Benthic megafaunal and demersal fish assemblages on the chilean continental margin: the influence of the oxygen minimum zone on bathymetric distribution
Benthic megafaunal and demersal fish assemblages were sampled in three areas off Chile during the German-Chilean Expedition PUCK (SO-156) onboard the R/V Sonne from March to May 2001, at depths ranging from 120 to 2201 m. These samples, taken with an Agassiz trawl, are among the deepest ever taken i...
| Autores: | ; ; ; ; ; |
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| Tipo de documento: | Artículo |
| Estado: | Published version |
| Fecha de publicación: | 2009 |
| País: | Chile |
| Institución: | ANID |
| Repositorio: | Articulos_ANID |
| Lenguaje: | Inglés |
| OAI Identifier: | oai:repositorio.anid.cl:10533/198016 |
| Acceso en línea: | https://hdl.handle.net/10533/198016 |
| Nivel de acceso: | Acceso abierto |
| _version_ | 1878404499512492032 |
|---|---|
| author | Quiroga-Jamett, Eduardo |
| author2 | Sellanes-López, Rogelio Dieter, Gerdes Gallardo-Gallardo, Víctor Hebbeln, Dierk Wolf, Amtz |
| author2_role | author author author author author |
| author_browse | Dieter, Gerdes Gallardo-Gallardo, Víctor Hebbeln, Dierk Quiroga-Jamett, Eduardo Sellanes-López, Rogelio Wolf, Amtz |
| author_facet | Quiroga-Jamett, Eduardo Sellanes-López, Rogelio Dieter, Gerdes Gallardo-Gallardo, Víctor Hebbeln, Dierk Wolf, Amtz |
| author_role | author |
| collection | Articulos_ANID |
| description | Benthic megafaunal and demersal fish assemblages were sampled in three areas off Chile during the German-Chilean Expedition PUCK (SO-156) onboard the R/V Sonne from March to May 2001, at depths ranging from 120 to 2201 m. These samples, taken with an Agassiz trawl, are among the deepest ever taken in Chilean waters. A total of 147 species were recorded, mainly decapod crustaceans (Galatheidae, Pandalidae, Crangonidae), gastropods (Trochidae, Muricidae, Volutidae), ophiuroids (Asteronychidae, Gorgonocephalidae, Ophiolepididae, Ophiurinae), asteroids (Pterasteridae, Solasteridae, Goniopectinidae), polychaetes (Onuphidae, Aphroditidae, Maldanidae), and demersal fish (Macrouridae, lpnopidae, Squalidae). Species richness and rarefaction analyses suggest that the fauna was undersampled. From the 147 species identified in this study, 36 species (24.5%) occurred only once and another 24 species occurred only twice (16.3%). Depth and dissolved oxygen levels were found to be the main factors influencing megafaunal changes along the continental shelf and in bathyal areas, as indicated by principal component and Pearson's correlation analyses. Some species appear to be limited to distinct areas in the upper and lower bathyal zones, whereas other species have a wider range, extending from the continental shelf to lower bathyal zones. Biogeographic relations exist with the Pacific, South Atlantic, and Southern Oceans, but the latter seem to be weaker than would be expected considering the connection by Antarctic intermediate water. (C) 2008 Published by Elsevier Ltd. |
| eu_rights_str_mv | openAccess |
| format | article |
| id | CL_80ee68ef5d8e31e2ebb47d9c54eda2a3 |
| institution | ANID |
| instname_str | Agencia Nacional de Investigación y Desarrollo |
| language | eng |
| network_acronym_str | CL |
| network_name_str | Chile |
| oai_identifier_str | oai:repositorio.anid.cl:10533/198016 |
| publishDate | 2009 |
| publishDateSort | 2009 |
| publisher | PERGAMON-ELSEVIER SCIENCE LTD |
| publisherStr | PERGAMON-ELSEVIER SCIENCE LTD |
| reponame_str | Articulos_ANID |
| spelling | Benthic megafaunal and demersal fish assemblages on the chilean continental margin: the influence of the oxygen minimum zone on bathymetric distribution DEEP-SEA RESEARCH. PART 2. TOPICAL STUDIES IN OCEANOGRAPHY Deep-Sea Res. Part II-Top. Stud. Oceanogr. Quiroga-Jamett, Eduardo Sellanes-López, Rogelio Dieter, Gerdes Gallardo-Gallardo, Víctor Hebbeln, Dierk Wolf, Amtz Benthic megafaunal and demersal fish assemblages were sampled in three areas off Chile during the German-Chilean Expedition PUCK (SO-156) onboard the R/V Sonne from March to May 2001, at depths ranging from 120 to 2201 m. These samples, taken with an Agassiz trawl, are among the deepest ever taken in Chilean waters. A total of 147 species were recorded, mainly decapod crustaceans (Galatheidae, Pandalidae, Crangonidae), gastropods (Trochidae, Muricidae, Volutidae), ophiuroids (Asteronychidae, Gorgonocephalidae, Ophiolepididae, Ophiurinae), asteroids (Pterasteridae, Solasteridae, Goniopectinidae), polychaetes (Onuphidae, Aphroditidae, Maldanidae), and demersal fish (Macrouridae, lpnopidae, Squalidae). Species richness and rarefaction analyses suggest that the fauna was undersampled. From the 147 species identified in this study, 36 species (24.5%) occurred only once and another 24 species occurred only twice (16.3%). Depth and dissolved oxygen levels were found to be the main factors influencing megafaunal changes along the continental shelf and in bathyal areas, as indicated by principal component and Pearson's correlation analyses. Some species appear to be limited to distinct areas in the upper and lower bathyal zones, whereas other species have a wider range, extending from the continental shelf to lower bathyal zones. Biogeographic relations exist with the Pacific, South Atlantic, and Southern Oceans, but the latter seem to be weaker than would be expected considering the connection by Antarctic intermediate water. (C) 2008 Published by Elsevier Ltd. We thank all participants of the R/V Sonne 156 Cruise (PUCK Expedition 2001) who contributed to the success of this study. The expedition was funded by the German BMBF (No. 03GO156A) and organized in the framework of the FONDAP Humboldt Program 1997-2000 (CONICYT, Chile). Ongoing cooperation between the AW) and UdeC was funded by the International Bureau of the BMBF (Project No. CHL01/010). This research was funded by the COPAS center (CONICYT, Chile). The CIEP center (Gobierno regional de Aysen, BIP, No. 3004258-0) and the Census of Marine Life and affiliated field project COMARGE are thnaked for support given during the writing phase of this work. Taxonomic assistance was provided by Guillermo Guzman (crustaceans), Dr. Maritza Palma (polychaetes), Cynthia Lara de Castro Manso (ophiuroids), and Milton Pedraza and Dr. Ciro Oyarzon (fishes). We acknowledge the comments of two anonymous reviewers that helped to improve previous versions of this work. 2 FONDEF eduardo.quiroga@ciep.cl German BMBF [03GO156A]; FONDAP Humboldt Program 1997-2000; International Bureau of the BMBF [CHL01/010]; COPAS center (CONICYT, Chile) 16 56 PERGAMON-ELSEVIER SCIENCE LTD 1879-0100 D04I1111 WOS:000268272100008 0967-0645 https://hdl.handle.net/10533/198016 |
| spellingShingle | Benthic megafaunal and demersal fish assemblages on the chilean continental margin: the influence of the oxygen minimum zone on bathymetric distribution Quiroga-Jamett, Eduardo |
| status_str | publishedVersion |
| title | Benthic megafaunal and demersal fish assemblages on the chilean continental margin: the influence of the oxygen minimum zone on bathymetric distribution |
| title_full | Benthic megafaunal and demersal fish assemblages on the chilean continental margin: the influence of the oxygen minimum zone on bathymetric distribution |
| title_fullStr | Benthic megafaunal and demersal fish assemblages on the chilean continental margin: the influence of the oxygen minimum zone on bathymetric distribution |
| title_full_unstemmed | Benthic megafaunal and demersal fish assemblages on the chilean continental margin: the influence of the oxygen minimum zone on bathymetric distribution |
| title_short | Benthic megafaunal and demersal fish assemblages on the chilean continental margin: the influence of the oxygen minimum zone on bathymetric distribution |
| title_sort | Benthic megafaunal and demersal fish assemblages on the chilean continental margin: the influence of the oxygen minimum zone on bathymetric distribution |
| url | https://hdl.handle.net/10533/198016 |