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OALib Journal期刊
ISSN: 2333-9721
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珠江口水域浮游生态系统中磷的循环及其效应评估
Keywords: 珠江口水域,浮游生态系统,磷循环,效应
Abstract:
？根据现场调查和室内试验工作,计算珠江口水域浮游植物有效光合作用水体体积,同时研究浮游动物摄食行为对磷再生的补偿作用,进而对该水域磷的生物利用状况进行初步评估。分析珠江口2002—2003年的数据发现,珠江口水域浮游植物有效进行光合作用水体的体积存在季节性变化,枯水期约为9.7×104m3,而丰水期约为6.6×104m3。该水域总初级生产量在枯水期约为36kg.d-1,在丰水期约为31kg.d-1,呈现枯水期大于丰水期的特点。浮游动物的摄食作用可促进水体中磷的再生,这部分磷可满足浮游植物生长对磷需求的1.5%—15.6%,并呈现丰水期大于枯水期的特点。浮游动物摄食作用直接释放的量远大于其自身生理周转释放的量。
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