L5

Question 1

Autotrophs

Answer 1

Organisms that produce their own energy

Question 2

Heterotrophs

Answer 2

Organisms that consume energy from other organisms

Question 3

Explain primary production

Answer 3

The process of creating new organic matter from inorganic materials

Question 4

Autochothous inputs

Answer 4

Every produced from within the stream channel

Question 5

Allochothonous

Answer 5

Energy produced outside of the stream channel

Question 6

Autotrophic (p/r)

Answer 6

A reach that produces more oxygen than it consumes

Question 7

Heterotrophic (p/r)

Answer 7

A reach that consumes more oxygen than it produces

Question 8

Biofilm (considered an ecosystem)

Answer 8

Collection of algae, bacteria and more in a polysaccharide matrix produced by microorganisms
(Bacteria use cellular waste products to turn organic into inorganic compounds, which algae can then use)

Question 9

Biofilms = periphyton

Answer 9

• Nutrients
• dom= dissolved organic matter
• light

Question 10

Macro vs. Micro algae

Answer 10

Macro = see with naked eye, micro = not visible

Question 11

Epilithon

Answer 11

Grows on stones +

Question 12

Epixylon

Answer 12

Grows on wood +

Question 13

Epipelon

Answer 13

Grows on sediment -

Question 14

Epipsammon

Answer 14

Grows on sand-

Question 15

Epiphyton

Answer 15

Grows on other plants

Question 16

Factors that positively affect benthic algal distribution

Answer 16

1. Light
2. Nutrients
3. Temp

Question 17

Factors that affect benthic algal distribution negatively

Answer 17

1. Substrate movement
2. Scour
3. Grazing

Question 18

Must limiting factors that affect benthic algal distribution

Answer 18

Light, nutrients, and scour

Question 19

Inorganic phosphorous

Answer 19

Limiting nutrient in temperate environments

Question 20

Increased p=…

Answer 20

Increased periphyton

Question 21

Increased p= change in periphyton species composition

Answer 21

Diatoms to bryophytes

Question 22

Nitrate and ammonia (n)

Answer 22

Limiting nutrient in topical environments

Question 23

Increased N =

Answer 23

Increased diatoms

Question 24

Adherent algae forms

Answer 24

Increase in flow streams

Question 25

Filamentous algae forms

Answer 25

Decrease in flowing streams

Question 26

Ecology

Answer 26

The study of the relationships between living organisms, and between them and their physical environment

Question 27

River continuum concept (rcc)

Answer 27

A proposed relationship between stream size and the shift of attributes of organisms to their communities (niche shifts)