Demographic Dynamics, Migration, and Economic Sectors
Population Dynamics
As the population evolves, several key indicators define its structure:
- Birth Rate: The number of births occurring in a population.
- Fertility Rate: An estimate of the average number of children a woman will have in her lifetime.
- Mortality Rate: The number of deaths occurring in a population.
- Infant Mortality: Records the number of children who die before completing their first year of life.
- Natural or Vegetative Growth: The balance between births and deaths in a specific area.
Life Expectancy and Population Age
Life expectancy in underdeveloped countries is generally lower than in developed nations, often resulting in a younger population structure.
Migration Patterns
Migration refers to the displacement of a population involving a change of residence. Most migrations are driven by economic reasons, though some are politically motivated.
Types of Migration
- Forced: Movement against one's will.
- Voluntary: Movement by personal choice.
- Temporary: Moving for a fixed period to study or work.
- Permanent: People do not return to their place of origin.
- Domestic (National): Takes place within the same country.
- External (International): Movement between different countries.
Economic Entities
- Families: Can be formed by one or more persons.
- Companies: Entities engaged in producing goods and services to obtain economic benefits.
- Public: Owned or managed by the state.
- Private: Owned by an individual or a private entity.
Agricultural Systems
- Bocage: Enclosed fields.
- Openfield: Open, unenclosed fields.
- Smallholdings: Small agricultural plots.
- Estates: Large land extensions.
- Rainfed Agriculture: Crops that receive only rainwater.
- Irrigated Agriculture (Regadío): Crops receiving water from artificial systems.
- Polyculture: Different species grown, generally in small plots.
- Monoculture: Cultivating only one kind of crop.
Livestock Farming
- Intensive Livestock: Retail holdings requiring significant investment and manpower; often involves feedlots.
- Extensive Livestock: Large-scale farms requiring little investment or manpower; characteristic of cattle or sheep grazing.
Agriculture and Industry
- Market Agriculture: In developed countries, the agricultural revolution began in the late 18th century.
- Traditional Agriculture: Subsistence farming common in underdeveloped countries.
- Industrial Revolution: A transformation supported by leading industries.
Transport Services
Transport services facilitate the transfer of passengers or goods:
- Land Transport: Road and rail.
- Naval Transport: Maritime and river transport.
- Air Transport: Transfer of passengers or low-volume goods.
The Tertiary Sector in Spain
The service sector accounts for approximately 70% of the economy in Spain.