| Title | Ecology and trophic role of Oncholaimus dyvae sp. nov. (Nematoda: Oncholaimidae) from the lucky strike hydrothermal vent field (Mid-Atlantic Ridge) |
| Abstract | Background: Nematodes are an important component of deep-sea hydrothermal vent communities, but only few nematode species are able to cope to the harsh conditions of the most active vent sites. The genus Oncholaimus is known to tolerate extreme geothermal conditions and high sulphide concentrations in shallow water hydrothermal vents, but it was only occasionally reported in deep-sea vents. In this study, we performed morphological, genetic and ecological investigations (including feeding strategies) on an abundant species of Oncholaimus recently discovered at Lucky strike vent field on the Mid-Atlantic Ridge at 1700 m water depth. |
| Source | BMC Zoology 4 |
| Keywords | Oncholaimus dyvae sp. nov.Hydrothermal ventsDeep seaCarbon and nitrogen isotopic ratios |
| Journal | BMC Zoology |
| Editor | , , |
| Year | 2019 |
| Type | Articolo in rivista |
| DOI | 10.1186/s40850-019-0044-y |
| Authors | Zeppilli, Daniela; Bellec, Laure; Cambon-Bonavita, Marie-Anne; Decraemer, Wilfrida; Fontaneto, Diego; Fuchs, Sandra; Gayet, Nicolas; Mandon, Perrine; Michel, Loic N.; Portail, Marie; Smol, Nic; Sorensen, Martin, V; Vanreusel, Ann; Sarrazin, Jozee |
| Text | 405308 2019 10.1186/s40850 019 0044 y ISI Web of Science WOS 000477659400001 Oncholaimus dyvae sp. nov. Hydrothermal vents Deep sea Carbon and nitrogen isotopic ratios Ecology and trophic role of Oncholaimus dyvae sp. nov. Nematoda Oncholaimidae from the lucky strike hydrothermal vent field Mid Atlantic Ridge Zeppilli, Daniela; Bellec, Laure; Cambon Bonavita, Marie Anne; Decraemer, Wilfrida; Fontaneto, Diego; Fuchs, Sandra; Gayet, Nicolas; Mandon, Perrine; Michel, Loic N.; Portail, Marie; Smol, Nic; Sorensen, Martin, V; Vanreusel, Ann; Sarrazin, Jozee IFREMER Ctr Brest REM EEP LEP; IFREMER; IUEM; UBO; Univ Ghent; CNR; Sorbonne Univ; Univ Copenhagen; Univ Ghent Background Nematodes are an important component of deep sea hydrothermal vent communities, but only few nematode species are able to cope to the harsh conditions of the most active vent sites. The genus Oncholaimus is known to tolerate extreme geothermal conditions and high sulphide concentrations in shallow water hydrothermal vents, but it was only occasionally reported in deep sea vents. In this study, we performed morphological, genetic and ecological investigations including feeding strategies on an abundant species of Oncholaimus recently discovered at Lucky strike vent field on the Mid Atlantic Ridge at 1700 m water depth. Results We described this species as Oncholaimus dyvae sp. nov.. This new species differs from all other members of the genus by the combination of the following characters body length up to 9 mm , the presence of a long spicule 79 mu m with a distally pointed end, a complex pericloacal setal ornamentation with one precloacal papilla surrounded by short spines, and a body cuticule with very fine striation shortly posterior to the amphid opening. Overall, O. dyvae sp. nov. abundance increased with increasing temperature and vent emissions. Carbon isotopic ratios suggest that this species could consume both thiotroph and methanotrophic producers. Furthermore sulfur oxidizing bacteria related to Epsilonproteobacteria and Gammaproteobacteria were detected in the cuticle, in the digestive cavity and in the intestine of O. dyvae sp. nov. suggesting a potential symbiotic association. 4 Published version https //bmczool.biomedcentral.com/articles/10.1186/s40850 019 0044 y zep 2019_BmcZool_Zeppilli et al.pdf Articolo in rivista 2056 3132 BMC Zoology BMC Zoology diego.fontaneto FONTANETO DIEGO |
