Chapter 5 Flashcards
How is productivity measured?
O2 produced
CO2 consumed
C uptake
Compensation Depth
depth where rate of photosynthesis=rate of respiration
Compensation Intensity
light intensity where rate of photosynthesis = res
what affects productivity (3 factors)
light, nutrients, hydrography
what is the best way to measure productivity?
carbon fixing
where are nitrates limited?
marine environment
where are phosphates limited?
freshwater environment
where are silicates limited?
both fw and sw
what is upwelling waters an indicator of?
macrocystis beds
what is the ocean’s NPP? (net primary production)
48.5 petagrams
what is oligotrophic waters dominated by?
chryosphytes and desmids
what is eutrophic waters dominated by?
diatoms, euglenophytes and cyanophytes
productivity vc production
measure of rate vs measure of biomass
Primary Productivity
Rate of formation of energy rich organic compounds from inorganic.
Name some nutrients
Nitrate, nitrite, ammonium, phosphate, silica, iron
Hydrography
factors that influence movement of water and MIXING. currents, upwelling, and diffusion
Enriched nutrients:
filtered (bacteria and organisms removed)
then enrich with nutrients
which is more efficient at taking up nutrients: thin or thick seaweeds?
thin
what is more efficient at taking up nutrients, phytoplankton or seaweeds?
phytoplankton
what is the relationship between productivity of a species of algae and the algal phylum to which it belongs?
there is no relationship
what is to be said of the relationship between thallus form and productivity?
seaweeds can be categorized on the basis of form
langmuir convection cells
small scale (few meters) water movements
what is smaller than nanoplankton?
picoplankton
what percentage of the total daily or annual carbon production accounts for picoplankton in oligotrophic oceans and lakes?
80-90%
name four phylums that contain picoplankton species
cyanobacteria, chlorophyta, ochrophyta, crytophyta
match-mismatch hypothesis:
a measure of reproductive success due to how well the phenology of the prey is able to meet the requirements of its predator
NPP
net primary productivity
what is the ocean’s NPP?
48.5 petagrams/year
what alga dominate Oligotrophic waters?
chryosphytes and Desmids
what alga dominate Eutrophic waters?
diatoms, euglenophytes, cyanophytes
what is the relationship between light and nutrients?
light DRIVES productivity, but it is limited by nutrients and mixing abilities of water
If its to be said that globally, terrestrial is more ‘productive’ than oceanic, then what can be said of aquatic?
algae are more efficient
what ‘big idea things’ limits life for algae?
no light, no water mixing
what nutrient is limited in the marine environment?
nitrates
what nutrient is limited in the freshwater environment?
phosphates
what nutrient can be limited in both marine and freshwater environments?
silicates
name the amount of Carbon per meter squared per year for:
Oligotrophic
Mesotrophic
Eutrophic
Hypertrophic
O= less than 100 M= 100-300 E= 300-500 H= more than 500
which type of months would you find the most productivity in the ocean?
colder or windier months
