Periodicity of wave-driven flows and lagoon water renewal for 74 Central Pacific Ocean atolls

Andréfouët, Serge; Desclaux, Térence; Buttin, Julie; Jullien, Swen; Aucan, Jérôme; Gendre, Romain Le; Liao, Vetea

doi:10.1016/j.marpolbul.2022.113748

Cited by 12 publications

(4 citation statements)

References 44 publications

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“…Fourth, the percentage of larval export from the lagoon to oceanic waters might be linked to lagoon water renewal, which vary depending on the atoll's geomorphology (Andréfouët et al, 2022). In the semi-enclosed atoll lagoon of Ahe, larval export rate has been estimated to be ~40% (Andréfouët et al, 2021b), while closed atolls are expected to export significantly less larvae (Andréfouët et al, 2001).…”

Section: Relevance Of the Approach And Results For Other Species And ...mentioning

confidence: 99%

Can food and temperature influence regional connectivity patterns of Bivalvia in fragmented archipelagos? Evidence from biophysical modeling applied to French Polynesia

Raapoto

Monaco

Wynsberge

et al. 2023

Preprint

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Larval dispersal and connectivity are key processes that drive marine metapopulation dynamics, and therefore should be well characterized when designing effective management strategies. While temperature and food availability can structure marine species connectivity patterns, their relative contribution has not been thoroughly investigated in highly fragmented archipelagos. We used biophysical modeling of larval dispersal to explore the connectivity patterns of species with complex life-cycles across French Polynesia (FP), a territory formed by more than a hundred small, geographically isolated islands covering an area as large as Europe. We first simulated ten years of larval dispersal to investigate the spatial and temporal (seasonal and interannual) variability in larval dispersal pathways for different hypothetical species exhibiting a range of Larval Precompetency Period (LPP) values. Then, using the black-lip pearl oyster (Pinctada margaritifera) as a model species, we accounted for variability in the LPP induced by temperature and food availability, as derived from a Dynamic Energy Budget (DEB) model. The model showed that food availability and meso-scale turbulence (eddies) in the Marquesas jointly constrained larval dispersal, reducing its potential connectivity with other archipelagos in FP. However, accounting for food and temperature effects on larval development, barely changed the connectivity pattern at regional scale due to the remoteness of this archipelago. The DEB simulations further revealed seasonal and interannual variability in connectivity driven by environmental conditions. Our results highlight the importance of considering temperature and food in biophysical models to adequately capture dispersal, connectivity and to identify appropriate management units at the regional scale.

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Section: Relevance Of the Approach And Results For Other Species And ...mentioning

confidence: 99%

Can food and temperature influence regional connectivity patterns of Bivalvia in fragmented archipelagos? Evidence from biophysical modeling applied to French Polynesia

Raapoto

Monaco

Wynsberge

et al. 2023

Preprint

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“…This atoll is distinct from the other studied atolls owing to the absence of deep passes connecting the lagoon to the open ocean. It is the most closed of all the study sites with only few several narrow hoa present on both the west and east flanks of the atoll (Andréfouët et al, 2022a). The maximal and average lagoon depth are respectively 43 and 25 m (Table 1).…”

Section: Takapoto Atollmentioning

confidence: 98%

“…It is therefore necessary to measure incoming waves with pressure sensors on, if possible, all the sectors of exposition of the studied atoll. Regional wave models are also useful to assess the conditions during a survey, and Wave Watch III model data have been used at high spatial resolution in some cases (Andréfouët et al, 2012a;Dutheil et al, 2021;Andréfouët et al, 2022aAndréfouët et al, , 2023b. Wind data are generally not monitored during shore-based field campaigns, as we relied on either the nearby Météo-France weather station if possible (e.g., Takaroa Atoll, Gambier Islands, data available through https://publitheque.meteo.fr, last access: 20 May 2023) or ERA5 reanalysis data (Hersbach et al, 2020).…”

Section: Atoll Geomorphology and Hydrodynamic Processmentioning

confidence: 99%

“…All the sites treated here are thus in a micro-tidal environment. Incoming waves breaking on the atoll crest directly modulate the flows through the wave-exposed open spillways (Tartinville et al, 1997;Dumas et al, 2012;Aucan et al, 2021;Andréfouët al., 2022a). The number and width of hoa are used to define the degree of aperture of an atoll, as a coarse proxy useful to characterize the water exchanges between ocean and lagoon and some biogeochemical variables (Dufour et al, 2001).…”

Section: Atoll Geomorphology and Hydrodynamic Processmentioning

confidence: 99%

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Lagoon hydrodynamics of pearl farming atolls: the case of Raroia, Takapoto, Apataki and Takaroa (French Polynesia)

Bruyère,

Le Gendre,

Chauveau

et al. 2023

Earth Syst. Sci. Data

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Abstract. Between 2018 and 2022, four pearl farming Tuamotu atolls of French Polynesia were monitored with autonomous oceanographic instruments to measure the hydrodynamics of atoll lagoons and the ocean–lagoon water exchanges. These surveys were conducted within the framework of the ANR-funded MANA (Management of Atolls) project and its extensions to additional sites. The overarching goal was to improve knowledge on the processes influencing the spat collection of the pearl oyster Pinctada margaritifera, the oyster species used to produce black pearls. These data sets are also critical for the calibration and validation of 3D high spatial resolution hydrodynamic models used to study oyster larval dispersal within lagoons. The observational strategies focused on the characterization of ocean–lagoon exchanges through passes and hoa (i.e., shallow reef flats), lagoon circulation, incident waves breaking on the forereef, water elevation inside the lagoon as well as spatial temperature variability. Chronologically, the investigated atolls were first Raroia Atoll with 9 months of measurements between May 2018 and March 2019 during which the MALIS1 and MALIS2 cruises on-board the R/V ALIS took place. It was followed by a 4 month deployment in Takapoto Atoll (November 2021 to March 2022). In late April 2022, Apataki Atoll was instrumented until end of July, followed by Takaroa measurements between July and October 2022. Apataki (Leg2) and Takaroa Atoll were conjointly instrumented during the MALIS 3 oceanographic cruise. Altogether, those multi-atoll data bring a worldwide unique oceanographic atoll data set that is useful for addressing local pearl farming questions but potentially beneficial for other fundamental and applied investigations. Each data set was post-processed, quality controlled and converted into NetCDF format. Files are available in open source into dedicated repositories in the SEANOE marine data platform. Links (DOI) of individual data sets are provided in Table 2.

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A quick and cost-effective method for modelling water renewal in shallow coral reef lagoons

Lalau

Wynsberge²,

Soulard³

et al. 2022

Coral Reefs

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Periodicity of wave-driven flows and lagoon water renewal for 74 Central Pacific Ocean atolls

Cited by 12 publications

References 44 publications

Can food and temperature influence regional connectivity patterns of Bivalvia in fragmented archipelagos? Evidence from biophysical modeling applied to French Polynesia

Can food and temperature influence regional connectivity patterns of Bivalvia in fragmented archipelagos? Evidence from biophysical modeling applied to French Polynesia

Lagoon hydrodynamics of pearl farming atolls: the case of Raroia, Takapoto, Apataki and Takaroa (French Polynesia)

A quick and cost-effective method for modelling water renewal in shallow coral reef lagoons

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