海洋科学Issue(6)：24-31,8.
绿藻浒苔对浮游植物群落结构影响研究
Influence of Enteromorpha prolifera (Chlorophyta) on the phytoplankton community structure
摘要
Abstract
The rapid proliferation of Enteromorpha prolifera (Chlorophyta) formed the “green tides” which influ-enced the onshore area of Qingdao city in recent years. In order to evaluate the influence of this macroalgae on the community structure of natural phytoplankton, fresh tissue of E. prolifera and phytoplankton seawater were sam-pled near the third bathing beach of Qingdao at the end of July 2011. The cocultivation experiment of E. prolifera and phytoplankton was lasting ten days under controlled conditions in the laboratory. Four treatments were designed including one control group and three experimental groups, with three paralleled samples in each treatment. No E. prolifera was added to the control group whilst 0.8 (low), 2.4 (medium) and 7.2 g wet/L (high) fresh tissue were added to the experimental groups. The results showed that diatoms were inhibited during the cultivation period, with significant low cell abundance in the three experiment groups (P<0.05), averaging 84.1%, 92.1% and 95.3%reduction compared with the control group respectively. The cell abundance of predominant species Nitzschia long-issima in the high experimental group was only 0.38%of that in the control group in the tenth day. The cell abun-dance of dinoflagellates increased from the beginning of the cultivation and fell back during the late period in all treatments. The cell abundance of predominant species Prorocentrum lima in the high experimental group was 98.7 times higher than that in the control group in the third day. The existence of E. prolifera altered the community structure of natural phytoplankton through the influence on the cell abundance and predominant species succession. The composition of predominant species would become simplified whilst the species diversity and the robust sta-bility of phytoplankton community would lose. However, due to the allelopathic effect of E. prolifera on the single cell phytoplankton species, the blooms of those red-tides species in natural seawaters would be inhibited, favoring for the prevention of red tide in coastal regions of China Seas and the ecological restoration of aquatic environments.关键词
浒苔(Enteromorpha prolifera)/浮游植物/群落结构/物种多样性Key words
Enteromorpha prolifera/phytoplankton/community structure/species diversity分类
生物科学引用本文复制引用
张雪,栾青杉,孙坚强,王俊..绿藻浒苔对浮游植物群落结构影响研究[J].海洋科学,2013,(6):24-31,8.基金项目
国家自然科学基金项目(40976102) （40976102）
中央级公益性科研院所基本科研业务费专项资金项目(20603022011001) （20603022011001）
