Physical processes controlling passive larval transport at the Patagonian Shelf Break Front
The largest beds of the Patagonian scallop (Zygochlamys patagonica) have been associated with high chlorophyll-a concentration observed along the Patagonian Shelf Break Front but there is no supported hypothesis about how this benthic-pelagic connection is maintained. In this work we address the mai...
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| Acceso en línea: | http://hdl.handle.net/20.500.12110/paper_13851101_v124_n_p17_Franco |
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todo:paper_13851101_v124_n_p17_Franco2023-10-03T16:12:03Z Physical processes controlling passive larval transport at the Patagonian Shelf Break Front Franco, B.C. Palma, E.D. Combes, V. Lasta, M.L. Benthic-pelagic interaction Patagonian scallop Patagonian Shelf Break Front Stochastic processes benthic-pelagic coupling bivalve experimental study larval settlement larval transport particle settling physical activity shelf break front stochasticity turbulence Atlantic Ocean Patagonian Shelf The largest beds of the Patagonian scallop (Zygochlamys patagonica) have been associated with high chlorophyll-a concentration observed along the Patagonian Shelf Break Front but there is no supported hypothesis about how this benthic-pelagic connection is maintained. In this work we address the main physical processes driving the benthic-pelagic linkages through oriented numerical experiments derived from a realistic, high-resolution numerical model, and Lagrangian stochastic simulations. The results support the hypothesis of an important dynamical control of the slope current on the fate of surface released passive particles and their subsequent bottom settlement. A high percentage of the particles released at the surface settled over the scallop beds. The particles remaining at the surface layer followed a prevailing NE flow direction with low cross-shelf dispersion. Additional experiments show that the secondary cross-shelf circulation forced by the slope current promotes downwelling and hence the settlement of particles on the westward side (onshore) of the shelf break. The percent of particles settling over the scallop beds exceeded 80% by the addition of vertical stochastic turbulence and tidal forcing. These results highlight the importance of including the vertical diffusivity in particle tracking experiments to better estimate benthic-pelagic interaction processes. © 2017 The Authors JOUR info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by/2.5/ar http://hdl.handle.net/20.500.12110/paper_13851101_v124_n_p17_Franco |
| institution |
Universidad de Buenos Aires |
| institution_str |
I-28 |
| repository_str |
R-134 |
| collection |
Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) |
| topic |
Benthic-pelagic interaction Patagonian scallop Patagonian Shelf Break Front Stochastic processes benthic-pelagic coupling bivalve experimental study larval settlement larval transport particle settling physical activity shelf break front stochasticity turbulence Atlantic Ocean Patagonian Shelf |
| spellingShingle |
Benthic-pelagic interaction Patagonian scallop Patagonian Shelf Break Front Stochastic processes benthic-pelagic coupling bivalve experimental study larval settlement larval transport particle settling physical activity shelf break front stochasticity turbulence Atlantic Ocean Patagonian Shelf Franco, B.C. Palma, E.D. Combes, V. Lasta, M.L. Physical processes controlling passive larval transport at the Patagonian Shelf Break Front |
| topic_facet |
Benthic-pelagic interaction Patagonian scallop Patagonian Shelf Break Front Stochastic processes benthic-pelagic coupling bivalve experimental study larval settlement larval transport particle settling physical activity shelf break front stochasticity turbulence Atlantic Ocean Patagonian Shelf |
| description |
The largest beds of the Patagonian scallop (Zygochlamys patagonica) have been associated with high chlorophyll-a concentration observed along the Patagonian Shelf Break Front but there is no supported hypothesis about how this benthic-pelagic connection is maintained. In this work we address the main physical processes driving the benthic-pelagic linkages through oriented numerical experiments derived from a realistic, high-resolution numerical model, and Lagrangian stochastic simulations. The results support the hypothesis of an important dynamical control of the slope current on the fate of surface released passive particles and their subsequent bottom settlement. A high percentage of the particles released at the surface settled over the scallop beds. The particles remaining at the surface layer followed a prevailing NE flow direction with low cross-shelf dispersion. Additional experiments show that the secondary cross-shelf circulation forced by the slope current promotes downwelling and hence the settlement of particles on the westward side (onshore) of the shelf break. The percent of particles settling over the scallop beds exceeded 80% by the addition of vertical stochastic turbulence and tidal forcing. These results highlight the importance of including the vertical diffusivity in particle tracking experiments to better estimate benthic-pelagic interaction processes. © 2017 The Authors |
| format |
JOUR |
| author |
Franco, B.C. Palma, E.D. Combes, V. Lasta, M.L. |
| author_facet |
Franco, B.C. Palma, E.D. Combes, V. Lasta, M.L. |
| author_sort |
Franco, B.C. |
| title |
Physical processes controlling passive larval transport at the Patagonian Shelf Break Front |
| title_short |
Physical processes controlling passive larval transport at the Patagonian Shelf Break Front |
| title_full |
Physical processes controlling passive larval transport at the Patagonian Shelf Break Front |
| title_fullStr |
Physical processes controlling passive larval transport at the Patagonian Shelf Break Front |
| title_full_unstemmed |
Physical processes controlling passive larval transport at the Patagonian Shelf Break Front |
| title_sort |
physical processes controlling passive larval transport at the patagonian shelf break front |
| url |
http://hdl.handle.net/20.500.12110/paper_13851101_v124_n_p17_Franco |
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