摘要
选择我国北方海岸带水域中属于第一、二、三、四营养级的4个经济种,构成一个简单的人工食物链,即金藻→卤虫→玉筋鱼→黑鱼君.测定了各营养级间物质(湿重、干重)、能量的转换效率,求出了食物链各环节的生产量比值.结果表明,在这个食物链运转过程中,生产1kg湿重的黑鱼君(第四营养级)需要消耗相当于初级生产力235.2kg湿重的金藻(第一营养级);生产1kg干重的黑鱼君需要消耗相当于148.3kg干重的金藻;黑鱼君富集1kJ能量需要消耗含有110.7kJ的金藻.
Four commercial species belonged to the first, second, third and fourth trophic levels in the waters of northern China seacoast were selected to form an artificial food chain, that is, Isochrysis galbana→Artemia salina→Ammodytes personatus→Sebastes fuscescens . Estimations on the conversion efficiencies of substance (fresh and dry weight) and energy among different trophic levels show that in the operation of the food chain, producing 1kg fresh S. fuscescens needed a consumption of primary productivity of 235.2kg fresh I. galbana , producing 1kg dry weight S. fuscescens needed 148.3kg dry weight I. galbana and accumulating 1kJ energy by S. fuscescens needed a consumption of 110.7 kJ energy in I. galbana .
出处
《应用生态学报》
CAS
CSCD
1998年第5期517-519,共3页
Chinese Journal of Applied Ecology
基金
国家自然科学基金
关键词
食物链
能流
金灌
黑JUN
海洋
Food chain, Energy flow, Isochrysis galbana , Sebastes fuscescens .