Landslide-facilitated species diversity in a beech-dominant forest

Kenji Seiwa, Yoshiko Miwa, Shigetoshi Akasaka, Hiroshi Kanno, Mizuki Tomita, Tomoyuki Saitoh, Naoto Ueno, Megumi Kimura, Yoichi Hasegawa, Miki Konno, Kazuhiko Masaka

    Research output: Contribution to journalArticlepeer-review

    9 Citations (Scopus)

    Abstract

    To evaluate the extent to which landslides affect community dynamics and consequent species diversity in a beech-dominated forest, differences in the composition and size structure of tree species were compared between landslide and adjacent stable (control) stands. Demography and changes in size were compared between the two stands over a 5-year period about 60 years after a landslide. In the control stand, replacement occurred even amongst late-successional species, with beech (Fagus crenata)-the most dominant species-increasing in relative abundance. In the landslide stand, very few large individuals of late-successional species occurred, whereas large individuals of early-successional species occurred only in the landslide stand. The traits indicate that the landslide strongly facilitated species diversity, not only by reducing the dominance of late-successional species, but also by promoting recruitment of early-successional species. However, new recruitment of early-successional species was inhibited in the landslide stand, although we observed succeeding regeneration and subsequent population growth of late-successional species there. As a result, the relative dominance of late-successional species increased with succession after the landslide, thus decreasing future species diversity. In beech-dominant forest landscapes in Japan that include communities with different developmental stages, the mosaic of serial stages may facilitate species diversity after a landslide.

    Original languageEnglish
    Pages (from-to)29-41
    Number of pages13
    JournalEcological Research
    Volume28
    Issue number1
    DOIs
    Publication statusPublished - 2013 Jan

    Keywords

    • Community dynamics
    • Fagus crenata
    • Regeneration
    • Replacement
    • Succession

    ASJC Scopus subject areas

    • Ecology, Evolution, Behavior and Systematics

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