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668 results for “Mussels”
Data from: Growth and longevity of the endangered freshwater pearl mussel (Margaritifera margaritifera): Implications for conservation and management
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Data from: Adaptive genetic variation distinguishes Chilean blue mussels (Mytilus chilensis) from different marine environments
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Mussel bed community data for: Intraspecific variation in a marine predator changes intertidal community through effects on a foundation species
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Year 2000, mussel and snail surveys of tidal creeks on the Rowley River, Massacusetts.
This study was conducted during the Summer of 2000, by Governor's Academy high school science class students with their teacher Susan Olezsko-Zsuts to look at the distriibution of mussels and snails in a variety of tidal creeks off the Rowley River, Rowley and Ipswich Massachusetts.
Year 2001, mussel and snail surveys of tidal creeks on the Rowley River, Massacusetts.
This study was conducted during the Summer of 2001, by Governor's Academy high school science class students with their teacher Susan Olezsko-Zsuts to look at the distriibution of mussels and snails in a variety of tidal creeks off the Rowley River, Rowley and Ipswich Massachusetts.
Year 2002, mussel and snail surveys of tidal creeks on the Rowley River, Massacusetts.
This study was conducted during the Summer of 2002, by Governor's Academy high school science class students with their teacher Susan Olezsko-Zsuts to look at the distriibution of mussels and snails in a variety of tidal creeks off the Rowley River, Rowley and Ipswich Massachusetts.
The zebra mussel (Dreissena polymorpha) as a model organism for ecotoxicological studies: a prior 1H NMR spectrum interpretation of a whole body extract for metabolism monitoring.
<p>NMR data of the zebra mussel <em>Dreissena polymorpha</em> whole body polar extract metabolome</p> <p>- 1D <sup>1</sup>H annotated spectrum - 600 MHz</p> <p>- 2D <sup>1</sup>H-<sup>1</sup>H JRES spectrum - 600 MHz</p> <p>- 2D<sup>1</sup>H-<sup>1</sup>H COSY spectrum - 600 MHz</p> <p>- 2D<sup>1</sup>H-<sup>1</sup>H TOCSY spectrum - 600 MHz</p> <p>- 2D<sup>1</sup>H-<sup>13</sup>C HSQC spectrum - 600 MHz</p> <p>- 2D<sup>1</sup>H-<sup>13</sup>C HSQC spectrum - 800 MHz</p> <p>- 2D<sup>1</sup>H-<sup>31</sup>P HSQC spectrum - 800 MHz</p> <p>- <sup>1</sup>H annotated spectrum description tables (.xlsx)</p> <p>- Instructions for data visualization in Topspin</p>
Data from: A genome-wide approach to the phylogeography of the mussel Mytilus galloprovincialis in the Adriatic and the Black Seas
Connectivity between populations shapes the genetic structure of species being crucial for an effective management of environmental resources. Genetic approaches can provide indirect measures of connectivity, allowing the identification of genetically differentiated - unconnected - populations. In this study, we applied a 2b-RAD approach based on hundreds of polymorphic loci to provide the first detailed insight into the population genomics of the Mediterranean mussel Mytilus galloprovincialis in part of its native geographical range. We sampled 19 localities within the Mediterranean and Black Seas, and analyzed a total of 478 samples. We detected strong differences between the two seas, whereas no differences were found between samples from the Western and Central Mediterranean and within Western Mediterranean samples. In the Central Mediterranean a significant differentiation emerged comparing Central Adriatic samples with those from South Adriatic and Ionian Seas. Furthermore, an East-to-West genetic structuring was found in the Central Adriatic Sea, which was not present in the Southern Adriatic and Ionian Seas. These results possibly reflect the local oceanography, with a Middle Adriatic gyre unable to prevent genetic differentiation in this species, and a Southern Adriatic gyre that effectively mixes propagules in Southern areas. In the Black Sea, no signal of genetic structure was found, although samples were spaced at similar distances as in the Adriatic-Ionian area. Genetic connectivity patterns of M. galloprovincialis reveal peculiar species-specific features respect to other species with similar larval duration, suggesting caution in using genetic connectivity data of single species in defining conservation units. We recommend of using genetic connectivity data of many species representing a variety of life history traits, and we call for new investigations using high resolution population genomics, particularly in the Black Sea, to understand if areas separated by hundreds of kilometers can be considered genetically connected as mussels' data suggest. This information will be critical to ensure "a well-connected system of protected areas" according to Aichi Target 11 of the Convention on Biological Diversity.
Pre-introduction introgression contributes to parallel differentiation and contrasting hybridisation outcomes between invasive and native marine mussels
<p class="CxSpFirst">Non-native species experience novel selection pressures in introduced environments and may interbreed with native lineages. Species introductions therefore provide opportunities to investigate repeated patterns of adaptation and introgression across replicated contact zones. Here, we investigate genetic parallelism between multiple introduced populations of the invasive marine mussel, <i>Mytilus galloprovincialis</i>, in the absence (South Africa and California) and presence of hybridisation with a native congener (<i>Mytilus planulatus</i> in Batemans Bay and Sydney Harbour, Australia). Repeatability in post-introduction differentiation from native-range populations varied between genetically distinct Atlantic and Mediterranean lineages, with Atlantic-derived introductions displaying high differentiation (<i>maxFST</i>>0.4) and parallelism at outlier loci. Identification of long non-coding RNA transcripts (lncRNA) additionally allowed us to clarify that parallel responses are largely limited to protein-coding loci, with lncRNAs likely evolving under evolutionary constraints. Comparisons of independent hybrid zones revealed differential introgression most strongly in Batemans Bay, with an excess of <i>M. galloprovincialis</i> ancestry and resistance to introgression at loci differentiating parental lineages (<i>M. planulatus</i> and Atlantic <i>M. galloprovincialis</i>)<i>. </i>Additionally, contigs putatively introgressed with divergent alleles from a closely related species, <i>Mytilus edulis, </i>showed stronger introgression asymmetries compared to genome-wide trends and also diverged in parallel in both Atlantic-derived introductions. These results suggest that divergent demographic histories experienced by introduced lineages, including pre-introduction introgression, influences contemporary admixture dynamics. Our findings build on previous investigations reporting contributions of historical introgression to intrinsic reproductive architectures shared between marine lineages and illustrate that interspecific introgression history can shape differentiation between colonising populations and their hybridisation with native congeners.</p>
Data from: Repeatable patterns of small-scale spatial variation in intertidal mussel beds and their implications for responses to climate change
The interaction of ocean conditions and weather with small-scale physical features of a habitat can have profound effects on the experiences of individual organisms. On topographically complex shorelines, and particularly within dense aggregations of organisms such as mussel beds, a mosaic of environmental conditions can develop, and the resulting variation in conditions within the aggregation could drastically alter the performance of neighboring individuals. Using a suite of sensors mounted to individual Mytilus californianus mussels over two summer field deployments, we have characterized the temperature variation and valve gaping behavior differences found at two spatial scales: within a group separated by centimeters, and between groups of mussels located at the upper and lower extents of the natural mussel zone separated by meters. While temperature conditions near the lower edge of the mussel bed were generally more benign, temperature extremes were similar at both heights in the bed, and variation in body temperature among neighbors increased as the daily mean temperature increased. These patterns were similar across years despite a 3.8°C difference in mean air and seawater temperatures between years. Gaping behavior was also highly variable among individuals, though that variability diminished at the high end of the mussel bed where the total time mussels spent submerged was much more constrained. These data indicate that an individual mussel's physiological status and past history can be drastically different than those of its nearby neighbors, complicating our ability to characterize representative conditions within a habitat. These observations also provide for the possibility that the impacts of future climate change will be highly specific to certain individuals based on their relative exposure or protection within the mosaic. To address such possibilities, future work must examine the correlation between genotypic and physiological traits that determine performance and individuals' unique experiences in their disparate micro-environments.
Data from: Long-term population dynamics of dreissenid mussels (Dreissena polymorpha and D. rostriformis): a cross-system analysis
Dreissenid mussels (including the zebra mussel Dreissena polymorpha and the quagga mussel D. rostriformis) are among the world's most notorious invasive species, with large and widespread ecological and economic effects. However, their long‐term population dynamics are poorly known, even though these dynamics are critical to determining impacts and effective management. We gathered and analyzed 67 long‐term (>10 yr) data sets on dreissenid populations from lakes and rivers across Europe and North America. We addressed five questions: (1) How do Dreissena populations change through time? (2) Specifically, do Dreissena populations decline substantially after an initial outbreak phase? (3) Do different measures of population performance (biomass or density of settled animals, veliger density, recruitment of young) follow the same patterns through time? (4) How do the numbers or biomass of zebra mussels or of both species combined change after the quagga mussel arrives? (5) How does body size change over time? We also considered whether current data on long‐term dynamics of Dreissena populations are adequate for science and management. Individual Dreissena populations showed a wide range of temporal dynamics, but we could detect only two general patterns that applied across many populations: (1) Populations of both species increased rapidly in the first 1–2 yr after appearance, and (2) quagga mussels appeared later than zebra mussels and usually quickly caused large declines in zebra mussel populations. We found little evidence that combined Dreissena populations declined over the long term. Different measures of population performance were not congruent; the temporal dynamics of one life stage or population attribute cannot generally be accurately inferred from the dynamics of another. We found no consistent patterns in the long‐term dynamics of body size. The long‐term dynamics of Dreissena populations probably are driven by the ecological characteristics (e.g., predation, nutrient inputs, water temperature) and their temporal changes at individual sites rather than following a generalized time course that applies across many sites. Existing long‐term data sets on dreissenid populations, although clearly valuable, are inadequate to meet research and management needs. Data sets could be improved by standardizing sampling designs and methods, routinely collecting more variables, and increasing support.
Data from: Plasticity of thermal tolerance and its relationship with growth rate in juvenile mussels (Mytilus californianus)
Complex life cycles characterized by uncertainty at transitions between larval/juvenile and adult environments could favor irreversible physiological plasticity at such transitions. To assess whether thermal tolerance of intertidal mussels (Mytilus californianus) adjusts to post-settlement environmental conditions, we collected juveniles from their thermally buffered microhabitat from high and low-shore locations at cool (wave-exposed) and warm (wave-protected) sites. Juveniles were transplanted to unsheltered cages at the two low sites or placed in a common garden. Juveniles transplanted to the warm site for one month in summer had higher thermal tolerance, regardless of origin site. In contrast, common-garden juveniles from all sites had lower tolerance indistinguishable from exposed-site transplants. After six months in the field plus a common garden period, there was a trend for higher thermal tolerance at the protected site, while reduced thermal tolerance at both sites indicated seasonal acclimatization. Thermal tolerance and growth rate were inversely related after one but not six months; protected-site transplants were more tolerant but grew more slowly. In contrast to juveniles, adults from low-shore exposed and protected sites retained differences in thermal tolerance after common garden treatment in summer. Both irreversible and reversible forms of plasticity must be considered in organismal responses to changing environments.
Mussel-garden-fertilization-data: First release
<p>This is the first release of the data used in the "Can mussels fertilize their own garden? A benthocosm test of the long-term and short-term mussel excretion effects on the plankton" manuscript.</p>
Mass spectrometry imaging of metabolites in symbiont containing tissues of Bathymodiolus sp. mussels from a hydrothermal vent
<p>Molecules in <em>Bathymodiolus </em>sp. tissue. Distribution of five lipid metabolites in symbiont containing gill tissues was visualized using MALDI mass spectrometry imaging (red: high amounts, blue: low amounts of lipids).</p>
Imaging of metabolites in symbiont containing tissues of Bathymodiolus sp. mussels from a hydrothermal vent
<p>MALDI-MS laser spot size directly influences the resolution of ion-maps generated by MALDI-MS imaging. Here we show from top to bottom different ion maps from <em>Bathymodiolus sp</em>. tissue acquired with decreasing spot sizes (laser spot diameter indicated in each image). Details relevant to the scale of the bacterial symbionts become visible by using laser settings under 10 µm spot size.</p>
Mussells Pires et al, Converting an allocentric goal into an egocentric steering signal [Data]
<p>Data for <em><a href="https://doi.org/10.1038/s41586-023-07006-3">Converting an allocentric goal into an egocentric steering signal</a>. </em></p>
Data from: Optimizing detectability of the endangered fan mussel using eDNA and ddPCR
<p>Spatial and temporal monitoring of species threatened with extinction is of critical importance for conservation and ecosystem management. On the Mediterranean coast, the fan mussel (<em>Pinna nobilis</em>) is listed as critically endangered after suffering from a mass mortality event since 2016, leading to 100% mortality in most marine populations. Conventional monitoring for this macroinvertebrate is done using scuba, which is challenging in dense meadows or with low visibility. Here we developed an environmental DNA assay targeting the fan mussel and assessed the influence of several environmental parameters on the species detectability <em>in situ</em>. We developed and tested an eDNA molecular marker and collected 48 water samples in two sites at the Thau lagoon (France) with distinct fan mussel density, depths, and during two seasons (summer and autumn). Our marker can amplify fan mussel DNA but lacks specificity since it also amplifies a conspecific species (<em>Pinna rudis</em>). We successfully amplified fan mussel DNA from <em>in situ</em> samples with 46 positive samples (out of 48) using ddPCR, although the DNA concentrations measured were low over almost all samples. Deeper sampling depth slightly increased DNA concentrations, but no seasonal effect was found. We highlight a putative spawning event on a single summer day with much higher DNA concentration compared to all other samples. We present an eDNA molecular assay able to detect the endangered fan mussel and provide guidelines to optimize the sampling protocol to maximize detectability. Effective and non-invasive monitoring tools for endangered species are promising to monitor remaining populations and have the potential for ecological restoration or habitat recolonisation following a mass mortality event.</p>
Wooden steps to shallow depths: A new bathymodiolin mussel, Vadumodiolus teredinicola, inhabits shipworm burrows in an ancient submarine forest
<p>Large mussels of the mytilid subfamily Bathymodiolinae are common inhabitants of deep-sea hydrothermal vents and cold seeps, where gill-borne symbionts allow them to utilize energy-rich compounds such as hydrogen sulfide and methane to support abundant growth. This subfamily also includes smaller symbiont-bearing mussels found on deep-sea wood and organic deposits. Phylogenetic analyses suggest that wood association is ancestral to bathymodiolin evolution. This observation led to the "wooden steps" hypothesis, which proposed that wood and other large organic deposits have acted as evolutionary steppingstones, introducing the progenitors of the modern vent and seep Bathymodiolinae to their remote environments. Although this hypothesis implies an evolutionary trajectory from shallow to deep water, no bathymodiolin species that grows and reproduces at depths less than 100 m has yet been formally described. Here we describe a new bathymodiolin genus and species, <em>Vadumodiolus teredinicola, </em>found growing and reproducing at a depth of 18 m in uninhabited shipworm burrows in the remnants of an ancient submerged bald cypress forest off the coast of Alabama. These results demonstrate that the bathymodiolin radiation has not been limited to deep water and that specific association with wood has led to the successful invasion of both deep and shallow marine environments.</p>
Data: Responsiveness and habituation to repeated sound exposures and pulse trains in blue mussels
<p>Data abstract:</p> <p>Time series data on the valve gape behaviour of blue mussels (<em>Mytilus edulis</em>) that were exposured to sound treatments. Here, we provide the valve gape (time series data expressed in proportion open) of all mussels over the course of their trial and the timing of the sound exposures.</p> <p> </p> <p>Paper abstract:</p> <p>Anthropogenic sound has been shown to affect marine animals across taxa. However, bivalves and other invertebrates received limited attention and most studies across taxa focussed on immediate, rather than long-term, effects of sound. Most bivalves adopt a sessile or sedentary lifestyle and are therefore expected to be exposed to the same sounds for long periods or repeatedly. For this reason, bivalves are an especially relevant taxonomic group to study long-term effects of sound. In the current study, we examined whether blue mussels (<em>Mytilus edulis</em>) habituate to repeated sound exposures and whether they recover quicker from a single pulse exposure than from a pulse train. We equipped individual mussels with sensors to monitor valve gape and exposed them to repeated sound playback. We found that mussels responded to sound by partially closing their valves. This response was consistent and repeatable, but decayed over sequential exposures to the same sound stimulus, and was stronger again with exposure to a different sound. This pattern is clear evidence for acoustic habituation in a bivalve. Additionally, we found no differences in the initial response and recovery (time to return to baseline levels) between mussels that were exposed to single pulses and pulse trains. Our results therefore show that mussels are able to habituate to sound and suggest that mussels mostly respond to the onset of a pulse train. Future research is needed to determine whether mussels also habituate in situ to actual anthropogenic sound and whether a lack of a behavioural response also implies that other negative effects are also absent.</p> <p> </p> <p>Paper reference:</p> <p>Hubert, J., Booms, E., Witbaard, R., Slabbekoorn, H. (2022). Responsiveness and habituation to repeated sound exposures and pulse trains in blue mussels. <em>Journal of Experimental Marine Biology and Ecology</em>. 547, 151668. DOI: 10.1016/j.jembe.2021.151668</p>
Genome-wide sequencing identifies a thermal tolerance related synonymous mutation in the mussel Mytilisepta virgata
<p><span>The roles of 'silent' synonymous mutations for organisms adapting to stressfully thermal environments are of fundamental biological and ecological interests but poorly understood. To study whether synonymous mutations influence the thermal adaptation of animals to heat stress at specific microhabitats, a genome-wide genotype-phenotype association analysis was carried out in the black mussels <em>Mytilisepta virgata</em> inhabiting different microhabitats. A synonymous mutation of Ubiquitin-specific Peptidase 15 (<em>MvUSP15</em>) was significantly associated with the physiological upper thermal limit of the mussel. The individuals carrying GG genotype (the G-type) at the mutant locus owned significantly lower heat tolerance compared to the individuals carrying GA and AA genotype (the A-type). Furthermore, when heated to sublethal temperature, the G-type exhibited higher inter-individual variations in the <em>MvUSP15 </em>expression, especially for the mussels on the sun-exposed microhabitats. Taken together, a synonymous mutation in <em>MvUSP15 </em>can affect the gene expression profile and interact with microhabitat heterogeneity to influence thermal resistance. This integrative study sheds light on the ecological importance of adaptive synonymous mutations as an underappreciated genetic buffer against heat stress and emphasizes the importance of integrative studies with the consideration of genetic, physiological, and environmental heterogeneity at a microhabitat scale for evaluating and predicting the impacts of climate change.</span></p>
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Allen Brain Atlas
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