摘要
海草床是滨海湿地中重要的生态系统,近年来世界范围内出现大面积的海草床衰退,水体富营养化引发附生藻类的大量繁殖是其中的一个主要原因。本文综述了近20年来关于海草与其附生藻类之间相互作用的研究进展,包括海草床中附生藻类的地位及其积极作用,附生藻类与海草的物质交换关系,附生藻类对海草的影响(主要是光利用限制和营养物质利用限制)。对海草床中海草-附生藻类群落复杂的生态关系提出了研究展望,包括海草与其附生藻类的物质交换机制,海草与其附生藻类对营养物质利用的竞争关系,附生藻类生物量分别对海草可利用光和光合作用能力的削弱关系,海草与附生藻类对海草床初级生产力的贡献随环境因子的变化关系,通过原位观测数据的积累建立海草生长与生物作用的模型等。
Seagrass bed is an important ecosystem in coastal wetland. The massive reproduction of epiphytic algae caused by eutrophication was supposed to be one of the main reasons inducing the worldwide large scale decline of seagrass beds in recent years. This paper reviewed the research advance in past two decades on the interactions between seagrass and its epiphytic algae, including the roles and functions of epiphytic algae in seagrass bed, the seagrass-epiphyte relationship in nutrient exchange, and the effects of over-densely covered epiphytes on seagrass leaves （mainly the decrease of light and nutrient availability）. Some important aspects of further study on the seagrass-epiphyte relationship were suggested： 1 ） mechanisms in material exchange between seagrass and epiphytic algae, 2 ） competition in nutrient uptake between seagrass and epiphytic algae, 3 ） impact of epiphyte biomass on the decrease of light availability and photosynthesis capacity of seagrass, 4） contributions of seagrass and its epiphytic algae on the primary productivity of seagrass bed in relations to environmental factors, and 5 ） modeling of seagrass growth regulated by biological factors based on in-situ observation data.
出处
《生态学杂志》
CAS
CSCD
北大核心
2008年第10期1785-1790,共6页
Chinese Journal of Ecology
基金
国家自然科学基金项目(40776086)
中国科学院南海海洋研究所知识创新工程领域前沿项目(LYQY200706)
联合国环境规划署/全球环境基金(UNEP/GEF)资助项目(UNEP/GEF/SCS/Chi/MoU2c)
关键词
海草
附生藻类
竞争
光
营养盐
seaweed
epiphytic algae
competition
light
nutrient salt
