Structure and regeneration of <i>Fraxinus spaethiana‐Pterocarya rhoifolia</i> forests in unstable valleys in the Chichibu Mountains, central Japan

Ann, Seoung Won; Oshima, Yoshitake

doi:10.1007/bf02347793

Cited by 14 publications

(5 citation statements)

References 29 publications

(7 reference statements)

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“…The distribution of adults of this species along the channel can thus be explained -to a certain extent -by the seed-to-seedling process (Fig. 6;Sato 1992;Ann and Oshima 1996;Suzuki et al 2002).…”

Section: Vertical Lines Show Standard Errorsmentioning

confidence: 99%

“…From a longer-term perspective, species coexistence may be enabled by temporal variations in the physical environment caused by infrequent disturbances, such as landslides on adjacent slopes, larger-scale debris flows, and others (e.g. Ann and Oshima 1996;Liang and Seagle 2002). Such catastrophic events may critically improve the seed-to-seedling process of some species and provide opportunities to regenerate.…”

Section: Does Environmental Heterogeneity Promote Coexistence?mentioning

confidence: 99%

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Effects of microenvironmental heterogeneity on the seed‐to‐seedling process and tree coexistence in a riparian forest

Masaki

Osumi

Takahashi

et al. 2006

Ecological Research

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In a temperate riparian forest, the effects of substrate types, canopy gaps and conspecific seedfall density were investigated on the seed-to-seedling process for the five dominant species (Aesculus turbinata, Fagus crenata, Acer mono, Pterocarya rhoifolia and Cercidiphyllum japonicum). Densities of seedfall and subsequent seedling recruits were measured in the stand over a period of 6 years. A model assuming that local density of seedling recruits is proportional to seedfall density in the preceding year significantly explained a spatial variation in seedling recruits for all species. Several environmental factors were then added. Substrate composition had a positive effect on P. rhoifolia and C. japonicum. P. rhoifolia was favored by gravel substrate, which also explained the adult distribution of this species in this forest. C. japonicum appeared to be facilitated by a mineral-soil substrate. However, the distributions of this substrate and adults of C. japonicum did not follow each other closely. A. mono was negatively affected by gaps, and F. crenata was negatively affected by conspecific seedfall density. In contrast, A. turbinata was not significantly affected by any of the environmental factors tested. The microenvironmental heterogeneity in this forest explained species coexistence to a limited extent in the context of seed-to-seedling processes. Performances at later stages of the life-cycle and/or catastrophic disturbances (e.g. landslides) might have a stronger influence on species coexistence in this forest.

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Section: Vertical Lines Show Standard Errorsmentioning

confidence: 99%

Section: Does Environmental Heterogeneity Promote Coexistence?mentioning

confidence: 99%

Effects of microenvironmental heterogeneity on the seed‐to‐seedling process and tree coexistence in a riparian forest

Masaki

Osumi

Takahashi

et al. 2006

Ecological Research

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“…Densities of seedlings and saplings in each of six forest types. 1982199619681982Tu 19681996Sh 19481973Pr 194819481968Fc 19481 S 4 Ss 1975Tu 197519601975 1948 1996 The formation and disappearance of the riparian forest areas in the study area during 19481996. Year Area (ha) 19481968196819731973198219821996 Sh Tu 1990Gregory et al, 1991;Naka mura, 2005 Sakio, 2005;Suzuki et al, 2002;Shin and Nakamura, 2005;Nakamura et al, 19971999…”

Section: Imentioning

confidence: 97%

“…Salix hukaoana IB 2000 6 Kimura, 1974Kimura, 2005Kimura, 2006Kimura, 1986Kimura, 1995Kimura, 2004Kimura, 2004Kimura, 2006Kimura, 1999Suzuki et al, 2002;Nakamura, 2005 Adams andAnderson, 1980;1988;Niiyama, 1990Bell, 1980Hupp and Osterkamp, 1985;1996;Nakamura et al, 1997 Bell andMoral, 1977;Bell, 1980;Hughes, 1990;Rober tson and Augspurger, 1999;Shin and Nakamura, 2005; II. Outlines of the 25 study plots and relative abundance based on the total basal area at breast height.…”

Section: Imentioning

confidence: 99%

Mosaic Structure of Riparian Forest Vegetation in the Valley Bottom of the Yubiso River, Japan, with Reference to Stand Formation of Threatened Species, Salix hukaoana.

Sashimura¹,

Suzuki²,

Ide³

2008

J. Jpn. For. Soc.

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This study examined the environmental conditions that were required to maintain a threatened species, Salix hukaoana. Twenty-five plots were set up in the riparian zone along the Yubiso River, and forest structure, topography, and forest age were investigated. The riparian forest in the area was classified into the following five forest types by dominant species: Salix sachalinensis, Toisusu urbaniana, Salix hukaoana, Pterocarya rhoifolia, or Fagus crenata. The Salix sachalinensis type was found only in the lower floodplain. The Salix hukaoana type and Toisusu urbaniana type were found in both the lower and the higher floodplain. The Pterocarya rhoifolia type was found in the lower floodplain and on hillslopes in the higher floodplain. The Fagus crenata type was found on both terraces and hillslopes. All the stands of Salicaceae forest types were less than 45 years old. Among the five forest types, the stand age of Salix sachalinensis type was lower than the other types by 27 years, while those of Pterocarya rhoifolia and Fagus crenata types aged more than 88 years. The Salix hukaoana type was likely to become established on open areas in the floodplain after a fluvial disturbance and was maintained until its replacement by the Pterocarya rhoifolia type. In the Yubiso River valley, a mosaic structure consisting of various types of forest might be formed due to the diverse disturbance regime and environmental conditions that are peculiar to the wide valley floor. Therefore, it is crucial to maintain this variation in disturbance regime and site conditions for conserving the S. hukaoana population together with the riparian vegetation and along the Yubiso River.

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“…Once established, these species can persist via their long life spans, namely, 100-150 years for P. rhoifolia (Ann and Oshima 1996;Sato 1988;Kaneko 2009), over 200 years for C. japonicum (Kubo et al 2005), over 250 years for F. platypoda (Sakio 1997) and over 400 years for A. -33 turbinata (Hoshizaki 2009).…”

Section: Species Composition and Distributionmentioning

confidence: 99%

Micro-landform Structure and Tree Distribution in Subalpine Riparian Area of V-shaped Valley, Minami Alps, Central Japan

Hirofumi

Sakai

2015

Geog. Rev. Japan B

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Riparian areas are unique habitats that contribute to biodiversity, so they have been focused on in many regions; however, subalpine riparian forests have hardly been examined in Japan. We investigated the micro-landform structure and spatial pattern of tree distributions in a V-shaped valley at 2,000-2,200 m a.s.l. in the Minami Alps, central Japan, using a 0.42 ha core-plot and 16 belt-transects set in a headwater area of Norogawa River. As riparian topographical components, channel, floodplain, scarp of terrace and terrace were detected, which were arranged roughly from lower to higher elevations from streams, as well as mountain slope as a micro-landform unit outside the riparian area. Single-layered floodplain, conspicuous terrace segments and the probable lack of a lower sideslope were identified as features that differ from those found in previous studies on other climatic/largescale geomorphological conditions. The distribution of deciduous species was biased to lower elevations, with the representatives Salix cardiophylla var. urbaniana on floodplains and Alnus matsumurae on scarps of terraces. These micro-landform units were recognized as a riparian zone in terms of vegetation. Meanwhile, climatic climax evergreen conifers, mainly Abies veitchii, Tsuga diversifolia and A. mariesii, dominated not only mountain slopes but also terraces, indicating that terraces are upland areas in terms of their vegetation. A much smaller area, low species diversity and an assumed direct succession from pioneer to climax phase, because of poor long-lived riparian species capable of forming a mid-or late successional phase, were properties differing from those found in previous studies on other climatic/geomorphological conditions.

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Structure and regeneration of Fraxinus spaethiana‐Pterocarya rhoifolia forests in unstable valleys in the Chichibu Mountains, central Japan

Cited by 14 publications

References 29 publications

Effects of microenvironmental heterogeneity on the seed‐to‐seedling process and tree coexistence in a riparian forest

Effects of microenvironmental heterogeneity on the seed‐to‐seedling process and tree coexistence in a riparian forest

Mosaic Structure of Riparian Forest Vegetation in the Valley Bottom of the Yubiso River, Japan, with Reference to Stand Formation of Threatened Species, Salix hukaoana.

Micro-landform Structure and Tree Distribution in Subalpine Riparian Area of V-shaped Valley, Minami Alps, Central Japan

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