrition},
  author = {{B}rondani, {M}argot and {P}lassard, {C}. and {R}amstein, {E}. and {C}ousson, {A}. and {H}edde, {M}. and {B}ernard, {L}aetitia and {T}rap, {J}ean},
  editor = {},
  language = {{ENG}},
  abstract = {{B}acterial-feeding nematodes are abundant soil animals regulating microbial communities and enhancing plant nutrition and growth. {H}owever, the biological metrics driving the variable within-trophic group effects of these organisms on soil and plant functions are not yet identified. {I}n this study, we determined the effects of eight bacterial-feeding nematode genera ({A}crobeloides butschlii, {B}revibbuca sp., {C}ephalobus sp., {D}iploscapter sp., {O}scheius akosreti, {P}anagrellus redivivus, {P}ristionchus pacificus, {Z}eldia sp.) on soil bacterial communities and {P}inus pinaster growth and nutrition from organic {N} (glutamate) and {P} (phytate) supplied in a high {P}-adsorbing soil. {B}ecause nematode species harbored contrasting morpho-anatomical characteristics, we hypothesized that traits, in comparison to species identity or life strategy groups (cp classes), could explain the variable effects of the nematode species. {A}fter 50 days of growth, the inoculation of bacterial-feeding nematodes caused variable but never negative effect on plant growth and net plant {N} and {P} uptake depending on nematode species. {W}e also observed significant shifts in root traits and bacterial community composition. {F}or both soil bacterial composition and plant growth and nutrition, a selected panel of traits (e.g. body size, mouth width, procorpus width, demanian ratios b and c, relative egg size) explained soil and plant function more than did species identity or life strategy groups. {F}or instance, traits explained 77 % of plant {N} and {P} amounts while cp classes and speciesidentity explained 33 % and 46 %, respectively, according to {PLS} models. {T}he identity of traits varied according to the functions. {S}tructural equation modeling with latent variables emphasized the direct effects of nematodes on plant nutrition through excretion in comparison to indirect effects through shifts in bacterial composition and improved root ramification. {W}e discuss the relevance of bacterial-feeding nematode traits as promising biological metrics to explain the effect of these worms within the soil microbial loop framework.},
  keywords = {{B}acterial -feeding nematodes ; {E}ffect traits ; {M}icrobial loop ; {B}acterial composition ; {P}hytate ; {S}tructural equation modeling},
  booktitle = {},
  journal = {{G}eoderma},
  volume = {425},
  numero = {},
  pages = {116068 [14 p.]},
  ISSN = {0016-7061},
  year = {2022},
  DOI = {10.1016/j.geoderma.2022.116068},
  URL = {https://www.documentation.ird.fr/hor/fdi:010086357},
}