A large population of king crabs in Palmer Deep on the west Antarctic Peninsula shelf and potential invasive impacts
| Type | : | ACL |
|---|---|---|
| Nature | : | Production scientifique |
| Au bénéfice du Laboratoire | : | Non |
| Statut de publication | : | Publié |
| Année de publication | : | 2012 |
| Auteurs (7) | : | SMITH Craig,r GRANGE L,j HONIG D,l NAUDTS L HUBER Bruce GUIDI Lionel DOMACK E |
| Revue scientifique | : | Proceedings of The Royal Society B-biological Sciences |
| Volume | : | 279 |
| Fascicule | : | 1730 |
| Pages | : | 1017-1026 |
| DOI | : | 10.1098/rspb.2011.1496 |
| URL | : | <go to isi>://wos:000299910400024 |
| Abstract | : | Lithodid crabs (and other skeleton-crushing predators) may have been excluded from cold Antarctic continental shelf waters for more than 14 Myr. The west Antarctic Peninsula shelf is warming rapidly and has been hypothesized to be soon invaded by lithodids. A remotely operated vehicle survey in Palmer Deep, a basin 120 km onto the Antarctic shelf, revealed a large, reproductive population of lithodids, providing the first evidence that king crabs have crossed the Antarctic shelf. DNA sequencing and morphology indicate the lithodid is Neolithodes yaldwyni Ahyong & Dawson, previously reported only from Ross Sea waters. We estimate a N yaldwyni population density of 10 600 km(-2) and a population size of 1.55 x 106 in Palmer Deep, a density similar to lithodid populations of commercial interest around Alaska and South Georgia. The lithodid occurred at depths of more than 850 m and temperatures of more than 1.4 degrees C in Palmer Deep, and was not found in extensive surveys of the colder shelf at depths of 430-725 m. Where N yaldwyni occurred, crab traces were abundant, megafaunal diversity reduced and echinoderms absent, suggesting that the crabs have major ecological impacts. Antarctic Peninsula shelf waters are warming at approximately 0.01 degrees C yr(-1); if N yaldwyni is currently limited by cold temperatures, it could spread up onto the shelf (400-600 m depths) within 1-2 decades. The Palmer Deep N yaldwyni population provides an important model for the potential invasive impacts of crushing predators on vulnerable Antarctic shelf ecosystems. |
| Mots-clés | : | lithodids invasion Antarctic climate warming bioturbation biodiversity loss climate-change bellingshausen sea crustacea decapoda continental-shelf lithodid crabs circulation ecosystem islands benthos slope Life Sciences & Biomedicine - Other Topics Environmental Sciences & Ecology Evolutionary Biology |
| Commentaire | : | ISI Document Delivery No.: 887ET Times Cited: 26 Cited Reference Count: 30 Smith, Craig R. Grange, Laura J. Honig, David L. Naudts, Lieven Huber, Bruce Guidi, Lionel Domack, Eugene Guidi, Lionel/B-3977-2012; Grange, Laura/E-8495-2014 Grange, Laura/0000-0001-9222-6848 NSF-OPP [0732711, 0636806, 0732467, 0732450, 074735]; Ghent University; BELSPO; SOEST [8479]; University of Hawaii at Manoa from Lamont-Doherty Earth Observatory [7492] We are very grateful to the extraordinary support at sea provided by RPSC, the captain and crew of the RVIB N. B. Palmer, and our colleagues in the LARISSA Project during cruise NBP10-01. Data collection occurred as parts of the LARISSA and FOODBANCS2 Projects, and was generously supported by NSF-OPP grant numbers 0732711 and 0636806 to C.R.S, 0732467 to E.D., 0732450 to C. L. Van Dover and 074735 to B.H. The ROV was funded by Impulsfinanciering of the Special Research Fund of Ghent University, and participation of the ROV team (Dries Boone, Katrien Heirman and Lieven Naudts) was co-financed by the BELSPO project HOLANT. We thank the referees A. Clarke, H. Ducklow and J. Pearse for substantially improving the manuscript. This is publication number 8479 from SOEST, University of Hawaii at Manoa and number 7492 from Lamont-Doherty Earth Observatory. 27 Royal soc London Biology; Ecology; Evolutionary Biology |
| Tags | : | - |
| Fichier attaché | : | - |
| Citation | : |
Smith CR, Grange LJ, Honig DL, Naudts L, Huber B, Guidi L, Domack E (2012) A large population of king crabs in Palmer Deep on the west Antarctic Peninsula shelf and potential invasive impacts. P Roy Soc B-biol Sci 279: 1017-1026 | doi: 10.1098/rspb.2011.1496
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