Near-bottom current direction inferred from comatulid crinoid feeding postures on the Terre Adélie and George V shelf, East Antarctica
| Autor: | Huw J. Griffiths, Stephen R. Rintoul, Victoria Wadley, Robin J. Beaman, Lenaïg G. Hemery, Nadia Améziane, Marc Eléaume, Martin J. Riddle, Ben Best |
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| Přispěvatelé: | Institut de Systématique, Evolution, Biodiversité (ISYEB ), Muséum national d'Histoire naturelle (MNHN)-École pratique des hautes études (EPHE), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Université des Antilles (UA), British Antarctic Survey (BAS), Natural Environment Research Council (NERC), Australian Antarctic Division (AAD), Australian Government, Department of the Environment and Energy, CSIRO Wealth from Oceans Flagship, Station de Biologie Marine de Concarneau, Direction générale déléguée à la Recherche, à l’Expertise, à la Valorisation et à l’Enseignement-Formation (DGD.REVE), Muséum national d'Histoire naturelle (MNHN)-Muséum national d'Histoire naturelle (MNHN) |
| Jazyk: | angličtina |
| Rok vydání: | 2011 |
| Předmět: |
0106 biological sciences
geography geography.geographical_feature_category biology 010604 marine biology & hydrobiology [SDV]Life Sciences [q-bio] East antarctica Crinozoa Structural basin Oceanography biology.organism_classification Crinoid 010603 evolutionary biology 01 natural sciences Current (stream) Ocean gyre [SDE]Environmental Sciences 14. Life underwater Clockwise Transect Geology ComputingMilieux_MISCELLANEOUS |
| Zdroj: | Deep Sea Research Part II: Topical Studies in Oceanography Deep Sea Research Part II: Topical Studies in Oceanography, Elsevier, 2011, 58 (1-2), pp.163-169. ⟨10.1016/j.dsr2.2010.05.023⟩ |
| ISSN: | 0967-0645 |
| DOI: | 10.1016/j.dsr2.2010.05.023⟩ |
| Popis: | For the first time, comatulid crinoid feeding behaviour is used to infer near-bottom current (NBC) directions on the Terre Adelie and George V shelf, East Antarctica. We analysed 47 still-image and video transects sampled during the Collaborative East Antarctic Marine Census (CEAMARC) expedition in 2007–2008. We recorded the inferred current direction from 1537 comatulid observations and interpolated these data across the shelf using the Natural Neighbour Interpolation (NNI) method. Results revealed a mode current directionality at each station and a close local agreement between the observed and interpolated NBC directions. The interpolated NBC directions show a coherent counter-clockwise gyre in the deep George V Basin, with a northward and westward flow over the northern flank of the basin and eastward flow near the coast, consistent with the distribution of bottom salinity. There also appears to be a clockwise gyre on the relatively shallow Adelie Bank, with an easterly or southeasterly flow along the outer-shelf, south and southwesterly on the east Adelie Bank, and westerly along the Terre Adelie coast. |
| Databáze: | OpenAIRE |
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