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"accession": "MGYS00004126",
"bioproject": "PRJDB2530",
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"last-update": "2019-11-07T16:23:46",
"secondary-accession": "DRP002239",
"centre-name": "Plankton laboratory",
"public-release-date": null,
"study-abstract": "Marine planktonic copepods are an ecologically important group with high species richness and abundance. Here, we propose a new metagenetic approach for revealing the community structure of marine planktonic copepods using 454 pyrosequencing of nuclear large subunit ribosomal DNA. We developed a method for clustering pyrosequencing data into molecular operational taxonomic units (MOTUs) through analysis of an artificial copepod community containing 33 morphologically identified species. The 99% similarity threshold had high species-level resolution for MOTU clustering but overestimated species richness. The artificial community was appropriately clustered into MOTUs at 97% similarity, with little inflation in MOTU numbers and with relatively high species-level resolution. The number of sequence reads per MOTU was correlated with dry weight of that taxon, suggesting that sequence reads could be used as a proxy for biomass. Next, we applied the method to field-collected samples, and the results corresponded reasonably well with morphological analysis of these communities. Numbers of MOTUs were well correlated with species richness at 97% similarity, and large numbers of sequence reads were generally observed in MOTUs derived from species with large biomass. MOTUs were successfully classified at the family level at 97% similarity; similar patterns of species richness and biomass within families were revealed with metagenetic and morphological analyses. At the 99% similarity threshold, MOTUs with high proportions of sequence reads were identified as biomass-dominant species in each field-collected sample. The metagenetic approach reported here can be an effective tool for rapid and comprehensive assessment of copepod community structure.",
"study-name": "A metagenetic approach for revealing community structure of marine planktonic copepods",
"data-origination": "HARVESTED"
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