japonica était la plus forte sur les souches où croissaient 75% des gaules alors que les souches n’occupaient que 3% de la surface de la forêt. Parmi trois types de microsite (sol, souches et billes au sol), la densité des gaules de C. Nous avons étudié les propriétés des souches qui favorisaient la régénération naturelle d’espèces de conifères dans une vieille forêt dominée par Cryptomeria japonica (L.f.) D. Résuméĭans une forêt naturelle ayant déjà été exploitée où il y a peu de billes au sol, les souches devraient constituer un substrat adéquat pour la régénération. Most of the fallen logs were less than 60 cm in height and it appeared unlikely that they would function as regeneration sites for C. japonica at this research site, where saplings were under competition with dense undergrowth vegetation. We concluded that the height of the microsite was an important factor for regeneration of C. Saplings on stumps were concentrated in higher positions on the stump, and survivorship tended to be greater when their root location was higher.
Taller stumps exhibited a significantly higher density of saplings indeed, there were no saplings on stumps less than 60 cm in height. The density of saplings was significantly greater on stumps produced by logging than on naturally broken stumps. Of these properties, the type of stump was the most influential. Six properties of stumps were quantified: height, diameter at ground level, decay class, species taxon, type (i.e., cause of occurrence: logging or natural disturbance), and light conditions. The mortality of saplings during the 3-year study period did not differ significantly among the three microsites. japonica saplings growing in three microsites (ground, stumps, and fallen logs) revealed that sapling density was highest on the stumps 75% of saplings were distributed on stumps, which occupied only 3% of the projected forest area. We investigated the properties of stumps that promoted the natural regeneration of coniferous species in a natural old-growth forest dominated by Cryptomeria japonica (L.f.) D. “I often remind him that the point of building models is to have fun, not win prizes,” Chiu’s father said, adding that his son graduated from the experimental Forest School, where his creativity was encouraged, and that as a parent he supports his children’s pursuit of creative enjoyment.In a natural forest that has experienced logging and lacks large fallen logs, cut stumps are expected to become a suitable substrate for regeneration. Lin Tzu-chiao (林子喬), a teacher who helped Chiu assemble his model, said that modeling is a complicated hobby, adding that Chiu put a lot of thought into selecting the appropriate colors to bring his concept to life.Ĭhiu spent six months planning the composition of Over War and practicing his skills, and began building the model two months before the competition, Lin said, adding that Chiu showed passion and determination. He said that because he does not get good grades in school, he was grateful for his parents’ support of his hobby, which is a source of pride and achievement for him. I did not think I would win first prize.” “Last year I had the opportunity to compete and thought it would be fun to go to Japan. I participated the previous year, but was not selected,” Chiu said. He made his prize-winning work, named Over War, by combining a commercial kit with materials that he scavenged, Chiu said, adding that he sprayed the model with a specially selected paint and adorned it with rotten wood, chosen to create an aged battlefield debris look.
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