弧形串珠藻生长物候期研究

1992年10月至1993年9月间,对分布于山西太原晋祠泉的弧形胶串珠藻Batrachos permum arcuatum生长的物候期进行了研究.定期测定水温、pH值、流速、藻体出现频度、平均盖度和藻体的一些形态特征.结果表明:(1)晋祠泉水体温度、pH和流速季节变化幅度不大;(2)藻体的出现频度和盖度有明显的季节性变化,从秋季到次年的春季逐渐增加,生长最旺盛的时期在5月份;(3)藻体的生长发育有明显的季节性变化规律,从晚秋到早夏生长良好,在春末夏初生长达到高峰,而且藻体各部分的生长和发育基本上同步.

Seasonal Dynamics of Batrachospermum arcuatum Growth and Distribution in Jinci Spring, China

The seasonal dynamics of the growth and distribution of freshwater rhodophyte Batrachosper-mum arcuatum in Jinci of Taiyuan City, Shanxi Province, North China,was researched,from October 1992 to September 19 9 3. The water temperature, pH, current velocity, occurrence frequency, mean of cover, plant height, whorl diameter, fascicle length, carpogonial branch length, carpogonium length, carposporophyte number per whorl,carposporophyte diameter,carposporangium length and carposporangium diameter were examined regularly. The results showed that water temperature was maximum in July to August and mini-mum in January,water pH had little change,and the variation of current velocity was irregular. The occur-rence frequency and mean cover of the alga increased from autumn to spring and the highest growth stage was in May. The seasonal growth dynamics of this alga were evident. It developed well from late autumn to early summer,and peaked in May. The growth and development was synchronal in all parts of the plant.