Isolation by Distance in Equilibrium and Nonequilibrium Populations of Four Talitrid Species in the Mediterranean Sea

Matthaeis, Elvira De; Davolos, Domenico; Cobolli, Marina; Ketmaier, Valerio

doi:10.1554/0014-3820(2000)054[1606:ibdiea]2.0.co;2

Cited by 18 publications

(16 citation statements)

References 32 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Similar levels of divergence have been found among morphologically distinct species of the talidrid amphipod Orchestia (D = 0.51-0.59) (Conceição, Bishop & Thorpe, 1998;De Matthaeis et al, 2000) and are similar to reported divergence among congeneric species of other Crustacea (Hedgecock, Tracey & Nelson, 1982;Stewart, 1993;Thorpe & Solé-Cava, 1994). Such patterns may also explain, to a lesser extent, the genetic similarity of P. excavatum on CIS to southern populations from PE3 (Fig.…”

Section: Speciation Through Allopatric Isolationsupporting

confidence: 85%

Population genetic structure of New Zealand's endemic corophiid amphipods: evidence for allopatric speciation

Stevens¹,

Hogg²

2004

Biological Journal of the Linnean Society

111

View full text Add to dashboard Cite

Allozyme electrophoresis was used to examine population genetic structure at inter-and intraspecific levels for the New Zealand endemic corophiid amphipods, Paracorophium lucasi and P. excavatum. Individuals were collected from estuarine and freshwater habitats from North, South and Chatham Islands. Analyses of genetic structure among interspecific populations indicated clear allelic differentiation between the two Paracorophium species (Nei's genetic distance, D = 1.62), as well as considerable intraspecific substructuring (D = 0.15-0.65). These levels of divergence are similar to interspecific levels for other amphipods and it is proposed that at least two groups from the P. lucasi complex and three from the P. excavatum complex correspond to sibling species. In most cases allopatry can account for the differentiation among the putative sibling species. For populations that share a common coastline we found low levels of differentiation and little or no correlation with geographical distance, suggesting that gene flow is adequate to maintain homogeneous population genetic structure. By contrast, populations on separate coastlines (i.e. isolated by land) showed moderate levels of geographical differentiation indicating restricted gene flow. The juxtaposition of population genetic and biogeographical data for Paracorophium in conjunction with the geological record infers past histories of glacial extirpation, and possible isolating effects of sea-level and landmass changes that have occurred throughout the Plio-Pleistocene.

show abstract

Section: Speciation Through Allopatric Isolationsupporting

confidence: 85%

Population genetic structure of New Zealand's endemic corophiid amphipods: evidence for allopatric speciation

Stevens¹,

Hogg²

2004

Biological Journal of the Linnean Society

111

View full text Add to dashboard Cite

show abstract

“…Increasing geographical distance is expected to enhance isolation by distance (IBD) among populations (Palumbi 1994), so this factor has been implicated by several authors as a causative agent of population subdivision (Pérez-Losada et al . 1999;De Matthaeis et al . 2000;Mariani et al .…”

Section: Introductionmentioning

confidence: 99%

Testing hypotheses of population structuring in the Northeast Atlantic Ocean and Mediterranean Sea using the common cuttlefish Sepia officinalis

et al. 2007

View full text Add to dashboard Cite

Population structuring in species inhabiting marine environments such as the Northeast Atlantic Ocean (NEA) and Mediterranean Sea (MS) has usually been explained based on past and present physical barriers to gene flow and isolation by distance (IBD). Here, we examined the relative importance of these factors on population structuring of the common cuttlefish Sepia officinalis by using methods of phylogenetic inference and hypothesis testing coupled with coalescent and classical population genetic parameter estimation. Individuals from 10 Atlantic and 15 Mediterranean sites were sequenced for 659 bp of the mitochondrial COI gene (259 sequences). IBD seems to be the main factor driving present and past genetic structuring of Sepia populations across the NEA-MS, both at large and small geographical scales. Such an evolutionary process agrees well with some of the biological features characterizing this cuttlefish species (short migrations, nektobenthic habit, benthic eggs hatching directly to benthic juveniles). Despite the many barriers to migration/gene flow suggested in the NEA-MS region, genetic population fragmentation due to past isolation of water masses (Pleistocene; 0.56 million years ago) and/or present-day oceanographic currents was only detected between the Aegean-Ionian and western Mediterranean Seas. Restricted gene flow associated with the Almería-Oran hydrographic front was also suggested between southern and eastern Spanish populations. Distinct population boundaries could not be clearly determined, except for the Aegean-Ionian stock. Two Atlantic and five Mediterranean samples showed evidence of current decline in genetic diversity, which may indicate over-exploitation of Sepia in both marine regions.

show abstract

“…De Matthaeis et al . (1998, 2000), nevertheless, found evidence of considerable gene flow in the congener O. montagui and the related species Platorchestia platensis (although not in Orchestia stephenseni ) among several isolated islands (interisland distances in excess of 30–40 km) in the Aegean and Tyrrhenian Seas of the Mediterranean. De Matthaeis et al .…”

Section: Introductionmentioning

confidence: 99%

“…De Matthaeis et al . (1998, 2000) attributed this gene flow to dispersal on drifting algae and wood, as patterns of gene flow seem to roughly correspond to surface currents. Many Orchestia species, including O. gammarellus, are commonly found in and under drift algae high on the beach, suggesting that rafting may be a plausible dispersal mechanism.…”

Section: Introductionmentioning

confidence: 99%

The biogeography of the beachflea, Orchestia gammarellus (Crustacea, Amphipoda, Talitridae), in the North Atlantic with special reference to Iceland: a morphometric and genetic study

Henzler¹,

Ingólfsson²

2007

Zoologica Scripta

View full text Add to dashboard Cite

57 Henzler, C. M. & Ingólfsson, A. (2008). The biogeography of the beachflea, Orchestia gammarellus (Crustacea, Amphipoda, Talitridae), in the North Atlantic with special reference to Iceland: a morphometric and genetic study. -Zoologica Scripta, 37, 57-70. The beachflea [Orchestia gammarellus (Pallas)] is a trans-Atlantic amphipod inhabiting the littoral fringe. In Iceland, its distribution is temperature-limited; it has recently colonized Iceland's relatively warm south-western coast, and in the cooler north-west, several small populations inhabit isolated warm springs. We address two questions: (i) Do the warm spring populations show evidence of long-term residence in Iceland, or of recent colonization? (ii) For the new south-western Icelandic populations, can the source population be determined? We sequenced COI for 22 populations in Iceland, Nova Scotia, the Faroe Islands, the British Isles, Norway and Sweden. Morphometric analysis of a subset of populations assessed 16 continuous and five discrete characters. Genetically, we found a star phylogeny: a common haplotype was found at all sites except two neighbouring warm spring populations, and all haplotypes were within two base pairs of this common haplotype. Morphometrically, almost all populations examined differed significantly in some characters; however, the warm spring populations differed slightly more from each other than did other populations. Although the origins of the Icelandic populations could not be well resolved, our data are consistent with a recent European origin.

show abstract

Isolation by Distance in Equilibrium and Nonequilibrium Populations of Four Talitrid Species in the Mediterranean Sea

Cited by 18 publications

References 32 publications

Population genetic structure of New Zealand's endemic corophiid amphipods: evidence for allopatric speciation

Population genetic structure of New Zealand's endemic corophiid amphipods: evidence for allopatric speciation

Testing hypotheses of population structuring in the Northeast Atlantic Ocean and Mediterranean Sea using the common cuttlefish Sepia officinalis

The biogeography of the beachflea, Orchestia gammarellus (Crustacea, Amphipoda, Talitridae), in the North Atlantic with special reference to Iceland: a morphometric and genetic study

Contact Info

Product

Resources

About