Food web structure and trophic levels in a saltwater pond sea cucumber and prawn polyculture system

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• 作者：Kai Guo ; Wen Zhao ; Shan Wang ; Baozhan Liu ; Peng Zhang
• 关键词：Aposticbopus japonicas ; Penaeus japonica ; stable isotopes ; food web structure ; diet composition ; trophic level
• 刊名：Acta Oceanologica Sinica
• 出版年：2016
• 出版时间：April 2016
• 年：2016
• 卷：35
• 期：4
• 页码：58-62
• 全文大小：129 KB
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• 作者单位：Kai Guo (1)
  Wen Zhao (1)
  Shan Wang (1)
  Baozhan Liu (2)
  Peng Zhang (1)
  
  1. Key Laboratory of Hydrobiology in Liaoning Province, Dalian Ocean University, Dalian, 116023, China
  2. Offshore Environment Services Co., Ltd., Tianjin, 300452, China
  
• 刊物主题：Oceanography; Climatology; Ecology; Engineering Fluid Dynamics; Marine & Freshwater Sciences; Environmental Chemistry;
• 出版者：Springer Berlin Heidelberg
• ISSN：1869-1099

文摘

The food sources of aquacultured Apostichopus japonicus and the trophic levels of organisms in a sea cucumber (A. japonicus) and prawn (Penaeus japonica) polyculture system in a saltwater pond in Zhuanghe, Liaoning Province were examined using carbon and nitrogen stable isotopes. Across organisms, δ13C ranged from (–25.47±0.20)‰ to (–16.48±0.17)‰ (mean±SD), and δ15N ranged from (4.23±0.49)‰ to (12.44±0.09)‰. The δ13C and δ15N contents of A. japonicus, P. japonica and Fenneropenaeus chinensis were comparatively higher than those of other organisms. Values of δ13C and δ15N revealed that P. japonica, Hemigrapsus sanguineus and Neomysis japonica comprised the largest component of the diet of A. japonicus. The mean trophic level of the organisms in this saltwater pond polyculture system was (2.75±0.08). P. japonica, A. japonicus, F. chinensis, Synechogobius hasta and Neomysis japonica were in the 3rd trophic level (2–3); jellyfish, H. sanguineus and zooplankton were in the 2nd trophic level (1–2); and Enteromorpha prolifera, benthic microalgae, periphyton and suspended matter primarily consisting of phytoplankton, bacteria and humus were in the primary trophic level (0–1).