Publication Date:
2023-07-10
Description:
During the JC-10 cruise (2007), we sampled the Darwin mud volcano (MV) for meiofaunal community and trophic structure in relation of pore-water geochemistry along a 10 m transect from a seep site on the rim of the crater towards the MV slope. Sediment samples were retrieved by the ROV Isis using push cores. On board and after the pore water extraction, the top 10 cm of the cores were sliced into 1 cm sections and fixed them in 4% formaldehyde for meiofaunal community analysis. In the home laboratory, the formaldehyde-fixed samples were washed over a 32 µm mesh sieve and extracted the meiofauna from the sediment by Ludox centrifugation (Heip et al. 1985). Meiofauna was then sorted, enumerated and identified at coarse taxonomic level. From each slice, ca. 100 nematodes were identified to genus level. Afterwards, abundance of Nematoda were depth integrated over the top 5 cm to gain individual abundances per 10 cm**2. Overall, total nematode biomass in the top 5 cm of the seep sediment core was ~10x higher than that in the core taken 1100 m away. Nematode genus composition varied little among cores and was mainly dominated by Sabatieria.
Keywords:
34; Acantholaimus; Actinonema; Aegialoalaimus; Amphimonhystrella; Amphimonhystrella bullacauda; Anoplostoma; Antarcticonema; Anticoma; Anticyathus; Antomicron; Aponema; Axonolaimus; Bathyepsilonema; Bathyeurystomina; Calligyrus; Calyptronema; Camacolaimus; Campylaimus; Ceramonema; Cervonema; Chromadorella; Chromadorina; Chromadorita; Comesa; Counting; Crenopharynx; Cricohalalaimus; Cyartonema; Daptonema; Darwin Mounds; Deontolaimus; Depth, bottom/max; DEPTH, sediment/rock; Depth, top/min; Desmodora; Desmodora pilosa; Desmoscolex; Desmotricoma; Dichromadora; Didelta; Diplopeltula; Disconema; Dolicholaimus; Doliolaimus; Eleutherolaimus; Elzalia; Enoplolaimus; Ethmolaimidae; Eumorpholaimus; Event label; Filitonchus; Glochinema; Greeffiella; Habitat; Halalaimus; Halanonchus; Halichoanolaimus; Hapalomus; hermes; HERMES; hermione; HERMIONE; Hopperia; Hotspot Ecosystem Research and Mans Impact On European Seas; Hotspot Ecosystem Research on the Margins of European Seas; Innocuonema; James Cook; JC10-026; JC10-030; JC10-036-PUC01; JC10-036-PUC03; JC10-036-PUC07; JC10-036-PUC10; JC10-1; Latitude of event; Leptolaimoides; Leptolaimus; Linhomoeus; Linhystera; Litinium; Longicyatholaimus; Longitude of event; Manganonema; MEGAC; MegaCorer; Megadesmolaimus; Mesacanthion; Metachromadora; Metacyatholaimus; Metadesmolaimus; Metalinhomoeus; Metasphaerolaimus; Microlaimidae; Microlaimus; Minolaimus; Molgolaimus; Monhysterina; Monhystrella; Morlaixia; Nemanema; Nematoda; Neochromadora; Neotonchus; Notochaetosoma; Nyctonema; Omicronema; Oxystomina; Paracanthonchus; Paracomesoma; Paracyatholaimoides; Paracyatholaimus; Paraethmolaimus; Paralinhomoeus; Paralongicyatholaimus; Paramesacanthion; Paramonhystera; Parasphaerolaimus; Pareurystomina; Perspiria; Phanodermopsis; Pierrickia; Polysigma; Pomponema; Procamacolaimus; Prochromadorella; Prototricoma; Pselionema; Pseudocella; PUC; Push corer; Retrotheristus; Rhabdocoma; Rhabdodemania; Rhips; Richtersia; Sabatieria; Sabatieria bitumen; Sabatieria conicauda; Sabatieria demani; Sabatieria lawsi; Sabatieria ornata; Sabatieria propisinna; Sabatieria punctata; Sabatieria stekhoveni; Sabatieria vasicola; Southerniella; Sphaerolaimus; Stylotheristus; Symplocostoma; Synonchiella; Syringolaimus; Terschellingia; Tetrapturus; Thalassironus; Thalassoalaimus; Thalassomonhystera; Theristus; Trefusia; Tricoma; Tripyloides; Trochamus; Vasostoma; Viscosia; Wieseria; Xyalidae
Type:
Dataset
Format:
text/tab-separated-values, 395 data points
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