Speciation Lecture - What is a species Species = kind or type in Latin 1 Typological species = each kind of organism is fixed and immutable and can be

Speciation Lecture - What is a species Species = kind or...

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What is a species? 1. Typological species == each kind of organism is fixed and immutable and can be represented by an ideal individual, the type specimen (Linnaean Nomenclature) 2. Biological definition of species == Reproductively isolated group of actually interbreeding natural populations that produce fertile offspring
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Biological species = reproductively isolated populations Sympatric species = ranges overlap Allopatric species = ranges don’t overlap How can we test if two populations are 2 species? Easy Hard Biological species definition used 10% of the time Morphological & chem. differences used 90% of the time.
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Problems in identifying species: Polymorphic species = species with many different types of individuals
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Problems in identifying species: 2. Sibling species = virtually identical species
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Problems in identifying species: 3. Ring Species = continuous gradual shift in phenotype over a large range.
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  • Fall '14
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  • Evolution, biological species, Spartina townsendii

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