Resilience of stand structure and tree species diversity in subtropical forest degraded by clear logging

Shinjiro Fujii, Yasuhiro Kubota, Tsutomu Enoki

研究成果: ジャーナルへの寄稿記事

12 引用 (Scopus)

抄録

Subtropical forests in the Ryukyu Islands have been degraded by silvicultural practices, and thus their structural attributes are being shifted to other states dominated by a few tree species. This study clarified the mechanisms of the change, and examined the effect of clear logging on the resilience of a subtropical forest. Sprouting regeneration and typhoon disturbance were introduced into an individual-based model, SEIB-DGVM, for describing stand development and succession. The regeneration dynamics from young secondary to oldgrowth stands were reproduced fairly well with the model. Sprouting recruitment produced high stem density at the beginning of stand development, which caused a selfthinning trajectory following the -3/2 power law. In the late development stage after 70 years, tree species diversity fluctuated because of the regenerative response of sprouting species and the facilitatory effect of typhoon disturbance on the coexistence of subordinate species. The death of canopy trees because of typhoon disturbances reduced the dominance of Castanopsis sieboldii, and depressed its dominance in the understory. Consequently, the understory species could establish by virtue of fallen canopy trees, and tree species diversity increased at the stand level. Clear logging experiments in the model revealed that species diversity deteriorated, especially in the stand dominated by sprouting species. Resilience of subtropical forests was determined by initial species composition before clear logging. Our simulation results suggest that repeated logging drives subtropical forests with high species diversity to a stand monopolized by C. sieboldii.

元の言語英語
ページ(範囲)373-387
ページ数15
ジャーナルJournal of Forest Research
14
発行部数6
DOI
出版物ステータス出版済み - 12 1 2009

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stand structure
logging
species diversity
sprouting
typhoon
understory
disturbance
canopy
Castanopsis
regeneration
silvicultural practices
Ryukyu Archipelago
individual-based model
trajectories
coexistence
death
power law
trajectory
stem
stems

All Science Journal Classification (ASJC) codes

  • Forestry

これを引用

Resilience of stand structure and tree species diversity in subtropical forest degraded by clear logging. / Fujii, Shinjiro; Kubota, Yasuhiro; Enoki, Tsutomu.

:: Journal of Forest Research, 巻 14, 番号 6, 01.12.2009, p. 373-387.

研究成果: ジャーナルへの寄稿記事

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