Stand Dynamics and Individual Growth of the Relic Picea glehnii on Mt. Hayachine

Q: What does this research mean for the field?

At its southern distribution limit on Mt. Hayachine, relic Picea glehnii can survive long-term as a canopy tree in mature stands due to low mortality and high growth rates, whereas in young regenerating stands, its long-term survival depends on future canopy acquisition despite currently high recruitment. Novelty: ClaimNovelty.INCREMENTAL. Consensus alignment: ConsensusAlignment.NEUTRAL.

Ibuki Moriwaki; Hisashi Sugita; Toshihiko Takahashi; Atsushi Sakai; Kazuhiko Masaka

doi:10.4005/jjfs.108.175

August 19, 2026日本林學會誌Open Access

Stand Dynamics and Individual Growth of the Relic Picea glehnii on Mt. Hayachine

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Key Points

To evaluate long-term population dynamics, demographic parameters, and individual growth rates of relic Picea glehnii and associated conifer species at their southern range margin.
Monitored demographic changes from 1998 to 2021 in four primary conifer species: Picea glehnii, Tsuga diversifolia, Pinus, and Thujopsis dolabrata var. hondae.
Sampled two contrasting plots: an old-growth mature stand and a young stand regenerating after a 1948 debris flow.
Assessed population size structure, recruitment into DBH ≥ 3 cm, mortality, and relative diameter growth rate (RDGR).
In the mature stand, P. glehnii maintained low stem density but exhibited low mortality and high RDGR, acting as persistent canopy trees, while T. diversifolia showed mortality concentrated in small-diameter classes.
In the regenerating stand, broadleaf trees declined and conifer dominance rose; P. glehnii established the highest number of successors but exhibited low RDGR relative to Pinus.

Implication

Longitudinal ecological study demonstrates distinct growth and recruitment patterns across conifer species on Mt. Hayachine, suggesting canopy attainment is vital for relic spruce persistence.

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Cite This Study

Moriwaki et al. (2026) studied this question.

synapsesocial.com/papers/6a895f53ca7ade938187de67 https://doi.org/10.4005/jjfs.108.175

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Stand Dynamics and Individual Growth of the Relic Picea glehnii on Mt. Hayachine

Key Points

Implication

Abstract

Discussion

Cite This Study

Stand Dynamics and Individual Growth of the Relic Picea glehnii on Mt. Hayachine

Key Points

Implication

Abstract

Discussion

Cite This Study

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