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We assessed the effects of habitat fragmentation on the demography of the locally abundant, long-lived fen plant Swertia perennis L., by examining population structure, components of fitness and herbivory of 17 populations in Switzerland. We distinguished between large MAIN, small, barely isolated NEAR and small, geographically isolated DISTANT habitat islands. Large isolation distance of small sites...
We studied population viability in relation topopulation size and allelic variation in thenarrowly-endemic, monocarpic perennial plantCochlearia bavarica in Bavaria. In 1996,we analysed allelic variation by allozymeelectrophoresis in 24 populations ranging from8–2000 flowering individuals. Fitness-relatedcharacters were investigated in 22 of the 24populations in the field in 1996 (reproductiveand...
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