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The food web structure and ecosystem properties of a filter-feeding carps dominated deep reservoir ecosystem

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  • Liu, Qi-Gen
  • Chen, Yong
  • Li, Jia-Le
  • Chen, Li-Qiao

Abstract

An Ecopath model was constructed to describe the ecosystem of Lake Qiandaohu, a stock-enhanced large deep Chinese reservoir with silver carp (Hypophthalmichthys molitrix) and bighead carp (Aristichthys nobilis) dominated in its pelagic community. The food web structure and ecosystem property of the reservoir were analyzed and evaluated. The results showed that there were seven trophic levels (TLs) in the system, with the trophic flows primarily occurring through the first four TLs. The food web structure of this ecosystem was characterized with a bulged intermediate trophic level, which was contrary to the wasp-waist food web structure occurred in most natural aquatic ecosystems. The corresponding trophic flow pattern showing by transfer efficiencies (TEs) between TLs indicated that the trophic flows primarily went through from TL I to II with a high TE (of over 50%) and through a flow loop or short cut between detritus and TL II but greatly reduced from TL II to III with a lowest TE of 2.5% due to the bulged biomass at TL II. The trophic flow loop greatly increased the throughput recycled, which, together with high connectance index (CI), system omnivory index (SOI), Finn's cycled index (FCI) and Finn's mean path length (FML), might be beneficial to the maintaining of ecosystem stability. Finally, ecosystem property indices showed that this reservoir had a high value of Pp/R and Pp/B, indicating this ecosystem of short history was immature, but highly productive. This silver carp and bighead carp dominated deep reservoir ecosystem had both the characteristics of high productivity of an immature ecosystem and the feature of high stability of a mature ecosystem.

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  • Liu, Qi-Gen & Chen, Yong & Li, Jia-Le & Chen, Li-Qiao, 2007. "The food web structure and ecosystem properties of a filter-feeding carps dominated deep reservoir ecosystem," Ecological Modelling, Elsevier, vol. 203(3), pages 279-289.
    • Handle: RePEc:eee:ecomod:v:203:y:2007:i:3:p:279-289
    DOI: 10.1016/j.ecolmodel.2006.11.028
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    References listed on IDEAS

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    1. Shahid Naeem & Shibin Li, 1997. "Biodiversity enhances ecosystem reliability," Nature, Nature, vol. 390(6659), pages 507-509, December.
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    1. Guo, Chuanbo & Ye, Shaowen & Lek, Sovan & Liu, Jiashou & Zhang, Tanglin & Yuan, Jin & Li, Zhongjie, 2013. "The need for improved fishery management in a shallow macrophytic lake in the Yangtze River basin: Evidence from the food web structure and ecosystem analysis," Ecological Modelling, Elsevier, vol. 267(C), pages 138-147.
    2. Jia, Peiqiao & Hu, Menghong & Hu, Zhongjun & Liu, Qigen & Wu, Zhen, 2012. "Modeling trophic structure and energy flows in a typical macrophyte dominated shallow lake using the mass balanced model," Ecological Modelling, Elsevier, vol. 233(C), pages 26-30.
    3. Shan, Kun & Li, Lin & Wang, Xiaoxiao & Wu, Yanlong & Hu, Lili & Yu, Gongliang & Song, Lirong, 2014. "Modelling ecosystem structure and trophic interactions in a typical cyanobacterial bloom-dominated shallow Lake Dianchi, China," Ecological Modelling, Elsevier, vol. 291(C), pages 82-95.
    4. Han, Jeong-Ho & Kumar, Hema K. & Lee, Jae Hoon & Zhang, Chang-Ik & Kim, Se-Wha & Lee, Jung-Ho & Kim, Sang Don & An, Kwang-Guk, 2011. "Integrative trophic network assessments of a lentic ecosystem by key ecological approaches of water chemistry, trophic guilds, and ecosystem health assessments along with an ECOPATH model," Ecological Modelling, Elsevier, vol. 222(19), pages 3457-3472.
    5. Prado, Patricia & Ibáñez, Carles & Caiola, Nuno & Reyes, Enrique, 2013. "Evaluation of seasonal variability in the food-web properties of coastal lagoons subjected to contrasting salinity gradients using network analyses," Ecological Modelling, Elsevier, vol. 265(C), pages 180-193.
    6. Chea, Ratha & Guo, Chuanbo & Grenouillet, Gaël & Lek, Sovan, 2016. "Toward an ecological understanding of a flood-pulse system lake in a tropical ecosystem: Food web structure and ecosystem health," Ecological Modelling, Elsevier, vol. 323(C), pages 1-11.
    7. Ortiz, Marco & Berrios, Fernando & Campos, Leonardo & Uribe, Roberto & Ramirez, Alejandro & Hermosillo-Núñez, Brenda & González, Jorge & Rodriguez-Zaragoza, Fabián, 2015. "Mass balanced trophic models and short-term dynamical simulations for benthic ecological systems of Mejillones and Antofagasta bays (SE Pacific): Comparative network structure and assessment of human ," Ecological Modelling, Elsevier, vol. 309, pages 153-162.
    8. Hossain, Md. Monir & Matsuishi, Takashi & Arhonditsis, George, 2010. "Elucidation of ecosystem attributes of an oligotrophic lake in Hokkaido, Japan, using Ecopath with Ecosim (EwE)," Ecological Modelling, Elsevier, vol. 221(13), pages 1717-1730.
    9. Duan, L.J. & Li, S.Y. & Liu, Y. & Moreau, J. & Christensen, V., 2009. "Modeling changes in the coastal ecosystem of the Pearl River Estuary from 1981 to 1998," Ecological Modelling, Elsevier, vol. 220(20), pages 2802-2818.

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