Stream Fish Diversity. Ecological Principles of Diversity . Principle of Limiting Similarity - There is a limit to the similarity of coexisting competitors; they cannot occupy the exact same niche. Niche Separation / Differentiation -Competitors use different resources to coexist.
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The fish assemblage is structured by:
1. Physical (our focus)
1. Physical (extra)
Other organisms present
Nutrient cyclingHabitat Parameters that Could Influence Species Composition
Note: We are not measuring all factors, so this is not a complete
test of the hypothesis (we can support but not falsify).
H’ = 1.10
H’ = 1.61
Where pi = # of individuals in a category/total # of individuals