Abstract
In Flanders (northern Belgium), the common (butlocally rare) P. veris and its rarerelative Primula vulgaris, twoself-incompatible perennials, mainly occur infragmented habitats of the intensively usedagricultural landscape. We investigated geneticvariation and structure for respectively 30 and27 allozyme loci in 24 and 41 populations ofP. veris and P. vulgaris, inrelation to species (local) abundance and topopulation size and plant density, and comparedpopulations of linear landscape elements(verges) with non verge populations. Therare P. vulgaris was geneticallydepauperate compared to the commoner P.veris. Both species showed a geographicalstructure of genetic variation and isolation bydistance. The scattered populations of P.veris from the Westhoek region (polderhabitats) were of smaller size, geneticallydepauperate and showed higher interpopulationdivergence compared to the Voeren region, wherepopulations are densely distributed andhabitats less fragmented. Verge and non vergepopulations showed similar populations sizesand levels of genetic variation. For bothspecies, small populations showed a loss ofgenetic variation, but still maintained highlevels of observed heterozygosity.Within-population plant density negativelyaffected allelic richness in P. veris.Ours results indicate that common species canalso be negatively affected by habitatfragmentation (perhaps even more so than rarespecies) and that verge populations can have ahigh potential conservation value. Both vergeand non-verge populations should be included inconservation efforts.
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Van Rossum, F., Campos De Sousa, S. & Triest, L. Genetic consequences of habitat fragmentation in an agricultural landscape on the common Primula veris, and comparison with its rare congener, P. vulgaris . Conservation Genetics 5, 231–245 (2004). https://doi.org/10.1023/B:COGE.0000030007.85492.70
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DOI: https://doi.org/10.1023/B:COGE.0000030007.85492.70