Articles de revues : « Mytilus edulis – Adaptation »

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RIGINOS, C., et C. W. CUNNINGHAM. « INVITED REVIEW : Local adaptation and species segregation in two mussel (Mytilus edulis × Mytilus trossulus) hybrid zones ». Molecular Ecology 14, n^o 2 (8 décembre 2004) : 381–400. http://dx.doi.org/10.1111/j.1365-294x.2004.02379.x.

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Bakhmet, Igor N., Natalia N. Fokina, Zinaida A. Nefedova et Nina N. Nemova. « Physiological–biochemical properties of blue mussel Mytilus edulis adaptation to oil contamination ». Environmental Monitoring and Assessment 155, n^o 1-4 (17 août 2008) : 581–91. http://dx.doi.org/10.1007/s10661-008-0457-5.

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Thyrring, Jakob, Amanda Bundgaard et Mikael K. Sejr. « Seasonal acclimation and latitudinal adaptation are of the same magnitude in Mytilus edulis and Mytilus trossulus mitochondrial respiration ». Polar Biology 40, n^o 9 (7 mars 2017) : 1885–91. http://dx.doi.org/10.1007/s00300-016-2064-1.

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Mestre, Nélia C., Sven Thatje et Paul A. Tyler. « The ocean is not deep enough : pressure tolerances during early ontogeny of the blue mussel Mytilus edulis ». Proceedings of the Royal Society B : Biological Sciences 276, n^o 1657 (4 novembre 2008) : 717–26. http://dx.doi.org/10.1098/rspb.2008.1376.

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Early ontogenetic adaptations reflect the evolutionary history of a species. To understand the evolution of the deep-sea fauna and its adaptation to high pressure, it is important to know the effects of pressure on their shallow-water relatives. In this study we analyse the temperature and pressure tolerances of early life-history stages of the shallow-water species Mytilus edulis . This species expresses a close phylogenetic relationship with hydrothermal-vent mussels of the subfamily Bathymodiolinae. Tolerances to pressure and temperature are defined in terms of fertilization success and embryo developmental rates in laboratory-based experiments. In M. edulis , successful fertilization under pressure is possible up to 500 atm (50.66 MPa), at 10, 15 and 20°C. A slower embryonic development is observed with decreasing temperature and with increasing pressure; principally, pressure narrows the physiological tolerance window in different ontogenetic stages of M. edulis , and slows down metabolism. This study provides important clues on possible evolutionary pathways of hydrothermal vent and cold-seep bivalve species and their shallow-water relatives. Evolution and speciation patterns of species derive mostly from their ability to adapt to variable environmental conditions, within environmental constraints, which promote morphological and genetic variability, often differently for each life-history stage. The present results support the view that a direct colonization of deep-water hydrothermal vent environments by a cold eurythermal shallow-water ancestor is indeed a possible scenario for the Mytilinae, challenging previous hypothesis of a wood/bone to seep/vent colonization pathway.

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Malachowicz, Magdalena, et Roman Wenne. « Mantle transcriptome sequencing of Mytilus spp. and identification of putative biomineralization genes ». PeerJ 6 (14 janvier 2019) : e6245. http://dx.doi.org/10.7717/peerj.6245.

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In molluscs, the shell secreted by mantle tissue during the biomineralization process is the first barrier against predators and mechanical damage. Changing environmental conditions, such as ocean acidification, influence shell strength and thus protection of the soft body within. Mussels are marine bivalves with important commercial and ecological value worldwide. Despite this importance, the proteins involved in the biomineralization and pigmentation processes in Mytilus spp. remain unclear, as does taxonomy of Mytilus taxa, though there have been many molecular studies. To further understanding in these areas, this study aimed to characterize and compare mantle transcriptomes of four mussel taxa using next generation sequencing. Mussels representing four taxa, were collected from several localities and RNA from mantle tissue was extracted. RNA sequences obtained were assembled, annotated and potential molecular markers, including simple sequence repeats (SSRs) and single nucleotide polymorphisms (SNPs) were identified. Candidate contigs putatively related to biomineralization and pigmentation processes were then selected and several transcripts were chosen for phylogenetic analyses from the Bivalvia class. Transcriptome comparisons between Mytilus taxa, including gene ontology (GO) enrichment analysis and orthologues identification were performed. Of assembled contigs, 46.57%, 37.28% and 17.53% were annotated using NCBI NR, GO and Kyoto Encyclopedia of Genes and Genomes databases, respectively. Potential SSRs (483) and SNPs (1,497) were identified. Results presented a total of 1,292 contigs putatively involved in biomineralization and melanogenesis. Phylogenetic analyses of α-carbonic anhydrase, chitinase and tyrosinase revealed complex evolutionary history and diversity of these genes, which may be a result of duplication events or adaptation to different environments in mussels and other bivalves. Enrichment analyses revealed GO terms associated with pH and thermal response in Mytilus edulis from the North Sea and M. galloprovincialis from the Mediterranean Sea. The phylogenetic analysis within the genus Mytilus revealed M. californianus and M. coruscus to be genetically more distant from the other taxa: M. trossulus, M. edulis, M. chilensis and M. galloprovincialis. This work represents the first mantle transcriptome comparison between Mytilus taxa and provides contigs putatively involved in biomineralization.

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de Vooys, C. G. N. « Adaptation to anaerobic metabolism in two mussel species, Mytilus edulis and Mytilus galloprovincialis, from the tidal zone at Arcachon Bay, France ». Netherlands Journal of Sea Research 21, n^o 1 (mars 1987) : 17–23. http://dx.doi.org/10.1016/0077-7579(87)90019-6.

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Fokina, N. N., T. R. Ruokolainen, I. N. Bakhmet et N. N. Nemova. « Lipid composition in response to temperature changes in blue mussels Mytilus edulis L. from the White Sea ». Journal of the Marine Biological Association of the United Kingdom 95, n^o 8 (17 avril 2015) : 1629–34. http://dx.doi.org/10.1017/s0025315415000326.

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Alterations of membrane lipid composition (cholesterol, phospholipids and their fatty acids) in response to various temperature changes were studied in blue mussels Mytilus edulis L. from the White Sea. Lipid composition changes after acute temperature stress, especially a temperature drop, included a significant reduction of the membrane phospholipid content directly (1 h) after return to the initial temperature, which was presumably a consequence of a non-specific stress reaction in the mussels. A longer recovery period (24 h) as well as long-term temperature acclimation (14 days) induced changes in gill fatty acid composition (for instance, a rise in phospholipid unsaturated fatty acids under low temperature impact), indicating ‘homeoviscous adaptation’ to maintain the membranes in response to temperature fluctuations. Moreover, the gill cholesterol level in mussels varied especially at long-term temperature exposure.

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Brom, Krzysztof Roman, et Krzysztof Szopa. « Morphological diversity of microstructures occurring in selected recent bivalve shells and their ecological implications ». Contemporary Trends in Geoscience 5, n^o 2 (1 décembre 2016) : 104–12. http://dx.doi.org/10.1515/ctg-2016-0008.

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Abstract Environmental adaptation of molluscs during evolution has led to form biomineral exoskeleton – shell. The main compound of their shells is calcium carbonate, which is represented by calcite and/or aragonite. The mineral part, together with the biopolymer matrix, forms many types of microstructures, which are differ in texture. Different types of internal shell microstructures are characteristic for some bivalve groups. Studied bivalve species (freshwater species – duck mussel (Anodonta anatina Linnaeus, 1758) and marine species – common cockle (Cerastoderma edule Linnaeus, 1758), lyrate Asiatic hard clam (Meretrix lyrata Sowerby II, 1851) and blue mussel (Mytilus edulis Linnaeus, 1758)) from different locations and environmental conditions, show that the internal shell microstructure with the shell morphology and thickness have critical impact to the ability to survive in changing environment and also to the probability of surviving predator attack. Moreover, more detailed studies on molluscan structures might be responsible for create mechanically resistant nanomaterials.

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Fokina, N. N., T. R. Ruokolainen, I. N. Bakhmet et N. N. Nemova. « Role of lipids in adaptation of mussels Mytilus edulis L. of the White Sea to rapid changes in temperature ». Doklady Biochemistry and Biophysics 457, n^o 1 (juillet 2014) : 155–57. http://dx.doi.org/10.1134/s1607672914040103.

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Bakhmet, Igor, Natalia Fokina et Tatiana Ruokolainen. « Changes of Heart Rate and Lipid Composition in Mytilus Edulis and Modiolus Modiolus Caused by Crude Oil Pollution and Low Salinity Effects ». Journal of Xenobiotics 11, n^o 2 (14 mai 2021) : 46–60. http://dx.doi.org/10.3390/jox11020004.

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Blue mussels, Mytilus edulis, inhabiting tidal zones, are naturally exposed to fluctuating environmental conditions (e.g., fluctuations in temperature and salinities), while horse mussels, Modiolus modiolus, live under relatively invariable shelf water conditions. The present investigation tested the hypothesis: blue mussels, in comparison to horse mussels, have an increased ability to tolerate the stress of pollution combined with low salinity. To assess the response of blue mussels and horse mussels to oil pollution at seawater salinities of 25 psu (normal) and 15 psu (low), we used a combination of heart rate and lipid composition as physiological and biochemical indicators, respectively. A sharp decrease in heart rate as well as important fluctuations in cardiac activity was observed under all oil concentrations. Modifications in the concentrations of the main membrane lipid classes (phosphatidylcholine, phosphatidylethanolamine, and cholesterol) and storage lipids (primarily triacylglycerols) in response to different crude oil concentrations were time- and dose-dependent. Both chosen indicators showed a high sensitivity to crude oil contamination. Furthermore, both bivalve species showed similar responses to oil pollution, suggesting a universal mechanism for biochemical adaptation to crude oil pollution.

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Thyrring, Jakob, Søren Rysgaard, Martin E. Blicher et Mikael K. Sejr. « Metabolic cold adaptation and aerobic performance of blue mussels (Mytilus edulis) along a temperature gradient into the High Arctic region ». Marine Biology 162, n^o 1 (19 novembre 2014) : 235–43. http://dx.doi.org/10.1007/s00227-014-2575-7.

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Fokina, N. N., T. R. Ruokolainen et N. N. Nemova. « The effect of intertidal habitat on seasonal lipid composition changes in blue mussels, Mytilus edulis L., from the White Sea ». Polar Record 54, n^o 2 (mars 2018) : 133–51. http://dx.doi.org/10.1017/s0032247418000293.

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ABSTRACTThe lipid composition of blue mussels Mytilus edulis L. living under different environmental conditions (in the intertidal zone and in aquaculture) was studied to detect origin-related differences in seasonal modifications of lipids, and their fatty acid composition in gills and digestive glands. In early May, the gills and digestive glands of intertidal mussels contained higher amounts of total lipids, chiefly phospholipids and sterols, which appear to perform a protective function as maintenance of membrane integrity. Seasonal modifications in lipid composition of both intertidal and aquaculture mussels were related to environmental factors (mainly low temperature), reproductive processes and food availability. We show that seasonal changes in membrane lipid composition of both intertidal and aquaculture mussels reflect the process of membrane lipid remodelling (namely changes in phosphatidylethanolamine proportion and in the fatty acid composition of phospholipids) required for homeoviscous adaptation in low-temperature conditions. In particular, the unsaturation index and chain fluidity index of phospholipids increased in gills and digestive glands of mussels collected in early May and in November. Similar seasonal changes in the triacylglycerol levels and its fatty acid composition were observed in gills and digestive glands of both intertidal and aquaculture mussels collected in late May and August.

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Smaal, Aad, Marnix van Stralen et Egbertha Schuiling. « The interaction between shellfish culture and ecosystem processes ». Canadian Journal of Fisheries and Aquatic Sciences 58, n^o 5 (1 mai 2001) : 991–1002. http://dx.doi.org/10.1139/f01-026.

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The carrying capacity of the Oosterschelde ecosystem for the production of mussels (Mytilus edulis) was evaluated before and after completion of a large-scale coastal engineering project in 1987. This project caused hydrodynamic and water-quality changes; hence, phytoplankton-species composition changed and phytoplankton turnover increased, but primary production remained the same. In the prebarrier period (19801986), condition of mussels showed a significant negative correlation with the annual shellfish standing stock and a significant positive correlation with the annual primary production. The system was exploited at maximum capacity. In the postbarrier period (19871997), the significant correlation between mussel condition and primary production remained, but there was no longer a negative correlation between standing stock and condition. This indicates overstocking, but yields were maintained. This was explained by (i) feedbacks of the mussels in the Oosterschelde ecosystemthrough their large filtration and nitrogen-regeneration capacity, increased phytoplankton turnover was induced; and (ii) adaptation to the new conditions by the shellfish farmers in their management of the mussel stocks. It was concluded that feedbacks by filter feeders and farmers have to be addressed in estimating the exploitation capacity of ecosystems.

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Fokina, N. N., Z. A. Nefedova, N. N. Nemova et V. V. Khalaman. « Modulating role of lipids and their fatty acids in adaptation of the White Sea mussels Mytilus edulis L. to environmental salinity change ». Journal of Evolutionary Biochemistry and Physiology 43, n^o 4 (août 2007) : 379–87. http://dx.doi.org/10.1134/s0022093007030023.

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Dixon, D. R., D. M. Lowe, P. I. Miller, G. R. Villemin, A. Colaço, R. Serrão-Santos et L. R. J. Dixon. « Evidence of seasonal reproduction in the Atlantic vent mussel Bathymodiolus azoricus, and an apparent link with the timing of photosynthetic primary production ». Journal of the Marine Biological Association of the United Kingdom 86, n^o 6 (décembre 2006) : 1363–71. http://dx.doi.org/10.1017/s0025315406014391.

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Here we present evidence of seasonal reproduction in the deep-sea vent mussel Bathymodiolus azoricus, a dominant member of the Mid-Atlantic Ridge (MAR) hydrothermal fauna in the Azores region. This is the first time that seasonal reproduction has been suggested for any deep-sea vent organism. This discovery was made possible by the use of novel, acoustically-retrievable cages, which allowed us to extend the frequency and temporal range of sampling that was previously limited to the summer months. The main spawning peak, at the Menez Gwen vent field (840 m) occurs in late December–January and shows a correlation with a winter–spring bloom in primary production in the euphotic zone. Our results suggest that this surface-derived material may act as both a food source for the dispersing mussel larvae and as a reproductive cue/supplementary nutritional source for the adult mussels. Further evidence of a dependence on photosynthetic inputs comes from the relationship between particulate feeding levels, which themselves correlate with the phytoplankton peak, and the amounts of storage tissue in the mantle, which ultimately gets converted into gonad. Thus, the pattern and energetics of reproduction in the Atlantic vent mussel B. azoricus closely resembles that found in the coastal mussel Mytilus edulis, which has been described as an adaptation for optimizing the timing of reproduction against a background of seasonally-varying food availability. This discovery emphasizes the complexity of the nutritional pathways found in some deep-sea chemosynthetic environments and highlights the need for more time-series studies.

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Belzile, Claude, et Michel Gosselin. « Free-living stage of the unicellular algae Coccomyxa sp. parasite of the blue mussel (Mytilus edulis) : Low-light adaptation, capacity for growth at a very wide salinity range and tolerance to low pH ». Journal of Invertebrate Pathology 132 (novembre 2015) : 201–7. http://dx.doi.org/10.1016/j.jip.2015.10.006.

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Waite, J. Herbert. « Catechol Oxidase in the Byssus of the Common Mussel,Mytilus EdulisL. » Journal of the Marine Biological Association of the United Kingdom 65, n^o 2 (mai 1985) : 359–71. http://dx.doi.org/10.1017/s0025315400050487.

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The common mussel inhabits an environment of fluctuating temperatures, salinities and water turbulence. To help cope with these stresses, mussels have evolved some extraordinary structural and biochemical adaptations. The production of the byssus is one such adaptation. The byssus is a complex array of threads and adhesive plaques that serves alternatively to attach the mussel to solid objects, to absorb shock, or to scale a vertical face (Waite, 1983a; Price, 1983). Because of its location outside the animal's living tissues, the byssus cannot count on the same kind of repair and remodelling offered to structures within the animal. The byssus is thus confronted with two conflicting demands. One is to be a mechanically dynamic structure shielding the animal against the buffeting impact of waves; the other is to be chemically inert towards the hydrolytic action of sea water and microbial enzymes.

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Holwerda, D. A., A. De Zwaan, J. H. Kluytmans et D. I. Zandee. « Metabolic Adaptations To Environmental Anoxia in the Intertidal Bivalve Mollusc Mytilus Edulis L ». Netherlands Journal of Zoology 36, n^o 3 (1985) : 322–43. http://dx.doi.org/10.1163/002829686x00117.

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Reynolds, Andy, Giacomo Santini, Guido Chelazzi et Stefano Focardi. « The Weierstrassian movement patterns of snails ». Royal Society Open Science 4, n^o 6 (juin 2017) : 160941. http://dx.doi.org/10.1098/rsos.160941.

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Weierstrassian Lévy walks are the archetypical form of random walk that do not satisfy the central limit theorem and are instead characterized by scale invariance. They were originally regarded as a mathematical abstraction but subsequent theoretical studies showed that they can, in principle, at least, be generated by chaos. Recently, Weierstrassian Lévy walks have been found to provide accurate representations of the movement patterns of mussels ( Mytilus edulis ) and mud snails ( Hydrobia ulvae ) recorded in the laboratory under controlled conditions. Here, we tested whether Weierstrassian Lévy walks and chaos are present under natural conditions in intertidal limpets Patella vulgata and P. rustica, and found that both characteristics are pervasive. We thereby show that Weierstrassian Lévy walks may be fundamental to how molluscs experience and interact with the world across a wide range of ecological contexts. We also show in an easily accessible way how chaos can produce a wide variety of Weierstrassian Lévy walk movement patterns. Our findings support the Lévy flight foraging hypothesis that posits that because Lévy walks can optimize search efficiencies, natural selection should have led to adaptations for Lévy walks.

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Knöbel, Loreen, Jennifer C. Nascimento-Schulze, Trystan Sanders, Dominique Zeus, Claas Hiebenthal, Francisco R. Barboza, Heiko Stuckas et Frank Melzner. « Salinity Driven Selection and Local Adaptation in Baltic Sea Mytilid Mussels ». Frontiers in Marine Science 8 (13 août 2021). http://dx.doi.org/10.3389/fmars.2021.692078.

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Baltic blue mussels can colonise and dominate habitats with far lower salinity (<10 psu) than other Mytilus congeners. Pervasive gene flow was observed between Western Baltic Mytilus edulis living at high salinity conditions and Eastern Baltic M. trossulus living at lower salinites, with highest admixture proportions within a genetic transition zone located at intermediate salinities (Darss Sill area). Yet, we do not understand the impacts of low salinity on larval performance, and how salinity may act as an early selective pressure during passive larval drift across salinity gradients. This study tested whether larvae originating from two different populations along the natural salinity cline in the Baltic Sea have highest fitness at their native salinities. Our results suggest that Eastern Baltic M. trossulus (Usedom, 7 psu) and Western Baltic M. edulis (Kiel, 16 psu) larvae display better performance (fitness components: growth, mortality, settlement success) when reared at their respective native salinities. This suggests that these populations are adapted to their local environment. Additionally, species diagnostic markers were used for genetic analyses of transition zone (Ahrenshoop, 11 psu) mussel larvae exposed to low salinity. This revealed that low salinity selection resulted in a shift towards allele frequencies more typical for Eastern Baltic M. trossulus. Thus, salinity acts as a selective pressure during the pre-settlement phase and can shape the genetic composition of Baltic mussel populations driving local adaptation to low salinity. Future climate change driven desalination, therefore, has the potential to shift the Baltic Sea hybrid gradient westward with consequences for benthic ecosystem structure.

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Thyrring, J., R. Tremblay et M. K. Sejr. « Local cold adaption increases the thermal window of temperate mussels in the Arctic ». Conservation Physiology 7, n^o 1 (1 janvier 2019). http://dx.doi.org/10.1093/conphys/coz098.

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Abstract Species expand towards higher latitudes in response to climate warming, but the pace of this expansion is related to the physiological capacity to resist cold stress. However, few studies exist that have quantified the level of inter-population local adaptation in marine species freeze tolerance, especially in the Arctic. We investigated the importance of cold adaptation and thermal window width towards high latitudes from the temperate to the Arctic region. We measured upper and lower lethal air temperatures (i.e. LT and LT50) in temperate and Arctic populations of blue mussels (Mytilus edulis), and analysed weather data and membrane fatty acid compositions, following emersion simulations. Both populations had similar upper LT (~38 °C), but Arctic mussels survived 4°C colder air temperatures than temperate mussels (−13 vs. −9°C, respectively), corresponding to an 8% increase in their thermal window. There were strong latitudinal relationships between thermal window width and local air temperatures, indicating Arctic mussels are highly adapted to the Arctic environment where the seasonal temperature span exceeds 60°C. Local adaptation and local habitat heterogeneity thus allow leading-edge M. edulis to inhabit high Arctic intertidal zones. This intraspecific pattern provides insight into the importance of accounting for cold adaptation in climate change, conservation and biogeographic studies.

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Corrochano-Fraile, Ana, Andrew Davie, Stefano Carboni et Michaël Bekaert. « Evidence of multiple genome duplication events in Mytilus evolution ». BMC Genomics 23, n^o 1 (2 mai 2022). http://dx.doi.org/10.1186/s12864-022-08575-9.

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Abstract Background Molluscs remain one significantly under-represented taxa amongst available genomic resources, despite being the second-largest animal phylum and the recent advances in genomes sequencing technologies and genome assembly techniques. With the present work, we want to contribute to the growing efforts by filling this gap, presenting a new high-quality reference genome for Mytilus edulis and investigating the evolutionary history within the Mytilidae family, in relation to other species in the class Bivalvia. Results Here we present, for the first time, the discovery of multiple whole genome duplication events in the Mytilidae family and, more generally, in the class Bivalvia. In addition, the calculation of evolution rates for three species of the Mytilinae subfamily sheds new light onto the taxa evolution and highlights key orthologs of interest for the study of Mytilus species divergences. Conclusions The reference genome presented here will enable the correct identification of molecular markers for evolutionary, population genetics, and conservation studies. Mytilidae have the capability to become a model shellfish for climate change adaptation using genome-enabled systems biology and multi-disciplinary studies of interactions between abiotic stressors, pathogen attacks, and aquaculture practises.

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« The adaptation of enzymes to temperature : catalytic characterization of glucosephosphate isomerase homologues isolated from Mytilus edulis and Isognomon alatus, bivalve molluscs inhabiting different thermal environments. » Molecular Biology and Evolution, mai 1985. http://dx.doi.org/10.1093/oxfordjournals.molbev.a040346.

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