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Life on the margin: genetic isolation and diversity loss in a peripheral marine ecosystem, the Baltic Sea.
Marginal populations are often isolated and under extreme selection pressures resulting in anomalous genetics. Consequently, ecosystems that are geographically and ecologically marginal might have aExpand
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The Bare Zone of Swedish Rocky Shores: Why Is It There?
Rocky shores world-wide are characterized by two factors; low species richness and zonation of dominant species, both related to changing water levels. In Swedish waters, sea level fluctuates by upExpand
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The paradox of Rockall: why is a brooding gastropod (Littorina saxatilis) more widespread than one having a planktonic larval dispersal stage (L. littorea)?
In benthic invertebrates dispersal of planktotrophic larvae is generally considered more effective than is, for example, the rafting of adults or egg masses. It is certainly true that over shortExpand
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Evolution in Littorina: ecology matters
Organisms of marine rocky shores are exposed to physical stress from abiotic factors, such as temperature, salinity and wave action. These factors vary over compressed temporal and spatial scales,Expand
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MORPHOLOGICAL DIFFERENTIATION AND GENETIC COHESIVENESS OVER A MICROENVIRONMENTAL GRADIENT IN THE MARINE SNAIL LITTORINA SAXATILIS
The marine gastropod Littorina saxatilis has different ecotypes in shores only a few meters apart. This has both taxonomic and evolutionary implications. Here we report on an extreme type ofExpand
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GENETIC AND MORPHOLOGICAL IDENTIFICATION OF FUCUS RADICANS SP. NOV. (FUCALES, PHAEOPHYCEAE) IN THE BRACKISH BALTIC SEA 1
Brown seaweeds of the genus Fucus occupy a wide variety of temperate coastal habitats. The genus is evolutionary dynamic with recent radiations to form morphologically distinct taxa. In the brackishExpand
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Repeated evolution of reproductive isolation in a marine snail: unveiling mechanisms of speciation
Distinct ecotypes of the snail Littorina saxatilis, each linked to a specific shore microhabitat, form a mosaic-like pattern with narrow hybrid zones in between, over which gene flow is 10–30% ofExpand
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Mechanisms of incomplete prezygotic reproductive isolation in an intertidal snail: testing behavioural models in wild populations
Two morphs (ecotypes) of the marine snail Littorina saxatilis coexist along Galician exposed rocky shores. They hybridize, but gene flow is impeded by a partial prezygotic reproductive barrier, andExpand
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INCIPIENT REPRODUCTIVE ISOLATION BETWEEN TWO SYMPATRIC MORPHS OF THE INTERTIDAL SNAIL LITTORINA SAXATILIS
The study of speciation in recent populations is essentially a study of the evolution of reproductive isolation mechanisms between sub‐groups of a species. Prezygotic isolation can be of centralExpand
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Snails and their trails: the multiple functions of trail‐following in gastropods
Snails are highly unusual among multicellular animals in that they move on a layer of costly mucus, leaving behind a trail that can be followed and utilized for various purposes by themselves or byExpand
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