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- W2164623661 abstract "Abstract Understanding how abiotic factors influence the spatial distribution of genetic variation provides insight into microevolutionary processes. The intertidal seascape is characterized by highly heterogeneous habitats which probably influence the partitioning of genetic variation at very small scales. The effects of tidal height on genetic variation in both the haploid (gametophytes) and diploid (tetrasporophytes) stages of the red alga C hondrus crispus were studied. Fronds were sampled every 25 cm within a 5 m × 5 m grid and along a 90‐m transect at two shore heights (high and low) in one intertidal site in F rance. The multilocus genotype of 799 fronds was determined ( N haploid = 586; N diploid = 213) using eight microsatellite loci to test the following hypotheses: (i) high and low shore fronds belong to genetically differentiated populations, (ii) gene flow is restricted within the high shore habitat due to tidal‐influenced isolation and (iii) significant F IS values are driven by life history characteristics. Pairwise F ST estimates between high and low shore levels supported the hypothesis that high and low shore fronds were genetically differentiated. The high shore was characterized by the occurrence of within‐shore genetic differentiation, reduced genetic diversity and increased levels of intergametophytic selfing, suggesting it is a marginal environment. These results suggest at fine scales within the intertidal seascape the same mechanisms as those over the species’ distributional range are at work with core and marginal population dynamics." @default.
- W2164623661 created "2016-06-24" @default.
- W2164623661 creator A5010791324 @default.
- W2164623661 creator A5011314168 @default.
- W2164623661 creator A5027240356 @default.
- W2164623661 creator A5065681932 @default.
- W2164623661 date "2013-01-07" @default.
- W2164623661 modified "2023-10-15" @default.
- W2164623661 title "Intergametophytic selfing and microgeographic genetic structure shape populations of the intertidal red seaweed<i>Chondrus crispus</i>" @default.
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