The importance of resolving nearshore currents in coastal dispersal models

Ward, Sophie; Robins, Peter; Owen, A.; Demmer, Jonathan; Jenkins, Stuart R.

doi:10.1016/j.ocemod.2023.102181

Cited by 18 publications

(13 citation statements)

References 46 publications

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“…For the hydrodynamic model, a final bathymetric grid at 100m resolution was produced by merging the in situ and satellitederived bathymetry data and resampling it at 100m resolution (Figure 2). This model resolution was deemed suitable for our purpose following our experience in atoll model development, but it is also confirmed by recent sensitivity analyses study in other coastal environments (Ward et al, 2023). Previous bathymetric work using Landsat MSS noisy data at 80m spatial resolution was described by Pirrazoli et al (1984) but data are not available and the results could not be evaluated or used.…”

Section: Study Sitementioning

confidence: 64%

Lagoon hydrodynamics of pearl farming islands: the case of Gambier (French Polynesia)

Bruyère,

Le Gendre,

Liao

et al. 2023

Preprint

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Abstract. Between 2019 and 2020, the Gambier lagoon was instrumented over a period of 9 months with a large array of autonomous oceanographic instruments measuring temperature, pressure and current. Two deployments were conducted, respectively from June 2019 to October 2019 (Leg1) and from late October 2019 to late February 2020 (Leg2). A total of sixteen instrumented locations were spread across the lagoon and on the forereef. Physical parameters were measured to characterize the wave climate, tide and surges, lagoonal circulation, and spatial and vertical temperature variabilities. Those observations were part of the ANR-funded MANA project (2017–2022) and its derivatives that aimed to improve knowledge of processes influencing the spat collection of Pinctada margaritifera oysters that are used for black pearl farming and production. This data set was a prerequisite for the development of a high resolution biophysical model on Gambier lagoon which aims at tackling the connectivity oyster larvae. The sampling strategy focused on the northern region of Gambier lagoon and especially on the sub-lagoon of Rikitea which is a prime spat collection site. The data set was post processed, quality controlled and is archived in a dedicated repository with a permanent DOI into the SEANOE marine data platform.

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Section: Study Sitementioning

confidence: 64%

Lagoon hydrodynamics of pearl farming islands: the case of Gambier (French Polynesia)

Bruyère,

Le Gendre,

Liao

et al. 2023

Preprint

View full text Add to dashboard Cite

show abstract

“…2). This model resolution was deemed suitable for our purpose following our experience in atoll model development, but it was also confirmed by a recent sensitivity analyses study in other coastal environments (Ward et al, 2023). Previous bathymetric work using Landsat MSS noisy data at 80 m spatial resolution was described by Pirrazoli et al (1984), but data are not available and the results could not be evaluated or used.…”

Section: Study Sitementioning

confidence: 67%

Lagoon hydrodynamics of pearl farming islands: the case of Gambier (French Polynesia)

Bruyère,

Le Gendre,

Liao

et al. 2024

Earth Syst. Sci. Data

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Abstract. Between 2019 and 2020, the Gambier lagoon was instrumented over a period of 9 months with a large array of autonomous oceanographic instruments measuring temperature, pressure, and current. Two deployments were conducted from June to October 2019 (Leg1) and from late October 2019 to late February 2020 (Leg2). A total of 16 instrumented locations were spread across the lagoon and on the forereef. Physical parameters were measured to characterize the wave climate, tide and surges, lagoonal circulation, and spatial and vertical temperature variabilities. Those observations were part of the ANR-funded MANA project (2017–2022) and its derivatives that were aimed at improving knowledge of processes influencing the spat collection of Pinctada margaritifera oysters that are used for black pearl farming and production. This dataset was a prerequisite for the development of a high-resolution biophysical model on the Gambier lagoon that is aimed at understanding the connectivity of oyster larvae (Bruyère et al., 2023a). The sampling strategy focused on the northern region of the Gambier lagoon and especially on the sub-lagoon of Rikitea, which is a prime spat collection site. The dataset was post processed, quality controlled, and is archived in a dedicated repository with a permanent DOI via the SEANOE marine data platform (https://doi.org/10.17882/94148, Andréfouët et al., 2023b).

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“…Such results recall the importance of having hydrodynamic models that well represent the mesoscale structures of the circulation. A fine resolution of the model is a prerequisite for a good representation of connectivity [37], especially when larval dispersal occurred in coastal waters. Our study was less sensitive to the hydrodynamic model resolution of 2 km because it was conducted in open waters and for zones above the continental slope.…”

Section: Discussionmentioning

confidence: 99%

Indicators to assess interannual variability in marine connectivity processes: a semi-theoretical approach

Clavel-Henry,

Bahamon,

Aguzzi

et al. 2024

Preprint

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Oceanographic connectivity in an effective network of protected areas is crucial for restoring and stabilising marine populations. However, temporal variability of connectivity is rarely considered as a criterion in designing and evaluating marine conservation planning. In this study, indicators were defined to characterise occurrence, strength and frequency of the temporal variability in connectivity in a northwestern Mediterranean Sea area. Indicators were tested on semi-theoretically-estimated connections provided by the runs of a passive particle transport model in a climatological year and in three years between 2006 - 2020, showing large deviation from the climatological year. The indicators compared the temporal variability in connectivity of four zones, highlighting differences in connectivity due to their locations and the mesoscale hydrodynamics, and identifying areas that require further investigation. The three indicators also showed that the temporal variability in connectivity was influenced by the duration and depth of particle transport, although no consistent pattern was observed in the indicator variations of the compared zones. Provided that specific objectives will be given when parameterising transport models (i.e., selection of focus species and time period), indicators of temporal variability in connectivity have potential to support, and correctly implement, spatial conservation planning, prioritise the protection of marine resources, and measure the effectiveness of Marine Protected Areas, in line with a long-term vision of ocean management.

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The importance of resolving nearshore currents in coastal dispersal models

Cited by 18 publications

References 46 publications

Lagoon hydrodynamics of pearl farming islands: the case of Gambier (French Polynesia)

Lagoon hydrodynamics of pearl farming islands: the case of Gambier (French Polynesia)

Lagoon hydrodynamics of pearl farming islands: the case of Gambier (French Polynesia)

Indicators to assess interannual variability in marine connectivity processes: a semi-theoretical approach

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