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I'm a part of the marine biology crew! My group has been studying algae! WOW! We have found that there are three different types of multicellular algaes: Red, Green, and Brown. What we've done is: We went around to three different locations here in Sitka (Indian River, Cascade Creek, and Starrigavin Creek) and took algae samples. Then we examined and identified the algae. We even took some to an expert marine biologist and had him help us identify them. Then we learned how to measure the water flow, and take water temperature to see if it interfered with the algae. And we made hypotheses and questions on the algae then later wrote up lab reports. The lab reports have our questions, hypotheses, steps and procedures, then a conclusion. And we took lots of pictures that you will see on this site! Pretty exciting stuff huh! Our main goal for this session was to go and study Goddard Hot Springs. This took us several tries before we finally made it. But after many attempts we finally did make it and it was great! Afterwards we compared Goddard with the rest of our sites and made a comparison table. Then we made our web pages that is what I'm doing right now. |
There are three different types of algae, and the three different types come from three different places. The green algae is found where there is fresh water and the brown algae is found where there is salt water. When we found the red algae the water temperature was a lot higher so we think that the red algae is found where it is warmer, I also read that somewhere.
Names: Green algae (Chlorophyta).
Brown algae (Phaeophyta).
Red algae (Rhodophyta).
Sorry no pictures here.
This is brown algae on a stump. |
This is green and brown algae that was on a rock in the river. |
Here's more green algae. |
Another rock with green algae. |
Sorry No Pictures Here
These are the two samples that we found in the creek.
A slimy green rock covered in algae. |
Another green rock. |
These are our pictures from Goddard
This is Jake, one of the students in my crew. He's holding a rock with algae on it. |
Here's the rock that Jake is holding, It's covered in green slimy algae. |
This is red algae! WOW! It took us a long time to find. |
Here's some rock weed and red algae. |
My crew took the water flow of our three different sites here in Sitka but at Goddard the streams coming on to the beach were to small to take the flow. I really don't think that the water flow affects the algae anyway. I just think that the water type and temperature affect the types of algae though. The water flow might affect the amount of algae though. Indian River had the fastest water flow it was more than twice as fast as the water flow at Starrigavin. And Cascades water flow was really slow.
Indian River-148.6 cubic meters per min. of water flow
Sarrigavin Creek- 65.78 cubic meters per min. of water flow
Cascade Creek- 17.479 cubic meters per min. of water flow
Question: Is the algae in greater amounts near the river rather than the ocean side?
Hypothesis: I think that the algae would be greater near the mouth of the river because of the fresh water, also the water temperature might have something to do with it, or the way that the water is moving.
Steps/procedures for collecting algae: #1, Go to site where collecting
the algae. #2, Find rocks, logs, whatever with algae.
#3, Scrape the algae and put it in test tubes or sample bags, mark
the sample numbers. #4, Draw a map of the site where collecting the algae
and record sample numbers on the map. #5, Bring back the algae to be examined
and identify the algae.
Results/Data: Five samples were taken from Indian River off of rocks, a log, and a stick. They were green and brown algaes. The green was in fresh water near the river and the brown was in salt water on the ocean side. One sample was green and brown algae it was found where the fresh and salt water were combined.
Cascade Creek Lab Report
Question: Is the algae at Cascade Creek the same as the algae at Indian River? How do they compare?
Hypothesis: I think that the same types of algaes come from the same types of places.
Steps for collecting algae: #1, Find a site, go to site. #2, Find the algae. #3, Draw a site map. #4, Collect algae and put in sample bags, mark sample numbers on samples and on the site map. #5, Bring algae back examine and identify algae.
Results/Data: On our second algae hunt we found four algae samples that were taken off rocks. The green was in fresh water in the creek and the brown was in salt water at the ocean. So it was pretty much the same as Indian River was and my hypothesis was correct.
Starrigavin Creek Lab Report
Question: Is there both green and brown algae at Starrigavin Creek?
Hypothesis: Green algae is in the fresh water and brown algae is in the salt water.
Steps: #1, Find a site. #2, find the algae. #3, Draw a site map. #4, Collect algae and record sample numbers and location on the map. #5, Bring the algae to be examined and identified.
Results/Data: There were both green and brown algae at Starrigavin. The green was in fresh water and the brown was in salt water. I think that it was pretty much the same as the rest of our samples. We haven't found any red algae yet.
Goddard Hot Springs Lab Report
Question: Is the water temperature higher at Goddard? How does the sulfur affect the algae?
Hypothesis: I think that the water temperature and sulfur at Goddard will affect the algae greatly.
Steps/Procedures: #1, Find and go to location. #2, Find the algae. #3, Map the site. #4, Collect samples of algae and put them in sample bags. Write sample numbers and mark there location on the site map. #5, Bring back algae and examine it more than identify the algae.
Results/Data: My crew finally got to Goddard! We were amazed at the difference in the algae! We never found and red algae before and there was lots of it there. We also found green and brown algae but there was way more red than anything else. We think that the higher water temperature was what caused there to be red algae. The green algae was in fresh water and the brown was in salt water just like all the rest of our sites. There was sulfur at Goddard too and that may have affected the algae but were not sure how.
Comparison Table Of Sites For Water Flow, Water Temp, and Algae Type
| Indian River | Cascade Creek | Starrigavin Creek | Goddard Hot Springs | |
| Water Flow | 148.6 cubic meters per min. | 17.479 cubic meters per min. | 65.78 cubic meters per min. | NONE |
| Water Temp. | -2 degrees Celsius | -3.5 degrees Celsius | -2 degrees Celsius | 5 degrees celsius |
| Green Algae | yes | yes | yes | yes |
| Brown Algae | yes | yes | yes | yes |
| Red Algae | no | no | no | yes |
Here is our school photo. |