Title of article :
Coexistence introducing regulation of environmental conditions
Author/Authors :
Seto، نويسنده , , Mayumi and Akagi، نويسنده , , Tasuku، نويسنده ,
Issue Information :
روزنامه با شماره پیاپی سال 2007
Abstract :
Interactions between environmental conditions and environment-affecting species have not been investigated extensively. In this study, the population dynamics of species yielding regulative feedback between temperature (a representative of environmental condition) and species with a temperature-altering trait was examined. We considered a simple closed model that described the population of two species (at least one of them had a temperature-altering trait) competing for one resource. The long-term outcomes of the competition and changes of temperature were explored against increasing background temperature. As a result of simulations, the regulation of temperature was accompanied by the coexistence of two species, which was contrary to the ‘Gauseʹs exclusion principle’. The steady-state analysis showed that (i) the temperature-altering trait allowed species to coexist and (ii) the coexistence of species with the trait could introduce the regulation of temperature. A ‘trade-off’ in their ability to utilize a resource plays a key role in this coexistence and homeostasis of temperature. This may imply that actual environmental conditions can be automatically stabilized by resource competition among species in natural ecosystems.
Keywords :
Trade-off , Feedback , resource competition , homeostasis , Coexistence
Journal title :
Journal of Theoretical Biology
Journal title :
Journal of Theoretical Biology