Geo2:Chapter 13

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Geo2:Chapter 13
2013-03-13 04:41:56

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  1. Dot map
    shows distribution of observation sites
  2. Choropleth map
    an extrapolation of a dot map data
  3. Rapoport's Rule
    • -Ranges are increasing, and number of species decreasing with increasing elevation
    • -Larger ranges in Polar regions
  4. Endemism
    species has a small range, only found in one particular place
  5. Types of endemism
    • 1. Neoendemic
    • -result of recent evolution and speciation in an area a species is found(New species)
    • 2. Paleoendemic
    • -endemic now, larger range in the past 
    • -Sequoia
  6. Circumpolar taxa
    found around the artic or antarctic circles
  7. Pantropical taxa
    found in the tropical zone
  8. Temperate taxa
    found in middle latitudes
  9. Disjunct distribution
    -ranges are divided into two or more geographically separate parts
  10. Amphiregional distribution
    taxa have two widely separated geographic ranges
  11. Amphioceanic
    taxa occur on opposite sides of ocean
  12. Biopolar
    taxa are found in cold polar regions but not in the warmer mid-low latitudes
  13. Biogeographic relicts
    once had larger distributions but have become narrow endemics
  14. Glacial relicts
    • were widespread during the ice age
    • -Ex. Range of Alpine marmot
  15. Evolutionary relict
    • -paleoendemics that are survivors of formerly more widespreade and diverse evoultionary lineages
    • -Ex. Tuatara:lizardlike reptile of New Zealand
  16. Vicariance
    an environmental event that divide the ranges of species into geographically isolated distributions