On-shelf larval retention limits population connectivity in a coastal broadcast spawner

Teske, Peter R.; Sandoval‐Castillo, Jonathan; Sebille, Erik van; Waters, Jonathan M.; Beheregaray, Luciano B.

doi:10.3354/meps11362

Cited by 44 publications

(49 citation statements)

References 75 publications

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“…The fact that dated divergence events in most previous studies were ancient (Middle Pleistocene or older) gives credence to idea that mtDNA fails to identify congruent phylogeographical breaks that evolved, for example, during the Holocene. However, although the microsatellite data from the two high‐dispersal gastropods contained sufficient signal not only to detect genetic differentiation between sites, but also to identify positive correlations between genetic and geographical distances (Teske et al ., ), there was no compelling evidence that genetic structure was linked to a priori marine phylogeographical barriers identified in previous studies. Instead, our results suggest that such apparent ‘barriers’ have no effect on some taxa.…”

Section: Discussionmentioning

confidence: 97%

An overview of Australia's temperate marine phylogeography, with new evidence from high‐dispersal gastropods

Teske

Sandoval‐Castillo

Waters

et al. 2016

Journal of Biogeography

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Aim We provide an overview of the location and ages of coastal phylogeographical breaks in southern Australian planktonic dispersers, and test the hypothesis that the absence of such breaks in some species is an artefact of insufficient resolution of genetic markers when such breaks evolved comparatively recently. Location Temperate coastal Australia. Methods We generated a large (> 1500 individuals) data set from rapidly evolving microsatellite markers for two codistributed Australian coastal gastropods, and compared it with mitochondrial DNA data. Both study species, the snail Nerita atramentosa and the limpet Siphonaria diemenensis, have long planktonic dispersal phases, and neither taxon exhibits substantial regional genetic structure on the basis of mitochondrial DNA. We tested for the presence of genetic structure by means of AMOVA, Bayesian clustering (structure) and iterated realloction (flock). Results There was no compelling evidence for the existence of more than one evolutionary lineage in either species. Main conclusions Discrepancies in the phylogeographical structuring of co‐distributed intertidal taxa cannot be attributed to insufficient marker resolution for the two species considered here, and likely reflect a combination of abiotic and biotic factors that include porous dispersal barriers, life history and species age/history. It appears that contemporary oceanography does not explain the presence of phylogeographical breaks, but may serve to maintain breaks that evolved earlier. Deep genetic divergence in some of the previously studied coastal invertebrates suggests that these could be cryptic species, in which case competitive exclusion may play a role in constraining species biogeography.

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Section: Discussionmentioning

confidence: 97%

An overview of Australia's temperate marine phylogeography, with new evidence from high‐dispersal gastropods

Teske

Sandoval‐Castillo

Waters

et al. 2016

Journal of Biogeography

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“…; Teske et al . ,b). In this case, the absence of local genetic structure and relatedness at the reef scale points to substantial distant recruitment.…”

Section: Discussionmentioning

confidence: 99%

“…; Teske et al . ), as long as adequately replicated sampling designs and appropriate analytical approaches are used (Hauser & Carvalho ).…”

Section: Introductionmentioning

confidence: 99%

Contrasting patterns of population connectivity between regions in a commercially important mollusc Haliotis rubra: integrating population genetics, genomics and marine LiDAR data

Miller

Rooyen²,

Rašić

et al. 2016

Molecular Ecology

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Estimating contemporary genetic structure and population connectivity in marine species is challenging, often compromised by genetic markers that lack adequate sensitivity, and unstructured sampling regimes. We show how these limitations can be overcome via the integration of modern genotyping methods and sampling designs guided by LiDAR and SONAR data sets. Here we explore patterns of gene flow and local genetic structure in a commercially harvested abalone species (Haliotis rubra) from southeastern Australia, where the viability of fishing stocks is believed to be dictated by recruitment from local sources. Using a panel of microsatellite and genomewide SNP markers, we compare allele frequencies across a replicated hierarchical sampling area guided by bathymetric LiDAR imagery. Results indicate high levels of gene flow and no significant genetic structure within or between benthic reef habitats across 1400 km of coastline. These findings differ to those reported for other regions of the fishery indicating that larval supply is likely to be spatially variable, with implications for management and long-term recovery from stock depletion. The study highlights the utility of suitably designed genetic markers and spatially informed sampling strategies for gaining insights into recruitment patterns in benthic marine species, assisting in conservation planning and sustainable management of fisheries.

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“…However, broadcast spawners are often not demographically panmictic throughout their ranges (Selkoe & Toonen, ). Mounting evidence suggest that broadcast spawners show genetic differentiation associated with variation in environmental factors such as coastal topography (Banks et al., ), habitat availability (Selkoe, Gaggiotti, Bowen, & Toonen, ) and ocean currents (Piggott, Banks, Tung, & Beheregaray, ; Teske, Sandoval‐Castillo, van Sebille, Waters, & Beheregaray, , ). Our target species, the greenlip abalone ( Haliotis laevigata ), is a benthic reef gastropod from southern mainland Australia and northern Tasmania (Hart, Fabris, Strain, Davidson, & Brown, ).…”

Section: Introductionmentioning

confidence: 99%

Seascape genomics reveals adaptive divergence in a connected and commercially important mollusc, the greenlip abalone (Haliotis laevigata), along a longitudinal environmental gradient

et al. 2018

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Populations of broadcast spawning marine organisms often have large sizes and are exposed to reduced genetic drift. Under such scenarios, strong selection associated with spatial environmental heterogeneity is expected to drive localized adaptive divergence, even in the face of connectivity. We tested this hypothesis using a seascape genomics approach in the commercially important greenlip abalone (Haliotis laevigata). We assessed how its population structure has been influenced by environmental heterogeneity along a zonal coastal boundary in southern Australia linked by strong oceanographic connectivity. Our data sets include 9,109 filtered SNPs for 371 abalones from 13 localities and environmental mapping across ~800 km. Genotype-environment association analyses and outlier tests defined 8,786 putatively neutral and 323 candidate adaptive loci. From a neutral perspective, the species is better represented by a metapopulation with very low differentiation (global F = 0.0081) and weak isolation by distance following a stepping-stone model. For the candidate adaptive loci, however, model-based and model-free approaches indicated five divergent population clusters. After controlling for spatial distance, the distribution of putatively adaptive variation was strongly correlated to selection linked to minimum sea surface temperature and oxygen concentration. Around 80 candidates were annotated to genes with functions related to high temperature and/or low oxygen tolerance, including genes that influence the resilience of abalone species found in other biogeographic regions. Our study includes a documented example about the uptake of genomic information in fisheries management and supports the hypothesis of adaptive divergence due to coastal environmental heterogeneity in a connected metapopulation of a broadcast spawner.

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On-shelf larval retention limits population connectivity in a coastal broadcast spawner

Cited by 44 publications

References 75 publications

An overview of Australia's temperate marine phylogeography, with new evidence from high‐dispersal gastropods

An overview of Australia's temperate marine phylogeography, with new evidence from high‐dispersal gastropods

Contrasting patterns of population connectivity between regions in a commercially important mollusc Haliotis rubra: integrating population genetics, genomics and marine LiDAR data

Seascape genomics reveals adaptive divergence in a connected and commercially important mollusc, the greenlip abalone (Haliotis laevigata), along a longitudinal environmental gradient

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