10-29-09 - Biology 330 Class Notes 10/29/09 QUESTIONS TO GO...

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Biology 330 – Class Notes – 10/29/09 QUESTIONS TO GO OVER IN OFFICE HOURS: GO OVER THE QUANTITATIVE PORTIONS OF THIS LECTURE with Professor Ostrofsky. I am not sure how to calculate the similarity index based on the similarity matrix. I am not sure how to rank/order the species using qualitative data and then again (more precisely) with quantitative data. Can we go over how to calculate the similarity index for qualitative and quantitative data? How to plot the species on the gradient precisely? You might tweeze apart two data points so that the data is split into two parts --> what is this called and why do we do it? How do we do it? MAKE SURE YOU UNDERSTAND FULLY THE QUANTIATIVE PARTS OF THIS LECTURE 4 Things to test the definition of communities (Gleason vs. Clements): 1.) Graphic distribution no one won 2.) Dynamic Relations – The idea that species do better together rather than by themselves Gleason a. Calculated the frequency with which we would expect to find species together (a probability) and found that the species were NOT found together b. There is an overwhelming negative interaction c. There are some neutral interactions d. There are some positive relationships, but very few 3.) Similarity/Dissimilarity Gleason a. Clements high degree of similarity of species within stands everything within a community is the same and everything external to that community a lot of things are different b. Gleason there might be greater similarity BETWEEN communities compared to within the similarity c. Dissimilarity within a community could be as much as 56% different.
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10-29-09 - Biology 330 Class Notes 10/29/09 QUESTIONS TO GO...

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