Selecting landmarks in novel environments

2009 ◽  
Author(s):  
Jared E. Miller ◽  
Laura A. Carlson
Keyword(s):  
Novel Environments

scholarly journals Long-Term Experimental Evolution in Escherichia coli. IV. Targets of Selection and the Specificity of Adaptation

Genetics ◽  
1996 ◽  
Vol 143 (1) ◽  
pp. 15-26 ◽  
Author(s):  
Michael Travisano ◽  
Richard E Lenski
Keyword(s):  
Escherichia Coli ◽  
Experimental Evolution ◽  
Common Ancestor ◽  
The Novel ◽  
Physiological Mechanisms ◽  
Outer Membranes ◽  
Limiting Nutrient ◽  
Novel Environments ◽  
Uptake Mechanisms

Abstract This study investigates the physiological manifestation of adaptive evolutionary change in 12 replicate populations of Escherichia coli that were propagated for 2000 generations in a glucose-limited environment. Representative genotypes from each population were assayed for fitness relative to their common ancestor in the experimental glucose environment and in 11 novel single-nutrient environments. After 2000 generations, the 12 derived genotypes had diverged into at least six distinct phenotypic classes. The nutrients were classified into four groups based upon their uptake physiology. All 12 derived genotypes improved in fitness by similar amounts in the glucose environment, and this pattern of parallel fitness gains was also seen in those novel environments where the limiting nutrient shared uptake mechanisms with glucose. Fitness showed little or no consistent improvement, but much greater genetic variation, in novel environments where the limiting nutrient differed from glucose in its uptake mechanisms. This pattern of fitness variation in the novel nutrient environments suggests that the independently derived genotypes adapted to the glucose environment by similar, but not identical, changes in the physiological mechanisms for moving glucose across both the inner and outer membranes.

scholarly journals Multiple Adaptive Substitutions During Evolution in Novel Environments

Genetics ◽  
2011 ◽  
Vol 189 (3) ◽  
pp. 1029-1043 ◽  
Author(s):  
Kavita Jain ◽  
Sarada Seetharaman
Keyword(s):  
Novel Environments

Are There Advantages of Having Sex in Novel Environments?

Oikos ◽  
1997 ◽  
Vol 80 (2) ◽  
pp. 411 ◽  
Author(s):  
Valery E. Forbes ◽  
E. Davis Parker ◽  
Peter Calow
Keyword(s):  
Novel Environments

Individual differences in the representations of novel environments

2005 ◽  
Vol 25 (1) ◽  
pp. 97-109 ◽  
Author(s):  
Olessia Blajenkova ◽  
Michael A. Motes ◽  
Maria Kozhevnikov
Keyword(s):  
Individual Differences ◽  
Novel Environments

Adaptable Ancestors

2020 ◽  
pp. 71-91
Author(s):  
David F. Bjorklund
Keyword(s):  
Natural Selection ◽  
Evolutionary Change ◽  
Behavioral Changes ◽  
Social Transmission ◽  
Significant Extent ◽  
Transmission Of Information ◽  
Selection Behavior ◽  
Novel Environments ◽  
High Level ◽  
Or Genes

The high level of plasticity shown by children today was also a feature of our forechildren. Experiences early in life can modify the morphology or behavior of an animal and result in new pressures that can be the focus of natural selection. Behavior, in fact, takes the lead in evolution, because it is more susceptible to change than morphology or genes. Most of the changes early in development, at least for mammals, were accomplished in the presence of mothers. To a significant extent, mothers are the environment for young mammals, making mothers the environment for evolutionary change. Significant behavioral changes in evolution are most likely to occur in large-brained animals, who are better able to deal with novel environments through innovation and social transmission of information than smaller-brained animals.

Sign in / Sign up

Export Citation Format

Share Document