- 期刊
福山次生樟櫧林的果實雨
The Fruit Rain of the Secondary Lauro-Fagaceae Hardwood Forest at Fu-Shan
摘要
從1992年6月至1993年7月間，我們在福山次生樟櫧林內l公頃林地中，設置80個枯落物收集網，每個月收集網內之果實，並計數出現的種類、重量及數量。一年來，總共收集到20種樹種的果實，這些果實（飛散）雨的果實數量以黃杞最多，其次是白桕、白匏仔、山紅柿與薯豆。各樹種果實雨出現的高峰期大致可以分為三類：(1)5至6月出現者為楠木類，(2)7至9月出現者為九芎、白匏仔、山紅柿、薯豆、烏皮茶，(3)其餘在10至12月出現者。但是本林分主要突出樹種白校欑的果實卻很少出現，可能與囓齒動物取食有關。各樹種果實雨的高峰期亦為果實平均重量最高的時期。此一林分果實雨的特性對於次生樟櫧天然林更新的潛在影響，在本文中加以討論。
並列摘要
From June 1992 to July 1993, 80 litter traps were installed in 1 ha area of the Fu-Shan secondary Lauro-Fagaceae hardwood forest. Within this period, fruits in the litter traps collected were counted and weighed monthly. The fruits of 20 tree species were collected. The largest amount of fruits in the fruit rain belongs to Engelhardtia roxburghiana, next was Sapium discolor, Mallotus paniculatus, Diospyros morrisiana, and Elaeocarpus japonica. The amount of the fruit rain reached its peak varied with each species in this forest and that can be categorized into three periods: (1) May to June, for Machilus species, (2) July to September, for Lagerstroemia subcoctata, Mallotus paniculatus, Diospyros morriisana, Elaeocarpus japonica, Tutcheria shinkoensis, (3) October to December, for other species. Although Castanopsis carlesii var. sessilis is the dominant emergent tree in this forest, its fruit is rare in the fruit rain, which may be related to rodent consumption. The average fruit weight reached its peak at the time with the amount of fruit rain. The implication of characteristics of the fruit rain for natural regeneration of the secondary Lauro-Fagaceae hardwood forest is also discussed.