BIOL 2050 Lecture Notes - Lecture 6: 16S Ribosomal Rna, Kelp Forest, Species Richness
20 Apr 2017
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Document Summary
Concept 16. 2 species diversity (richness + eveness) and species composition are important descriptors of community structure: community structure the set of characteristics that shape communities (a blueprint) It is descriptive and explains what the community should look like: species diversity combines species richness and species evenness, species richness the total number of species in a community, species evenness relative abundances of species compared with one another, e. g. These two communities have equal species richness (4 each: community a: one species constitutes 85% of the individuals, the other species each constitute 5%, community b: abundance is equally divided, each species constitutes 25%. It is a larger scale than species diversity. Concept16. 3 communities can be characterized by complex networks of direct and indirect interactions that vary in strength and direction. In a community many species interact forming a network of direct and indirect interactions: direct interactions: between two species (e. g. , competition, predation, facilitation)
