@article{fdi:010078968,
  title = {{C}haracterization of the gut microbiota of the antarctic heart urchin ({S}patangoida) {A}batus agassizii},
  author = {{S}chwob, {G}. and {C}abrol, {L}{\'e}a and {P}oulin, {E}. and {O}rlando, {J}.},
  editor = {},
  language = {{ENG}},
  abstract = {{A}batus agassizii is an irregular sea urchin species that inhabits shallow waters of {S}outh {G}eorgia and {S}outh {S}hetlands {I}slands. {A}s a deposit-feeder, {A}. agassizii nutrition relies on the ingestion of the surrounding sediment in which it lives barely burrowed. {D}espite the low complexity of its feeding habit, it harbors a long and twice-looped digestive tract suggesting that it may host a complex bacterial community. {H}ere, we characterized the gut microbiota of specimens from two {A}. agassizii populations at the south of the {K}ing {G}eorge {I}sland in the {W}est {A}ntarctic {P}eninsula. {U}sing a metabarcoding approach targeting the 16{S} r{RNA} gene, we characterized the {A}batus microbiota composition and putative functional capacity, evaluating its differentiation among the gut content and the gut tissue in comparison with the external sediment. {A}dditionally, we aimed to define a core gut microbiota between {A}. agassizii populations to identify potential keystone bacterial taxa. {O}ur results show that the diversity and the composition of the microbiota, at both genetic and predicted functional levels, were mostly driven by the sample type, and to a lesser extent by the population location. {S}pecific bacterial taxa, belonging mostly to {P}lanctomycetacia and {S}pirochaetia, were differently enriched in the gut content and the gut tissue, respectively. {P}redictive functional profiles revealed higher abundance of specific pathways, as the sulfur cycle in the gut content and the amino acid metabolism, in the gut tissue. {F}urther, the definition of a core microbiota allowed to obtain evidence of specific localization of bacterial taxa and the identification of potential keystone taxa assigned to the {D}esulfobacula and {S}pirochaeta genera as potentially host selected. {T}he ecological relevance of these keystone taxa in the host metabolism is discussed.},
  keywords = {heart sea urchin ; deposit-feeder ; {A}batus agassizii ; gut microbiota ; core-microbiota ; keystone ; {W}est {A}ntarctic {P}eninsula ; {A}ntarctica ; {ANTARCTIQUE}},
  booktitle = {},
  journal = {{F}rontiers in {M}icrobiology},
  volume = {11},
  numero = {},
  pages = {art. 308 [18p.]},
  ISSN = {1664-302{X}},
  year = {2020},
  DOI = {10.3389/fmicb.2020.00308},
  URL = {https://www.documentation.ird.fr/hor/fdi:010078968},
}