@article{fdi:010097530,
  title = {{S}patial structuring dominates over seasonality in tropical coastal microbiomes : insights from {N}ew {C}aledonia's {I}ndo-{P}acific lagoon},
  author = {{S}tenger, {P}. and {M}ajorel, {C}larisse and {V}alette, {L}. and {I}hage, {W}. and {J}ardin-{C}amps, {M}. and {J}ourand, {P}hilippe and {A}nton-{L}eberre, {V}.},
  editor = {},
  language = {{ENG}},
  abstract = {{T}ropical coastal ecosystems harbor diverse microbes essential for biogeochemical cycling and serve as sentinels of environmental change. {H}owever, microbial community profiles remain largely undocumented across the {S}outhwest {P}acific. {W}e investigated bacterial communities in coastal and lagoonal waters surrounding {N}oum & eacute;a, {N}ew {C}aledonia, an area under increasing urban pressure. {O}ur objective was to determine whether spatial heterogeneity or seasonal variation primarily structures these communities and how anthropogenic activities shape microbial diversity. {F}orty-two seawater samples were collected from seven sites spanning anthropized bays, mangrove estuaries, and offshore lagoon waters during hot and cold seasons. {W}e found that spatial gradients explained significantly more variation in community structure ({R}-2 = 0.25) than seasonal changes ({R}-2 = 0.04), revealing distinct microbial signatures along the land-to-sea continuum. {C}oastal and mangrove sites harbored more copiotrophic taxa and elevated levels of predicted pathogen-associated functional pathways, though these predictions are based on 16{S} r{RNA} data, and require validation with metagenomic or functional assays. {S}easonal shifts mainly involved {C}yanobacteria ({S}ynechococcus up arrow, {P}rochlorococcus down arrow in warm season) and archaeal {M}arine {G}roup {II}, reflecting temperature-mediated niche partitioning. {T}his study establishes the first spatial and seasonal microbial inventory for {N}ew {C}aledonian coastal ecosystems, suggesting associations between anthropogenic influence and microbial community health. {S}patial dominance highlights the potential value of local management, while temperature sensitivity of key taxa underscores the importance of integrating microbial monitoring into coastal conservation and {O}ne {H}ealth frameworks.},
  keywords = {{NOUVELLE} {CALEDONIE} ; {PACIFIQUE} {SUD} ; {NOUMEA}},
  booktitle = {},
  journal = {{J}ournal of {E}nvironmental {Q}uality},
  volume = {55},
  numero = {4},
  pages = {e70215 [18 p.]},
  ISSN = {0047-2425},
  year = {2026},
  DOI = {10.1002/jeq2.70215},
  URL = {https://www.documentation.ird.fr/hor/fdi:010097530},
}