Effect of Ni and black carbon addition on bacterial production, respiration and community composition on aggregates in the barrier reef Lagoon of Noumea (New Caledonia) - Institut Méditerranéen d'Oceanologie - Mediterranean Institute of Oceanography (MIO) Accéder directement au contenu
Communication Dans Un Congrès Année : 2019

Effect of Ni and black carbon addition on bacterial production, respiration and community composition on aggregates in the barrier reef Lagoon of Noumea (New Caledonia)

Y Bettarel
O Pringault
  • Fonction : Auteur
J-P Torréton
  • Fonction : Auteur
Xavier Mari

Résumé

The barrier reef lagoon of Noumea (New Caledonia) is potentially influenced by Ni and black carbon (BC) rich aerosols (the two latter originating from a Ni power plant). Experiments were performed with lagoon water collected close to the reef crest to assess the effect of anthropogenic influences on bacterial abundance (BA), production (BP), respiration (BR), growth efficiency (BGE) and community composition (BCC) in artificial produced aggregates. In both treatments, BA and VA were not affected or enhanced compared to the unamended control (up to 40% for BA and 180% for VA). BP was not or negatively affected (up to70%). No clear trend was found for BR in the Ni treatment; in the BC treatment BR was enhanced by 63-69%. BGE was reduced in both treatments. The strongest effects on BCC profiles as determined by 16S rDNA denaturing gradient gel electrophoresis were due to incubation time treatment particularly for BC. BP was not or negatively (-38-70%) influenced. A phylotype corresponding to a specific BC band was closely related to Acinetobacter oleivorans DR1. Thus, this experimental study confirms potential anthropogenic influences for the bacterial and viral community on aggregates in the Bay of Noumea.

Domaines

Ecosystèmes
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Dates et versions

hal-03946289 , version 1 (19-01-2023)

Identifiants

  • HAL Id : hal-03946289 , version 1

Citer

Markus G Weinbauer, Chiaki Motegi, Y Bettarel, Christophe Migon, O Pringault, et al.. Effect of Ni and black carbon addition on bacterial production, respiration and community composition on aggregates in the barrier reef Lagoon of Noumea (New Caledonia). EGU General Assembly 2019, 2019, Vienna, Austria. ⟨hal-03946289⟩
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