A population that becomes divided (isolated) by a physical barrier, allowing each of the separated groups an independent evolutionary path.
1. When new species form.2. When a group is separated from the rest of its species.3. When members of the isolated group can no longer mate with the rest of species.
Geographic isolation Low geneflow.
it prevents gene flow between populations
A geographic barrier eg mountain range, river, ocean, desert, can split a species into two populations which can no longer mix with each other. By splitting up a species into two separate populations a geographic barrier can lead to the formation of a new species. The two separate populations start to develop in isolation from each other. Different mutations will occur in the two populations and natural selection will adapt them to the slightly different conditions in the two areas. Given enough time the two populations will become so different that if they are brought together again they will no longer be able to interbreed ie they will have become two different species. This is called allopatric speciation.
Geographic isolation is when a population is separated by a river/canyon or some impassable terrain. Habitat isolation is when members of a population live in a different type of habitat, say some live in the forest at the bottom of the mountain, while others live further up the mountain. These would then become different populations and evolve to perhaps form two different species.
The geographic isolation of the island led to the development of unique species found nowhere else in the world.
Reproductive isolation
cultural traditions and practices, and can lead to the development of unique languages and belief systems within that population. Additionally, isolation may also contribute to genetic diversity or specific adaptations that help the group survive in their environment.
Geographic isolation.
Geographic isolation.
geographic isolation.
development of trade
1. When new species form.2. When a group is separated from the rest of its species.3. When members of the isolated group can no longer mate with the rest of species.
It can be by geological means (i.e. earthquakes, floods, mountains and other other geographic barriers) or population dispersal. It can also be caused by human activity that splits a population, causing geographic isolation.
Geographic Isolation
Isolation
allopatric separation