کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
4378806 1617549 2007 7 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Investigation of thermodynamic properties in an ecological model developing from ordered to chaotic states
موضوعات مرتبط
علوم زیستی و بیوفناوری علوم کشاورزی و بیولوژیک بوم شناسی، تکامل، رفتار و سامانه شناسی
پیش نمایش صفحه اول مقاله
Investigation of thermodynamic properties in an ecological model developing from ordered to chaotic states
چکیده انگلیسی

In any ecosystem the equilibrium condition may gradually turn into a chaotic situation for different reasons. In this paper a three species (phytoplankton, zooplankton and fish) model is proposed. Rate parameters are changed according to the change of the size of the organisms. The model is run in different conditions with different sizes of zooplankton by increasing the grazing rate and consequently decreasing the half saturation constant of this organisms following allometric principles. The system exhibits different states (equilibrium point–stable limit cycle–doubling and ultimately chaos) by gradual increment of zooplankton grazing rate and decrease of half saturation constant. This paper also tests the high level of exergy (thermodynamic goal function) of the systems at the edge of oscillation before entering into the chaotic situation. This high level of information supports the hypothesis that the system can coordinate the most complex behavior in these situations.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Ecological Modelling - Volume 204, Issues 1–2, 24 May 2007, Pages 40–46
نویسندگان
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