Metadata Catalogue Metadata Catalogue https://metadatacatalogue.lifewatch.eu/ https://metadatacatalogue.lifewatch.eu//srv/eng/portal.opensearch https://metadatacatalogue.lifewatch.eu//srv/eng/rdf.search?any= eng Continents, countries, sea regions of the world. https://metadatacatalogue.lifewatch.eu//srv/eng/thesaurus.download?ref=external.place.regions ecoportal.fos_1.rdf https://metadatacatalogue.lifewatch.eu//srv/eng/thesaurus.download?ref=external.ecoportal.fos application/xml XML text/html HTML 39780f54-1297-48ed-a9e3-2eb4e6e363ba DNA-based Taxonomic Relatedness This workflow assesses the taxonomic relationships among taxa in pelagic samples. It provides insight into community structure and the underlying ecological processes. First, species-level assignments from PEMA are harmonised against a standard taxonomy, such as WoRMS. Then, pairwise taxonomic distances are calculated using the Remote Virtual Laboratory for Taxonomic Computing (RvLab; Varsos et al. 2016), producing a distance matrix that captures distance among all detected species (taxa). This matrix can be normalised as needed and serves as the basis for diversity metrics, such as Faith's phylogenetic diversity, mean pairwise distance (MPD), or mean nearest taxon distance (MNTD). When relative abundance data are available, they can be incorporated to weight individual taxa. The resulting numerical index helps track shifts in community composition, detect homogenisation, and identify losses in taxonomic and functional diversity. relatedness taxonomy DNA-based metabarcoding pelagic habitats PEMA WoRMS RvLab WWW:LINK-1.0-http--link https://my.lifewatch.eu/workflow/create-workflow-from-template/aneris-taxonomic license LifeWatch ERIC Jose Zaiño