Independence of neutral and adaptive divergence in a low dispersal marine mollusc

Mariani, Stefano; Peijnenburg, Katja T. C. A.; Weetman, David

doi:10.3354/meps09507

Cited by 25 publications

(37 citation statements)

References 70 publications

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“…; Mariani et al. ) and on populations separated by approximately one hundred meters. Nevertheless, considering the limitations linked to the RTE and the P ST ‐ F ST comparisons, complementary studies involving replication at the population level (see Kawecki and Ebert ) or genomic approach (Palumbi et al.…”

Section: Discussionmentioning

confidence: 99%

Potential for adaptive evolution at species range margins: contrasting interactions between red coral populations and their environment in a changing ocean

Ledoux

Aurelle

Bensoussan

et al. 2015

Ecology and Evolution

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Studying population-by-environment interactions (PEIs) at species range margins offers the opportunity to characterize the responses of populations facing an extreme regime of selection, as expected due to global change. Nevertheless, the importance of these marginal populations as putative reservoirs of adaptive genetic variation has scarcely been considered in conservation biology. This is particularly true in marine ecosystems for which the deep refugia hypothesis proposes that disturbed shallow and marginal populations of a given species can be replenished by mesophotic ones. This hypothesis therefore assumes that identical PEIs exist between populations, neglecting the potential for adaptation at species range margins. Here, we combine reciprocal transplant and common garden experiments with population genetics analyses to decipher the PEIs in the red coral, Corallium rubrum. Our analyses reveal partially contrasting PEIs between shallow and mesophotic populations separated by approximately one hundred meters, suggesting that red coral populations may potentially be locally adapted to their environment. Based on the effective population size and connectivity analyses, we posit that genetic drift may be more important than gene flow in the adaptation of the red coral. We further investigate how adaptive divergence could impact population viability in the context of warming and demonstrate differential phenotypic buffering capacities against thermal stress. Our study questions the relevance of the deep refugia hypothesis and highlights the conservation value of marginal populations as a putative reservoir of adaptive genetic polymorphism.

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Section: Discussionmentioning

confidence: 99%

Potential for adaptive evolution at species range margins: contrasting interactions between red coral populations and their environment in a changing ocean

Ledoux

Aurelle

Bensoussan

et al. 2015

Ecology and Evolution

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“…Such information is fundamental to understand eco-evolutionary processes (Slatkin, 1987) and can be useful for the conservation of intraspecific biodiversity in the case of vulnerable or highly exploited species (Hilborn et al, 2003;Mariani et al, 2012). While advances in molecular biology are providing increased resolution of biocomplexity among marine taxa, there remains a major demand to obtain reliable and informative biological information for a plethora of populations/species at low operational costs for management and conservation purposes (Frankham, 2010).…”

Section: Introductionmentioning

confidence: 99%

“…While advances in molecular biology are providing increased resolution of biocomplexity among marine taxa, there remains a major demand to obtain reliable and informative biological information for a plethora of populations/species at low operational costs for management and conservation purposes (Frankham, 2010). As such, comparative studies of morphological and genetic divergence can still have an important contribution to biodiversity conservation (Strange et al, 2008;Mariani et al, 2012).…”

Section: Introductionmentioning

confidence: 99%

Congruent Molecular and Morphological Diversity of Macaronesian Limpets: Insights into eco-evolutionary Forces and Tools for Conservation

Carreira¹,

Shaw

Gonçalves

et al. 2017

Front. Mar. Sci.

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Combined analysis of genetic and morphological variation can provide synergistic insights into eco-evolutionary forces shaping biodiversity, as well as tools for conservation and management. Macaronesian limpets are undergoing severe declines due to overexploitation which calls for an evaluation of the evolutionary significance and taxonomic status of populations. This study details the analysis of genetic (mtDNA sequencing) and morphological (geometric analysis of shell shape) variation among Macaronesian populations of Patella aspera, P. rustica, and P. candei. In the case of P. aspera and P. rustica, this also included analysis of mainland conspecifics. mtDNA revealed distinct phylogeographic patterns for the three species. For both P. aspera and P. rustica Macaronesian and continental samples were reciprocally monophyletic, with shallower, and distinct, phylogeographic structure within both clades. For P. candei, the Macaronesian endemic, three reciprocally monophyletic groups corresponding to (i) the Azores, (ii) Madeira and (iii) Selvagens and Canary Islands were resolved. The different patterns for each species are compatible with independent processes of colonization and demographic processes. Morphological differentiation matched the major phylogeographic groupings (i.e., Macaronesian v Continent for P. aspera and P. rustica; Azores/Madeira/Selvagens and Canary Islands for P. candei) compatible with such variation being shaped by genetic drift associated with distinct demographic histories of lineages as well as historical/recurrent selection pressures. The genetic/morphological congruence supports the formal recognition of at least three described P. candei subspecies. Moreover, the data prompt recommendation of the separate management of limpets from each archipelago. At present management efforts are hampered by illegal harvesting of limpets. From an applied viewpoint, this study confirms that morphology retains useful information on genetic status and thus represents a potentially cheap method applicable to limpet conservation.

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“…() and Mariani et al. () observed that genetic differentiation of the common whelk increased with geographic distance.…”

Section: Introductionmentioning

confidence: 95%

“…In more recent studies, sexual dimorphism has been demonstrated in populations on both sides of the N‐Atlantic, where females have on average higher and heavier shells (Kenchington & Glass, ; Ten Hallers‐Tjabbes, ). Thomas and Himmelman () linked increased shell thickness and elongated apertures of Canadian common whelk with lobster and crab predation, and phenotypic differentiation in shell morphology of common whelk around Ireland appears to be driven by environmental variation (Mariani et al., ). Genetic analysis of migration trends in three locations in the UK indicated an inshore–offshore migration of whelk, which could be linked to inshore–offshore gradients in environmental variables (Weetman et al., ).…”

Section: Introductionmentioning

confidence: 99%

Shell morphology and color of the subtidal whelk Buccinum undatum exhibit fine‐scaled spatial patterns

Magnúsdóttir

Pálsson

Westfall

et al. 2018

Ecology and Evolution

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Geographical patterns in morphology can be the result of divergence among populations due to neutral or selective changes and/or phenotypic plasticity in response to different environments. Marine gastropods are ideal subjects on which to explore these patterns, by virtue of the remarkable intraspecific variation in life‐history traits and morphology often observed across relatively small spatial scales. The ubiquitous N‐Atlantic common whelk (Buccinum undatum) is well known for spatial variation in life‐history traits and morphology. Previous studies on genetic population structure have revealed that it exhibits significant differentiation across geographic distances. Within Breiðafjörður Bay, a large and shallow bay in W‐Iceland, genetic differentiation was demonstrated between whelks from sites separated by just 20 km. Here, we extended our previous studies on the common whelk in Breiðafjörður Bay by quantifying phenotypic variation in shell morphology and color throughout the Bay. We sought to test whether trait differentiation is dependent on geographic distance and/or environmental variability. Whelk in Breiðafjörður Bay displayed fine‐scale patterns of spatial variation in shape, thickness, and color diversity. Differentiation increased with increasing distance between populations, indicating that population connectivity is limited. Both shape and color varied along a gradient from the inner part of the bay in the east to the outer part in the west. Whelk shells in the innermost part of Breiðafjörður Bay were thick with an elongate shell, round aperture, and low color diversity, whereas in the outer part of the bay the shells were thinner, rounder, with a more elongate aperture and richer color diversity. Significant site‐specific difference in shell traits of the common whelk in correlation with environmental variables indicates the presence of local ecotypes and limited demographic connectivity.

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Independence of neutral and adaptive divergence in a low dispersal marine mollusc

Cited by 25 publications

References 70 publications

Potential for adaptive evolution at species range margins: contrasting interactions between red coral populations and their environment in a changing ocean

Potential for adaptive evolution at species range margins: contrasting interactions between red coral populations and their environment in a changing ocean

Congruent Molecular and Morphological Diversity of Macaronesian Limpets: Insights into eco-evolutionary Forces and Tools for Conservation

Shell morphology and color of the subtidal whelk Buccinum undatum exhibit fine‐scaled spatial patterns

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