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Assessing Alternative Microscopy-Based Approaches to Species Abundance Description of Intertidal Diatom Communities ArchiMer
Ribeiro, Lourenço; Brotas, Vanda; Hernandez Farinas, Tania; Jesus, Bruno; Barille, Laurent.
Diatoms usually dominate microphytobenthic biofilms in coastal and estuarine intertidal environments. Yet, functional studies on biofilms often skip species analysis because benthic diatoms are notoriously difficult to extract from sediments and challenging to identify at that taxonomic level. Valid, less time-consuming alternatives would surely be welcomed and increase the inclusion of community structure information in microphytobenthos (MPB) ecophysiological studies. Starting with an original 181-species abundances matrix (OSM), obtained during a 2-year spatial–temporal survey in a Tagus Estuary intertidal flat with contrasting sediment textures, the current study assessed the effectiveness of several approaches to species abundances analysis. The...
Tipo: Text Palavras-chave: Diatoms; Community structure; Intertidal flats; Microphytobenthos; Multivariate analysis; Taxonomic sufficiency.
Ano: 2020 URL: https://archimer.ifremer.fr/doc/00610/72187/70963.pdf
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Morphospecies and taxonomic sufficiency of benthic megafauna in scientific bottom trawl surveys ArchiMer
Brind'Amour, Anik; Laffargue, Pascal; Morin, Jocelyne; Vaz, Sandrine; Foveau, Aurelie; Le Bris, Herve.
Scientific fisheries surveys routinely identify a large diversity of commercial and non-commercial benthic megainvertebrates that could provide useful information for Marine Strategy Framework Directive (MSFD) descriptors. Species is obviously the basic taxonomic level to which most ecological studies and theories refer. Identification at this level of organization is indeed always preferred over any other taxonomic level. Nevertheless, aggregation of species to higher taxonomic levels may be unavoidable sometimes, since errors of identification are known or suspected to occur in many surveys. Using analyses of taxonomic sufficiency (identification of organisms at various taxonomic resolutions) and groups of morphospecies (taxa identified easily by...
Tipo: Text Palavras-chave: Bay of Biscay; English Channel; North Sea; Taxonomic sufficiency; Benthic descriptor; Bottom trawl surveys.
Ano: 2014 URL: http://archimer.ifremer.fr/doc/00162/27309/25538.pdf
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