what is diversity
the comparison of the variety of species in an area
measure of difference among or btwn two or more entities
measured in richness and eveness
How is diversity measured
It is a tool to measure difference in a community
measured in evenness and richness
can you generate a usable def of diversity
Measure of difference or uniqueness within a community
has many diff scales
what is diff between alpha, beta and gamma diversity
alpha- small area, nums of types of species
beta - compare 2 area, num of speci unique to each eocosys
gamma- total num of species in large region
richness vs evenness in terms of diversity
richness - the amt of diff types of species
evenness - the amount of each species
what is bio indicator species
what makes a good one
One that replicates fast and is sensitive to environmental conditions.
easy to find
shouldn’t migrate bc then we can’t see it change
ex hydra, freshwater shimp -good
rat tailed maggot - bad
how is diverstiy linked to bio org or complexity of life
through the different interactions of species. The more diversity there is the more complex it is.
its harder to organize when theres lots of diff species/variation
simpson vs shannon diversity index
simpson - accounts for ruchness and evenness and the prob of 2 samples being from diff species
Shannon-just richness and evenness, has a log
What do high, low values of simpson’s index mean
high - (high richness, high even) healthy, diverse, niches filled, low competition
low - low richness, even, few potential niches, only few species thrive