energy or whatever ?s
1. How much of the sun's energy is available to and assimilated by plants, and
how is that measured?
Answer: 400-700 wavelengths. It’s measured by photosynthesis.
2. How are gross production, net production, and ecosystem production related?
Answer: they all have to deal with the production of a plant.
3. How are standing crop, turnover rate, and net primary production related?
Answer: to find the turnover rate, you have to divide the standing crop number
by the production number.
4. What types of ecosystems have the highest rates of production, and which
make the biggest contributions to worldwide primary production?
Answer: locally- estuaries, swamps and marshes, tropical rain forest, and temperate
rain forest. Worldwide- open ocean, tropical rain forest, and temperate rain forest.
5. What factors limit the amount of primary production locally and worldwide?
Answer: locally- tundra, Open Ocean, desert scrub, and extreme desert. Worldwidedesert scrub, lakes and streams, tundra, and extreme desert.
6. What is the efficiency with which energy is converted from trophic level to
trophic level?
Answer: the levels that organisms are on: primary producers, primary consumers,
secondary consumers, and so on.
7. What are the differences between assimilation efficiency, net production
efficiency, and ecological efficiency?
Answer: assimilation is the energy that is used to make new cells and is ingestion
minus excretion. Net production refers to growth plus reproduction. Ecological is the
energy available to each trophic level.
8. How do ecosystems differ in the amount of biomass or number of organisms
present at any point in time, and generated over time, at each trophic level?
Answer: first, the biomass is usually higher at the lower part of the pyramid because
the 1st organism only passes on 10% of the biomass, which is less for the 2nd trophic
level. But sometimes the lower trophic level has less biomass than the one above it.
This is cause the rate of the biomass is going fast while then time of it is slow.
9. How much energy is available to humans, and how much do we use?
Answer: 40% and we use it for food, land, and other uses