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51 results for “microbial community composition”
Dataset_2020_Biogeosciences_Protists and collembolans alter microbial community composition, C dynamics and soil aggregation in simplified consumer - prey systems
<p>Dataset associated to the publication: Erktan, A., Rillig, M.C., Carminati, A., Jousset, A., Scheu, S. (2020) Protists and collembolans alter microbial community composition, C dynamics and soil aggregation in simplified consumer - prey systems, Biogeosciences, accepted the 27/08/2020.</p>
Data from: Oral samples as non-invasive proxies for assessing the composition of the rumen microbial community
Microbial community analysis was carried out on ruminal digesta obtained directly via rumen fistula and buccal fluid, regurgitated digesta (bolus) and faeces of dairy cattle to assess if non-invasive samples could be used as proxies for ruminal digesta. Samples were collected from five cows receiving grass silage based diets containing no additional lipid or four different lipid supplements in a 5 x 5 Latin square design. Extracted DNA was analysed by qPCR and by sequencing 16S and 18S rRNA genes or the fungal ITS1 amplicons. Faeces contained few protozoa, and bacterial, fungal and archaeal communities were substantially different to ruminal digesta. Buccal and bolus samples gave much more similar profiles to ruminal digesta, although fewer archaea were detected in buccal and bolus samples. Bolus samples overall were most similar to ruminal samples. The differences between both buccal and bolus samples and ruminal digesta were consistent across all treatments. It can be concluded that either proxy sample type could be used as a predictor of the rumen microbial community, thereby enabling more convenient large-scale animal sampling for phenotyping and possible use in future animal breeding programs aimed at selecting cattle with a lower environmental footprint.
Data from: Effects of between-site variation in soil microbial communities and plant-soil feedbacks on the productivity and composition of plant communities
A critical challenge in the science and practice of restoration ecology is to understand the drivers of variation in restoration outcomes. Soil microbial communities may have a role in explaining this variation due to both site-to-site variation in the composition of soil microbial communities and due to variation that can arise due to plant-soil feedbacks. We tested the relative importance of between-site variation in soil microbial community composition and plant-soil feedbacks in shaping plant community composition and ecosystem function. We used a standard two-phase plant-soil feedback design. Soil inoculum was collected from four tallgrass prairie sites. Then, soils were conditioned separately with nine plant species, and conditioned soils were used to inoculate prairie community mesocosms. In a separate experiment using soil from an additional site we tested conditioned soil samples for the abundance of arbuscular mycorrhizal fungi (AMF) and rhizobia. Site of soil origin and plant-soil feedbacks both had effects on the composition and productivity of our plant communities, and the magnitudes of these effects were similar. We also found changes in the abundance of AMF and rhizobia due to plant-soil feedbacks and that AMF abundance were associated with differences in plant community composition. These results indicate that the composition of soil communities due to site-to-site variation and plant-soil feedbacks are both important determinants of plant community composition and productivity. Our results also suggest that AMF and rhizobia are key microbial functional groups underlying plant-soil feedback effects. Synthesis and applications. Site-to-site variation in soil communities can explain some variation in restoration of plant communities. Since plant-soil feedback effects of restored plant species do not overcome this variation, knowledge of soil microbial communities present at a site prior to initiation of restoration efforts may improve predictability of restoration outcomes, and reintroduction of some components of the soil community may be necessary to achieve restoration goals. Additionally, by understanding variation due to plant-soil feedbacks, restoration practitioners can choose plant species for reintroduction that will create favourable soil conditions, including promoting microbial mutualists. Plant-soil feedbacks should also make it possible to increase heterogeneity in soil microbial communities, leading to increases in beta diversity in plant communities.
Data from: Oral samples as non-invasive proxies for assessing the composition of the rumen microbial community
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Data from: The potential of hyperspectral patterns of winter wheat to detect changes in soil microbial community composition
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Data from: Effects of between-site variation in soil microbial communities and plant-soil feedbacks on the productivity and composition of plant communities
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Microbial Community Composition and Dynamics in Lungs of Cystic Fibrosis Sibling Pairs
ClinicalTrials.gov study NCT00590330. IPD Sharing: Not stated. Countries: 1. Publications: 0.
Microbial Community Composition and Metabolism in Cystic Fibrosis
ClinicalTrials.gov study NCT00954018. IPD Sharing: Not stated. Countries: 1. Publications: 0.
Microbial community composition in sediments resists perturbation by nutrient enrichment
GEO Series GSE25227. Bacteria; unidentified; uncultured bacterium. 48 samples. Type: Other.
Eutrophication and warming rapidly alter microbial community compositions in the mangrove sediment
GEO Series GSE190739. uncultured soil microorganism. 16 samples. Type: Other.
Impacts of invasive Australian acacias on soil bacterial community composition, microbial enzymatic activities, and nutrient availability in fynbos soils
<p>Invasive nitrogen-fixing plants often impact the soils they invade, notably through changes in soil chemistry and microbial community composition, which in turn could lead to alterations in soil functionality. We aimed to determine the impacts that invasive Australian <i>Acacia </i>trees have on soil chemistry and function (carbon, nitrogen, and phosphorus cycling) in South Africa's Core Cape Subregion, and whether any differences in soil function are linked to differences in soil chemical properties and bacterial community composition between neighbouring acacia-invaded and uninvaded sites. We do so by using Next Generation Sequencing (NGS) methods together with soil chemistry and soil enzyme functioning profiles. Acacias significantly increased levels of soil nitrogenous compounds (NO<sub>3</sub><sup>-</sup>, NH<sub>4</sub><sup>+</sup>, and total N), C, and pH. Acacias also significantly elevated microbial phosphatase activity, but not β-glucosidase, while having contrasting effects on urease. Acacia-induced changes in soil chemical properties were correlated with changes in enzyme activities for both urease and phosphatase. Changes in soil bacterial community composition due to the presence of invasive acacias were also correlated with phosphatase enzymatic activity. While we found evidence for acacias altering soil function by changing soil chemical properties and bacterial community composition, the legume-soil feedbacks underlying these impacts appear to be context specific.</p>
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Allen Brain Atlas
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DANDI Archive for NWB datasets
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International Brain Laboratory public data
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OpenNeuro
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