|
|
|
|
|
| Diogoul, Ndague; Brehmer, Patrice; Demarcq, Herve; El Ayoubi, Salaheddine; Thiam, Abou; Sarre, Abdoulaye; Mouget, Anne; Perrot, Yannick. |
| The resistance of an east border upwelling system was investigated using relative index of marine pelagic biomass estimates under a changing environment spanning 20-years in the strongly exploited southern Canary Current Large marine Ecosystem (sCCLME). We divided the sCCLME in two parts (north and south of Cap Blanc), based on oceanographic regimes. We delineated two size-based groups (“plankton” and “pelagic fish”) corresponding to lower and higher trophic levels, respectively. Over the 20-year period, all spatial remote sensing environmental variables increased significantly, except in the area south of Cap Blanc where sea surface Chlorophyll-a concentrations declined and the upwelling favorable wind was stable. Relative index of marine pelagic... |
| Tipo: Text |
|
| Ano: 2021 |
URL: https://archimer.ifremer.fr/doc/00676/78789/81019.pdf |
| |
|
|
| Diogoul, Ndague; Brehmer, Patrice; Perrot, Yannick; Tiedemann, Maik; Abou Thiam,; El Ayoubi, Salaheddine; Mouget, Anne; Migayrou, Chloe; Sadio, Oumar; Sarre, Abdoulaye. |
| Understanding the relationship between sound-scattering layers (SSLs) and pelagic habitat characteristics is a substantial step to apprehend ecosystem dynamics SSLs are detected on echo sounders representing aggregated marine pelagic organisms. In this study, SSL characteristics of zooplankton and micronekton were identified during an upwelling event in two contrasting areas of the Senegalese continental shelf. Here a cold upwelling-influenced inshore area was sharply separated by a strong thermal boundary from a deeper, warmer, stratified offshore area. Mean SSL thickness and SSL vertical depth increased with the shelf depth. The thickest and deepest SSLs were observed in the offshore part of the shelf. Hence, zooplankton and micronekton seem to occur... |
| Tipo: Text |
|
| Ano: 2020 |
URL: https://archimer.ifremer.fr/doc/00606/71777/70261.pdf |
| |
|
|
|
