Use the class results from the Island Biogeography lab (graphed below) to answer
ID: 176788 • Letter: U
Question
Use the class results from the Island Biogeography lab (graphed below) to answer the following question. How does the rate of immigration of new species change as species accumulate on an island? Why would the number of species already on an island affect the rate at which new species successfully establish? How does the rate of extinction change as species accumulate on an island? If the island were much larger than the one in the figure, would this primarily affect the extinction or immigration rate? Draw a new line on the figure above indicating the change you would expect to see in extinction and/or immigration rates on a large island and label it. If the island were much further from a continent than the one in the figure, would this primarily affect the extinction or immigration rate? Draw a new line on the figure above indicating the change you would expect to see in extinction and/or immigration rates on a distant island and label it.Explanation / Answer
Answer a) As new species accumulate that is rate of immigration increase the rate of extinction is also increasing. its due to the fact that as new and new species accumulate its lead to larger rate of competition and which leads to elimination of unfit species.
Answer b) Number of species already on an island affect the rate at which new species get established is already is clear from the above fact, number of species affect various factors like competition for the same food which deffenetely affects the rate of successful establishment of new species.
Answer c)Rate of extinction increase as new species accumulate on an island, due to more competition because of the food habbit of the species which leads to elimination of weaker species which are not able to compete with the other superior species which ultimately leads to extinction of the weaker species.
Answer d)If the island is much larger then the above island then there is more time available for the species to adapt and more resources available, so the slope of the graph will dicrease.
the graph above will be shifting towards right side, that is the point of contact of both lines will shift towards right hand side.
e)Both the extintion and immigration rate will dicrease as there is very less chance of immigration and thus rate of extinction should also be low, but if migration happened than offcourse it will affect rate of extinction
the graph will shift towards left side that is the point of contact will shift towards right hand side .
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