Larval transport in the upwelling ecosystem of central Chile: The effects of vertical migration, developmental time and coastal topography on recruitment

Ospina-Álvarez, Andrés; Weidberg, Nicolás; Aiken, Christopher M.; Navarrete, Sergio A.

doi:10.1016/j.pocean.2018.09.016

Cited by 38 publications

(23 citation statements)

References 119 publications

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“…A more coastal surface current (Chilean coastal current) also flows predominantly to the north, and responds to upwellingfavourable wind forcing (Aiken et al, 2008). This coastal surface current is essential for the transport of coastal-released gametes (Ospina-Alvarez et al, 2018).…”

Section: Model Domainmentioning

confidence: 99%

“…In consequence, larvae leaving the studied domain through the northern, southern and western open boundaries and larvae advected into oceanic waters are considered to be lost for recruitment. We considered that larvae display Diel Vertical Migration (DVM) behaviour, previously shown to effect recruitment rates onshore but which does not significantly alter spatial or temporal patterns of connectivity (Ospina-Alvarez et al, 2018). A connectivity score that incorporates seasonality was used to capture observed reproductive peaks of the model species: summer and winter for Concholepas, and spring and summer for key-hole limpets and the red sea urchin.…”

Section: Biophysical Connectivitymentioning

confidence: 99%

“…For demersal and benthic marine organisms, whose adults are predominantly sedentary, large-scale connectivity is mediated through the dispersal of early-life stages (i.e., eggs and larvae). Egg and larval connectivity patterns are driven by biophysical processes characterized by strong temporal and spatial variability (Ospina-Alvarez et al, 2018). Such variability modulates the structure and function of benthic ecosystems, and it is therefore an essential input for the configuration of MPA networks (Fovargue et al, 2017).…”

Section: Introductionmentioning

confidence: 99%

“…To address these multi-disciplinary challenges, we developed a spatial optimization model that explicitly incorporates the inherent dynamism of coastal biophysical systems (Ospina-Alvarez et al, 2018). Ecological connectivity is estimated through coupled biophysical models of egg and larval dispersal along a coastal system.…”

Section: Introductionmentioning

confidence: 99%

“…The optimization model was built based on a case study in the central coast of Chile, a highly productive region within the Humboldt Upwelling Ecosystem, where wind-driven coastal upwelling supports productive industrial and small-scale fisheries (Thiel et al, 2007;Chavez and Messié, 2009). A circulation model is used to capture realistic dynamics of the coastal ocean in this area, this model has previously been applied to examine dispersal and connectivity of coastal invertebrates (Ospina-Alvarez et al, 2018;Blanco et al, 2019). Biological data from the coastal ecosystem dominated by intertidal and subtidal rocky habitats, the habitat of the principal commercial species for small-scale fisheries in the region, is also available (de Juan et al, 2015).…”

Section: Introductionmentioning

confidence: 99%

See 4 more Smart Citations

Integration of biophysical connectivity in the spatial optimization of coastal ecosystem services

Ospina-Álvarez

Juan

Davis

et al. 2020

Science of The Total Environment

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Section: Model Domainmentioning

confidence: 99%

Section: Biophysical Connectivitymentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Integration of biophysical connectivity in the spatial optimization of coastal ecosystem services

Ospina-Álvarez

Juan

Davis

et al. 2020

Science of The Total Environment

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Shift in the larval phenology of a marine ectotherm due to ocean warming with consequences for larval transport

McGeady

Lordan

Power

2020

Limnology & Oceanography

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Because environmental temperature has an important influence on developmental rate and physiology, marine ectotherms are vulnerable to phenology changes due to ocean warming. Identifying changes to phenology, the timing of biological events, and understanding their effect on recruitment and abundance is of critical importance to establish potential population effects. We examined the larval phenology of the commercially important Norway lobster (Nephrops norvegicus) and used a larval transport model to examine its effect on simulated transport patterns. Using a model to estimate annual larval release dates based on temperature-dependent embryo incubation, an earlier shift of 17.2 d occurred between 1982-1995 and 2000-2010 in the Irish Sea, similar to an observed empirical shift in phenology of 19.1 d using historical zooplankton data sets. Despite this earlier phenology, temperature-dependent pelagic larval durations were unchanged because the water column to which larvae were released earlier had also warmed. Larval transport simulations in the western Irish Sea indicated that the phenology shift had minimal effects on larval retention and advection distance overall, because major variations were observed only at very early or late stages of the larval season, that is, times when lower proportions of larvae were present. As the western Irish Sea grounds exports small but consistent quantities of larvae to nearby populations, especially off Scotland, it may act as an important source of larvae, especially when retention of native larvae is low. Overall, larval transport tools may indicate grounds that are periodically vulnerable to recruitment failures and offer potentially valuable information in fishery management.

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Diel vertical migration and seamount stepping stones promote species connectivity from coastal to offshore insular systems in the Tropical Southwestern Atlantic

Tosetto,

Lett,

Neumann‐Leitão

et al. 2024

Limnology & Oceanography

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The recruitment of marine species in isolated oceanic island systems can be challenged by prevailing currents, as exemplified by the Tropical Southwestern Atlantic. In this region, the Fernando de Noronha ridge hosts several seamounts, the Rocas Atoll and the Fernando de Noronha Archipelago, which are home to great marine biodiversity. However, along the ridge, the central branch of the South Equatorial Current (cSEC), flowing westward, poses a challenge to the recruitment of organisms toward Fernando de Noronha. To unveil critical insights into the intricate processes shaping biodiversity in these insular ecosystems, we use a dispersal Lagrangian tool to explore the role of diel vertical migration (DVM) to depth strata influenced by the South Equatorial Undercurrent (SEUC), which flows eastward bellow the cSEC, in shaping species dispersal and metacommunity dynamics. Our results show that while not a direct journey, the DVM into SEUC‐influenced strata increases the possibility that the seamounts and the Rocas Atoll act as stepping stones between the continental shelf and Fernando de Noronha. Propagules of organisms originating primarily from the continental shelf are transported to the western seamounts of the ridge. Upon reaching the western seamounts, organisms can find suitable habitats to recruit. The progeny of these communities that migrate to SEUC‐influenced strata have the opportunity to reach suitable habitats at the Rocas Atoll and the Eastern seamounts, ultimately connecting to the Fernando de Noronha archipelago. These results provide scientific fundaments for the development of a functional network of marine protected areas in the Tropical Southwestern Atlantic.

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Larval transport in the upwelling ecosystem of central Chile: The effects of vertical migration, developmental time and coastal topography on recruitment

Cited by 38 publications

References 119 publications

Integration of biophysical connectivity in the spatial optimization of coastal ecosystem services

Integration of biophysical connectivity in the spatial optimization of coastal ecosystem services

Shift in the larval phenology of a marine ectotherm due to ocean warming with consequences for larval transport

Diel vertical migration and seamount stepping stones promote species connectivity from coastal to offshore insular systems in the Tropical Southwestern Atlantic

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