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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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| Caulle, Clemence; Mojtahid, M.; Gooday, A. J.; Jorissen, F. J.; Kitazato, H.. |
| Rose-Bengal-stained foraminiferal assemblages (> 150 mu m) were analysed along a five-station bathymetric transect across the core and the lower part of the oxygen minimum zone (OMZ) on the Indian margin of the Arabian Sea. Sediment cores were collected using the manned submersible Shinkai 6500 during the RV Yokosuka cruise YK08-11 in the post-monsoon season (October 2008) at water depths ranging from 535 to 2000 m, along a gradient from almost anoxic to well-oxygenated (0.3 to 108 mu M) bottom waters. Stained benthic foraminifera were investigated from two different size fractions (150-300 mu m and > 300 mu m). Stained foraminiferal densities were very high in the core of the OMZ (at 535 and 649 m) and decreased at deeper sites. The faunas (> 150... |
| Tipo: Text |
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| Ano: 2015 |
URL: http://archimer.ifremer.fr/doc/00279/39027/37583.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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