کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
4496985 1318910 2011 11 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Adaptive diversification of a plastic trait in a predictably fluctuating environment
موضوعات مرتبط
علوم زیستی و بیوفناوری علوم کشاورزی و بیولوژیک علوم کشاورزی و بیولوژیک (عمومی)
پیش نمایش صفحه اول مقاله
Adaptive diversification of a plastic trait in a predictably fluctuating environment
چکیده انگلیسی

There is substantial evidence that evolutionary diversification can occur in allopatric conditions through reduction in the degree of phenotypic plasticity when an isolated population encounters a novel, more stable environment. Plasticity is no longer favored in the new environment, either because it carries an inherent physiological cost or because it leads to production of suboptimal phenotypes. In order to explore the role of phenotypic plasticity in sympatric diversification, we modeled the ecological and evolutionary dynamics of Escherichia coli bacteria in batch cultures. Our results describe an evolutionary pathway leading to metabolic diversification in a sympatric environment without spatial structure. In an environment that fluctuates widely and predictably, evolutionary branching leads to diversification and stable coexistence of generalist and specialist ecotypes for some combinations of parameters. Diversification and stable coexistence occur when reaction norms are steep and trade-offs between metabolic pathways are convex. We conclude that, in principle, diversification due to reduced plasticity can occur without allopatric isolation, reduced environmental variability, or an explicit cost of plasticity.


► We model metabolic diversification in a predictably fluctuating environment.
► Adaptive diversification occurs sympatrically without spatial structure.
► Evolutionary branching can lead to diversification and coexistence of ecotypes.
► Evolution of specialist ecotypes is an adaptive reduction of phenotypic plasticity.
► Diversification occurs when reaction norms are steep and trade-offs are convex.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Theoretical Biology - Volume 285, Issue 1, 21 September 2011, Pages 58–68
نویسندگان
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