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How is migration based on circannual rhythms poorly suited for adaptation to global climate change?
To determine: The way in which “the migration based on circannual rhythms is poorly suited for adaptation to global climate change”.
Introduction: Circannual rhythms are biological rhythms that span a period of one year. These rhythms are generated endogenously in the organisms like several migratory birds and others. These rhythms are regulated by seasonal changes in the length of the photoperiod.
Explanation of Solution
Generally, migration and reproduction is correlated with food availability. The circadian rhythms persist even in constant conditions such as constant darkness or constant light, indicating that these rhythms are endogenously regulated. Circannual rhythms help animals to anticipate the precise time for reproduction, migration, and others. This maximizes the survival of offspring and also ensures the protection of animals from extreme weather. However, the migration that dependent on circannual rhythm is poorly suited for adaptation to global climate change. This is because it can lead to migration of animals to the place before the arrival of favorable condition. This will lead to disruption of their internal biological clock. Over the time, the species can also become extinct.
Circannual rhythms are very essential to anticipate the precise timing for important events such as reproduction and migration. In this way, they enhance the survival of the animals.
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