胶州湾浮游植物研究Ⅱ环境因子对浮游植物群落结构变化的影响

该文依据 1995年 3月～ 1996年 1月间浮游植物的调查资料 ,并结合同期水温和营养盐的资料变化 ,分析不同环境因素对浮游植物群落结构的影响。结果表明 :水温的变化对浮游植物的种类组成和数量变化都有一定影响 ,秋季和冬季优势种交替明显 ;营养盐对浮游植物群落结构的变化影响明显。根据胶州湾营养盐结构的改变状况 ,并结合历史资料对比发现 ,胶州湾网采浮游植物的物种数和细胞数量呈下降趋势 ,优势种类趋单一化 ;但初级生产力并未下降 ,可能与微型浮游植物所占份额增大相关。

Study on the Phytoplankton in Jiaozhou Bay Ⅱ: Influence of the Environmental Factors to Phytoplankton Community

Based on the survey data of phytoplankton, water temperature and nutrients from 1995.3 to 1996.1 in Jiaozhou Bay, the influence of environment factors to phytoplankton community was discussed. The results showd that the variation of water temperature influenced the composition and abundance of the phytoplankton. The dominant species alternated obviously in winter and summer. Based on the changes of nutrient structure and compared with the historical data of Jiaozhou Bay, it was observed that the species of phytoplankton declined and the composition of the dominant species became simple. The abundance of the net phytoplankton also had adeclined tendency, but the primary production had not declined. This might due to the higher proportion of pico and nano phyto plankton community.