Alfred Wallace

1
Alfred Wallace

• By Mike and Steve

2
Introduction

• British naturalist, explorer, geographer,
  anthropologist and biologist.
• January 8, 1823 November 7, 1913
• Father of biogeography

3
Contributions made to Evolution

• On the Tendency of Varieties to Depart
  Indefinitely From the Original Type
• This essay outlined the mechanics of an
  evolutionary divergence of species from similar
  ones due to environmental pressures.
• Darwinism
• This explained and defended natural selection. In
  it he proposed the hypothesis that when two
  populations of a species had diverged beyond a
  certain point, hybrid offspring would be less fit
  than either parent form, and at that point
  natural selection will tend to eliminate the
  hybrids, contributing to the reproductive
  isolation of the populations. This idea came to
  be known as the Wallace effect.
• The Origin of Human Races and the Antiquity of
  Man Deduced from the Theory of 'Natural
  Selection'
• This applied the theory of natural selection to
  mankind.
• Wallace was the first to propose a "geography" of
  animal species

4
Organisms Studied/ Data Collected

• observation of two distinct zoological regions in
  the Malay Archipelago separated by what came to
  be called Wallace's line
• Studied gliding tree frogs and swampy plants

5
Influences/ Expanding on Existing Ideas

• Charles Darwin
• Robert Chambers
• Charles Lyell
• Joseph Hooker

6
Agree/ Disagree with Scientists

• Agreed with- Charles Darwin, Charles Lyell, James
  Hutton, Thomas Malthus,
• Disagreed with- Jean Lamarck