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5 results for “Saccostrea glomerata”
Saccostrea glomerata (Sydney Rock Oyster) - Meta Analysis Dataset Repository
<h1>Saccostrea glomerata (Sydney Rock Oyster) - Meta Analysis Dataset Repository:</h1> <h2>Dataset used to do 8 separate meta-analyses on the following topics for <em>Saccostrea glomerata</em> (Sydney Rock Oyster):</h2> <p>1. Ocean acidification and size</p> <p>2. Ocean acidification and mortality</p> <p>3. Ocean warming and size</p> <p>4. Ocean warming and mortality</p> <p>5. Transgenerational exposure to ocean acidification and size</p> <p>6. Transgenerational exposure to ocean acidification and mortality</p> <p>7. Transgenerational exposure to ocean warming effect and size</p> <p>8. Transgenerational exposure to ocean warming and mortality</p> <h3><strong>Dataset contains:</strong></h3> <ul> <li>Original code and all associated data files in order to reproduce the work within the "Code and Formatted Data" Folder.</li> <li>Datasheets containing the raw data extracted from the papers identified during the literature searches </li> </ul> <h3>Description of the data and file structure</h3> <ul> <li>R-Markdown file contains the original code required to reproduce the results outlined in this paper</li> <li>All datasheets appended with "_Formatted_For_Effect_Sizes" were used to generate the effect sizes required for the meta-analysis</li> <li>All datasheets appended with "_Extracted_Raw_Data" are the raw data extracted from the papers identified during the literature searches</li> </ul> <h3><strong>Abbreviations</strong></h3> <ul> <li>OA - Ocean Acidification</li> <li>Temp - Temperature</li> <li>Transgen - Transgenerational Exposure</li> <li>Mort - Mortality</li> </ul> <h2>Abstract</h2> <div>Global oceans are warming and acidifying because of increasing greenhouse gas emissions which are anticipated to have cascading impacts on marine ecosystems and organisms, especially those essential for biodiversity and food security. Despite this concern, there remains some scepticism about the reproducibility and reliability of research done to predict the future climate change impacts on marine organisms. Here we present meta-analyses of over two decades of research on the climate change impacts on an ecologically and economically valuable Sydney rock oyster, <em>Saccostrea glomerata</em>. We confirm with high confidence that ocean acidification has a significant impact on mortality and size of <em>S. glomerata,</em> that ocean warming has a significant impact on mortality, but not size, and transgenerational exposure has positive benefits to offspring. These meta-analyses reveal impacts of climate change on an ecologically and economically significant oyster species and recommends solutions for experimental designs to ensure sustainability of this iconic oyster. </div>
Data from: Adult exposure to ocean acidification is maladaptive for larvae of the Sydney rock oyster Saccostrea glomerata in the presence of multiple stressors
Parental effects passed from adults to their offspring have been identified as a source of rapid acclimation that may allow marine populations to persist as our surface oceans continue to decrease in pH. Little is known, however, whether parental effects are beneficial for offspring in the presence of multiple stressors. We exposed adults of the oyster Saccostrea glomerata to elevated CO2 and examined the impacts of elevated CO2 (control = 392; 856 µatm) combined with elevated temperature (control = 24; 28°C), reduced salinity (control = 35; 25) and reduced food concentration (control = full; half diet) on their larvae. Adult exposure to elevated CO2 had a positive impact on larvae reared at elevated CO2 as a sole stressor, which were 8% larger and developed faster at elevated CO2 compared with larvae from adults exposed to ambient CO2. These larvae, however, had significantly reduced survival in all multistressor treatments. This was particularly evident for larvae reared at elevated CO2 combined with elevated temperature or reduced food concentration, with no larvae surviving in some treatment combinations. Larvae from CO2-exposed adults had a higher standard metabolic rate. Our results provide evidence that parental exposure to ocean acidification may be maladaptive when larvae experience multiple stressors.
Data from: Lack of genetic introgression between wild and selectively bred Sydney rock oysters Saccostrea glomerata
Sydney rock oysters Saccostrea glomerata are among the most important estuarine species on the eastern coast of Australia and also the basis of a major aquaculture industry. The industry now largely relies on Sydney rock oysters that have been selectively bred for fast growth and disease resistance. Selectively bred S. glomerata are currently farmed in estuaries that also sustain wild populations of Sydney rock oysters, providing the opportunity for interbreeding. This has led to concern that gene flow from farmed, selectively bred oysters could alter the genetic variability of wild oyster populations. Here, we use next-generation genotype-by-sequencing to test for genetic introgression between wild and farmed, selectively bred (B2 line) Sydney rock oysters from 2 sites in the Georges River, NSW. Strong genetic partitioning was identified between the wild and selectively bred populations. There was no evidence of gene flow in the form of introgression, even though selectively bred B2 oysters have been farmed in the Georges River since the early 1990s. Contrary to our expectations, we also found significantly higher levels of genetic diversity and heterozygosity in the selectively bred population relative to the wild population. The relatively low level of genetic diversity that we detected in wild oysters may be particularly relevant to the adaptive capacity of this species in the wild.
Data from: Adult exposure to ocean acidification is maladaptive for larvae of the Sydney rock oyster Saccostrea glomerata in the presence of multiple stressors
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Data from: Lack of genetic introgression between wild and selectively bred Sydney rock oysters Saccostrea glomerata
Open the record for dataset details and reuse information.
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