BIOL208 Lecture Notes - Lecture 26: Log-Normal Distribution, Species Evenness, Species Richness
20 Sep 2016
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Document Summary
Communities are defined areas where a bunch of different species interact. The number of species in a community and their relative abundance. The kinds of species (guilds or functional groups) Guilds or functional groups: the idea of organisms that do similar things in an ecosystem. A functional group can be closely related (bumblebees), or they can be very disparately related (c4 plants) Role of the organism, but it may not be the origin. Dominance is the most abundant species in a community. Some that are very rare, some that are very common, and lots of individuals that fall in the moderately rare or moderately common area (in the middle) It"s really common, whatever community we are measuring we find this lognormal distribution. Two factors: species richness (# of species), and species evenness (abundance of species) Community a low species evenness, has a dominant tree.
