South America - Wildlife, Ecosystems, Biodiversity

South America

Table of Contents

Introduction
Geologic history
- The Precambrian
  - The Trans-Amazonian cycle
  - The Brazilian cycle
- The Paleozoic Era
  - Early Paleozoic events
  - The formation of Pangea
- The Mesozoic and Cenozoic eras
  - Events in the Mesozoic
  - The Andean orogeny
    - The Northern Andes
    - The Central Andes
    - The Southern Andes
  - Present geologic setting
The land
- Relief
  - The Andes Mountains
  - The plateaus
  - The lowlands
- Drainage
  - Rivers
  - Lakes
  - Marshes and swamps
- Soils
- Climate
  - Factors influencing climate
  - Climatic regions
    - Tropical climates
    - Temperate climates
    - Arid climates
    - Cold climates
- Plant life
  - Grasslands
    - Savannas
    - Pampas
  - Vegetation zones
    - Tropical and subtropical rainforests
    - Tropical deciduous forests
    - Caatinga
    - South Brazilian forests
    - Xerophytic associations
    - Subantarctic rainforests
    - Mountain vegetation
  - Human influences on vegetation
- Animal life
  - Principal faunal types
    - Fish and bird life
    - Mammals
    - Amphibians and reptiles
    - Arthropods
  - Ecological communities
    - The Amazonian and Guianan forests
    - East-central plateaus and lowlands
    - The Argentinian Pampas
    - The southern Chilean forests
    - The high Andes
    - The arid west coast
  - Human influences on wildlife
The people
- Ethnic origins and migrations
  - Indians
  - Iberians
  - Africans
  - Postindependence overseas immigrants
- Population and ecological distribution
  - The present population
  - Culture areas
    - American Indian heritage regions
    - African heritage regions
    - European heritage regions
  - Linguistic patterns
  - Religious patterns
  - Sociological changes
- Demographic patterns
  - The demographic transition and fertility
  - Effects of rapid population increase
The economy
- Resources
  - Mineral resources
    - Mineral fuels
    - Iron and ferroalloys
    - Nonferrous base metals
    - Precious metals and gemstones
    - Nonmetallic deposits
  - Biological resources
    - Botanical resources
    - Animal resources
- Forestry and fishing
- Agriculture
  - Principal crops
    - Food crops
    - Specialized cash crops
  - Livestock
- Industry
- Power and irrigation
- Trade
  - Internal trade
  - External trade
- Transportation
  - Roads
  - Railways
  - Maritime transport
  - Waterways
  - Air transportation
- Cultural life

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South American animal life is particularly rich and well diversified as a result of the wide range of habitats. Moreover, because of its isolation from the rest of the world during Paleogene and Neogene times (about 66 to 2.6 million years ago), the South American landmass is characterized by considerable biological originality. Many animals belong to exclusive groups, and even at the family level the percentage of endemic forms is high. Speciation has reached a higher degree in South America than in other parts of the world. Nonetheless, there are some similarities between South America’s fauna and that of other ...(100 of 23598 words)

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