Lake Core Investigation, By : Sarah, MaKayla, and Kaitlyn

Question: What is the difference between the types of diatoms between the two different cores?

Findings: Claim: There is different types of diatoms between the two cores except the middle of core one and the top of core two. The diatoms name is Asterionella formasa.

Evidence: The core types for core one are Navicula(top), Fragilaria capucina(bottom), and asterionella formosa(middle). And the core typed for number two are Asterionella formosa(top), Aulacoseira(bottom) and Gyrosigma(middle).

Data:

Lake Core Investigation by James Logan and Derek

Question: What types of diatoms are most common at the top and bottom of the core?
Data:

























Findings:our findings conclude that long skinny diatoms are the most common in the core sample. our evidence is that there were 21 total skinny long diatoms compared to 8 cricular diatoms and 16 short fat.

By: Samantha .h. , Renee.w. , Anna.g. , Jocelyn.m.

Questions: Are there more diatoms in the young or in the old core sample?




Data:


Claim: Yes,there is more in the old part of the core sample then young.



Findings: We did three slides for each young and old. In slide of the young there was eight diatoms we saw. The seconds had seven and in the third from the young we found nine. So for the total of young diatom there was twenty-four. We also made three old core sample slides in the first we found five the seacond slide we found twenty-two and the last slide we found eleven so the total of the older diatoms was thirty-eight

Lake Core Investigation - Jack, Kyle, Craig

Question: What type of Diatoms are on the surface compared to the bottom?
Procedure: We will take sediment from the surface of the long core put it on a slide and examine it. Then we will do the same for the bottom but we will take sediment from the bottom. Then we will make a chart and compare diatoms.

Varibles Measured: Type of Diatoms

Varibles Changed: Surface and bottom of long core.

Controls: We will use the same amount of sediment.

Data:

Claim: We claim that there are more types of diatoms on the top the bottom, although there are some of the same on the top and bottom

Evidence: If you look at the data table the diatoms are the same on some of them like 8(melosiera), 10(aulacoseira), and 11(gyrosigma)

2 further questions: What if we were to take another lake core from another lake and then see what diatoms there are?

What if we were to take samples from the middle of the lake core and add it to the data would there be more of the same?

Diatom Investigation, By Miranda.

My question:
What is the difference between the amount of diatoms at 5in. down and 20in. down?

Variable changed- Depth, 5in. and 20in.
Variable measured- The amount of diatoms.
Controls- Stay the same! By looking through the slides the same way, use the same amount of time looking through each slide (in my case 5 mins). Make each slide the same way everytime, using the same amount of dirt, water, and puting it together the same way.

Proceedure:
1. Use a ruler to measure down 5in.
2. Get a slide ready with dirt from the 5in. mark.
3. Look throughout slide with microscope for 5 mins. in a zig-zag pattern.
4. Write data for that slide in 1st box of chart.
5. Repeat those first 4 steps twice more but write data in its own box on chart.
6. Now measure down to 20in.
7. Make another slide the same way you have been and with the same amount of dirt and water you have been except with dirt from the 20in. mark.
8. Look through slide with micrascope (using same controls)
9. Write data in own box on chart.
10. repeat those 6-9 steps 2 more times but while writing data in its own box on chart.

Data:
With the first three slides from the 5in. mark, I found 5, 11, and 8 diatoms giving me an average of 8 diatoms at 5in.
With the first three slides from the 20in. mark, I found 17, 21, and 13 diatoms giving me an average of 17 diatoms at 20in.

Conclusion:
-There were less diatoms at 5in. than at 20in.
-At 5in. there was an average of 8 diatoms and at 20in. there was an average of 17 diatoms.
-This may be because at the 5in. layer the enviroment was more harsh and so the diatoms had a harder time living.

Further questions:

• What are the types in a core from the shallow part of the lake versus a deep part (using 10 in. down in each)?
• Are there more Melosiera or Syndra in 5in. down or in 20in. down?

Diatom Investigation Rodney, Jared, Stephen, Kaleb

Question: Which diatom out of 5 diatoms(11-15-8-4-1)appear most in a core sample between a 3ft zone and a 2ft zone.



Procedure: 1. Get a slide, a toothpick and a cover slide.2 Get some of the core sample using your toothpick, apply the core sample to your slide.3 Get some water on your slide and smear on core sample.4 put cover slip on the core sample.5 Put core sample in the microscope.6 Record data.



Varible changed: 2ft to 3ft depth.

Varible controls: How long we look, depth, amount of sediment, keep the same view.
Variable measured: Amount of kinds of diatoms from each core sample.

2 ft core sample:Slide 1: 2 elevens, 1 fifteen
Slide 2: 1 four, 2 eights, 1 eleven
Slide 3: 2 ones, 1 eleven

3 ft core sample: Slide 1: 6 elevens
Slide 2: 1 one, 1 four, 1 eight, 7 eleven
Slide 3: 1 four, 1 eight, 9 eleven

Conclusion: Out of the 5 diatome (1,4, 8, 11, 15) 11 had the most appearances overall. All other diatoms were very even in thier combined appearences. Based on our data, there were more diatoms at 3 ft deep then 2 ft deep. But a vast majority of the 3 ft deep diatoms were number elevens. We determined that the layer all types of diatoms (excludin number 11) does not effect their amounts. Number eleven however is the most common diatom, and it seevs the deeper you go, theres more of this diatom. This diatom must have a specifec trait, unique to it alone, that helps them thrive deeper in the ground. The other diatoms don't seem to prefer one layer over another.

2 Further Questions 1) Which core sample zone (2 ft or 3 ft) has the biggest on average gyrosigma (11) diatoms?
2) Can you find more diatoms by placin 5 drops of water on your slide, as opposed to 1 drop of water?

Lake Core Investigation Tyler, Tristan, Kyle, Zach

Question: Can we find the same types of diatoms on the top as we did on the bottem of the lake core?



Procedure

1. Get 6 slides (3 from the top, 3 from the bottem)


2. Look for similar diatoms in the top and bottem slides


3. Record data in a graph

Materials

1. Notebook


2. Pencil/Pen


3. 6 slides with slide covers


4. 3 samples from top of the core


5. 3 samples from the bottem of the core

Variables Measured-types of diatoms

Variable Change-depths

Control-water, depth, amount of sediment on the slide,amount of time looking for diatoms

Data Table

Top of Core

slide diatom type. number of that type

1 5.1 11.1

2 11.11 6.uncountable

3 43.2 11.4

Bottem of Core

slide diatom type. number of that type

1 14.1 16.2 1.1

2 6.7

3 6.2 11.4

conclusion: we found a couple of the same types of diatoms on top and bottom they are diatoms 11 and 6 they were others but not on both levels i will use the first slides of the top and bottom of the core for an example we found diatom number 11 on top and bottom but only on on each there is the diatom gyrosigma which is benthic likes to live in queit open waters same as the cyclotella diatom number 6 but the cyclotella is planktonic diatom most of the others are open and quiet water diatoms such as diatom 4 and 5 which are benthic.

2 further questions

1.if we had a diffrent core from adley would have more or less diatoms at same height?

2.can we find diatom #11 in the middle of the same core?