天鹅湖大叶藻种苗补充情况调查

Supplementary investigation of eelgrass seedlings(Zostera marina L.) in Swan lake

本研究以山东荣成典型潟湖——天鹅湖内的大叶藻(Zostera marina L.)海草床为研究对象,从2015年3月到6月对大叶藻种子萌发形成的幼苗进行进了月度调查,包括春季大叶藻种苗的密度、株高、叶鞘高、叶数、叶宽以及分枝情况。结果表明,天鹅湖大叶藻种子在3月即开始萌发,但萌发量较少,种苗密度较低;4月种子大量萌发,种苗密度不断升高,并达到峰值,为(481.77?303.42)株/m2;5月份种子萌发结束,种苗密度下降,同时开始克隆生长;6月份种苗不断生长,分枝数增多,种苗开始出现有性生殖枝。至此,春季种苗的萌发过程结束,进入有性生殖过程。

In this study, we examined seedlings of the eelgrass Zostera marina L. in a typical lagoon（Swan Lake, Rongcheng, Shandong Province）. We conducted an in situ investigation from March to June 2015. During this period, we measured the eelgrass seedling density, seedling height, leaf sheath height, leaf number, leaf width, and branch number. The results show that while the seeds began to germinate in March, the germination rate was very low, as was the seedling density. In April, many seeds began to germinate, and the seedling density increased rapidly and reached a peak（481.77 ± 303.42 shoots·m^-2）. The seed germination ended in May, and the seedling density decreased gradually. The seedlings began to branch new shoots in May, and these seedling shoots continued to grow and produced sexual shoots in June. At this time, seedling germination had ended, and the seedlings entered the sexual reproduction stage.