Deep macrobenthic communities from Nazaré Submarine Canyon (NW Portugal)
Macrofauna community structure within Nazaré Submarine Canyon is analysed and used to assess the potential effects of natural enrichment in this area subjected to accumulation of coastal sediments. A transect including three stations (2894, 3514 and 4141 m) was carried out in the Nazaré Submarine Ca...
| Main Authors: | , , , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
Consejo Superior de Investigaciones Científicas
2004-04-01
|
| Series: | Scientia Marina |
| Subjects: | |
| Online Access: | http://scientiamarina.revistas.csic.es/index.php/scientiamarina/article/view/403 |
| _version_ | 1818450762935566336 |
|---|---|
| author | J. Cúrdia S. Carvalho A. Ravara J. D. Gage A. M. Rodrigues V. Quintino |
| author_facet | J. Cúrdia S. Carvalho A. Ravara J. D. Gage A. M. Rodrigues V. Quintino |
| author_sort | J. Cúrdia |
| collection | DOAJ |
| description | Macrofauna community structure within Nazaré Submarine Canyon is analysed and used to assess the potential effects of natural enrichment in this area subjected to accumulation of coastal sediments. A transect including three stations (2894, 3514 and 4141 m) was carried out in the Nazaré Submarine Canyon (NW Portugal) during a cruise of OMEX II programme (Ocean Margin Exchange), in the winter season of 1999. Although data was not collected in order to calculate sedimentation rates, sampling station at 2894 m is located in an area characterised by high levels of sedimentation, thus a high amount of organic matter is expected to be available for the local communities. Faunistic data are discussed in the context of the different features of the stations sampled. Multivariate analysis clearly separates the shallowest station from the other ones, which otherwise appear to be very similar. It also revealed a perceptible gradient along sediment depth at all stations, from shallow to deeper layers. Exceptionally depressed species richness and low evenness values were observed at the 2894 m station. The high number of individuals of a single species, Cossura sp. A, and the atypical diversity, dominance and evenness values obtained for this station support the hypothesis of community disturbance due to organic enrichment. |
| first_indexed | 2024-12-14T20:56:28Z |
| format | Article |
| id | doaj.art-92b4b212a05341d18f822dda5031cdb4 |
| institution | Directory Open Access Journal |
| issn | 0214-8358 1886-8134 |
| language | English |
| last_indexed | 2024-12-14T20:56:28Z |
| publishDate | 2004-04-01 |
| publisher | Consejo Superior de Investigaciones Científicas |
| record_format | Article |
| series | Scientia Marina |
| spelling | doaj.art-92b4b212a05341d18f822dda5031cdb42022-12-21T22:47:40ZengConsejo Superior de Investigaciones CientíficasScientia Marina0214-83581886-81342004-04-0168S117118010.3989/scimar.2004.68s1171399Deep macrobenthic communities from Nazaré Submarine Canyon (NW Portugal)J. Cúrdia0S. Carvalho1A. Ravara2J. D. Gage3A. M. Rodrigues4V. Quintino5Universidade de Aveiro, Departamento de BiologiaINIAP/IPIMARUniversidade de Aveiro, Departamento de BiologiaScottish Association for Marine SciencesUniversidade de Aveiro, Departamento de BiologiaUniversidade de Aveiro, Departamento de BiologiaMacrofauna community structure within Nazaré Submarine Canyon is analysed and used to assess the potential effects of natural enrichment in this area subjected to accumulation of coastal sediments. A transect including three stations (2894, 3514 and 4141 m) was carried out in the Nazaré Submarine Canyon (NW Portugal) during a cruise of OMEX II programme (Ocean Margin Exchange), in the winter season of 1999. Although data was not collected in order to calculate sedimentation rates, sampling station at 2894 m is located in an area characterised by high levels of sedimentation, thus a high amount of organic matter is expected to be available for the local communities. Faunistic data are discussed in the context of the different features of the stations sampled. Multivariate analysis clearly separates the shallowest station from the other ones, which otherwise appear to be very similar. It also revealed a perceptible gradient along sediment depth at all stations, from shallow to deeper layers. Exceptionally depressed species richness and low evenness values were observed at the 2894 m station. The high number of individuals of a single species, Cossura sp. A, and the atypical diversity, dominance and evenness values obtained for this station support the hypothesis of community disturbance due to organic enrichment.http://scientiamarina.revistas.csic.es/index.php/scientiamarina/article/view/403deep seasubmarine canyonsne atlanticmacrobenthoscommunity structurenatural organic enrichment |
| spellingShingle | J. Cúrdia S. Carvalho A. Ravara J. D. Gage A. M. Rodrigues V. Quintino Deep macrobenthic communities from Nazaré Submarine Canyon (NW Portugal) Scientia Marina deep sea submarine canyons ne atlantic macrobenthos community structure natural organic enrichment |
| title | Deep macrobenthic communities from Nazaré Submarine Canyon (NW Portugal) |
| title_full | Deep macrobenthic communities from Nazaré Submarine Canyon (NW Portugal) |
| title_fullStr | Deep macrobenthic communities from Nazaré Submarine Canyon (NW Portugal) |
| title_full_unstemmed | Deep macrobenthic communities from Nazaré Submarine Canyon (NW Portugal) |
| title_short | Deep macrobenthic communities from Nazaré Submarine Canyon (NW Portugal) |
| title_sort | deep macrobenthic communities from nazare submarine canyon nw portugal |
| topic | deep sea submarine canyons ne atlantic macrobenthos community structure natural organic enrichment |
| url | http://scientiamarina.revistas.csic.es/index.php/scientiamarina/article/view/403 |
| work_keys_str_mv | AT jcurdia deepmacrobenthiccommunitiesfromnazaresubmarinecanyonnwportugal AT scarvalho deepmacrobenthiccommunitiesfromnazaresubmarinecanyonnwportugal AT aravara deepmacrobenthiccommunitiesfromnazaresubmarinecanyonnwportugal AT jdgage deepmacrobenthiccommunitiesfromnazaresubmarinecanyonnwportugal AT amrodrigues deepmacrobenthiccommunitiesfromnazaresubmarinecanyonnwportugal AT vquintino deepmacrobenthiccommunitiesfromnazaresubmarinecanyonnwportugal |