1. Ch. 21.2 Community Ecology pp.403-405
Species richness = count of the different species populations found in a community
Species diversity = balance of those different species
Combination of how many different species, and how many individuals in each population of species
Ch Community Ecology pp
What are the numbers in the community?

2. Ch. 21.2 Community Ecology pp.403-405
What is the richness and diversity of communities 1 and 2?
Ch Community Ecology pp

3. Ch. 21.2 Community Ecology pp.403-405
What is the richness and diversity of communities 1 and 2? Species Richness of 1 = 4 Species Richness of 2 = 4
Ch Community Ecology pp

4. Ch. 21.2 Community Ecology pp.403-405
What is the richness and diversity of communities 1 and 2? Species Diversity of 1 is good or high. Species Diversity of 2 is poor or low.
Ch Community Ecology pp

5. Ch. 21.2 Community Ecology pp.403-405
Species-Area Effect = on average larger areas have more species present

6. Ch. 21.2 Community Ecology pp.403-405
Species Interactions:
Increased species richness often helps to stabilize the community:
A balance is established among the organisms
No one organism becomes dominant
Predators can control prey organisms that might otherwise out-compete the other prey organisms
how wolves change rivers
Ch Community Ecology pp