The implications of nongenetic inheritance for evolution in changing environments.
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A research program encompassing experimental studies that test for transgenerational effects of a range of environmental factors, followed by theoretical and empirical studies on the population‐level consequences of such effects are outlined.Abstract:
Nongenetic inheritance is a potentially important but poorly understood factor in population responses to rapid environmental change. Accumulating evidence indicates that nongenetic inheritance influences a diverse array of traits in all organisms and can allow for the transmission of environmentally induced phenotypic changes (‘acquired traits’), as well as spontaneously arising and highly mutable variants. We review models of adaptation to changing environments under the assumption of a broadened model of inheritance that incorporates nongenetic mechanisms of transmission, and survey relevant empirical examples. Theory suggests that nongenetic inheritance can increase the rate of both phenotypic and genetic change and, in some cases, alter the direction of change. Empirical evidence shows that a diversity of phenotypes – spanning a continuum from adaptive to pathological – can be transmitted nongenetically. The presence of nongenetic inheritance therefore complicates our understanding of evolutionary responses to environmental change. We outline a research program encompassing experimental studies that test for transgenerational effects of a range of environmental factors, followed by theoretical and empirical studies on the population-level consequences of such effects.read more
Citations
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References
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Epigenetic Transgenerational Actions of Endocrine Disruptors and Male Fertility
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Niche Construction: The Neglected Process in Evolution
TL;DR: This book extends evolutionary theory by formally including niche construction and ecological inheritance as additional evolutionary processes, and demonstrates how the theory can resolve long-standing problems in ecology, particularly by advancing the sorely needed synthesis of ecology and evolution.
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