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Human Pigmentation And Climate Survivability

Melanin Based Color Polymorphism in Human Beings!PT1

A phenomenon observed in response to climate change, flowers are exhibiting an increased production of pigments. These pigments, such as anthocyanins, lend a touch of vibrancy to petals, creating a fanciful display that entices pollinators. Similarly because climate change leads to a rise in temperature and UV-radiation dark coloration among human beings is important and plays a vital role in UV-protection, dark individuals are less adversely affected from climate change extreme temperatures whether extreme cold or global warming.

if this phenomenon implies more solar radiation particularly in habitats of pale individuals is fast occurring and causing great demographic shifts very quickly. Climate warming and High UV radiation leads to a decrease in biodiversity. In other words species that have difficulty in the changed climate start to reduce in number or disappear altogether. Organisms can deal with the new prevailing environmental conditions by one of two main routes, namely evolving new genetic adaptations or through phenotypic plasticity to modify behavior and physiology.

Melanin-based coloration has important functions in animals including a role in camouflage and thermoregulation, protection against UV-radiation and pathogens and, furthermore, genes involved in melanogenesis can pleiotropically regulate behavior and physiology. In this article, I review the current evidence that differently colored individuals are differentially sensitive to climate change. Predicting which dark or pale color variants (or morphs) will be more penalized by climate change will depend on the adaptive function of melanism in each species as well as how the degree of coloration covaries with behavior and physiology. This is the basis of the theory of natural selection.


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