What causes a drought in an ecosystem?
Ecological drought may be driven by natural phenomena, such as lack of rainfall or warming temperatures, and it may result in or be exacerbated by multiple competing demands on existing limited water supplies.
Where does a drought occur?
In the United States, droughts are most likely to occur in the Midwest and the South. In the United States, droughts can have major impact on agriculture, recreation and tourism, water supply, energy production, and transportation.
What are the causes of drought in India?
There are four major reasons for drought in India- delay in the onset of monsoon/ failure of monsoon, variability of monsoon rainfall, long break in monsoon and areal difference in the persistence of monsoon. The variability in rainfall is a major cause of drought.
What causes drought in Africa?
Drought in South Africa caused by El Niño, human action and climate change. The present drought in Cape Town has been caused by extremely poor rainfall in recent months, with the result that the water supplies are under enormous pressure.
What is the main reason of desertification?
‘Climatic variations’ and ‘Human activities’ can be regarded as the two main causes of desertification. removal of the natural vegetation cover（by taking too much fuel wood）, agricultural activities in the vulnerable ecosystems of arid and semi-arid areas, which are thus strained beyond their capacity.
What will happen if desertification continues?
Across the world, desertification affects the livelihoods of millions of people who rely on the benefits that dryland ecosystems can provide. Some 10 to 20% of drylands are already degraded, and ongoing desertification threatens the world’s poorest populations and the prospects of poverty reduction.
Does desertification cause harsh weather conditions?
Another impact of desertification is an increase in sand and dust storms.