unit 1 part 3 (1.1.8-1.1.10 Flashcards
what is primary productivity
rate that solar energy is converted into organic compounds via photosynthesis
rate of photosynthesis of all producers in an area over a given period of time
occurs over specific unit of time
can also be thought of as amt of plant growth over time
T or F: ecosystems with high PP are usually less biodiverse
false; they are usually more biodiverse
Define Gross Primary Productivity
total amount of sun energy (light) that plants capture and convert to energy (glucose) through photosynthesis
The total rate of photosynthesis in a given area
What is net primary productivity
The amount of energy (biomass) leftover for consumers after plants have used some for respiration
What is biomass
total mass of organisms in a given area
What factors lead to high biodiversity
Water availability, higher temperature, and nutrient availability
What is respiration loss
when plants use up some of the energy they generate via photosynthesis by cellular respiration
1st law of thermodynamics
energy is never created or destroyed
T or F: Food webs demonstrate conservation of energy
True
2nd law of thermodynamics
each time energy is transferred, some of it is lost as heat
applied to food webs, the amt of useable energy lowers as you move up
10% rule
in trophic pyramids, only about 10% of energy makes it to the next level
the other 90% is used by organism and lost as heat
Does the 10% rule apply to biomass?
Yes; Since energy is needed for growth & only 10% of energy transfers from one level to the next, only 10% of the biomass can be grown/supported
biomass is the mass of all living things at each trophic level
Trophic cascade
removal or addition of one trophic level affects the next
removal or addition of top predator has ripple effect
What is a likely change to terrestrial biomes resulting from warmer average global temperatures?
The global distribution of midlatitude biomes, such as grasslands and temperate rain forests, would increase.
What rate of reaction can be measured in the dark by determining the amount of oxygen gas consumed in a period of time?
cellular respiration
because it doesnt require sunlight unlike any of the pps!
