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Registros recuperados: 5
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Some considerations for analyzing biodiversity using integrative metagenomics and gene networks ArchiMer
Bittner, Lucie; Halary, Sebastien; Payri, Claude; Cruaud, Corinne; De Reviers, Bruno; Lopez, Philippe; Bapteste, Eric.
Background: Improving knowledge of biodiversity will benefit conservation biology, enhance bioremediation studies, and could lead to new medical treatments. However there is no standard approach to estimate and to compare the diversity of different environments, or to study its past, and possibly, future evolution. Presentation of the hypothesis: We argue that there are two conditions for significant progress in the identification and quantification of biodiversity. First, integrative metagenomic studies - aiming at the simultaneous examination (or even better at the integration) of observations about the elements, functions and evolutionary processes captured by the massive sequencing of multiple markers - should be preferred over DNA barcoding projects...
Tipo: Text Palavras-chave: Microbial diversity; Species concept; Dna barcodes; Ecological perspective; Community; Functional analysis; Rhodophyta; Systematics; Fragments; Taxonomy.
Ano: 2010 URL: https://archimer.ifremer.fr/doc/00202/31321/29733.pdf
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Species boundaries in non-tropical Northern Hemisphere Owls Naturalis
Voous, K.H..
A survey is presented of the status of species boundaries in nontropical Northern Hemisphere owls in order to investigate the reality of the biological and geographical species concept applied to these owls in current handbooks. At the same time the practicability of evolutionary systematics as opposed to phylogenetic synthesis is elaborated on.
Tipo: Article / Letter to the editor Palavras-chave: Northern Hemisphere Owls; Species boundary; Species concept.
Ano: 1990 URL: http://www.repository.naturalis.nl/record/504117
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Phylogeny and character evolution of the coprinoid mushroom genus Parasola as inferred from LSU and ITS nr DNA sequence data Naturalis
Nagy, L.G.; Kocsubé, S.; Papp, T.; Vágvölgyi, C..
Phylogenetic relationships, species concepts and morphological evolution of the coprinoid mushroom genus Parasola were studied. A combined dataset of nuclear ribosomal ITS and LSU sequences was used to infer phylogenetic relationships of Parasola species and several outgroup taxa. Clades recovered in the phylogenetic analyses corresponded well to morphologically discernable species, although in the case of P. leiocephala, P. lilatincta and P. plicatilis amended concepts proved necessary. Parasola galericuliformis and P. hemerobia are shown to be synonymous with P. leiocephala and P. plicatilis, respectively. By mapping morphological characters on the phylogeny, it is shown that the emergence of deliquescent Parasola taxa was accompanied by the development...
Tipo: Article / Letter to the editor Palavras-chave: Agaricales; Coprinus section Glabri; Deliquescence; Gap coding; Morphological traits; Psathyrella; Species concept.
Ano: 2009 URL: http://www.repository.naturalis.nl/record/532343
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The enigmatic Marmorkrebs (marbled crayfish) is the parthenogenetic form of Procambarus fallax (Hagen, 1870) Naturalis
Martin, P.; Dorn, N.J.; Kawai, T.; Heiden, C. van der; Scholtz, G..
A mysterious parthenogenetic cambarid crayfish (the Marmorkrebs) has been spreading across the globe for the past decade. We compare this crayfish directly to two other cambarids, Procambarus fallax and P. alleni, that have been suggested to be related or even identical to the Marmorkrebs. Using external morphology and sequences of two mitochondrial genes we show clear correspondences between Marmorkrebs and P. fallax, a species found natively throughout peninsular Florida, USA. Based on these congruent results we suggest that the Marmorkrebs is the parthenogenetic form of P. fallax. This finding has potential evolutionary and ecological implications at several levels. The Marmorkrebs might be a type of geographical parthenogenesis, but a natural...
Tipo: Article / Letter to the editor Palavras-chave: 12S rRNA; Annulus ventralis; COI; DNA barcoding; Species concept; Thelytoky; 42.74.
Ano: 2010 URL: http://www.repository.naturalis.nl/record/355212
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Generic hyper-diversity in Stachybotriaceae Naturalis
L. Lombard; J. Houbraken; C. Decock; R.A. Samson; M. Meijer; M. Réblová; J.Z. Groenewald; P.W. Crous.
The family Stachybotriaceae was recently introduced to include the genera Myrothecium, Peethambara and Stachybotrys. Members of this family include important plant and human pathogens, as well as several species used in industrial and commercial applications as biodegraders and biocontrol agents. However, the generic boundaries in Stachybotriaceae are still poorly defined, as type material and sequence data are not readily available for taxonomic studies. To address this issue, we performed multi-locus phylogenetic analyses using partial gene sequences of the 28S large subunit (LSU), the internal transcribed spacer regions and intervening 5.8S nrRNA (ITS), the RNA polymerase II second largest subunit (rpb2), calmodulin (cmdA), translation elongation factor...
Tipo: Article / Letter to the editor Palavras-chave: Biodegraders; Generic concept; Human and plant pathogens; Indoor mycobiota; Multi-gene phylogeny; Species concept; Taxonomy.
Ano: 2016 URL: http://www.repository.naturalis.nl/record/607366
Registros recuperados: 5
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