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| Gooday, Andrew J.; Holzmann, Maria; Caulle, Clemence; Goineau, Aurelie; Jones, Daniel Ob; Kamenskaya, Olga; Simon-lledo, Erik; Weber, Alexandra A. -t.; Pawlowski, Jan. |
| We describe Aschemonella monile Gooday and Holzmann sp. nov. from the Clarion-Clipperton Zone (CCZ, abyssal eastern equatorial Pacific), a region characterized by commercially significant concentrations of polymetallic nodules. The new species is the most abundant xenophyophore (giant agglutinated foraminifera) in our main sampling area (12-14 degrees N; 116 degrees 30'-117 degrees 26'W). Additional specimens originate from the central CCZ, and from a third area, similar to 900 km NW of the main area, where A. monile numerically dominates the megabenthos in photographic surveys of the seafloor (average densities 1.54 individuals/m(2); peak densities > 3 individuals/m(2)). Aschemonella monile is much larger (>= 7 cm in length) than previously... |
| Tipo: Text |
Palavras-chave: Abyssal megafauna; Biodiversity; Clarion-Clipperton Zone; Deep-sea benthos; Deep-sea mining; Protist. |
| Ano: 2018 |
URL: https://archimer.ifremer.fr/doc/00435/54663/56099.pdf |
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| Guillou, Laure; Bachar, Dipankar; Audic, S; Bass, David; Berney, Cedric; Bittner, Lucie; Boutte, Christophe; Burgaud, Gaetan; De Vargas, Colomban; Decelle, Johan; Del Campo, Javier; Dolan, John R.; Dunthorn, Micah; Edvardsen, Bente; Holzmann, Maria; Kooistra, Wiebe H. C. F.; Lara, Enrique; Le Bescot, Noan; Logares, Ramiro; Mahe, F; Massana, Ramon; Montresor, Marina; Morard, Raphael; Not, Fabrice; Pawlowski, Jan; Probert, Ian; Sauvadet, Anne-laure; Siano, Raffaele; Stoeck, Thorsten; Vaulot, Daniel; Zimmermann, Pascal; Christen, Richard. |
| The interrogation of genetic markers in environmental meta-barcoding studies is currently seriously hindered by the lack of taxonomically curated reference data sets for the targeted genes. The Protist Ribosomal Reference database (PR2, http://ssurrna. org/) provides a unique access to eukaryotic small sub-unit (SSU) ribosomal RNA and DNA sequences, with curated taxonomy. The database mainly consists of nuclear-encoded protistan sequences. However, metazoans, land plants, macrosporic fungi and eukaryotic organelles (mitochondrion, plastid and others) are also included because they are useful for the analysis of hightroughput sequencing data sets. Introns and putative chimeric sequences have been also carefully checked. Taxonomic assignation of sequences... |
| Tipo: Text |
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| Ano: 2013 |
URL: http://archimer.ifremer.fr/doc/00114/22492/20174.pdf |
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| Gooday, Andrew J.; Holzmann, Maria; Caulle, Clemence; Goineau, Aurelie; Kamenskaya, Olga; Weber, Alexandra A. -t.; Pawlowski, Jan. |
| Xenophyophores, giant, fragile, agglutinated foraminifera (protists), are major constituents of the abyssal megafauna in the equatorial Pacific Clarion-Clipperton Zone (Ca), a region where seabed mining of polymetallic nodules may occur in the future. As part of a baseline study of benthic communities We made extensive collections of xenophyophores in two areas (UK-1 and OMS) licensed for exploration by the International Seabed Authority. Based on test morphology, we distinguished 36 morphospecies (34 new to science) among 130 specimens. Twenty of these morphospecies yielded 184 DNA sequences, a 14-fold increase in genetic data for xenophyophores that confirms their high diversity in the eastern Ca. A further 15 morphospecies (8 new to science) were... |
| Tipo: Text |
Palavras-chave: Deep-sea mining; Deep-sea benthos; Biodiversity; Protist; Clarion-Clipperton Zone. |
| Ano: 2017 |
URL: https://archimer.ifremer.fr/doc/00381/49275/49680.pdf |
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