Genetic erosion impedes adaptive responses to stressful environments

@article{Bijlsma2012GeneticEI,
  title={Genetic erosion impedes adaptive responses to stressful environments},
  author={Rudolf Bijlsma and Volker Loeschcke},
  journal={Evolutionary Applications},
  year={2012},
  volume={5},
  pages={117 - 129}
}
Biodiversity is increasingly subjected to human‐induced changes of the environment. To persist, populations continually have to adapt to these often stressful changes including pollution and climate change. Genetic erosion in small populations, owing to fragmentation of natural habitats, is expected to obstruct such adaptive responses: (i) genetic drift will cause a decrease in the level of adaptive genetic variation, thereby limiting evolutionary responses; (ii) inbreeding and the concomitant… 

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References

SHOWING 1-10 OF 141 REFERENCES

Adaptation and Evolutionary Rescue in Metapopulations Experiencing Environmental Deterioration

TLDR
It is found that adaptation was favored by gradual deterioration and local dispersal, and the frequency of evolutionary rescue depended on both the prior rate of deterioration and the rate of dispersal.

Evolutionary rescue can prevent extinction following environmental change.

TLDR
It is shown that ER is possible, and that the recovery of the population may occur within 25 generations, and a clear threshold in population size is observed whereby the ancestral population size must be sufficiently large to counter stochastic extinction and contain resistant individuals.

Molecular ecology of global change

TLDR
The genetic basis of two traits with a critical role under climate change, stress tolerance and photoperiod behaviour, is beginning to be understood for model organisms, providing a starting point for candidate gene approaches in targeted nonmodel species.

Consequences of fragmentation for the ability to adapt to novel environments in experimental Drosophila metapopulations

TLDR
The results have two important implications: (i) Long-term fragmentation in combination with restricted gene flow will limit the adaptive potential of individual subpopulations because adaptive variation will become distributed among populations rather than within populations.

Interplay between habitat fragmentation and climate change: inbreeding affects the response to thermal stress in Drosophila melanogaster

TLDR
It is concluded that inbreeding and thermal stress act synergistically and argue that the conse- quences of climate change and habitat fragmentation should preferably be studied in combination rather than in isolation.

Climate change and evolution: disentangling environmental and genetic responses

TLDR
The available evidence points to the overall conclusion that many responses perceived as adaptations to changing environmental conditions could be environmentally induced plastic responses rather than microevolutionary adaptations, and clear‐cut evidence indicating a significant role for evolutionary adaptation to ongoing climate warming is conspicuously scarce.

Inbreeding depression in adaptive plasticity under predation risk in a freshwater snail

TLDR
Overall, inbred snails exhibited reduced defences, but more importantly, inbreeding reduced the expression of predator-induced adaptive plasticity.

Patterns of genetic variation in anthropogenically impacted populations

  • J. DiBattista
  • Environmental Science, Psychology
    Conservation Genetics
  • 2007
TLDR
It is found that human disturbances are associated with weak, but consistent changes in neutral genetic variation within natural populations, with particular attention paid to the effects of habitat fragmentation.

WHEN DOES EVOLUTION BY NATURAL SELECTION PREVENT EXTINCTION?

  • R. GomulkiewiczR. Holt
  • Environmental Science, Biology
    Evolution; international journal of organic evolution
  • 1995
Understanding population responses to novel environments is a central concern of both evolutionary biology and ecology (Maynard Smith 1989; Bradshaw 1991; Hoffman and Parsons 1991; Peters and Lovejoy

Environmental Change, Phenotypic Plasticity, and Genetic Compensation

TLDR
It is shown that genetic compensation may lead to a cryptic form of reproductive isolation between populations evolving in different environments, may explain some puzzling cases in which heritable traits exposed to strong directional selection fail to show the expected evolutionary response, and may complicate efforts to monitor populations for signs of environmental deterioration.
...