Genetic effects of chronic habitat fragmentation in a wind-pollinated tree

Alistair S. Jump, Josep Peñuelas

    Research output: Contribution to journalArticleResearchpeer-review

    206 Citations (Scopus)

    Abstract

    Habitat fragmentation poses a serious threat to plants through genetic changes associated with increased isolation and reduced population size. However, the longevity of trees, combined with effective seed or pollen dispersal, can enhance their resistance to these effects. The European beech (Fagus sylvatica) dominates forest over large regions of Europe. We demonstrate that habitat fragmentation in this species has led to genetic bottlenecks and the disruption of the species' breeding system, leading to significantly elevated levels of inbreeding, population divergence, and reduced genetic diversity within populations. These results show that, in contrast with the findings of previous studies, forest fragmentation has a negative genetic impact, even in this widespread, wind-pollinated tree. The identification of significant effects of forest fragmentation in beech demonstrates that trees are not at reduced risk from environmental change. This should be accounted for in the management of remaining natural and seminatural forest throughout the world. © 2006 by The National Academy of Sciences of the USA.
    Original languageEnglish
    Pages (from-to)8096-8100
    JournalProceedings of the National Academy of Sciences of the United States of America
    Volume103
    Issue number21
    DOIs
    Publication statusPublished - 23 May 2006

    Keywords

    • F-statistics
    • Forest fragmentation
    • Inbreeding
    • Isolation by distance
    • Population genetics

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