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Analysis of Effects of Multiple Environmental Factors on Early Life-history for Growth and Stress Accumulation Using a Dynamic-state-dependent Model

  • Journal of Environmental Impact Assessment
  • Abbr : J EIA
  • 2019, 28(1), pp.49-62
  • Publisher : Korean Society Of Environmental Impact Assessment
  • Research Area : Engineering > Environmental Engineering

Who-Seung Lee ORD ID 1

1한국환경정책·평가연구원

Accredited

ABSTRACT

Environmental changes can affectlife-history traits, such as growth rate and reproduction, and organisms adapt on a given environmental condition to maximize ecological fitness. This study shows the effects of watertemperature and dissolved oxygen level on early growth and accumulated damage in fish using a dynamic-state-dependent model.I have hypothesized thatthe level offoraging activity is related to growth and stress and so the optimal level can maximize reproductive success - ultimately,fitness. The criticaltemperature and dissolved oxygen (DO)is also defined as inducing the maximum growth rate atthe level. So,the model predicts the highest growth rate at oxygen saturation and lower growth rate atlower or higherlevel of DO in water. Lower DO (i.e., hypoxia) causes slower growth rate through higher amount of accumulated stress whereas higher DO(i.e., hyperoxia)induces faster growth rate, but smaller body size. In addition, I show that there is lower impact when considering simple orindependent environmentalfactors on environmental assessment. My findings suggest that multiple environmental factors as physiological ecology approach should be considered to improve impact assessment in environmental changes and a further study is needed to develop advanced assessment tools considering multiple environmental factors.

Citation status

* References for papers published after 2023 are currently being built.