Chapter 5

Question 1

How is productivity measured?

Answer 1

O2 produced
CO2 consumed
C uptake

Question 2

Compensation Depth

Answer 2

depth where rate of photosynthesis=rate of respiration

Question 3

Compensation Intensity

Answer 3

light intensity where rate of photosynthesis = res

Question 4

what affects productivity (3 factors)

Answer 4

light, nutrients, hydrography

Question 5

what is the best way to measure productivity?

Answer 5

carbon fixing

Question 6

where are nitrates limited?

Answer 6

marine environment

Question 7

where are phosphates limited?

Answer 7

freshwater environment

Question 8

where are silicates limited?

Answer 8

both fw and sw

Question 9

what is upwelling waters an indicator of?

Answer 9

macrocystis beds

Question 10

what is the ocean’s NPP? (net primary production)

Answer 10

48.5 petagrams

Question 11

what is oligotrophic waters dominated by?

Answer 11

chryosphytes and desmids

Question 12

what is eutrophic waters dominated by?

Answer 12

diatoms, euglenophytes and cyanophytes

Question 13

productivity vc production

Answer 13

measure of rate vs measure of biomass

Question 14

Primary Productivity

Answer 14

Rate of formation of energy rich organic compounds from inorganic.

Question 15

Name some nutrients

Answer 15

Nitrate, nitrite, ammonium, phosphate, silica, iron

Question 16

Hydrography

Answer 16

factors that influence movement of water and MIXING. currents, upwelling, and diffusion

Question 17

Enriched nutrients:

Answer 17

filtered (bacteria and organisms removed)

then enrich with nutrients

Question 18

which is more efficient at taking up nutrients: thin or thick seaweeds?

Answer 18

thin

Question 19

what is more efficient at taking up nutrients, phytoplankton or seaweeds?

Answer 19

phytoplankton

Question 20

what is the relationship between productivity of a species of algae and the algal phylum to which it belongs?

Answer 20

there is no relationship

Question 21

what is to be said of the relationship between thallus form and productivity?

Answer 21

seaweeds can be categorized on the basis of form

Question 22

langmuir convection cells

Answer 22

small scale (few meters) water movements

Question 23

what is smaller than nanoplankton?

Answer 23

picoplankton

Question 24

what percentage of the total daily or annual carbon production accounts for picoplankton in oligotrophic oceans and lakes?

Answer 24

80-90%

Question 25

name four phylums that contain picoplankton species

Answer 25

cyanobacteria, chlorophyta, ochrophyta, crytophyta

Question 26

match-mismatch hypothesis:

Answer 26

a measure of reproductive success due to how well the phenology of the prey is able to meet the requirements of its predator

Question 27

NPP

Answer 27

net primary productivity

Question 28

what is the ocean's NPP?

Answer 28

48.5 petagrams/year

Question 29

what alga dominate Oligotrophic waters?

Answer 29

chryosphytes and Desmids

Question 30

what alga dominate Eutrophic waters?

Answer 30

diatoms, euglenophytes, cyanophytes

Question 31

what is the relationship between light and nutrients?

Answer 31

light DRIVES productivity, but it is limited by nutrients and mixing abilities of water

Question 32

If its to be said that globally, terrestrial is more 'productive' than oceanic, then what can be said of aquatic?

Answer 32

algae are more efficient

Question 33

what 'big idea things' limits life for algae?

Answer 33

no light, no water mixing

Question 34

what nutrient is limited in the marine environment?

Answer 34

nitrates

Question 35

what nutrient is limited in the freshwater environment?

Answer 35

phosphates

Question 36

what nutrient can be limited in both marine and freshwater environments?

Answer 36

silicates

Question 37

name the amount of Carbon per meter squared per year for: Oligotrophic Mesotrophic Eutrophic Hypertrophic

Answer 37

``` O= less than 100 M= 100-300 E= 300-500 H= more than 500 ```

Question 38

which type of months would you find the most productivity in the ocean?

Answer 38

colder or windier months