The position that an organism occupies within a food chain.
100
What is the formula for production efficiency?
net secondary production / primary production
100
Define the green world hypothesis.
Terrestrial herbivores consume relatively little plant biomass beacuse they are held in check by a variety of factors, including predators, parasites, and disease.
100
Where is nitrogen usually found?
In the atmosphere or as a product of nitrogen fixation.
200
What is the equation for net primary production?
NPP = GPP - R
200
(VISUAL DAILY DOUBLE)
What chemical cycle does the diagram represent?
Phosphorus Cycle
200
What percentage of light will reach a 20 meter water depth?
5-10%
200
Name two places where carbon is stored.
fossil fuels, soil, sediments of aquatic ecosystems, oceans, plant and animal biomass, the atmosphere
300
Decomposers feed off what specific nonliving organic matter?
Detritus
300
True/False
Is energy moving up a food chain considered efficient?
No, it is not efficient.
300
True/False
The depletion of the ozone layer is mostly due to manmade chemicals.
True
300
Condensation, precipitation, and transpiration are aspects of what nutrient cycle?
The water cycle.
400
What percent of light energy do organisms convert into chemical energy?
1%
400
Define trophic efficiency (in your own words).
The percentage of production transferred from one trophic level to the next.
400
True/False
Atmospheric carbon dioxide concentration has steadily decreased in the past century.
False, it has substantially risen.
400
Name two places in biology/molecules where phosphorus plays an important role.
ATP, phospholipids, nucleic acids, etc...
500
In an energy period, where does the energy that is not transferred between trophic levels go?
The energy is dissipated as heat.
500
If an energy pyramid has four trophic levels, what percentage of the initial energy will the quaternary consumer receive?
0.1%
500
The process by which a phytoplankton community which was dominated by diatoms becomes dominated by cyanobacteria is called?
Eutrophication
500
Photosynthesis removes what element from the atmosphere that is eventually used in one of the nutrient cycles?