Distribution patterns of microbial communities in ultramafic landscape: A metagenetic approach highlights the strong relationships between diversity and environmental traits

Bordez Laurent, Jourand Philippe, Ducousso Marc, Carriconde Fabian, Cavaloc Yvon, Santini Sébastien, Claverie Jean-Michel, Wantiez L., Leveau Antoine, Amir Hamid. 2016. Distribution patterns of microbial communities in ultramafic landscape: A metagenetic approach highlights the strong relationships between diversity and environmental traits. Molecular Ecology, 25 (10) : 2258-2272.

https://doi.org/10.1111/mec.13621

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Url - jeu de données - Entrepôt autre : https://doi.org/10.5061/dryad.4fb1m

Quartile : Q1, Sujet : ECOLOGY / Quartile : Q1, Sujet : EVOLUTIONARY BIOLOGY / Quartile : Q1, Sujet : BIOCHEMISTRY & MOLECULAR BIOLOGY

Liste HCERES des revues (en SHS) : oui

Thème(s) HCERES des revues (en SHS) : Psychologie-éthologie-ergonomie

Résumé : Microbial species richness and assemblages across ultramafic ecosystems were investigated to assess the relationship between their distributional patterns and environmental traits. The structure of microorganism communities in the Koniambo massif, New Caledonia, was investigated using a metagenetic approach correlated with edaphic and floristic factors. Vegetation cover and soil properties significantly shaped the large phylogenetic distribution of operational taxonomic unit within microbial populations, with a mean per habitat of 3,477 (± 317) for bacteria and 712 (± 43) for fungi. Using variance partitioning, we showed that the effect of aboveground vegetation was the most significant descriptor for both bacterial and fungal communities. The floristic significant predictors explained 43% of the variation both for the bacterial and fungal community structures, while the edaphic significant predictors explained only 32% and 31% of these variations, respectively. These results confirm the previous hypothesis, that the distribution of microorganisms was more structured by the vegetation cover rather than the edaphic characteristics and that microbial diversity is not limited in ultramafic ecosystems.

Mots-clés Agrovoc : flore du sol, dynamique des populations, fertilité du sol, écologie microbienne, couverture végétale, facteur du milieu, facteur édaphique, phylogénie, taxonomie, Bacteria, champignon du sol, biodiversité, biologie du sol, type de sol, métal lourd, sol minéral, écosystème, génomique