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Modeling the species shift from Potamogeton malaianus Miq. to Potamogeton maackianus A. Bennett in the experiment pond

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  • Han, Hongjuan
  • Hu, Weiping

Abstract

The outdoor pond experiment has been conducted from 2005 September till now, during which an interesting phenomenon of submerged macrophyte species shift was observed in 2007. A new macrophyte species, Potamogeton maackianus A. Bennett, appeared in 2007, and replaced the original species, Potamogeton malaianus Miq. gradually over 10months. In order to describe the submerged macrophyte species shift from Potamogeton malaianus to Potamogeton maackianus, a structural dynamic model had been developed by using eco-exergy index as the goal function, coupling the size functions of main biological components of the field experimental pond ecosystem. There were totally 5 size functions, including individual size of macrophyte, phytoplankton and zoobenthos, and leaf area index of macrophyte and photosynthetic area index of phytoplankton. The main physiological parameters (such as maximum growth rate, mortality rate and so on) of macrophyte, phytoplankton and zoobenthos had been characterized by the above concerned size functions. Eco-exergy index was optimized based on different combinations of these 5 size functions, which were changed ±5%, ±10%, ±15%, and ±20% every 10days during the simulation. The model yielded acceptable calibrations by comparing with the results from the pond experiments for the key state variables: total biomass of macrophyte, total dissolved nitrogen and phosphorous and organic nitrogen and phosphorous from September 22, 2005 to December 31, 2008.

Suggested Citation

  • Han, Hongjuan & Hu, Weiping, 2012. "Modeling the species shift from Potamogeton malaianus Miq. to Potamogeton maackianus A. Bennett in the experiment pond," Ecological Modelling, Elsevier, vol. 242(C), pages 10-19.
    • Handle: RePEc:eee:ecomod:v:242:y:2012:i:c:p:10-19
    DOI: 10.1016/j.ecolmodel.2012.05.017
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    References listed on IDEAS

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    1. Zhang, Jingjie & Gurkan, Zeren & Jørgensen, Sven Erik, 2010. "Application of eco-exergy for assessment of ecosystem health and development of structurally dynamic models," Ecological Modelling, Elsevier, vol. 221(4), pages 693-702.
    2. Han, Hongjuan & Chen, Yonggen & Jørgensen, Sven Erik & Nielsen, Søren Nors & Hu, Weiping, 2009. "A system-dynamic model on the competitive growth between Potamogeton malaianus Miq. and Spirogyra sp," Ecological Modelling, Elsevier, vol. 220(18), pages 2206-2217.
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    1. Hu, Weiping, 2016. "A review of the models for Lake Taihu and their application in lake environmental management," Ecological Modelling, Elsevier, vol. 319(C), pages 9-20.

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