Chthamalus Barnacle Case Study

Exercise 1:

[ 3.1 ] Which barnacle species ranges into the warmest water? 

The barnacle species that ranges into the warmest waters is the Chthamalus barnacle. They tend to range farther in southern waters compared to the Semibalanus
[4.1] On average, how many high and low tides will a given spot on the coast experience in a day, and why?
On average a given spot will experience two high tide and two low tides in a day. The tides are experienced due to the moon gravitational pull. The low tides are experienced when we are facing 90 and 180 degrees away from the moon. Then the high tides are found when we are facing the moon and when we are facing away from the moon. [4.2]What is a spring tide and when does it occur?
Spring tides occur

From day 10 to day 14 the chthamalus barnacle did have a significant increase as I previously thought but only decreased for one of the trials.
[8.2] Were your expectations from Question 6.1 met? Explain, using numerical results.
My predictions for 6.1 were almost exactly what I expected except for one area. I thought that I would have saw an increase for the Chthamalus barnacles on day 2 there were 4 and then on day 14 there were 13. The part that did not met my expectations was I did not see a small decrease in the number of both species towards the end. Only on the first the sample on day 12 t day 4 saw a small decease of 1 individual of each species. But for the second trial there was an increase for each of the species of barnacles fro day 12 to 14. The Chthamalus saw a large increase from 18 to 23. The Semibalanus Saw an increase of 3 to 5.

[8.3] In what ways do you think your results would have been different if you had sampled at a different height on the rock?

The Chthamalus branacles fell off of the rack face and the Semibalanus rock became much more plentiful in that area of the rock.

[ 8.2 ] Did you predict correctly? Explain.
Yes my prediction was correct this is because the Semibalanus barnacle species overgrew and killed off the Chthamalus barnacle species becoming less abundant. The Semibalanus barnacles that were transplanted became more abundant. [ 9.1 ] Based on your hypothesis, if you cleared an area in the center of the rock face, do you predict that Semibalanus will settle in the new open space (i.e., will any land and attach to the rock in that space)? Why or why not?
I believe that the Semibalanus will inhabit the open area of the rock and out compete the Chthamalus for the open area. I think this because the Semibalanus species seems to be the better competitor of the two.

[ 9.2 ] Based on your hypothesis, if any Semibalanus do settle in the new open space, do you predict that they would persist there (i.e., stick around for a while)?