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Aubé, J., Senin, P., Pringault, O., Bonin, P., Deflandre, B., Bouchez, O., et al. (2016). The impact of long-term hydrocarbon exposure on the structure, activity, and biogeochemical functioning of microbial mats. Marine Pollution Bulletin, 111(1), 115–125.
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Bouchez, A., Pascault, N., Chardon, C., Bouvy, M., Cecchi, P., Lambs, L., et al. (2013). Mangrove microbial diversity and the impact of trophic contamination. Marine pollution bulletin, 66(1–2), 39–46.
Résumé: Mangroves are threatened ecosystems that provide numerous ecosystem services, especially through their wide biodiversity, and their bioremediation capacity is a challenging question in tropical areas. In a mangrove in Mayotte, we studied the potential role of microbial biofilm communities in removing nutrient loads from pre-treated wastewater. Microbial community samples were collected from tree roots, sediments, water, and from a colonization device, and their structure and dynamics were compared in two areas: one exposed to sewage and the other not. The samples from the colonization devices accurately reflected the natural communities in terms of diversity. Communities in the zone exposed to sewage were characterized by more green algae and diatoms, higher bacteria densities, as well as different compositions. In the area exposed to sewage, the higher cell densities associated with specific diversity patterns highlighted adapted communities that may play a significant role in the fate of nutrients.
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Bouchoucha, M., Brach-Papa, C., Gonzalez, J. - L., Lenfant, P., & Darnaude, A. M. (2018). Growth, condition and metal concentration in juveniles of two Diplodus species in ports. Marine Pollution Bulletin, 126(Supplement C), 31–42.
Résumé: High abundances of juvenile fish in certain ports suggest they might provide alternative nursery habitats for several species. To further investigate this possibility, post-settlement growth, metal uptake and body condition were estimated in 127 juveniles of two seabream species, collected in 2014–15, inside and outside the highly polluted ports of the Bay of Toulon. This showed that differences in local pollution levels (here in Hg, Cu, Pb and Zn) are not consistently mirrored within fish flesh. Muscle metal concentrations, below sanitary thresholds for both species, were higher in ports for Cu, Pb and V only. Otherwise, fish muscle composition principally differed by species or by year. Juvenile growth and condition were equivalent at all sites. Higher prey abundance in certain ports might therefore compensate the deleterious effects of pollution, resulting in similar sizes and body conditions for departing juvenile fish than in nearby natural habitats.
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Bouloubassi, I., Méjanelle, L., Pete, R., Fillaux, J., Lorre, A., & Point, V. (2006). PAH transport by sinking particles in the open Mediterranean Sea: A 1 year sediment trap study. Marine Pollution Bulletin, 52(5), 560–571.
Résumé: One year time series of sinking particles were collected at two depths in the open Mediterranean Sea and analysed for polycyclic aromatic hydrocarbons (PAH). Average total PAH concentrations were 593 ± 284 ng g -1 at 250 m and 551 ± 198 ng g -1 at 2850 m. Total PAH fluxes averaged 73 ± 58 ng m -2 d -1 at 250 m and 53 ± 39 ng m -2 d -1 at 2850 m. Contamination levels and, thus, exposure of marine organisms to PAH are comparable in surface and deep waters. Deep waters appear as a significant, yet overlooked, PAH sink. PAH temporal patterns show noticeable seasonality. This is partly due to varying levels of specific components such as the winter increase of pyrolytic PAH. Downward transport processes and the nature of sinking particles also impact on PAH fluxes, as inferred during periods of increasing productivity. Different phase-associations and interactions with particulate organic carbon for low-MW fossil PAH and high-MW pyrolytic PAH influence their downward transport efficiency. © 2005 Elsevier Ltd. All rights reserved.
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Bouvy, M., Combe, M., Bettarel, Y., Dupuy, C., Rochelle-Newall, E., & Charpy, L. (2012). Uncoupled viral and bacterial distributions in coral reef waters of Tuamotu Archipelago (French Polynesia). Marine Pollution Bulletin, 65(10–12), 506–515.
Résumé: This study examined the distribution of virioplankton and bacterioplankton in two coral reef systems (Ahe and Takaroa atolls) in the Tuamotu Archipelago, in comparison with the surrounding oligotrophic ocean. Mean concentrations of 4.8 × 105 and 6.2 × 105 cells ml−1 for bacteria and 8.1 × 106 and 4.3 × 106 VLP (virus-like particle) ml−1 were recorded in Ahe and Takaroa lagoons, respectively. Chlorophyll-a concentrations and dissolved organic matter were higher in Ahe whereas 3H thymidine incorporation rates were higher in Takaroa. First data on lytic and lysogenic strategies of phages in coral reef environments were discussed in this paper. The fraction of visibly infected cells by viruses was negligible regardless of the lagoon station (mean = 0.15%). However, the fraction of lysogenic cells ranged between 2.5% and 88.9%. Our results suggest that the distribution patterns of virioplankton are apparently not coupled to the spatial dynamics of the bacterioplankton communities.
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