Untitled - Unit 2 Population Demographics and Migration...

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Unit 2: Population, Demographics and Migration Intro pic note: Picture: Lagos, Nigeria and Dhaka Bangladesh, Tokyo intersection→ Dense population Population Introduction For a known time, population was relatively stable as for thousands of years the world had very little change. In the 1800s global population began to grow rapidly. In the: Industrial region→ there was flatter growth Developing region→ there was rapid growth Thomas Malthus and Population (1766-1834) Malthusian Theory→ Malthus theorized that population growth is out of control as that we running out of resources, however, the real problem wasn’t population explosion. Problem of Population Distribution Not increasing evenly around the world. Geography is rarely consistent. Geo-demography is inconsistent with the surface of the Earth. Ex. Sub Saharan Africa→ most rapid growth Population Growth is a Problem→ Natural Resource for Subsistence Distribution. Uneven distribution of resources vs uneven distribution of people. The spatial Distribution and Density of People are not perfectly correlated, along with the growth is not even around the world. The distribution of soils, climate and natural resources is also not correlated to people growth. What are the primary spatial patterns of population on the Earth’s surface today? Ex. Europe, India (going to be the world’s largest country), near coastal or tidal water, East Asia, more in costal lower plains, east coast border of United States, Countries in Africa Ex. Coastal Plains in the Americas, North European Plains best agricultural point are places with low density. Major population Densities/clusters: East Asia, South Asia…… Major Population Clusters: China, India Population Density Arithmetic Density (Crude Population Density)→ number of people per unit of land (any unit) 20 people/5 square mile of land=4 people per square mile Physiological density→ number of people per arable land (Farmable Land/Cultivable Land/ Usable soil, good condition for farming) Ex. 20 people, 5 square mile, but only 2 miles are arable 20/2=10 people per square mile Example: Island of Java High population Density on a limited land space Extremely Mountainous, very roughed→ clusters in the valleys→ makes the density higher Example 2: Egypt 90% of the population of Egypt is with 15 miles of the Nile river, valley or the delta. Very large country but very dense around the Nile Delta Crude Birth Rate→ number of live birth(stillbirth doesn’t count) per year per 1000 (1000 b/c it gives standard measurement) people in a given population. Example of Crude Birth Rate Country of 2 million and 40,0000 live birth per year yields ((40,000/2,000,000)*1000)= 20 per 1000. Why crude? → doesn’t tell us anything about the geographical distribution, and issues with recording.
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