都市近郊緑地としての里山林の現状と都市化に伴う里山地域の変遷予測(1) : 海上の森におけるアカマツ優占林分の構造と2年間の動態

概要

論文の詳細を見る
The effects of changes in a suburban secondary forest representing large-scale green spaces on urban environments must be elucidated. In order to develop a broader understanding of forest dynamics, we need to explain patterns of forest regeneration, factors affecting forest structure and composition, and the mechanisms of species diversity and coexistence. This requires large-scale forest Long Term Ecological Research using permanent plots. Therefore, we investigated the stand structure and the dynamics of secondary forest dominated by Pinus densiflora in Kaisyo Forest, near Nagoya City. We established a 1-ha permanent plot in 2003, and investigated for all stems ⩾>5 cm in diameter at breast height (dbh) in the plot. In 2005, all living stems were re-censused. There were 30 species in the plot, with stem density of 2329 stems per ha. Pinus densiflora, Quercus serrata and Ilex pedunculosa co-dominated in the stand. The mortality rate of stems was significantly higher than the recruitment rate during the 2 years period. The mortality rate of stems was size-dependent, increasing with size class. However, stems with larger size increased for 2 years. The results indicate that the higher mortality of the canopy stems was caused by overcrowding of canopies per se.
名古屋産業大学の論文
2006-03-31