Drought

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A drought is an extended period of months or years when a region notes a deficiency in its water supply whether surface or underground water.

Generally, this occurs when a region receives consistently below average precipitation. It can have a substantial impact on the ecosystem and agriculture of the affected region. Although droughts can persist for several years, even a short, intense drought can cause significant damage and harm the local economy.

Succulent plants are well-adapted to survive long periods of drought.

Many plant species, such as cacti, have adaptations such as reduced leaf area and waxy cuticles to enhance their ability to tolerate drought. Some others survive dry periods as buried seeds. Semi-permament drought produces arid biomes such as deserts and grasslands. Most arid ecosystems have inherently low productivity.

This global phenomenon has a widespread impact on agriculture. Lengthy periods of drought have long been a key trigger for mass migration and played a key role in a number of ongoing migrations and other humanitarian crises in the Horn of Africa and the Sahel.

via Wikipedia – Read more . . .