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Title: Emergence-disappearance processes and mortality factors of current-year seedlings of Abies firma in a natural Abies-Tsuga forest, Wakayama
Other Titles: モミ・ツガ天然林におけるモミ当年生実生の消長過程と死亡要因
Authors: Angeles-Perez, Gregorio
Sakimoto, Michinori  kyouindb  KAKEN_id
Author's alias: Angeles-Perez, Gregorio
嵜元, 道徳
Keywords: Abies-Tsuga forest
A bies firma
mortality factors
Issue Date: 28-Dec-1999
Publisher: 京都大学大学院農学研究科附属演習林
Journal title: 森林研究 = Forest research, Kyoto
Volume: 71
Start page: 27
End page: 33
Abstract: To clarify the demographical traits of current-year seedlings of Abies firma, we examined the emergence and survival processes of seedlings and mortality factors in a total of 213 seedling plots of 1 m[2] inside of a 0.96 ha plot in a natural Abies-Tsuga forest, Wakayama. Seedling emergence started in the middle of April, reached a peak in late April and declined thereafter. The causes of mortality changed seasonally ; herbivory and damping-off prevailed from April to early July, while drought prevailed during summer. Emerged seedlings decreased with time and mortality rate reached 60 % of emerged seedlings at the beginning of December. From the multiple regression analysis, the distance from the nearest conspecific adult negatively affected seedling emergence, while the depth of litter (L) layer affected it positively. Vegetation cover of the ground-layer and the depth of litter (L) promoted the seedling survival rate. Slope angle had a slightly negative effect on seedling survival, although not significant.
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