Coral-associated viruses and bacteria in the Ha Long Bay, Vietnam - Université de Montpellier Accéder directement au contenu
Article Dans Une Revue Aquatic Microbial Ecology Année : 2015

Coral-associated viruses and bacteria in the Ha Long Bay, Vietnam

Résumé

Viruses inhabiting the surface mucus layer of scleractinian corals have received little ecological attention so far. Yet they have recently been shown to be highly abundant and could even play a pivotal role in coral health. A fundamental aspect that remains unresolved is whether their abundance and diversity change with the trophic state of their environment. The present study examined the variability in the abundance of viral and bacterial epibionts on 13 coral species collected from 2 different sites in the Ha Long Bay, Vietnam: one station heavily affected by anthropogenic activity (Cat Ba Island) and one protected offshore station (Long Chau Island). In general, viral abundance was significantly higher in coral mucus (mean = 10.6 +/- 2.0 x 10(7) virus-like particles ml(-1)) than in the surrounding water (5.2 +/- 1.3 x 10(7) virus-like particles ml(-1)). Concomitantly, the abundance and community diversity (inferred from phylogenetic and morphological analyses) of their mucosal bacterial hosts strongly differed from their planktonic counterparts. Surprisingly, despite large differences in water quality and nutrient concentrations between Cat Ba and Long Chau, there were no significant differences in the concentrations of epibiotic viruses and bacteria measured in the only 2 coral species (i.e. Pavona decussata and Lobophyllia flabelliformis) that were common at both sites. The ability of corals to shed bacteria to compensate for their fast growth in nutrient-rich mucus is questioned here.
Fichier principal
Vignette du fichier
73680.pdf (774.01 Ko) Télécharger le fichier
Origine Fichiers éditeurs autorisés sur une archive ouverte

Dates et versions

hal-01921797 , version 1 (15-05-2024)

Identifiants

Citer

The Thu Pham, van Thuoc Chu, Thu Viet Ha Bui, Thanh Thuy Nguyen, Quang Huy Tran, et al.. Coral-associated viruses and bacteria in the Ha Long Bay, Vietnam. Aquatic Microbial Ecology, 2015, 76 (2), pp.149 - 161. ⟨10.3354/ame01775⟩. ⟨hal-01921797⟩
82 Consultations
1 Téléchargements

Altmetric

Partager

Gmail Mastodon Facebook X LinkedIn More