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| Galès, Amandine; Bonnafous, Anaïs; Carré, Claire; Jauzein, Vincent; Lanouguère, Elodie; Le Floc'H, Emilie; Pinoit, Joanna; Poullain, Clothilde; Roques, Cécile; Sialve, Bruno; Simier, Monique; Steyer, Jean-philippe; Fouilland, Eric. |
| Several studies focused on wastewater treatment in High Rate Algal Ponds (HRAP) suggest that highly variable climatic conditions cause large variations of microalgal biomass productivity. In the present study, we show that similar carbon, nitrogen and phosphorus removal efficiencies were reached in different HRAPs treating urban wastewaters located in two different temperate (Mediterranean and oceanic) climates. Furthermore, similar ecological successions were observed in these HRAPs. During the start-up phase, the consumption of organic matter by detritivores, already present in the wastewater, appears to be necessary for the microalgae to grow within two weeks in spring. The growth of the rapid-growing species, Chlorella sp., followed by the... |
| Tipo: Text |
Palavras-chave: Microalgae; Predators; Bacteria; Urban effluents; Ammonia and phosphate removal. |
| Ano: 2019 |
URL: https://archimer.ifremer.fr/doc/00490/60210/63713.pdf |
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| Gales, Amandine; Triplet, Sebastien; Geoffroy, Thibault; Roques, Cécile; Carre, Claire; Le Floc'H, Emilie; Lanfranchi, Mélissa; Simier, Monique; Roque D'Orbcastel, Emmanuelle; Przybyla, Cyrille; Fouilland, Eric. |
| Recently, CO2 recycling for the production of valuable microalgae has acquired substantial interest. Most studies investigating CO2 conversion efficiency in algal cultures were based on single species, although a stabilising effect of algal diversity on biomass production was recently highlighted. However, addition of CO2 into polyalgal cultures requires a careful control of pH; performance of CO2 conversion, growth and carbon biomass production are affected by pH differently, depending on the species of microalgae. This study investigates the efficiency of CO2 conversion by natural marine algal assemblage cultivated in open, land-based raceways (4.5 m3, 10 m2), working as high rate algal ponds (HRAP). Ponds were enriched with nitrogen and phosphate, pure... |
| Tipo: Text |
Palavras-chave: Carbon yield; Microalgal diversity; PH; Predators. |
| Ano: 2020 |
URL: https://archimer.ifremer.fr/doc/00612/72403/71392.pdf |
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| Trombetta, Thomas; Vidussi, Francesca; Mas, Sébastien; Parin, David; Simier, Monique; Mostajir, Behzad. |
| Phytoplankton blooms are an important, widespread phenomenon in open oceans, coastal waters and freshwaters, supporting food webs and essential ecosystem services. Blooms are even more important in exploited coastal waters for maintaining high resource production. However, the environmental factors driving blooms in shallow productive coastal waters are still unclear, making it difficult to assess how environmental fluctuations influence bloom phenology and productivity. To gain insights into bloom phenology, Chl a fluorescence and meteorological and hydrological parameters were monitored at high-frequency (15 min) and nutrient concentrations and phytoplankton abundance and diversity, were monitored weekly in a typical Mediterranean shallow coastal system... |
| Tipo: Text |
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| Ano: 2019 |
URL: https://archimer.ifremer.fr/doc/00488/60004/63240.pdf |
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| Mannocci, Laura; Forget, Fabien; Travassos Tolotti, Mariana; Bach, Pascal; Bez, Nicolas; Demarcq, Herve; Kaplan, David; Sabarros, Philippe; Simier, Monique; Capello, Manuela; Dagorn, Laurent. |
| Fisheries observer programs represent the most reliable way to collect data on fisheries bycatch. However, their limited coverage leads to important data gaps that preclude bycatch mitigation at the basin scale. Habitat models developed from available fisheries observer programs offer a potential solution to fill these data gaps. We focus on tropical tuna purse seine fisheries (TTPSF) that span across the tropics and extensively rely on floating objects (FOBs) for catching tuna schools, leading to the bycatch of other species associated with these objects. Bycatch under floating objects is dominated by five species, including the vulnerable silky shark Carcharhinus falciformis and four bony fishes (oceanic triggerfish Canthidermis maculata, rainbow runner... |
| Tipo: Text |
Palavras-chave: Bycatch; Habitat modelling; Hotspots; Fisheries observer programs; Geographical extrapolation; Tropical oceans. |
| Ano: 2020 |
URL: https://archimer.ifremer.fr/doc/00662/77385/78986.pdf |
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| Derolez, Valerie; Bec, Beatrice; Munaron, Dominique; Fiandrino, Annie; Pete, Romain; Simier, Monique; Souchu, Philippe; Laugier, Thierry; Aliaume, Catherine; Malet, Nathalie. |
| Tipo: Text |
Palavras-chave: Recovery; Oligotrophication; Coastal lagoons; Urban inputs; Nutrients. |
| Ano: 2019 |
URL: https://archimer.ifremer.fr/doc/00478/58953/61574.pdf |
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| Le Fur, Ines; De Wit, Rutger; Plus, Martin; Oheix, Jocelyne; Derolez, Valerie; Simier, Monique; Malet, Nathalie; Ouisse, Vincent. |
| Since the mid-20th century, Mediterranean lagoons have been affected by eutrophication, leading to significant changes in primary producers. In the early 2000s, management actions have been implemented to reduce nutrient inputs with the aim to achieve a good ecological status as requested by the EU water framework directive. As a result of these actions, a sharp decline in nutrient loads has been recorded in several lagoons leading to an oligotrophication of the water column. The analyses of a long-term data set (1998-2015) of 21 polyhaline and euhaline lagoons with contrasting trophic status allowed us to infer a general scheme for the changes in macrophyte assemblages during the oligotrophication process. Placing hypertrophic and oligotrophic conditions... |
| Tipo: Text |
Palavras-chave: Submerged aquatic vegetation; Recovery; Nutrient reduction; Restoration; Long-term data series; Resilience; Regime shift; Coastal lagoon. |
| Ano: 2019 |
URL: https://archimer.ifremer.fr/doc/00474/58555/61110.pdf |
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