ecology hw 2

ecology hw 2 - Megan Earney Homework 2 PCB3043-1 T. Miller...

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Megan Earney Homework 2 PCB3043-1 T. Miller Homework 2 1. To determine the upper limit of Ligia, we have to look at what is affecting Ligia to occur there. First I looked at the predator and how it affects Ligia and it doesn’t because the Triggerfish, the predator, does not occur in the upper depths, only the lower depths. Then, I looked at the competitor, Gamarus, to see if it affected Ligia or not. So, I looked out at Gamarus and when I did, the number of Ligia at about 0-10 depth did not change. So, I know that Ligia is not affected by competition or predation. There must be some abiotic factors that determines Ligia’s upper limit 2. To determine the lower limit I did the same process as before, but I had to delete one and then the other to see what the affects were. First I looked at the predator, Triggerfish. When I got rid of the Triggerfish, Ligia was able to exist at the lower depths, which results in the competitor staying and having no effect on Ligia. Then, I had to consider if the competitor, Gamarus, had an affect on Ligia’s lower
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This note was uploaded on 11/08/2011 for the course PCB 3043 taught by Professor Thomasmiller during the Fall '11 term at FSU.

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