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Application of exergy as thermodynamic indicator in ecology

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  • Jørgensen, S.E.
  • Nors Nielsen, Søren

Abstract

We introduce a modified form of exergy named eco-exergy as an ecological indicator. Exergy of detritus and of various organisms are found based upon the definition of eco-exergy. Eco-exergy measures a system's deviation from chemical equilibrium. It is, therefore, crucial to find the concentration of detritus and the various organisms at chemical equilibrium which is possible by the calculation of the probability to form detritus and the various organisms by chemical equilibrium. It implies that the probability to form proteins with the right amino acid sequence must be determined by the use of the amount of coding genes. It is stressed that what we determine by this method of exergy calculation is a relative eco-exergy index. It is not possible to find the eco-exergy of entire ecosystems, because they are far too complex to allow us to know all the details of an ecosystem. The eco-exergy indices have been found in a few cases to demonstrate the usefulness of the method and to show how the exergy indices can be translated to applicable ecological information.

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  • Jørgensen, S.E. & Nors Nielsen, Søren, 2007. "Application of exergy as thermodynamic indicator in ecology," Energy, Elsevier, vol. 32(5), pages 673-685.
    • Handle: RePEc:eee:energy:v:32:y:2007:i:5:p:673-685
    DOI: 10.1016/j.energy.2006.06.011
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    1. Christensen, V. & Pauly, D. (eds.), 1993. "Trophic models of aquatic ecosystems," Monographs, The WorldFish Center, number 8432, April.
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    6. Chen, Quan & Zhao, Qian & Chen, Pimao & Lu, Hongfang, 2018. "Effect of exotic cordgrass Spartina alterniflora on the eco-exergy based thermodynamic health of the macrobenthic faunal community in mangrove wetlands," Ecological Modelling, Elsevier, vol. 385(C), pages 106-113.
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    10. Chen, Mingli & Wu, Zijian & Fu, Xinxi & Ouyang, Linnan & Wu, Xiaofu, 2021. "Thermodynamic analysis of an ecologically restored plant community:Number of species," Ecological Modelling, Elsevier, vol. 455(C).
    11. Diaz-Mendez, S.E. & Sierra-Grajeda, J.M.T. & Hernandez-Guerrero, A. & Rodriguez-Lelis, J.M., 2013. "Entropy generation as an environmental impact indicator and a sample application to freshwater ecosystems eutrophication," Energy, Elsevier, vol. 61(C), pages 234-239.
    12. Wu, Zijian & Wu, Xiaofu & Yang, Zhihui & Ouyang, Linnan, 2017. "A simple thermodynamic model for evaluating the ecological restoration effect on a manganese tailing wasteland," Ecological Modelling, Elsevier, vol. 346(C), pages 20-29.
    13. Wu, Zijian & Wu, Xiaofu & Yang, Zhihui & Ouyang, Linnan, 2018. "Internal energy ratios as ecological indicators for description of the phytoremediation process on a manganese tailing site," Ecological Modelling, Elsevier, vol. 374(C), pages 14-21.
    14. Ye, Sufen & Zhang, Luoping & Feng, Huan, 2020. "Ecosystem intrinsic value and its evaluation," Ecological Modelling, Elsevier, vol. 430(C).
    15. Tzanakakis, V.A. & Angelakis, A.N., 2011. "Chemical exergy as a unified and objective indicator in the assessment and optimization of land treatment systems," Ecological Modelling, Elsevier, vol. 222(17), pages 3082-3091.
    16. Liao, Wenjie & Heijungs, Reinout & Huppes, Gjalt, 2012. "Thermodynamic analysis of human–environment systems: A review focused on industrial ecology," Ecological Modelling, Elsevier, vol. 228(C), pages 76-88.
    17. Strijov, Vadim & Granić, Goran & Jurić, Željko & Jelavić, Branka & Antešević Maričić, Sandra, 2011. "Integral indicator of ecological impact of the Croatian thermal power plants," Energy, Elsevier, vol. 36(7), pages 4144-4149.
    18. Bilgen, Selçuk & Sarıkaya, İkbal, 2015. "Exergy for environment, ecology and sustainable development," Renewable and Sustainable Energy Reviews, Elsevier, vol. 51(C), pages 1115-1131.
    19. 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.
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