【摘要】 利用建在武汉东湖的中型围隔来研究沉水植被的重建与消失对原生动物群落的影响。结果表明 :沉水植被重建后 ,一些原已消失的种类重又出现 ,原生动物种类增加 ,密度降低 ,多样性指数增高 ,优势种类由固着种类取代浮游种类。沉水植被的消失引起原生动物优势种类的明显变化 ,周丛种类大量丧失 ,但密度显著增高更多还原

【Abstract】 In order to clarify the effects of restoration and disappearance of submerged macrophytes upon structure and biodiversity of protozoan community,the mesocosm experiments were conducted in Lake Donghu,Wuhan.When the submerged macrophytes were restored in the enclosures,some species of protozoans which were recorded in the 60’s but disappeared from the lake waters afterwards were to be reappeared.There were richer species,lower densities and higher biodiversity indeces in the two macrophytic enclosures.The sessile species dominated the protozoan community in the enclosures,while the planktonic species dominated in the lake waters.The removal of the restored macrophytes from enclosure.B resulted in drastic changes of the protozoan community,i.e.,some periphytic species disappeared,but the total densities increased.更多还原