opens the authoritative record at ENA, SRA or BioSample; this page never replaces it
PRJEB20465
Pipeline 0.1.0 Contract v0.1 Licence CC-BY-4.0
Tags
- 16S rRNA
- V4
- amplicon
- selection pcr
- paired-end
- Illumina MiSeq
- primers present
- CC-BY-4.0
derived from the release metadata, not hand-written
Study
The study record carries no description, and its registered title is the accession itself. The figures below are computed from the 48 released samples and 48 runs.
- Samples
- 48
- Runs
- 48
- Collection
- 2014-08 to 2014-08
Linked publication
Microbial communities in low permeability, high pH uranium mine tailings: characterization and potential effects10.1111/jam.12180 · 2013 · via crossref
Linked by the enrich stage. Fields taken from the paper: . No per-sample coordinates in the paper.
Linked by the enrich stage from crossref.
Location
sampling sites from the release coordinatesNo sample coordinates in this release
The study reports no latitude or longitude, and its metadata carries no lat_lon text field either, so no map or place-name hierarchy can be drawn. Every other panel is computed from the count table and the sample metadata.
How the sequences were obtained
sample to releaseSample collection
48 samples, 2014-08 to 2014-08
no coordinates in the release
Storage
not reported
neither the archive nor the linked paper states storage conditions
Processing
not reported
no extraction kit or lysis protocol in the archive or the linked paper
PCR
16S rRNA V4
primers: present, trimmed; polymerase, cycle count and primer sequences are not stated in the linked paper
Sequencing preparation
not reported
no library kit or index strategy in the archive or the linked paper
Sequencing
Illumina MiSeq
48 runs; PAIRED 251.0 bp reads
Denoising
dada2 1.38.0
5,310 ASVs from 1,517,927 reads
ampliconflow branches off at step 6, Sequencing
this releaseampliconflow starts here: 1,517,927 reads from 48 runs, QC to 99.1% 16S identity and 91.8% above Q30, primers trimmed, dada2 1.38.0 to 5,310 ASVs, taxonomy against a SINTAX reference, then the release (CC-BY-4.0).
Steps 1 to 6 are how the sequences were obtained, from the study's own archive metadata. Step 7 is what the authors report doing with the sequences in the linked paper. ampliconflow starts at the deposited reads rather than repeating the wet lab.
Taxonomy assigned with SILVA 138.2 (SINTAX).
48
Samples
48 runs
5.3k
Features
OTUs at 97%
1.5M
Reads
mapped total
3.4 MB
Release size
128 files
Depth floor
1,000 reads
no samples below
QC warnings
3
6% of runs warned
Reads per sample
log scale- min
- 7,659
- median
- 25,583
- max
- 131,198
Feature detection
100.0% non-zero5,310 / 5,310 features
Features with at least one observed read. The remainder are present in the reference set but not detected in these samples.
Composition
Top phyla
- Pseudomonadota 985,401 (64.9%)
- Bacillota 244,496 (16.1%)
- Bacteroidota 175,310 (11.5%)
- Thermodesulfobacteriota 43,464 (2.9%)
- Actinomycetota 32,245 (2.1%)
- Acidobacteriota 12,362 (0.8%)
- Cyanobacteriota 7,679 (0.5%)
- Planctomycetota 3,623 (0.2%)
- Myxococcota 1,979 (0.1%)
- Chloroflexota 1,954 (0.1%)
- Ignavibacteriota 1,932 (0.1%)
- Verrucomicrobiota 1,920 (0.1%)
- Campylobacterota 1,219 (0.1%)
- Gemmatimonadota 607 (0.0%)
- Spirochaetota 573 (0.0%)
- Fusobacteriota 547 (0.0%)
- Bdellovibrionota 520 (0.0%)
- Thermoproteota 387 (0.0%)
- Chlamydiota 332 (0.0%)
- Elusimicrobiota 299 (0.0%)
Top genera
- Pseudomonas 562,458 (37.1%)
- Incertae Sedis 117,107 (7.7%)
- Hydrogenophaga 104,403 (6.9%)
- Lutibacter 77,764 (5.1%)
- Maritimimonas 77,426 (5.1%)
- Staphylococcus 67,223 (4.4%)
- Rhodoferax 57,655 (3.8%)
- Desulfuromonas 35,687 (2.4%)
- Erysipelothrix 30,351 (2.0%)
- Acinetobacter 28,747 (1.9%)
- Soehngenia 20,748 (1.4%)
- Eperythrozoon 18,024 (1.2%)
- Acidovorax 16,880 (1.1%)
- TC1 15,882 (1.0%)
- Thiobacillus 15,832 (1.0%)
- Bacillus 11,210 (0.7%)
- Methylobacterium 9,825 (0.6%)
- Fusibacter 9,054 (0.6%)
- Comamonas 8,288 (0.5%)
- Thiovirga 8,235 (0.5%)
Rank-abundance
log-log5,310 ranked features, top 200 shown. A steep drop means a few taxa carry most of the reads.
Per-sample reads
48 samples- min
- 7,659
- median
- 25,583
- max
- 131,198
Downstream QC and analysis
computed from the released tablesEleven modules, computed from the released count table, the sample metadata and the per-run QC reports. Each panel states its own n and the test it used; a module that cannot run on this release is shown as a flagged gap rather than an empty frame.
Rarefaction
median with p10 to p90Expected richness when 48 samples are subsampled to a common depth, resampled 31 draws. Median 101 features observed at full depth.
Depth against richness
log depthOne point per sample. Correlation of log reads with observed features is 0.668, so the depth floor is doing most of the work of deciding how many features a sample shows.
Per-run QC
- 16S identity 99.1% alignment call per run
- Q30 rate 91.8% mean Q 35.8
- Amplicon V4 primers present
- PhiX 0.0% control spike-in
48 run report(s), n/a GC, 0.0% ambiguous bases.
Diversity
- Shannon
- 3.24
- Simpson
- 0.925
- Evenness
- 0.712
- Chao1
- 101
Median across samples. Observed richness ranges 39 to 550.
Feature prevalence
0 of 5,310 features
present in at least half of the 48 samples (0.0%). 4,711 features appear in one sample only, which is the long tail rarefaction is fighting.
Ordination
One point per sample, 48 plotted. Choose the axes and the colour variable; hover a point for its sample id. The legend below the axes names the levels or the numeric range.
What explains each axis
pc1 · 15.6%
- shannon 50.5%
- evenness 48.0%
- observed 14.9%
- chao1 14.9%
pc2 · 5.7%
- evenness 5.8%
- shannon 4.2%
- observed 0.1%
- chao1 0.1%
pc3 · 5.1%
- evenness 4.7%
- shannon 3.3%
- reads 0.6%
- observed 0.0%
Categorical variables use eta-squared (between-group share of the axis), numeric ones the squared Pearson correlation. Computed from the released sample metadata.
Alpha diversity per sample
ShannonMedian Shannon 3.242 across the release; observed richness runs 39 to 550.
Bray-Curtis dissimilarity
48 x 48, darker is closerSample order is the release order, 48 labels, and the matrix itself ships as beta_distance.tsv beside the analysis.
Phylogenetic diversity
Not available for this release: no Newick tree beside the table; run the tree stage, then re-run analyze. The legacy analysis computed Faith's PD when the container carried a tree, and this one reports the absence instead of an empty column.
Community states
CLR, k by silhouettek = 7 silhouette 0.339
- state 0 4 samples
- state 1 1 samples
- state 2 5 samples
- state 3 17 samples
- state 4 3 samples
- state 5 2 samples
- state 6 16 samples
Clustered on the centred log-ratio of the top 200 features; 48 samples.
Batch-bias audit
states againstadjusted Rand n/a p = n/a
not enough levels to test
permutations. Every sample here carries both MiSeq and MiniSeq runs, so the batch variable used is the one with two levels, here .
Variance partitioning
mean R2 per feature, CLRJoint R2 n/a, so the metadata explains a modest slice of the feature variation, and the two variables are not independent of one another.
Effect size
No two-level comparison available.
Taxa against all samples
withfeatures tested, 0 survive the correction at q ≤ 0.05
Nothing survives. The smallest q is n/a, which is the honest answer for a study whose samples are spread across three years with two to thirteen samples per year.
Group difference and spread
Bray-Curtis, 999 permutations- PERMANOVA pseudo-F
- n/a · p n/a
- PERMDISP F
- n/a · p n/a
- Distance decay (Mantel r)
- n/a · p n/a
The contamination class separates the communities beyond the spread within each class (PERMANOVA) with no evidence that the spread itself differs (PERMDISP). Distance decay runs over n/a to n/a km.
Spatial structure
observed richness over distancethe study's coordinates fall on a single site (no spread), so spatial autocorrelation is not defined
Co-occurrence network
100 nodes · 1,278 edges
- positive
- 1,278
- negative
- 0
- density
- 0.258
- components
- 5
- mean degree
- 25.6
Spearman on log1p proportions, 100 features, |r| ≥ 0.50, FDR 0.05.
Hubs by degree
Phylogenetic and signal analyses need a tree
no Newick tree beside the table; run the tree stage, then re-run analyze. The tree stage aligns the ASVs with MAFFT and builds with FastTree, both detected as external tools; neither is installed on the machine this page was built on, so Faith's PD, UniFrac, Pagel's lambda and Blomberg's K are left flagged rather than guessed.
ASV phylogeny
0 most abundant of the treeNo tree in this release.
ASV panel
no sequence fileThe representative sequences are not in this release, so length and GC cannot be drawn.
Most abundant ASVs
| ASV | phylum | genus | mean | prev. |
|---|---|---|---|---|
| ASV_1 | Pseudomonadota | Pseudomonas | 1829.3 | 33% |
| ASV_2 | Bacteroidota | Lutibacter | 1234.6 | 33% |
| ASV_3 | Pseudomonadota | Pseudomonas | 934.9 | 2% |
| ASV_4 | Pseudomonadota | Pseudomonas | 679.5 | 2% |
| ASV_5 | Pseudomonadota | Pseudomonas | 486.6 | 19% |
| ASV_6 | Pseudomonadota | Pseudomonas | 447.4 | 4% |
| ASV_7 | Pseudomonadota | Pseudomonas | 429.7 | 31% |
| ASV_8 | Pseudomonadota | Pseudomonas | 407.4 | 4% |
| ASV_9 | Pseudomonadota | Incertae Sedis | 407.3 | 29% |
| ASV_10 | Pseudomonadota | Rhodoferax | 338.1 | 33% |
| ASV_11 | Pseudomonadota | Rhodoferax | 313.9 | 33% |
| ASV_12 | Pseudomonadota | Pseudomonas | 282.9 | 4% |
Similar studies
composition, metadata, location, shared authors- same region (V4)
19 samples
- composition only
11 samples
- same region (V4)
23 samples
- same region (V4)
22 samples
- same region (V4)
65 samples
- same region (V4)
33 samples
Ranked from the released tables: genus composition as Bray-Curtis similarity, shared environment and method terms, the distance between sample centroids, and authors shared with the linked publication.
Missing or wrong data?
Report a field that is empty or mistaken, or associate a paper with this study. No account is needed; the contact email is optional and used only to reply about this submission.
Downloads
8 files · sha256 in manifest- Count table 30 KB tables/PRJEB20465.parquet
- Count table, BIOM 88 KB tables/PRJEB20465.biom.gz
- Taxonomy 335 KB features.parquet
- Taxonomy (TSV) 362 KB taxonomy.tsv.gz
- Sample metadata 19 KB samples.parquet
- Run metadata 16 KB runs.parquet
- Sequences (fasta) 137 KB sequences/PRJEB20465.fasta.gz
- Manifest manifest.json
Files are served from https://huggingface.co/datasets/hmacgregor/ampliconflow-releases/resolve/main/PRJEB20465-20260926/ once hosting is wired. Until then the links point at a placeholder base URL.
Samples
| Sample | Collected | group | Reads | Features | Shannon | State |
|---|---|---|---|---|---|---|
| SAMEA103980914 | 2014-08 | 38,710 | 150 | 4.023 | 4 | |
| SAMEA103980915 | 2014-08 | 20,933 | 128 | 4.569 | 0 | |
| SAMEA103980916 | 2014-08 | 64,525 | 275 | 5.257 | 0 | |
| SAMEA103980917 | 2014-08 | 21,774 | 42 | 2.07 | 6 | |
| SAMEA103980918 | 2014-08 | 17,380 | 39 | 2.389 | 6 | |
| SAMEA103980919 | 2014-08 | 24,145 | 50 | 2.287 | 6 | |
| SAMEA103980920 | 2014-08 | 25,144 | 72 | 2.419 | 6 | |
| SAMEA103980921 | 2014-08 | 14,642 | 61 | 2.181 | 3 | |
| SAMEA103980922 | 2014-08 | 16,531 | 78 | 1.899 | 6 | |
| SAMEA103980923 | 2014-08 | 15,464 | 55 | 2.005 | 6 | |
| SAMEA103980924 | 2014-08 | 14,284 | 48 | 2.054 | 6 | |
| SAMEA103980925 | 2014-08 | 24,724 | 56 | 1.827 | 6 | |
| SAMEA103980926 | 2014-08 | 33,574 | 122 | 1.858 | 6 | |
| SAMEA103980927 | 2014-08 | 31,704 | 126 | 1.966 | 6 | |
| SAMEA103980928 | 2014-08 | 7,811 | 73 | 2.908 | 6 | |
| SAMEA103980929 | 2014-08 | 31,672 | 165 | 3.137 | 1 | |
| SAMEA103980930 | 2014-08 | 10,763 | 89 | 3.543 | 4 | |
| SAMEA103980931 | 2014-08 | 10,260 | 81 | 3.154 | 3 | |
| SAMEA103980932 | 2014-08 | 23,030 | 106 | 3.07 | 3 | |
| SAMEA103980933 | 2014-08 | 30,291 | 207 | 4.827 | 3 | |
| SAMEA103980934 | 2014-08 | 29,134 | 112 | 3.331 | 3 | |
| SAMEA103980935 | 2014-08 | 8,257 | 52 | 2.064 | 6 | |
| SAMEA103980936 | 2014-08 | 20,597 | 89 | 2.208 | 6 | |
| SAMEA103980937 | 2014-08 | 56,614 | 102 | 2.116 | 3 | |
| SAMEA103980938 | 2014-08 | 30,892 | 100 | 2.111 | 6 | |
| SAMEA103980939 | 2014-08 | 27,446 | 83 | 2.345 | 6 | |
| SAMEA103980940 | 2014-08 | 15,037 | 52 | 2.159 | 6 | |
| SAMEA103980941 | 2014-08 | 7,659 | 49 | 3.003 | 3 | |
| SAMEA103980942 | 2014-08 | 9,215 | 60 | 3.97 | 3 | |
| SAMEA103980943 | 2014-08 | 31,232 | 166 | 4.977 | 2 | |
| SAMEA103980944 | 2014-08 | 57,187 | 267 | 5.169 | 2 | |
| SAMEA103980945 | 2014-08 | 31,169 | 134 | 4.447 | 0 | |
| SAMEA103980946 | 2014-08 | 19,173 | 100 | 4.461 | 3 | |
| SAMEA103980947 | 2014-08 | 26,023 | 117 | 4.399 | 0 | |
| SAMEA103980948 | 2014-08 | 81,942 | 489 | 5.685 | 3 | |
| SAMEA103980949 | 2014-08 | 111,190 | 550 | 4.83 | 3 | |
| SAMEA103980950 | 2014-08 | 95,488 | 457 | 3.891 | 3 | |
| SAMEA103980951 | 2014-08 | 27,452 | 471 | 5.777 | 3 | |
| SAMEA103980952 | 2014-08 | 13,621 | 71 | 3.518 | 3 | |
| SAMEA103980953 | 2014-08 | 28,105 | 102 | 3.643 | 5 | |
| SAMEA103980954 | 2014-08 | 29,079 | 158 | 4.146 | 4 | |
| SAMEA103980955 | 2014-08 | 14,340 | 90 | 3.67 | 3 | |
| SAMEA103980956 | 2014-08 | 131,198 | 139 | 2.428 | 3 | |
| SAMEA103980957 | 2014-08 | 36,674 | 80 | 2.319 | 5 | |
| SAMEA103980958 | 2014-08 | 27,014 | 101 | 3.49 | 3 | |
| SAMEA103980959 | 2014-08 | 15,805 | 81 | 4.305 | 2 | |
| SAMEA103980960 | 2014-08 | 35,056 | 117 | 4.261 | 2 | |
| SAMEA103980961 | 2014-08 | 23,967 | 199 | 5.242 | 2 |
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