title: Environment drives high phylogenetic turnover among oceanic bacterial communities.
abstract: Although environmental filtering has been observed to influence the biodiversity patterns of marine bacterial communities, it was restricted to the regional scale and to the species level, leaving the main drivers unknown at large biogeographic scales and higher taxonomic levels. Bacterial communities with different species compositions may nevertheless share phylogenetic lineages, and phylogenetic turnover (PT) among those communities may be surprisingly low along any biogeographic or environmental gradient. Here, we investigated the relative influence of environmental filtering and geographical distance on the PT between marine bacterial communities living more than 8000 km apart in contrasted abiotic conditions. PT was high between communities and was more structured by local environmental factors than by geographical distance, suggesting the predominance of a lineage filtering process. Strong phenotype-environment mismatches observed in the ocean may surpass high connectivity between marine microbial communities.
authors.affiliation: Université de Lyon, INRA, CNRS, Université Lyon 1, Ecologie Microbienne (UMR 5557, USC 1193), 43 Boulevard du 11 Novembre 1918, 69622 Villeurbanne, France. thomas.pommier@univ-lyon1.fr
authors.forename: Thomas
authors.initials: T
authors.lastname: Pommier
authors.forename: Emmanuel J P
authors.initials: EJ
authors.lastname: Douzery
authors.forename: David
authors.initials: D
authors.lastname: Mouillot
mesh_terms: D001419:Bacteria / Q000145:classification / Q000235:genetics*; D058448:Biota; D002734:Chlorophyll / Q000032:analysis; D000077194:Chlorophyll A; D017753:Ecosystem; D020459:Genes, rRNA; D005843:Geography; D009792:Oceans and Seas; D010802:Phylogeny; D012329:RNA, Bacterial / Q000032:analysis* / Q000235:genetics; D012336:RNA, Ribosomal, 16S / Q000032:analysis / Q000235:genetics; D054712:Salinity; D013045:Species Specificity; D013696:Temperature; D014871:Water Microbiology
chemical_list: D012329:RNA, Bacterial; D012336:RNA, Ribosomal, 16S; D002734:Chlorophyll; D000077194:Chlorophyll A