M2-1

Question 1

Water quality

Answer 1

The chemical, physical, and biological characteristics of water . Lvl of quality is often based on the use of water

Question 2

5 physical indicators

Answer 2

1) total dissolved solids
2) conductivity
3) total suspended solids
4) turbidity
5) water colour

Question 3

7 chemical indicators

Answer 3

1) pH
2) boi oxygen demand (BOD$)
3) DO
4) hardness
5) TN
6) TP
7) heavy metals and pesticides (toxic materials)

Question 4

5 biol indicators or water quality

Answer 4

1) bacteria content
2) EPT count (classes that are sensitive)
3) community comp
4) diversity index
5) dominance of pollution tolerant organisms

Question 5

What control primary production

Answer 5

Nutrients

Question 6

What is a key way to understand biological processes?

Answer 6

Understand nutrient cycles

Question 7

dissolved vs particulate matter

Answer 7

often an arbitrary distinction. Dissolved matter can pass through a filter, while particulate cannot.
often the cutoff for dissolved is between 0.5 to 1 microm

Question 8

total dissolved solids

Answer 8

determined using mass that is dissolved in water (2microm trheshold)

Question 9

what is the range of TDS in tap water

Answer 9

170-410

Question 10

conductivity

Answer 10

the electricity is transferred through water via ions.
note specific conductance is correct to 25 degrees

Question 11

TSS

Answer 11

the mass of particles retained on a filter

Question 12

turbidity

Answer 12

determined via the amount of light scatter or absorbed. more parties haas more scattering (cloudy)

Question 13

what is the range of conductivity for tap water

Answer 13

50-800 mS/cm

Question 14

pH meaning

Answer 14

potential of hydrogen- a measurement of acidity

Question 15

what does pH dictate

Answer 15

• biological activity in a water system
  - most biol sys like pH=7

Question 16

what is the risk of a low pH system?

Answer 16

the mobilization of toxic metals

Question 17

Alkalinity

Answer 17

the buffering capacity of water (neutralize acids)
- measure in mg/l of equivalent carbonates
often varies with geology and rock sources

Question 18

hardness

Answer 18

the sum of mg and ca ions in the water. this acts and an indicator for the ability for water to precipitate soap.
an important factor in the domestic water supply.

Question 19

biogeochemistry

Answer 19

chemistry in an environmental context w/ emphasis on the living and non living components of an ecosys

Question 20

nutrients

Answer 20

elements that are essential for plant growth

Question 21

where is phos are incorporated into

Answer 21

used in: lipids, nucleotides and nuc acids

Question 22

sources of nutrients

Answer 22

through precip, weathering/errosion, water, mirco orgs (inot bio avaiable formes), decomp of larger orgs

Question 23

macro nutrients

Answer 23

N, P, O, C, (and K)

Question 24

micronutrients

Answer 24

Fe, Cl, Cu, Mn, Zn, Mo Bo

Question 25

nutrient use by primary vs heterotophs

Answer 25

primary can use nut in an inorg form (like nitrite and phosphate) while hetero much aquire in the org form

Question 26

where is nitrogen incorporated into

Answer 26

AA and proteins, along with nucleotides and nuc Acid

Question 27

stoich

Answer 27

the balance of energy and elements- how they impact living systems

Question 28

redfeild ratio

Answer 28

106 C: 16 N: 1 P (phos is often limiting if these ratios hold)
this ratio promotes the balanced growth of organisms

Question 29

nutrient assimiliation

Answer 29

the acquisition of nutrients by orgs. often incorperated into biomass

Question 30

remineralization

Answer 30

the breakdown or OM into biologically available forms.
a form a recycling often completes nutrient cycles

Question 31

leibig;s law of minimum

Answer 31

the element or resource with the least relative amount will limit growth and production.
the idea that a single nut will limit the primary prod of a system

Question 32

common limiting nutrients

Answer 32

N and P