کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
142849 163158 2009 9 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Stochasticity in evolution
موضوعات مرتبط
علوم زیستی و بیوفناوری علوم کشاورزی و بیولوژیک علوم کشاورزی و بیولوژیک (عمومی)
پیش نمایش صفحه اول مقاله
Stochasticity in evolution
چکیده انگلیسی

The debate over the role of stochasticity is central in evolutionary biology, often summarised by whether or not evolution is predictable or repeatable. Here we distinguish three types of stochasticity: stochasticity of mutation and variation, of individual life histories and of environmental change. We then explain when stochasticity matters in evolution, distinguishing four broad situations: stochasticity contributes to maladaptation or limits adaptation; it drives evolution on flat fitness landscapes (evolutionary freedom); it might promote jumps from one fitness peak to another (evolutionary revolutions); and it might shape the selection pressures themselves. We show that stochasticity, by directly steering evolution, has become an essential ingredient of evolutionary theory beyond the classical Wright–Fisher or neutralist–selectionist debates.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: - Volume 24, Issue 3, March 2009, Pages 157–165
نویسندگان
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