Diatom Notes

Question 1

Division

Answer 1

Chrysophyta (Golden Algae)

Question 2

Class

Answer 2

Bacillariophyceae

Question 3

Pigmentation

Answer 3

Chlorophyl a, c, e
B carotene
*Fucoxanthin (brown)

Question 4

Characteristics of Golden Algae

Answer 4

Ubiquitous
Found all year round
Described using the cell wall which is made of silica (glass/sand)

Question 5

Diatom Orders

Answer 5

Pennales (pen)

Centrales (circle)

Question 6

One diatom cell

Answer 6

Frustule/composed of 2 halves

Question 7

Girdle

Answer 7

Side view

Question 8

Valve

Answer 8

Surface

Question 9

Epitheca + Hypotheca = frustule

Answer 9

Epitheca (top)

Hypotheca (bottom)

Question 10

Nutrient Cycling

Most important elements essential for life

Answer 10

Carbon
Hydrogen
Nitrogen
Oxygen
Phosphorus
Sulfur

Question 11

Carbon Cycle

Answer 11

Importance- Proteins, enzymes, fats, carbohydrates

Question 12

Phosphorus Cycle:

Sources of PO4 (Phosphate)

Answer 12

Sedimentary Rock
PO4 in nucleic acids (DNA/RNA)
Sewage
Fertilizers
Detergents (not anymore)

Question 13

Eutrophication

Answer 13

Excessive PO4 in a water system (algal bloom) (feeding nutrients into an ecosystem)

Question 14

Eutrophic (Swampy)

Answer 14

Devils Lake
Mud Lake
Besser Pond
Fletcher Flood Waters

Question 15

Mesotrophic (healthiest)

Answer 15

Lake Huron
Lake Michigan
Long Lake
Grand Lake

Question 16

Oligotrophic (few weeds, deep, clear)

Answer 16

Clear Lake
Lake Avalon
Lake Superior

Question 17

Liebigs Law of the Minimum

Answer 17

Essential nutrients in the least amount control the growth rates of plants, animals, and population and communities of organisms (limiting factors)