Common measures for studies of biodiversity : molecular phylogeny in the Eukaryotic microbial world / Mitchell L. Sogin

Public ISBD Accompagne Biodiversity II : Understanding and protecting our biological resources / Marjorie L. Reaka-Kudla Titre : Common measures for studies of biodiversity : molecular phylogeny in the Eukaryotic microbial world Type de document : texte imprimé Auteurs : Mitchell L. Sogin, Auteur ; Gregory Hinkle, Auteur Année de publication : 1997 Importance : p 109-122 Langues : Anglais (eng) Catégories : SCIENCES DE LA VIE Mots-clés : PHYLOGÉNIE MOLÉCULAIRE  BIODIVERSITE  MICROBE EUKARYOTIQUE  MONDE MICROBIAL Résumé : Biodiversity is surveyed at many different levels using a broad array of criteria. For many naturalists, richness in biodiversity is measured in terms of the number of species of a given genus per m2. Others are more concerned with the number of genera, classes, kingdoms etc...within an ecosystem. Although the fundamental concepts in systematic biology that underlie these studies are well established, different properties are used to infer evolutionary relationships for different kinds of organisms. Consequently, above the level of species, equivalence among taxonomic ranks for fungi, plants and animals is rather poor. Within the microbial world, the assignment of taxa to a particular species is generally meaningless. Accordingly, systematic descriptions of biodiversity can be contentious and sometimes are more appropriately described as forms of political ecology. If systematic biologists and ecologists are to complete an inventory of the taxosphere, its full importance will be appreciated only if a "common currency" can be established , one that will allow genetic diversity in one group to be calibrated against that observed in any other evolutionary assemblage. Numéro du document : A/BIO Niveau Bibliographique : 2 Bull1 (Theme principale) : BIOLOGIE Bull2 (Theme secondaire) : BIOLOGIE GENERALE Accompagne Biodiversity II : Understanding and protecting our biological resources / Marjorie L. Reaka-Kudla Common measures for studies of biodiversity : molecular phylogeny in the Eukaryotic microbial world [texte imprimé] / Mitchell L. Sogin, Auteur ; Gregory Hinkle, Auteur . - 1997 . - p 109-122. Langues : Anglais (eng) Catégories : SCIENCES DE LA VIE Mots-clés : PHYLOGÉNIE MOLÉCULAIRE  BIODIVERSITE  MICROBE EUKARYOTIQUE  MONDE MICROBIAL Résumé : Biodiversity is surveyed at many different levels using a broad array of criteria. For many naturalists, richness in biodiversity is measured in terms of the number of species of a given genus per m2. Others are more concerned with the number of genera, classes, kingdoms etc...within an ecosystem. Although the fundamental concepts in systematic biology that underlie these studies are well established, different properties are used to infer evolutionary relationships for different kinds of organisms. Consequently, above the level of species, equivalence among taxonomic ranks for fungi, plants and animals is rather poor. Within the microbial world, the assignment of taxa to a particular species is generally meaningless. Accordingly, systematic descriptions of biodiversity can be contentious and sometimes are more appropriately described as forms of political ecology. If systematic biologists and ecologists are to complete an inventory of the taxosphere, its full importance will be appreciated only if a "common currency" can be established , one that will allow genetic diversity in one group to be calibrated against that observed in any other evolutionary assemblage. Numéro du document : A/BIO Niveau Bibliographique : 2 Bull1 (Theme principale) : BIOLOGIE Bull2 (Theme secondaire) : BIOLOGIE GENERALE

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