鼠尾藻生长和生殖季节的研究

The Seasonal Growth and Reproduction of Sargassum thunbergii (Pheaophyta)in Pingtan Island, Fujian Province

本文对生长在平潭岛的鼠尾藻进行了生长和生殖季节的研究,选择两个浪冲击度不同的断面,于1989年3月至1990年3月的每月大潮期间,用0.25×0.25厘米的方框随机取样。研究结果表明,生长在平潭岛的鼠尾藻,侧枝生长期为3～7月,生殖季节为4～7月,7月藻体初生枝达最长,生物量最大。8月藻体初生枝腐烂,侧枝脱落,生物量全年最小,比较两个断面的结果表明,藻体初生枝长度和生物量与浪冲击度有关,浪冲击度越大,藻体初生枝越长,生物量也越大。

The monthly changes in standing crop, reproduction and the growth of primary branches and lateral branches of Sargassum thunbergii (Mertens) O. Kuntze in Pingtan Island, Fujian Province, were studied during March 1989 to March 1990. Two study sites were chosen based on the strengh of wave scouring and monthly collections at times of daytime low tide were made randomly by using a quadrat of 0.25×25cm. The results from this study show that the thalla bearing receptacles were found April to July and the growth of lateral branches occurred during March to July. The thallus reached its maximum length and weight in July, and its primary laterals decayed away in August. It is also shown that thullus length and standing crop increassed with the strength of wave scouring.