bascule de visibilité Search & Display Options

Tout Sélectionner    Désélectionner
 |   | 
Détails
   print
  Enregistrements Liens
Auteur Zilius, M.; Bartoli, M.; Bresciani, M.; Katarzyte, M.; Ruginis, T.; Petkuviene, J.; Lubiene, I.; Giardino, C.; Bukaveckas, P.A.; De Wit, R.; Razinkovas-Baziukas, A. url  doi
openurl 
  Titre Feedback Mechanisms Between Cyanobacterial Blooms, Transient Hypoxia, and Benthic Phosphorus Regeneration in Shallow Coastal Environments Type Article scientifique
  Année 2014 Publication Revue Abrégée (up) Estuaries and Coasts  
  Volume 37 Numéro 3 Pages 680-694  
  Mots-Clés baltic sea; chesapeake bay; curonian lagoon; Cyanobacterial blooms; ecosystem metabolism; Estuary; gulf; Hypoxia; Net; nutrient limitation; Oxygen; Phosphorus release; respiration; satellite data; temporal variability  
  Résumé We investigated the dissolved oxygen metabolism of the Curonian Lagoon (Baltic Sea) to assess the relative contributions of pelagic and benthic processes to the development of transient hypoxic conditions in shallow water habitats. Metabolism measurements along with the remote sensing-derived estimates of spatial variability in chlorophyll a were used to evaluate the risk of hypoxia at the whole lagoon level. Our data demonstrate that cyanobacterial blooms strongly inhibit light penetration, resulting in net heterotrophic conditions in which pelagic oxygen demand exceeds benthic oxygen demand by an order of magnitude. The combination of bloom conditions and reduced vertical mixing during calm periods resulted in oxygen depletion of bottom waters and greater sediment nutrient release. The peak of reactive P regeneration (nearly 30 mu mol m(-2) h(-1)) coincided with oxygen depletion in the water column, and resulted in a marked drop of the inorganic N:P ratio (from > 40 to < 5, as molar). Our results suggest a strong link between cyanobacterial blooms, pelagic respiration, hypoxia, and P regeneration, which acts as a feedback in sustaining algal blooms through internal nutrient cycling. Meteorological data and satellite-derived maps of chlorophyll a were used to show that nearly 70 % of the lagoon surface (approximately 1,000 km(2)) is prone to transient hypoxia development when blooms coincide with low wind speed conditions.  
  Adresse  
  Auteur institutionnel Thèse  
  Editeur Lieu de Publication Éditeur  
  Langue English Langue du Résumé Titre Original  
  Éditeur de collection Titre de collection Titre de collection Abrégé  
  Volume de collection Numéro de collection Edition  
  ISSN 1559-2723 ISBN Médium  
  Région Expédition Conférence  
  Notes <p>ISI Document Delivery No.: AF0SM<br/>Times Cited: 1<br/>Cited Reference Count: 66<br/>Zilius, Mindaugas Bartoli, Marco Bresciani, Mariano Katarzyte, Marija Ruginis, Tomas Petkuviene, Jolita Lubiene, Irma Giardino, Claudia Bukaveckas, Paul A. de Wit, Rutger Razinkovas-Baziukas, Arturas<br/>European Union Structural Funds project “Postdoctoral Fellowship Implementation in Lithuania”; Fulbright Fellowship; ESA project [AO-553]; CYAN-IS-WAS (Ministero dell'Istruzione dell'Universita e della Ricerca, Science and technological of Sweden); CLAM-PHYM (Italian Space Agency) [ASI I/015/11/0]<br/>Mindaugas Zilius was supported by a postdoctoral fellowship funded by the European Union Structural Funds project “Postdoctoral Fellowship Implementation in Lithuania.” Paul Bukaveckas was supported by a Fulbright Fellowship during his residence at Klaipeda University. MERIS data were made available through the ESA project AO-553 (MELINOS). This study was co-funded by CYAN-IS-WAS (Ministero dell'Istruzione dell'Universita e della Ricerca, Science and technological cooperation between Italy and the Kingdom of Sweden) and CLAM-PHYM (Italian Space Agency, contract ASI I/015/11/0) projects. We gratefully thank the Lithuanian Hydrometeorological Service of the Ministry of Environment for providing meteorological data. We also gratefully thank three anonymous reviewers for valuable comments which improved the quality of the manuscript.<br/>Springer<br/>New york</p> Approuvé pas de  
  Numéro d'Appel MARBEC @ alain.herve @ collection 1184  
Lien permanent pour cet enregistrement
 

 
Auteur Ahmedou Salem, M.V.; van der Geest, M.; Piersma, T.; Saoud, Y.; van Gils, J.A. doi  openurl
  Titre Seasonal changes in mollusc abundance in a tropical intertidal ecosystem, Banc d’Arguin (Mauritania): testing the ‘shorebird depletion’ hypothesis Type Article scientifique
  Année 2014 Publication Revue Abrégée (up) Estuarine Coastal and Shelf Science  
  Volume 136 Numéro Pages 26-34  
  Mots-Clés  
  Résumé  
  Adresse  
  Auteur institutionnel Thèse  
  Editeur Lieu de Publication Éditeur  
  Langue Langue du Résumé Titre Original  
  Éditeur de collection Titre de collection Titre de collection Abrégé  
  Volume de collection Numéro de collection Edition  
  ISSN ISBN Médium  
  Région Expédition Conférence  
  Notes Approuvé pas de  
  Numéro d'Appel MARBEC @ alain.herve @ 943 collection 1366  
Lien permanent pour cet enregistrement
 

 
Auteur Morat, F.; Letourneur, Y.; Blamart, D.; Pecheyran, C.; Darnaude, A.M.; Harmelin-Vivien, M. url  doi
openurl 
  Titre Offshore-onshore linkages in the larval life history of sole in the Gulf of Lions (NW-Mediterranean) Type Article scientifique
  Année 2014 Publication Revue Abrégée (up) Estuarine Coastal and Shelf Science  
  Volume 149 Numéro Pages 194-202  
  Mots-Clés age; bristol channel; common sole; fish otoliths; isotope ratios; microchirus-variegatus; nursery grounds; otolith microchemistry; Rhone River; river flood event; sea; seasonal-variation; shape-analysis; Solea solea; stable isotope  
  Résumé Understanding individual dispersion from offshore natal areas to coastal nurseries during pelagic larval life is especially important for the sustainable management of exploited marine fish species. For several years, the hatching period, the larval life duration, the average growth rate and the otolith chemical composition (delta C-13, delta O-18, Sr:Ca and Ba:Ca) during the larval life were studied for young of the year (YOY) of sole collected in three main nurseries of the Gulf of Lions (GoL) (Thau, Mauguio and Berre). We investigated the spatial variation in the origin of the sole larvae which colonised the nurseries around the GoL, and whether temporal differences in environmental conditions during this life stage affected growth and larval life duration. The hatching period ranges from October to March, depending on year and site. Average ages at metamorphosis varied between 43 and 50 days, with the lowest and highest values consistently found for Mauguio and Berre, respectively. Otolith growth rates ranged between 2.7 and 3.2 mu m d(-1), with the lowest values in Thau and Mauguio and the highest in Berre. Otolith chemical composition during the larval life also varied, suggesting contrasted larval environmental histories in YOY among nurseries. In fishes from Berre and Mauguio, larval life was more influenced by the Rhone River, showing consistently higher larval Ba:Ca ratios (10/23 mu mol mol(-1)) and lower delta C-13 (-6.5/-6.1 parts per thousand) and delta O-18 values (-1.6/0.1 parts per thousand) than for Thau (with Ba:Ca ratios < 8 mu mol mol(-1), delta C-13 similar to-2.3 parts per thousand and delta O-18 similar to 1.5 parts per thousand). Differences in larval otolith composition were observed for 2004, with higher Ba:Ca and lower delta C-13 and delta O-18 values than in the two other years. These differences were explained by changes in composition and chemical signatures of water masses after an exceptional flooding event of the Rhone River in late 2003. (C) 2014 Elsevier Ltd. All rights reserved.  
  Adresse  
  Auteur institutionnel Thèse  
  Editeur Lieu de Publication Éditeur  
  Langue English Langue du Résumé Titre Original  
  Éditeur de collection Titre de collection Titre de collection Abrégé  
  Volume de collection Numéro de collection Edition  
  ISSN 0272-7714 ISBN Médium  
  Région Expédition Conférence  
  Notes <p>ISI Document Delivery No.: AW3ZF<br/>Times Cited: 0<br/>Cited Reference Count: 75<br/>Morat, Fabien Letourneur, Yves Blamart, Dominique Pecheyran, Christophe Darnaude, Audrey M. Harmelin-Vivien, Mireille<br/>PACA Region; Total foundation; Agence de l'Eau Rhone Mediterranee Corse; French National Research Agency (ANR) through the young scientist program LAGUNEX [07-JCJC-0135]<br/>Fabien Morat was funded by Ph.D stipends from the PACA Region, the Total foundation, and the Agence de l'Eau Rhone Mediterranee Corse and by the French National Research Agency (ANR) through the young scientist program LAGUNEX (07-JCJC-0135). We thank Jean-Pierre Quignard and fishermen for Thau and Mauguio lagoons samples, and Gipreb members for Berre lagoon samples. The authors express their thanks to Christian Marschal and Chantal Mahe-Bezac for their technical help in age estimation, Olivier Radakovitch for elemental data of the Rhone River waters, and Michael Paul, a native English speaker scientific translator, for language correction. We are grateful to anonymous reviewers for their valuable suggestions and criticisms that have enabled us to improve the article.<br/>Academic press ltd- elsevier science ltd<br/>London</p> Approuvé pas de  
  Numéro d'Appel MARBEC @ alain.herve @ collection 1169  
Lien permanent pour cet enregistrement
 

 
Auteur Bodin, N.; Lucas, V.; Dewals, P.; Adeline, M.; Esparon, J.; Chassot, E. url  doi
openurl 
  Titre Effect of brine immersion freezing on the determination of ecological tracers in fish Type Article scientifique
  Année 2014 Publication Revue Abrégée (up) European Food Research and Technology  
  Volume 238 Numéro 6 Pages 1057-1062  
  Mots-Clés Brine immersion; Fatty acids; Frozen storage; Large pelagic fish; Persistent organic pollutants; Stable isotopes  
  Résumé The use of a multi-ecological tracer approach provides valuable and complementary insights to investigate the complex biology and ecology of large pelagic fish. Brine immersion freezing is the most common preservation technique used onboard for large fish to be frozen whole until they are delivered for sale and processing. We evaluated the effect of brine freezing on lipid and fatty acid composition, C and N stable isotope ratios, and organochlorine contaminant levels of yellowfin tuna (Thunnus albacares) and skipjack tuna (Katsuwonus pelamis). Fresh tunas were stored in a saturated sodium chlorine brine immersion tank maintained at -20 A degrees C for 6 weeks, and ecological tracers were analysed on dorsal muscle samples collected before and after brine freezing. No significant effect of the fish preservation technique was found except for delta N-15 whose signatures slightly increased after a 6-week period of brine immersion. Because N isotopic shift was close to the analytical precision and probably related to a higher risk of salt penetration in small tunas with abraded skin, we consider our results as conservative and conclude that ecological tracers can indeed be analysed on brine-freezing-preserved tunas.  
  Adresse  
  Auteur institutionnel Thèse  
  Editeur Lieu de Publication Éditeur  
  Langue Langue du Résumé Titre Original  
  Éditeur de collection Titre de collection Titre de collection Abrégé  
  Volume de collection Numéro de collection Edition  
  ISSN 1438-2377 ISBN Médium  
  Région Expédition Conférence  
  Notes Approuvé pas de  
  Numéro d'Appel LL @ pixluser @ collection 353  
Lien permanent pour cet enregistrement
 

 
Auteur Anderson, P.S.L.; Claverie, T.; Patek, S.N. url  doi
openurl 
  Titre Levers And Linkages: Mechanical Trade-Offs In A Power-Amplified System Type Article scientifique
  Année 2014 Publication Revue Abrégée (up) Evolution  
  Volume 68 Numéro 7 Pages 1919-1933  
  Mots-Clés amplification; Biomechanics; comparative methods; evolution; kinematic transmission; labrid fishes; mantis shrimp; modularity; morphology; phylogenetic; stomatopods; strike; trade-offs  
  Résumé Mechanical redundancy within a biomechanical system (e. g., many-to-one mapping) allows morphologically divergent organisms to maintain equivalent mechanical outputs. However, most organisms depend on the integration of more than one biomechanical system. Here, we test whether coupled mechanical systems follow a pattern of amplification (mechanical changes are congruent and evolve toward the same functional extreme) or independence (mechanisms evolve independently). We examined the correlated evolution and evolutionary pathways of the coupled four-bar linkage and lever systems in mantis shrimp (Stomatopoda) ultrafast raptorial appendages. We examined models of character evolution in the framework of two divergent groups of stomatopods-“smashers” (hammer-shaped appendages) and “spearers” (bladed appendages). Smashers tended to evolve toward force amplification, whereas spearers evolved toward displacement amplification. These findings show that coupled biomechanical systems can evolve synergistically, thereby resulting in functional amplification rather than mechanical redundancy.  
  Adresse  
  Auteur institutionnel Thèse  
  Editeur Lieu de Publication Éditeur  
  Langue English Langue du Résumé Titre Original  
  Éditeur de collection Titre de collection Titre de collection Abrégé  
  Volume de collection Numéro de collection Edition  
  ISSN 0014-3820 ISBN Médium  
  Région Expédition Conférence  
  Notes <p>ISI Document Delivery No.: AL3TK<br/>Times Cited: 1<br/>Cited Reference Count: 40<br/>Anderson, Philip S. L. Claverie, Thomas Patek, S. N.<br/>National Science Foundation [IOS-1149748]<br/>The authors would like to thank S. Price for extensive assistance on phylogenetic comparative methods and L. Revell for help and advice for using his Phytools package for R. We would also like to thank M. Porter, M. Rosario, P. Green, S. Cox, and K. Kagaya for helpful discussions on stomatopod biology as well as two anonymous reviewers for their insightful comments, which have greatly improved the quality of this article. We also thank K. Reed (National Museum of Natural History, Washington, DC) and S. Keable (Australian Museum of Natural History, Sydney) for access to their specimen collections. This work was funded by the National Science Foundation (IOS-1149748) to SNP. The authors declare no conflict of interest.<br/>Wiley-blackwell<br/>Hoboken</p> Approuvé pas de  
  Numéro d'Appel MARBEC @ alain.herve @ collection 1156  
Lien permanent pour cet enregistrement
Tout Sélectionner    Désélectionner
 |   | 
Détails
   print

Save Citations:
Export Records: