Energy flow in a marine food chain

Abstract

Abstract: 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, producing1kg fresh S.fuscescens needed a consumption of primary productivity of 235.2kg fresh I.galbana, producing1kg dry weight S.fuscescens needed 148.3kg dry weight I.galbana and accumulating1kJenergy by S.fuscescens needed a consumption of 110.7 kJenergy in I.galbana .

Key words: Food chain, Energy flow, Isochrysis galbana, Sebastes fuscescens, object-oriented, eCognition, SVM, high spatial resolution, forest gap, QuickBird

Yang Jiming, Zhou Mingjiang, Li Jun . Energy flow in a marine food chain[J]. Chinese Journal of Applied Ecology, 1998, 9(5): 517-519.

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Energy flow in a marine food chain

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