Conifer establishment and root architectural responses to forest floor heterogeneity in an old-growth subalpine forest in central Japan

Doi, Yusuke; Mori, Akira; Takeda, Hiroshi

doi:10.1016/j.foreco.2007.11.001

Cited by 20 publications

(14 citation statements)

References 48 publications

(82 reference statements)

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“…2A) than in the natural stand. This increase in lateral branching and intensive exploitation of soil near the surface were related to selfdefense or acclimatization processes, thus limiting the risks associated with drought and increasing stem stability (Yura, 1993;De Silva et al, 1999;Khuder et al, 2007;Doi et al, 2008;Kalliokoski et al, 2008). However, in view of (1) the absence of taproot (also noted by Sheedy, 1997); (2) the distribution of roots unidirectional and near the surface; (3) the lack of much in-depth rooting; (4) the spiraling of main roots and (5) the numerous temporal delays to growth criteria, trees in the plantation would present a higher risk of overthrow than those at the natural site, despite a larger number of ramifications (Table 2 and Fig.…”

Section: Spatial Distribution Of Root Systemsmentioning

confidence: 99%

Spatial distribution, architecture, and development of the root system of Pinus banksiana Lamb. in natural and planted stands

Plourde

Krause

Lord

2009

Forest Ecology and Management

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Section: Spatial Distribution Of Root Systemsmentioning

confidence: 99%

Spatial distribution, architecture, and development of the root system of Pinus banksiana Lamb. in natural and planted stands

Plourde

Krause

Lord

2009

Forest Ecology and Management

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“…For successful germination, seeds must extend their roots into the humus layer on fallen logs, which consists of inner bark and decomposed moss and logs (Nakamura 1992), and suck up water. However, fallen logs are a harder substrate than soil, and vertical root extension of seedlings is inhibited on logs Doi et al 2008). It was suggested that the radicle extension of germinated seeds was difficult on recently fallen (i.e., hard) logs .…”

Section: Introductionmentioning

confidence: 99%

Evaluation of suitable conditions for natural regeneration of Picea jezoensis on fallen logs

Iijima

Shibuya

2010

Journal of Forest Research

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The abundance of Picea jezoensis, a major conifer tree species in Hokkaido, northern Japan, is currently decreasing due to the lack of suitable conditions for recruitment and intensive harvests. To contribute to the development of sustainable forest management in Hokkaido, suitable substrates for natural regeneration of P. jezoensis were evaluated during a 4-year experimental study using seed additions in a natural coniferous forest. The environmental conditions (moss height, log hardness, extent of the humus layer, and light conditions) of fallen logs were measured. Moss height was categorized into three groups: 0 mm, Bark; 0 - 20 mm, Mthin; and ≥ 20 mm, Mthick. The germination rates of P. jezoensis were highest on Mthin, intermediate on Bark, and lowest on Mthick. Survival rates were low on Mthick, did not differ between Bark and Mthin, and increased with enhanced light. Growth increased with light, but the root allocation of seedlings was not affected by any environmental conditions. From these results, we determined that fallen logs with no or thin moss cover under bright conditions were most suitable for P. jezoensis regeneration. We discussed the generality of our results in relation to a co-occurring tree species in Hokkaido and the results of other regions

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“…Factors to enable P. jezoensis to share canopy dominance with more shade tolerant Abies include species ecological characteristics and environmental factors. Supply of large woody debris in old-growth forest provides substrate for P. jezoensis regeneration (Nakagawa et al 2003;Doi et al 2008). The persistent sapling bank of P. jezoensis is a key supporter of the maintenance of spruce forests in the absence of catastrophic disturbance (Wu 1990).…”

Section: Introductionmentioning

confidence: 99%

Stand Structure and Maintenance of Picea jezoensis in a Northern Temperate Forest, South Korea

Jang

Park

2010

J. Plant Biol.

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Stand structure and spatial distribution of Picea jezoensis (Siebold et Zucc.) Carrière on Mt. Gyebang, Korea was investigated to provide information on the structural characteristics and the maintenance of P. jezoensis population in northern temperate mixed coniferous forests. Height and diameter at breast height (DBH) distribution, age, growth, and spatial distribution patterns of P. jezoensis were examined in thirty nine 100-400 m 2 quadrats or circular plots. The overall stand structure attributes in the study sites are stem density of 709 trees ha −1 , a mean DBH of 12.8 cm, and a mean height of 5.6 m, with reverse J shapes of DBH and height distributions. The stem density of P. jezoensis population was 81 trees ha −1 , a mean DBH of 20.7 cm, and a mean height of 9.1 m, showing bimodal-like shapes in age and DBH distributions. Several growth release periods implied that P. jezoensis stands experienced small disturbances. The radius of patches of similar-sized P. jezoensis in the variogram was equivalent with the height of the tallest trees, indicating that patches were established following the fall of trees in the upper canopy layer. Small windthrows in this region contributed to the maintenance of the P. jezoensis stand by releasing sapling growth and providing nursing logs and space for seedlings.

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Conifer establishment and root architectural responses to forest floor heterogeneity in an old-growth subalpine forest in central Japan

Cited by 20 publications

References 48 publications

Spatial distribution, architecture, and development of the root system of Pinus banksiana Lamb. in natural and planted stands

Spatial distribution, architecture, and development of the root system of Pinus banksiana Lamb. in natural and planted stands

Evaluation of suitable conditions for natural regeneration of Picea jezoensis on fallen logs

Stand Structure and Maintenance of Picea jezoensis in a Northern Temperate Forest, South Korea

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