What's And N Affect The Simpson Index
1. How sensitive is Db to s? To N?
Db is the particular measure of species richness and it decreases when s (the number of different species) decreases. Db decreases when N (the number of individuals) increases.
2. How s and N affect the Simpson Index?
Simpson Index is a measure of diversity which takes into account the number of species present, as well as the relative abundance of each species. In this case, a few rare species (s) with only a few representatives (N) will not affect the diversity.
3. Are the high and low values obtained from this data set for the Menhinick, Simpson and Shannon indices the highest possible for these indices? If not, can you determine the range?
The high and low values obtained from our data set for the Menhinick, Simpson and Shannon are …show more content…
A community dominated by one or two species is considered to be less diverse than one in which several different species have a similar abundance. Adding additional rare species in a community increases the Ds’s measure of diversity and complexity which takes into account the number of species present as well as the relative abundance of each species.
5. What effect does sample size have on H’?
Sample size does not do anything if the diversity is the same. However, if we take a sample size from a very diverse community, the uncertainty as to the content of that sample increases because H’ (Shannon Diversity) measures species richness.
6. How does your J’ value for Community A compare with your J’ value for Community D? Do you agree with the implications of this outcome?
Based on our data, J’ value for Community A with J’ value for Community D is the same because it is only 1. I agree with the implications of this outcome because both communities had the same constant number of species and the evenness which is the proportional abundance of species is the
Db is the particular measure of species richness and it decreases when s (the number of different species) decreases. Db decreases when N (the number of individuals) increases.
2. How s and N affect the Simpson Index?
Simpson Index is a measure of diversity which takes into account the number of species present, as well as the relative abundance of each species. In this case, a few rare species (s) with only a few representatives (N) will not affect the diversity.
3. Are the high and low values obtained from this data set for the Menhinick, Simpson and Shannon indices the highest possible for these indices? If not, can you determine the range?
The high and low values obtained from our data set for the Menhinick, Simpson and Shannon are …show more content…
A community dominated by one or two species is considered to be less diverse than one in which several different species have a similar abundance. Adding additional rare species in a community increases the Ds’s measure of diversity and complexity which takes into account the number of species present as well as the relative abundance of each species.
5. What effect does sample size have on H’?
Sample size does not do anything if the diversity is the same. However, if we take a sample size from a very diverse community, the uncertainty as to the content of that sample increases because H’ (Shannon Diversity) measures species richness.
6. How does your J’ value for Community A compare with your J’ value for Community D? Do you agree with the implications of this outcome?
Based on our data, J’ value for Community A with J’ value for Community D is the same because it is only 1. I agree with the implications of this outcome because both communities had the same constant number of species and the evenness which is the proportional abundance of species is the