Question

Of the following, ________ can change local species diversity but not global species diversity.

Answer 1

The complete question is:

Question: Of the following, ________ can change local species diversity but not global species diversity.

a) speciation and immigration

b) immigration and extirpation

c) emigration and extinction

d) extirpation and extinction

e) speciation and extinction

Answer:

b) immigration and extirpation

Explanation:

Global species diversity takes into account the different types of species present in the whole biosphere. Local species diversity is the different types of species present in a specific geographical region. When members of a species migrate from one habitat to another, the local species diversity is changed. New species are added to the new habitat while the same may be removed completely from its original habitat. However, this would not affect the global species diversity.

Similarly, complete removal or loss of a population of a species from habitat is called extirpation and it reduces the local species diversity. However, the population of this species may be present in some other regions of the biosphere. Therefore, the process of extirpation does not affect global species diversity.  

Answer 2

The given question is not complete as it lacks the option that are necessary to answer the question, however the appropriate options are as follows:

~ speciation and immigration

~ immigration and extirpation

~ emigration and extinction

~ extirpation and extinction

~ speciation and extinction

Answer:

The correct answer is -  immigration and extirpation .

Explanation:

Immigration is the migration of the migration of the species to new location that can change the local species diversity by altering the frequency of allele. however the immigration does not changes the global species diversity.

Extirpation is the extinction of the particular species or population on the local level which can lead to local species diversity but not global species diversity as it is extinction on local level not on global level.

Thus, the correct answer is - immigration and extirpation .