Climate change and population genetic structure of marine species

Brutto, Sabrina Lo; Arculeo, Marco; Grant, W. Stewart

doi:10.1080/02757540.2010.547486

Cited by 18 publications

(10 citation statements)

References 89 publications

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“…In fact, adaptive diversity denotes the evolutionary potential of populations, affecting their ability to persist in nature and to undergo adaptation in response to environmental changes, stress and diseases (Lo Brutto et al . ), including human‐induced environmental changes and stock overexploitation. The idea to incorporate information on ecological traits in identifying conservation units has been promoted to preserve evolutionary resilience in the wild (Gebremedhin et al .…”

Section: Discussionmentioning

confidence: 99%

Outlier SNP markers reveal fine‐scale genetic structuring across European hake populations (Merluccius merluccius)

Babbucci²,

et al. 2013

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Shallow population structure is generally reported for most marine fish and explained as a consequence of high dispersal, connectivity and large population size. Targeted gene analyses and more recently genome-wide studies have challenged such view, suggesting that adaptive divergence might occur even when neutral markers provide genetic homogeneity across populations. Here, 381 SNPs located in transcribed regions were used to assess large- and fine-scale population structure in the European hake (Merluccius merluccius), a widely distributed demersal species of high priority for the European fishery. Analysis of 850 individuals from 19 locations across the entire distribution range showed evidence for several outlier loci, with significantly higher resolving power. While 299 putatively neutral SNPs confirmed the genetic break between basins (F(CT) = 0.016) and weak differentiation within basins, outlier loci revealed a dramatic divergence between Atlantic and Mediterranean populations (F(CT) range 0.275-0.705) and fine-scale significant population structure. Outlier loci separated North Sea and Northern Portugal populations from all other Atlantic samples and revealed a strong differentiation among Western, Central and Eastern Mediterranean geographical samples. Significant correlation of allele frequencies at outlier loci with seawater surface temperature and salinity supported the hypothesis that populations might be adapted to local conditions. Such evidence highlights the importance of integrating information from neutral and adaptive evolutionary patterns towards a better assessment of genetic diversity. Accordingly, the generated outlier SNP data could be used for tackling illegal practices in hake fishing and commercialization as well as to develop explicit spatial models for defining management units and stock boundaries.

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Section: Discussionmentioning

confidence: 99%

Outlier SNP markers reveal fine‐scale genetic structuring across European hake populations (Merluccius merluccius)

Babbucci²,

et al. 2013

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“…On the other hand, phylogeographic patterns with a clear geographic component are relatively common and easy to detect in terrestrial and/or freshwater species due to the intimately fragmented nature of their habitats [2]. Phylogeographic patterns in species living in the transition area between sea and land (supralittoral zone) have received relatively little attention compared to the wealth of work done on marine and terrestrial species [3-6]. However, a proper understanding of the evolutionary trajectories governing coastal communities is fundamental, especially in light of the increasing pressure that human beings have been exerting on them in the last decades [7].…”

Section: Introductionmentioning

confidence: 99%

Genetic connectivity between land and sea: the case of the beachflea Orchestia montagui (Crustacea, Amphipoda, Talitridae) in the Mediterranean Sea

et al. 2013

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IntroductionWe examined patterns of genetic divergence in 26 Mediterranean populations of the semi-terrestrial beachflea Orchestia montagui using mitochondrial (cytochrome oxidase subunit I), microsatellite (eight loci) and allozymic data. The species typically forms large populations within heaps of dead seagrass leaves stranded on beaches at the waterfront. We adopted a hierarchical geographic sampling to unravel population structure in a species living at the sea-land transition and, hence, likely subjected to dramatically contrasting forces.ResultsMitochondrial DNA showed historical phylogeographic breaks among Adriatic, Ionian and the remaining basins (Tyrrhenian, Western and Eastern Mediterranean Sea) likely caused by the geological and climatic changes of the Pleistocene. Microsatellites (and to a lesser extent allozymes) detected a further subdivision between and within the Western Mediterranean and the Tyrrhenian Sea due to present-day processes. A pattern of isolation by distance was not detected in any of the analyzed data set.ConclusionsWe conclude that the population structure of O. montagui is the result of the interplay of two contrasting forces that act on the species population genetic structure. On one hand, the species semi-terrestrial life style would tend to determine the onset of local differences. On the other hand, these differences are partially counter-balanced by passive movements of migrants via rafting on heaps of dead seagrass leaves across sites by sea surface currents. Approximate Bayesian Computations support dispersal at sea as prevalent over terrestrial regionalism.

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“…In the marine realm, climatic changes have shifted the chemical and biological properties of many marine systems and the geographical distances are associated with the temperature and salinity gradients (Lo Brutto et al, 2011). The ecological plasticity of Brachidontes has likely played an important role in the persistence of B. pharaonis in the Mediterranean coasts (Apte et al, 2000).…”

Section: Discussionmentioning

confidence: 99%

Molecular analysis of Brachidonte spharaonis (Fischer P., 1870) in Egypt reveals cryptic species complex.

Radwan

Morsy

Ahmed

et al. 2014

Egypt. J. of Aquatic Biolo. and Fish.

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Species and genetic diversity of the migrant Brachidonte spharaonis bivalve were studied along the Egyptian waters in order to determine the phylogenetic status of the species and to detect speciation with geographical isolation. Samples were collected from the Red Sea, Mediterranean Sea and Suez Canal. Genetic diversity was estimated using the DNA barcoding technique for mitochondrial CO1 gene. The DNA barcoding results showed that B. pharaonis collected from different localities were clustered in different clades indicating that the B. pharaonis population in the Egyptian coasts might form a cryptic species complex rather than a population of one species. These results may have a great impact on the conservation and fisheries status of B. pharaonis in the Egyptian waters.

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Climate change and population genetic structure of marine species

Cited by 18 publications

References 89 publications

Outlier SNP markers reveal fine‐scale genetic structuring across European hake populations (Merluccius merluccius)

Outlier SNP markers reveal fine‐scale genetic structuring across European hake populations (Merluccius merluccius)

Genetic connectivity between land and sea: the case of the beachflea Orchestia montagui (Crustacea, Amphipoda, Talitridae) in the Mediterranean Sea

Molecular analysis of Brachidonte spharaonis (Fischer P., 1870) in Egypt reveals cryptic species complex.

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