Stable isotopes in aquatic food web of an artificial lagoon in the Hangzhou Bay,China  

作　　者：全为民 施利燕 陈亚瞿 

机构地区：[1]Key and Open Laboratory of Marine and Estuarine Fishery Resources and Ecology, Ministry of Agriculture, East China Sea Fishery Research Institute, Chinese Academy of Fishery Science

出　　处：《Chinese Journal of Oceanology and Limnology》2010年第3期489-497,共9页中国海洋湖沼学报（英文版）

基　　金：Supported by the Special Research Fund for the National Non-profit Institutes (East China Sea Fishery Research Institute) (No. 2007M03);Shanghai Jingshan City Beach Management Co. Ltd, and the National Basic Research Program of China (973 Program) (No.2010CB429005)

摘　　要：Stable isotope values, δ13C and δ15N, were determined for four primary producers and 19 dominant consumers in a small artificial lagoon located in Hangzhou Bay. Based on these results the major pathways for energy flow and trophic structure of the artificial lagoon ecosystem were characterized. The mean δ13C values for the 19 consumers ranged from -22.99‰ to -14.24‰. Apart from so-iny mullet Liza haematocheila, the other 18 consumers had intermediate δ13C values between those of epibenthic microalgae and particulate organic matter (POM). The results of a multiple source linear mixing model (IsoSource model) indicated that 50% or more of the organic carbon in the tissues of most consumers was derived from epibenthic microalgae. This indicated that these primary producers were the main food source fueling the lagoon food web. The mean δ15N values for the 19 consumers varied between 4.93‰ and 12.97‰ and indicated four trophic levels in the lagoon. Four macroinvertebrates and zooplankton represented the primary consumers, whilst the other 14 consumers occupied the secondary and tertiary consumer levels. The 19 consumers were divided into three trophic guilds (detritivores/suspension feeders, omnivores and carnivores).Stable isotope values, δ^13C and δ^15N, were determined for four primary producers and 19 dominant consumers in a small artificial lagoon located in Hangzhou Bay. Based on these results the major pathways for energy flow and trophic structure of the artificial lagoon ecosystem were characterized. The mean δ^13C values for the 19 consumers ranged from -22.99‰ to -14.24‰. Apart from so-iny mullet Liza haematocheila, the other 18 consumers had intermediate δ^13C values between those of epibenthic microalgae and particulate organic matter （POM）. The results of a multiple source linear mixing model （IsoSource model） indicated that 50% or more of the organic carbon in the tissues of most consumers was derived from epibenthic microalgae. This indicated that these primary producers were the main food source fueling the lagoon food web. The mean δ^15N values for the 19 consumers varied between 4.93‰and 12.97‰ and indicated four trophic levels in the lagoon. Four macroinvertebrates and zooplankton represented the primary consumers, whilst the other 14 consumers occupied the secondary and tertiary consumer levels. The 19 consumers were divided into three trophic guilds （detritivores/suspension feeders, omnivores and carnivores）.

关 键 词：isotope ^13C ^15N lsoSource model trophic level food web 

分 类 号：S912[农业科学—水产科学]