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Fish 204 > Chapter 5 > Flashcards

Chapter 5 Flashcards

1
Q

How is productivity measured?

A

O2 produced
CO2 consumed
C uptake

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2
Q

Compensation Depth

A

depth where rate of photosynthesis=rate of respiration

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3
Q

Compensation Intensity

A

light intensity where rate of photosynthesis = res

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4
Q

what affects productivity (3 factors)

A

light, nutrients, hydrography

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5
Q

what is the best way to measure productivity?

A

carbon fixing

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6
Q

where are nitrates limited?

A

marine environment

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7
Q

where are phosphates limited?

A

freshwater environment

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8
Q

where are silicates limited?

A

both fw and sw

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9
Q

what is upwelling waters an indicator of?

A

macrocystis beds

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10
Q

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

A

48.5 petagrams

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11
Q

what is oligotrophic waters dominated by?

A

chryosphytes and desmids

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12
Q

what is eutrophic waters dominated by?

A

diatoms, euglenophytes and cyanophytes

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13
Q

productivity vc production

A

measure of rate vs measure of biomass

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14
Q

Primary Productivity

A

Rate of formation of energy rich organic compounds from inorganic.

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15
Q

Name some nutrients

A

Nitrate, nitrite, ammonium, phosphate, silica, iron

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16
Q

Hydrography

A

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

17
Q

Enriched nutrients:

A

filtered (bacteria and organisms removed)

then enrich with nutrients

18
Q

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

A

thin

19
Q

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

A

phytoplankton

20
Q

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

A

there is no relationship

21
Q

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

A

seaweeds can be categorized on the basis of form

22
Q

langmuir convection cells

A

small scale (few meters) water movements

23
Q

what is smaller than nanoplankton?

A

picoplankton

24
Q

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

A

80-90%

25
Q

name four phylums that contain picoplankton species

A

cyanobacteria, chlorophyta, ochrophyta, crytophyta

26
Q

match-mismatch hypothesis:

A

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

27
Q

NPP

A

net primary productivity

28
Q

what is the ocean’s NPP?

A

48.5 petagrams/year

29
Q

what alga dominate Oligotrophic waters?

A

chryosphytes and Desmids

30
Q

what alga dominate Eutrophic waters?

A

diatoms, euglenophytes, cyanophytes

31
Q

what is the relationship between light and nutrients?

A

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

32
Q

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

A

algae are more efficient

33
Q

what ‘big idea things’ limits life for algae?

A

no light, no water mixing

34
Q

what nutrient is limited in the marine environment?

A

nitrates

35
Q

what nutrient is limited in the freshwater environment?

A

phosphates

36
Q

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

A

silicates

37
Q

name the amount of Carbon per meter squared per year for:

Oligotrophic
Mesotrophic
Eutrophic
Hypertrophic

A 
O= less than 100
M= 100-300
E= 300-500
H= more than 500
38
Q

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

A

colder or windier months

Fish 204 (10 decks)

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