* Typically happens do to an accident or coincidence.
* Can lead to speciation.
* Examples of Geographic Isolation are isolation by barrier, isolation by distance, isolation after an event, and isolation by separation.
* Isolation by Barrier: People in Finland develop certain disease because of the lack of genetic materials from other races. They can't get other genetic materials because of the water surrounding them from the rest of the world.
* Isolation by Distance: A group of differentiated bottlenose dolphins become extinct after becoming separated from members of its species.
* Isolation after an Event: An earthquake separates two populations from each other causing each different population to have different genetic makeup to the other. (I don't know if that makes sense.)
* Isolation by Separation: A population of brown-haired people are separated from other populations and don't mix with other hair-colors. This cause a town of homogenous brown-hair color.
Reflection:
In summary, geographic isolation causes speciation by separating the same species where they begin to start adapting to the environment they were put in. Like when Charles Darwin did his finches experiment, he separated the finches in different environments and studied them. Over time the finches adapted to their new environment. At least I think thats what he did. Nothing in this topic really surprised me because it has everything in the title. It's just geographically isolating a population to create speciation. It wasn't something I knew before but we did learn about geography. This subject is kind of easy because of its name. You can apply this outside of biology by helping to create some kind of new species maybe or help track down ancestors of some new organism.
"Examples of Geographic Isolation." Your Dictionary, examples.yourdictionary.com/examples-of-geographic-isolation.html. Accessed 19 May 17.
How long would it take for geographic isolation to really take effect? Also, are there certain environmental f?actors that result in speciation, or it is specifically exclusive to genetic variation
ReplyDeleteIt depends. Sometimes organisms just die out while others take a while to mutate their genes. I guess it would take as long as it takes to create offspring. Things like chemicals dumped by factories could change an organism and the environment around them would most likely change their genes.
DeleteFor your Charles Darwin example, he just studied the finches in the environment. He did not separate them and studied how they adapted, that would take to long. But good information and maybe increase the size of your image so viewers can read it.
ReplyDelete