کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
979799 933392 2006 9 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Population dynamics in heterogeneous conditions
موضوعات مرتبط
مهندسی و علوم پایه ریاضیات فیزیک ریاضی
پیش نمایش صفحه اول مقاله
Population dynamics in heterogeneous conditions
چکیده انگلیسی
Using a Monte Carlo approach we study a simple lattice model of populations living in a habitat where the external conditions are changing in space and in time. We show that above a certain value of the climatic gradient, the population gathers at a restricted part of the lattice. The average trait of the individuals follows the optimum. We also have shown that there exists a range of gradient values within which a population has over 10% chance of survival, while outside it most likely to become extinct. We have found that this phenomenon depends on the selection pressure and we have constructed a phase diagram in the selection-gradient plane. In the case of the time-dependent optimum, the populations go extinct after a long time, depending on the speed of the changes.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Physica A: Statistical Mechanics and its Applications - Volume 362, Issue 2, 1 April 2006, Pages 504-512
نویسندگان
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