摘要
底栖穴居动物是河口潮滩生态系统的重要组成部分,它在潮滩湿地生态系统内营养盐的循环过程中起着非常重要的作用。以长江河口崇明东滩湿地为研究对象,在实验室内,运用对比实验模拟的方法,定量地研究了底栖穴居型甲壳纲蟹类动物对潮滩生态系统中营养盐早期成岩作用的影响。结果发现,蟹类动物的掘穴作用加剧了潮滩沉积物中形态氮和形态磷的迁移、转化,促进了沉积物中的有机氮向NH4+-N转化、NH4+-N向NO3--N的转化;有机磷向铁结合态磷、自生磷灰石和钙结合态磷的转化。
The caving macrobenthos are an important com-ponent in the estuarine tidal flat ecosystem, whichplay a key role in cycling of nutrient in the ecosystem.With comparative and simulated experiment, it hasbeen quantitatively studied of the effect of crabs onthe early diagenesis of nutrients in the sediments fromthe eastern tidal flat of Chongming island in YangtzeEstuary. The findings showed that the burrowing ofcrabs has an important affect on transformation ofnitrogen and phosphorus in tidal flat sediments, andthat it stimulated transformation of organic nitrogenin sediments into ammonium, and ammonium into ni-trate. In addition, the burrowing of crabs also accel-erated conversion of organic phosphorus into ironbounded phosphorus, autogenesis phosphorus and cal-cium bounded phosphorus.
出处
《上海环境科学》
CAS
CSSCI
CSCD
北大核心
2003年第3期180-184,196,共6页
Shanghai Environmental Sciences
基金
国家自然科学基金资助项目
编号40131020
49801018
上海市重点学科建设资助项目。
关键词
底栖穴居动物
潮滩沉积物
营养盐
早期成岩作用
沉积剖面
长江口
Caving macrobenthosTidal flat sedimentNutrientEarly diagenesisSediment depth profileYangtze estuary
