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Auteur Doan, T.T.; Bouvier, C.; Bettarel, Y.; Bouvier, T.; Henry-des-Tureaux, T.; Janeau, J.L.; Lamballe, P.; Nguyen, B.V.; Jouquet, P.
Titre Influence of buffalo manure, compost, vermicompost and biochar amendments on bacterial and viral communities in soil and adjacent aquatic systems Type Article scientifique
Année 2014 Publication Revue Abrégée (up) Applied Soil Ecology
Volume 73 Numéro Pages 78-86
Mots-Clés Mesocosms; Organic fertilization; Soil; Virus; bacteria; water
Résumé Vermicompost and biochar amendments are management practices which may contribute to sustainable agroecosystems by reducing dependence on inorganic fertilizers. However, little is known about their impacts on soil microorganisms and their transfer and evolution in connected aquatic systems. The aim of this study was to determine the influence of organic manure (buffalo manure, compost or vermicompost) and biochar amendments on bacterial and viral properties in soil and water. A three year experiment was carried out with terrestrial mesocosms which were used to test the effect of organic matter amendment on maize growth. In the last year of the experiment, runoff and infiltration waters from the terrestrial mesocosms were transferred to aquatic mesocosms. Organic fertilization improved soil properties (higher C, N content and pH H 2 O ) and as a consequence increased soil bacterial and viral abundance. Bacterial diversity (Shannon ‘H’ and richness ‘S’ indices calculated from DGGE fingerprint) was also enhanced after the continuous application of organic amendments. Compared with compost, vermicompost reduced viral abundance and S but similar H and bacterial abundance were observed. The pH H 2 O , C content and bacterial and viral abundance increased in the aquatic mesocosms following organic fertilization. As a consequence, bacterial and viral diversity also increased in the water, although no differences were found between compost and vermicompost. Biochar increased soil bacterial abundance for the mineral fertilizer treatment but did not influence bacterial and viral abundance in water. However, the combination of biochar and vermicompost led to an increase of viruses in soil and a reduction of bacteria in water. Similarity dendrograms from the DGGE banding patterns showed that the structure of bacterial communities was mainly influenced by the fertilizer treatments in soil but by the presence of biochar in water. In conclusion, this study demonstrated that the nature of the organic amendment has important consequences on both soil and water microbial abundance and diversity.
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ISSN 0929-1393 ISBN Médium
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Auteur Walker, T.R.; Grant, J.; Weise, A.M.; McKindsey, C.W.; Callier, M.D.; Richard, M.
Titre Influence of suspended mussel lines on sediment erosion and resuspension in Lagune de la Grande Entree, Iles-de-la-Madeleine, Quebec, Canada Type Article scientifique
Année 2014 Publication Revue Abrégée (up) Aquaculture
Volume 433 Numéro Pages 450-457
Mots-Clés Aquaculture; Biodeposits; biogeochemical fluxes; culture; dynamics; intertidal cohesive sediments; lagoon; Mytilus; Mytilus edulis; Particle; rates; Resuspension; Sediment erosion; Shear velocity; size; stability
Résumé Downward fluxes of organically rich biodeposits under suspended mussel lines can cause benthic impacts such as changes in benthic community structure or microbial mat production. Quantifying sediment erosion in these coastal ecosystems is important for understanding how fluxes of organic matter and mussel biodeposits contribute to benthic pelagic coupling. Critical shear velocity (u(crit)*(t)), erosion rates and particle size distributions of resuspended sediment were measured at four stations distributed along a transect perpendicular to a mussel farm in Lagune de la Grande Entree, Iles-de-la-Madeleine (Quebec, Canada). Stations were selected underneath the outer-most mussel line (0 m) and at distances of 15,30 m and at a reference station (500 m) further along the transect. Shear velocity was measured using a calibrated portable Particle Erosion Simulator, also referred to as the BEAST (Benthic Environmental Assessment Sediment Tool). Undisturbed sediment cores obtained by divers were exposed to shear stress to compare differences between stations. Erosion sequences indicated no significant differences in u(crit)* between stations, but there were significant differences in erosion rates beneath mussel lines compared to other stations. Erosion rates were the highest in cores from beneath mussel lines, but paradoxically had the lowest u(crit)* Mean erosion rates at u*crit varied between 25 and 47 g m(-2) min(-1) and critical erosion thresholds varied between 1.58 and 1.73 cm s(-1), which compare with intensive mussel culture sites elsewhere in eastern Canada. Significant differences existed in biotic and abiotic properties of sediments which could explain variation in maximum erosion rates within and between stations. Particle sizes measured by videography of resuspended sediment at different shear velocities ranged from 02 to 3.0 mm. Quantifying sediment erosion from intact marine sediments helps to improve our mechanistic understanding of these processes, and the BEAST further contributes to predictive capability in benthic pelagic coupling modeling. (C) 2014 Elsevier B.V. All rights reserved.
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ISSN 0044-8486 ISBN Médium
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Notes <p>ISI Document Delivery No.: AQ1GH<br/>Times Cited: 0<br/>Cited Reference Count: 39<br/>Walker, Tony R. Grant, Jon Weise, Andrea M. McKindsey, Christopher W. Callier, Myriam D. Richard, Marion<br/>Natural Sciences and Engineering Research Council of Canada (NSERC); Aquaculture Collaborative Research and Development Program (ACRDP); Societe de Development de l'Industrie Maricole (SODIM); Fisheries and Oceans Canada<br/>We thank MAPAQ and B. Hargrave for the collaboration and C. Eloquin and associates for the permission to use their site. Funding was provided by the Aquaculture Collaborative Research and Development Program (ACRDP), the Societe de Development de l'Industrie Maricole (SODIM) and the Fisheries and Oceans Canada. We thank B. Schofield and M. Merrimen for the fabrication of the BEAST which formed part of the equipment necessary for the Canadian Arctic Shelves Exchange Study (CASES), a Research Network funded by the Natural Sciences and Engineering Research Council of Canada (NSERC).<br/>Elsevier science bv<br/>Amsterdam</p> Approuvé pas de
Numéro d'Appel MARBEC @ alain.herve @ collection 1180
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Auteur Chong-Robles, J.; Charmantier, G.; Boulo, V.; Lizárraga-Valdéz, J.; Enríquez-Paredes, L.M.; Giffard-Mena, I.
Titre Osmoregulation pattern and salinity tolerance of the white shrimp Litopenaeus vannamei (Boone, 1931) during post-embryonic development Type Article scientifique
Année 2014 Publication Revue Abrégée (up) Aquaculture
Volume 422–423 Numéro Pages 261-267
Mots-Clés Crustacean; Hypo–hyper osmoregulation; Larvae; Osmotic pressure; Osmotic stress; survival
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Numéro d'Appel MARBEC @ isabelle.vidal-ayouba @ collection 756
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Auteur Li, X.; Blancheton, J.-P.; Liu, Y.; Triplet, S.; Michaud, L.
Titre Effect of oxidation-reduction potential on performance of European sea bass (Dicentrarchus labrax) in recirculating aquaculture systems Type Article scientifique
Année 2014 Publication Revue Abrégée (up) Aquaculture International
Volume 22 Numéro 4 Pages 1263-1282
Mots-Clés culture-system; disinfection; european sea bass; Orp; ozonated; Ozone; performance; Ras; responses; rock lobster; salinity; seawater; sublethal exposure; trout oncorhynchus-mykiss; water-quality
Résumé The direct impact of oxidation-reduction potential (ORP) on fish welfare and water quality in marine recirculating aquaculture systems (RAS) is poorly documented. In this study, the effects of the fish size (S-1, S-2, S-3) and ORP level (normal, four successive levels) on the performance of European sea bass (Dicentrarchus labrax) were investigated. Three size fish were distributed into two RAS (RAS and RAS O-3). Ozone was injected into RAS O-3 to increase the ORP level. The ORP was stabilized to four successive levels: 260-300, 300-320, 320-350, and 300-320 mV in fish tanks during four periods (P1-4). At the last day of each period, the hematological parameters, plasma protein and mortality of sea bass were analyzed. Two-way ANOVA revealed that several hematological parameters, including pH, hematocrit, concentrations of oxygen, carbon dioxide, glucose (Glu), ionized calcium, kalium, and hemoglobin, were significantly influenced by the increased ORP levels over the experimental period. The alteration in blood Glu and plasma protein concentration showed that ORP around 300-320 mV started to stress sea bass. Once the ORP exceeded 320 mV in the tanks during the P-3 period, mortality occurred even when total residual oxidants/ozone-produced oxidants was only 0.03-0.05 mg L-1 in the fish tanks. At the same time, plasma protein decreased notably due to appetite depression. After the decrease in ORP during the P-4 period, mortality continued. In conclusion, the results strongly suggest that for European sea bass in RAS, the ORP should not exceed 320 mV in the tanks. Once ozonation damaged fish, the effect seemed to be irreversible. However, how ORP affected related hematological parameters still need the further investigations.
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ISSN 0967-6120 ISBN Médium
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Notes <p>ISI Document Delivery No.: AL4MD<br/>Times Cited: 1<br/>Cited Reference Count: 35<br/>Li, Xian Blancheton, Jean-Paul Liu, Ying Triplet, Sebastien Michaud, Luigi<br/>National Natural Science Foundation of China [41306152]; National Science and Technology Support Program [2011BAD13B04]<br/>The authors would thank all the participants from the Ifremer Palavas station: Cyrille Przybyla, Myriam Callier, and Thibault Geoffroy for their contribution to the experiment and analyses. This work was supported by the National Natural Science Foundation of China (Grant No. 41306152) and National Science and Technology Support Program (Grant No. 2011BAD13B04).<br/>Springer<br/>Dordrecht</p> Approuvé pas de
Numéro d'Appel MARBEC @ alain.herve @ collection 1168
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Auteur Przybyla, C.; Fievet, J.; Callier, M.; Blancheton, J.-P.
Titre Effect of dietary water content on European sea bass (Dicentrarchus labrax) growth and disease resistance Type Article scientifique
Année 2014 Publication Revue Abrégée (up) Aquat. Living Resour.
Volume 27 Numéro 2 Pages 73-81
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Numéro d'Appel MARBEC @ alain.herve @ collection 1173
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