Genetic differentiation among populations of the beetle Bolitophagus reticulatus (Coleoptera: Tenebrionidae) in a fragmented and a continuous landscape

Article Abstract:

Genetic differentiation for populations of the beetle Bolitophagus reticulatus (Coleoptera: Tenebrionidae) has been studied in a European landscape with agricultural areas surrounding forest fragments and a continuous old-forest one. Significant genetic differences were seen among local populations. On average, however, differentiation in the fragmented area was three times that of the continuous one. A genetic isolation effect of habitat fragmentation is strongly suggested.

Habitat partitioning (Biology), Habitat partitioning (Ecology), Beetles, Forest ecology

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Genetic evidence for mixed origin of recolonized sea trout populations

Article Abstract:

Mixed origins of recolonized sea trout populations are discussed based on genetic evidence. A study was carried out to find out whether extinctions caused by acid precipitation in southern Norway and the recovery after deacidification have had an effect on the genetic constitution of anadromous brown trout. No samples from the period before the acidification are available, so genetic differentiation patterns among established and recently recolonized sea trout streams are compared.

Reports, Environmental aspects, Trout, Acid rain, Acid deposition

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Host-plant-associated genetic differentiation in Northern French populations of the European corn borer

Article Abstract:

Research has been conducted on phytophagous insects feeding on different types of crop and on weeds. The authors have investigated European corn borer populations' genetic variability, have determined the geographical distribution of these populations, and have used the combination of mitochondrial DNA sequence analysis and allozyme electrophoresis in examining the role of host association in genetic structure of the populations.

France, Science & research, Methods, Analysis, Demographic aspects, Genomes, Mitochondrial DNA, Methodology, Research methods, Structure, Host plants, Corn borers

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