Niche construction

Article Abstract:

Organisms do not only adapt to their environment, but also modify it to suit their needs. Niche construction is a feedback to the evolutionary process. It changes the initial selected environment gradually. For this feedback to effect change in the environment, it will have to be consistent for a length of time. This makes niche structuring method a genetic legacy. However, this is also coupled with generational modification of niche structuring. There are other significant implications of this synthesis between modification and genetic legacy which need further examination.

Research, Habitat (Ecology), Habitat modification, Physiological regulation, Biological control systems, Niche (Ecology), Niches (Ecology)

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How does immigration influence local adaptation? A reexamination of a familiar paradigm

Article Abstract:

It is argued that a good understanding of population dynamics can lead to a better appreciation of the impact of immigration on niche conservatism at species' borders. It may also promote a deeper understanding of such impact on niche conservatism in any species with populations which would become extinct deterministically in the absence of regular immigration, and which is beyond its current niche due to immigration. A simple one-locus haploid model that considers population dynamics, gene flow and local selection is examined.

Population genetics, Emigration and immigration, Population transfers

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