BIOL202 - Study Guide - Lecture 8 - The Nature of Communities

BIOL202 - Study Guide - Lecture 8 - The Nature of Communities

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LECTURE 8: STUDY GUIDE THE NATURE OF BIOLOGICAL COMMUNITIES When we try to pick out anything by itself, we find it hitched to everything else in the universe. John Muir, 1911 Text reading : Red/Black Campbell (7 th ed), pgs 1159, 1165-1171 Black/Green Campbell (6 th ed), pgs 1174, 1181-1186 Supplemental readings: There are two short readings posted on the course website. Terminology : biological community physiognomy of a community food chain food web primary producer primary consumer = herbivore secondary consumer = carnivore Questions, etc.: 1. According to your text, what is the dominant species in a community? 2. In general, what do we mean when we talk about the relative abundance of different species in a community? Abundance relative to what ? 3. Species richness is easy to calculate. One can also calculate a number that indicates a community’s species diversity . You have not seen or done a calculation of species diversity yet, but you will when you analyze the stream data. For now, though, here’s a question you should be able to answer: What is the basic difference between species richness and species diversity ? Both are measures of biodiversity but they are not quite the same. The difference has to do with whether they incorporate relative abundance. Explain, in general terms, the basic difference in the two measures. It may
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