摘要
周丛生物在水生生态系统的初级生产、营养循环和食物网中发挥了重要作用.而周丛生物群落的结构和功能受营养、光、大型水生植物、牧食者、沉积物、水力扰动和水位、pH和碱度的影响.其中,营养、光照、牧食者强烈地影响周丛生物的数量和生产.沉积物除直接供给附泥周丛生物营养外,还通过大型水生植物间接影响附植周丛群落.水力扰动和水位可以影响周丛生物群落的空间分布、局域密度和种类结构.pH和碱度变化主要造成周丛群落优势种的变化.展望了周丛生物的应用和研究前景.
Periphyton plays a key role in primary productivity,nutrient cycling,and food web interactions in freshwater ecosystems.There are quite a few factors such as nutrient,light,macrophyte,grazer,sediment,waterpower,water level,pH and alkalinity influencing periphytic community structure and function.In general,the mass and productivity of periphyton are strongly influenced by nutrient,light and grazer.The effects of sediment on epipelic periphyton are direct as nutrient source,while the effects on epiphytic periphyton are indirect through influencing macrophytes.The periphytic spatial distribution,local density,and species structure are effected by the actions of waterpower and water level.Otherwise dominant species of periphyton community can be changed by pH and alkalinity.An outlook of future prospects of periphyton studies and applications were given.
引文
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