Consulta: subjectFacets:"Biophysical model"
Registros recuperados: 6
Data/hora: 05/06/2024 18:12:28

Connectivity patterns of coastal fishes following different dispersal scenarios across a transboundary marine protected area (Bonifacio strait, NW Mediterranean)
Provedor de dados: 5
Autores: Koeck, Barbara; Gerigny, Olivia; Durieux, Eric Dominique Henri; Coudray, Sylvain; Garsi, Laure-helene; Bisgambiglia, Paul-antoine; Galgani, Francois; Agostini, Sylvia.
The Strait of Bonifacio constitutes one of the rare transboundary Marine Protected Areas (MPA) of the Mediterranean Sea (between Sardinia, Italy and Corsica, France). Based on the hypothesis that no-take zones will produce more fish larvae, compared to adjacent fished areas, we modeled the outcome of larvae released by coastal fishes inside the no-take zones of the MPA in order to: (i) characterize the dispersal patterns across the Strait of Bonifacio; (ii) identify the main potential settlement areas; (iii) quantify the connectivity and the larval supply from the MPAs to the surrounding areas. A high resolution hydrodynamic model (MARS 3D, Corse 400m) combined to an individual based model (Ichthyop software) was used to model the larval dispersal of fish...
Tipo: Text
Palavras-chave: Biophysical model; Early life stages; Reproductive timing; Pelagic larval duration; Corsica; Ichthyoplankton.
Ano: 2015
URL: https://archimer.ifremer.fr/doc/00248/35886/34407.pdf

Converging approaches for modeling the dispersal of propagules in air and sea
Provedor de dados: 5
Autores: Lett, Christophe; Barrier, Nicolas; Bahlali, Meissam.
Terrestrial plants seeds, spores and pollen are often dispersed by wind. Likewise, most eggs and larvae of marine organisms are dispersed by oceanic currents. It was historically believed that the spatial scale at which dispersal occurs was orders of magnitude smaller for plants than for fish. However, recent empirical estimates of seed and larval dispersal suggest that these dispersal scales are more alike than previously thought. The modeling approaches used to simulate aerial and aquatic dispersal are also converging. Similar biophysical models are developed, in which outputs of Eulerian models simulating the main physical forcing mechanism (wind or currents) are used as inputs to Lagrangian models that include biological components (such as seed...
Tipo: Text
Palavras-chave: Propagule dispersal; Aquatic dispersal; Oceanic dispersal; Marine dispersal; Aerial dispersal; Wind dispersal; Atmospheric dispersal; Biophysical model; Eulerian model; Lagrangian model.
Ano: 2020
URL: https://archimer.ifremer.fr/doc/00591/70333/68400.pdf

Modélisation des flux de matières dans la baie de Marennes-Oléron : couplage de l'hydrodynamisme, de la production primaire et de la consommation par les huîtres.
Provedor de dados: 5
Autores: Struski, Caroline.
To answer the questions of trophic capacity of the oyster bay of Marennes- Oléron, models were implemented since the 90s. The dynamics of the system is studied here by using a model 2D of hydrodynamism and transport with fine meshes (SiAM2D). The modelling and the analysis of existing data are used to answer the following questions: which factors control the primary production in the bay, in which scales of time act these factors, which link exists between pelagic and microphytobenthic productions , and which is the impact of oysters on the planctonic compartment SiAM2D serves as tool to couple models of pelagic and microphytobenthic primary production, and of filtration by oysters. The model of pelagic production is calibrated from measures of...
Tipo: Text
Palavras-chave: Oyster impact; Primary production; Scales of variability; Biophysical model; Impact des huîtres; Production primaire; Echelles de variabilité; Modèle biophysique.
Ano: 2005
URL: http://archimer.ifremer.fr/doc/2005/these-554.pdf

Additive effects of climate change on connectivity between marine protected areas and larval supply to fished areas
Provedor de dados: 5
Autores: Andrello, Marco; Mouillot, David; Somot, Samuel; Thuiller, Wilfried; Manel, Stephanie.
AimTo study the combined effects of climate change on connectivity between marine protected areas (MPAs) and larval supply to the continental shelf. LocationThe Mediterranean Sea, where sea surface temperatures are expected to strongly increase by the end of the 21st century, represents an archetypal situation with a dense MPA network but resource overexploitation outside. MethodsUsing an individual-based mechanistic model of larval transport, forced with an emission-driven regional climate change scenario for the Mediterranean Sea, we explored the combined effects of changes in hydrodynamics, adult reproductive timing and larval dispersal on the connectivity among MPAs and their ability to seed fished areas with larvae. ResultsWe show that, over the...
Tipo: Text
Palavras-chave: Biophysical model; Conservation planning; Epinephelus marginatus; Larval dispersal; Larval growth rate; Reproductive timing.
Ano: 2015
URL: https://archimer.ifremer.fr/doc/00627/73867/73398.pdf

Connectivity between seamounts and coastal ecosystems in the Southwestern Indian Ocean
Provedor de dados: 5
Autores: Crochelet, Estelle; Barrier, Nicolas; Andrello, Marco; Marsac, Francis; Spadone, Aurélie; Lett, Christophe.
Understanding larval connectivity patterns is critical for marine spatial planning, particularly for designing marine protected areas and managing fisheries. Patterns of larval dispersal and connectivity can be inferred from numerical transport models at large spatial and temporal scales. We assess model-based connectivity patterns between seamounts of the Southwestern Indian Ocean (SWIO) and the coastal ecosystems of Mauritius, La Réunion, Madagascar, Mozambique and South Africa, with emphasis on three shallow seamounts (La Pérouse [LP], MAD-Ridge [MR] and Walters Shoal [WS]). Using drifter trajectory and a Lagrangian model of ichthyoplankton dispersal, we show that larvae can undertake very long dispersion, with larval distances increasing with pelagic...
Tipo: Text
Palavras-chave: Seamounts; Connectivity; Larval duration; Larval drift; Lagrangian modelling; Biophysical model; Surface drifters; Southwestern indian ocean; Ichthyop.
Ano: 2020
URL: https://archimer.ifremer.fr/doc/00613/72461/71423.pdf

Modeling larval dispersal for the gilthead seabream in the northwestern Mediterranean sea
Provedor de dados: 5
Autores: Lett, Christophe; Barrier, Nicolas; Ourmières, Yann; Petit, Cécile; Labonne, Maylis; Bourjea, Jerome; Darnaude, Audrey M.
To investigate dispersal and connectivity between spawning and lagoon nursery habitats of the gilthead seabream, Sparus aurata, in the Gulf of Lions (northwestern Mediterranean Sea), we modeled the potential transport of the species’ larvae between its supposed main spawning site in the region (the Planier Island) and two of its main local nursery areas (the coastal lagoons of Thau and Salses-Leucate). Passive larval drift simulations using a dispersal biophysical model showed a large variability in the possible trajectories from spawning to nursery areas and in the predicted ages for larvae arrival on the two nursery sites. The most common ages at arrival obtained in the simulations (20–60 days) are broadly consistent with previous modeling studies but...
Tipo: Text
Palavras-chave: Sparus aurata; Gulf of Lions; Fish; Larvae; Models-hydrodynamic; Biophysical model; Connectivity; Otolith.
Ano: 2019
URL: https://archimer.ifremer.fr/doc/00513/62470/66903.pdf