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  • 1
    Electronic Resource
    Electronic Resource
    Community dynamics of Ogawa Forest Reserve, a species rich deciduous forest, central Japan (1992)
    Springer
    Plant ecology 103 (1992), S. 105-112 
    Details
    ISSN: 1573-5052
    Keywords: Canopy gap ; Community dynamics ; Deciduous forest ; Disturbance ; Ogawa Forest Reserve ; Permanent plot
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract Forest community dynamics were studied for 4 years in a 6 ha permanent plot of species rich, old-growth, temperate deciduous forest in Ogawa Forest Reserve, central Japan. The gap formation rate, recruitment, mortality, gain and loss rate in basal area during 4 years were 42 m2 ha−1 yr−1, 1.74% yr−1, 1.19% yr−1, 1.12% yr−1 and 0.88% yr−1, respectively. The turnover time calculated from them ranged from 58 to 240 years. Both the mortality and mortality factors were size dependent; trees in middle size class had smallest mortality, and the proportion of the trees killed by disturbances increased with size. Gap creations were concentrated in a particular year, suggesting a large heterogeneity in time. Spatial distribution of recruited trees were biassed to the old gaps (older than 4 years), especially that of the species with Bell-shaped dbh distribution (shade intolerant) strongly associated with the gaps. Recruitment in tree stems and the loss of basal area, thus had the larger variability than mortality of stems and this forest, and the species with L-shaped dbh distribution seemed to going to increase the importance in the future if the present trend continues to be held. The turnover time of population is positively correlated with the maximum dbh size of the species, indicating the slow change of the population of large sized species.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00047696
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  • 2
    Electronic Resource
    Electronic Resource
    Community structure of a species-rich temperate forest, Ogawa Forest Reserve, central Japan (1992)
    Springer
    Plant ecology 98 (1992), S. 97-111 
    Details
    ISSN: 1573-5052
    Keywords: Guild structure ; Historical events ; Non-equilibrium coexistence ; Regeneration niche ; Markov model
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract Species assembly and niche differentiation were studied, and future species composition was predicted by simple Markov models, in an old-growth deciduous forest at the Ogawa Forest Reserve in central Japan. The dominant species in our 6ha study site are Quercus serrata, Fagus japonica, and F. crenata. An ordination by population parameters revealed four different combination 3 of life forms and regeneration niches. Cluster analysis based on interspecific spatial correlation revealed three groups of species. The species in cluster A, such as F. japonica, occurred at the bottom of the valley, while those in cluster B, such as Q. serrata, occurred along ridges. Species in cluster C, such as F. crenata, did not show any particular habitat preference. Clusters B and C were further divided into three smaller clusters (a-c). Both clusters Ba and Bb included shade intolerant species. Species in cluster Ba had large clump sizes (〉1500 m2), reflecting regeneration following large-scale disturbances. Species in cluster Bb had smaller clump sizes (〈400 m2) reflecting regeneration following local disturbances. Clusters Ca and Cb mainly included shade tolerant species and shade intolerant species, respectively. Markov models predicted that shade intolerant species, particularly those in cluster Ba, would be eliminated. Thus, species coexist by differentiation of both habitats and regeneration niche in this forest community. Some species such as Quercus serrata, however, regenerate following large-scale disturbances or human activity.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00045549
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