Download Sympatric speciation

Student Worksheet
Sympatric speciation
Learning objective
You should know the definition of sympatric speciation and by carrying out
the research activity be able to give at least two examples of this type of
evolution.
You should know that there are likely to be behavioural or ecological barriers
in place to prevent gene exchange within a given area. Behavioural barriers ,
such as breeding patterns or rituals, and ecological barriers, such as food
availability, may operate in sympatric speciation. Sympatric speciation is t he
evolution of new species in populations that live in the same geographic area.
Sympatric speciation is where new species evolve from a single species
whilst inhabiting the same geographic region. The areas may overlap or be
within the same boundary.
The above definition raises the question of how speciation can occur within a
population of interbreeding individuals.
Find out what sort of ecological and behavioural barriers lead to speciation
within the same geographical area. Clearly explain what th e selection
pressures are and how this affects the phenotype of the emerging new species.
The medium ground finch, cichlid fish and apple maggot flies of North
America would make a good starting point (eg type ‘ground finch and
sympatric speciation’ into your search engine.
Present your findings in a written report of no more than one page. Labelled
diagrams with accompanying explanations are acceptable.