03 Pyramids Flashcards
The chemical process where sunlight is used to combine carbon dioxide and water to form glucose and oxygen is called ________
photosynthesis
That chemical that is produced through photosynthesis and which provides energy for the ecosystem is______
glucose
There is less energy available to a _______ consumer than there is to a _______ consumer.
secondary, primary
If an animals eats 5000 J of energy, the amount of energy that is stored in its body is _____
500J
In general, the percentage of energy lost as one moves up from one trophic level to the next is ______
90%
hat diagram that shows the amount of energy that is lost and transferred from one trophic level to the next is called a _____________ __ _________
Pyramid of energy
That way of showing how many organisms there are as you move up the trophic levels is called the _____ __ ______
pyramid of numbers
In general, as you move up the trophic levels, the number of organisms at each level _______
decreases
in a forest ecosystem where trees can support a large amount of insects, the trophic level that is the widest is the _____ trophic level where we find _______ consumers.
second, primary
That type of pyramid that shows how the dry mass of living things changes as you move up the trophic levels is called the ___________
pyramid of biomass
As a general rule, of the mass of producers is 100 kg, then the mass of herbivores that can be supported is_____
10kg
Plants use the chemical energy they produce for two main purposes. What are they?
Plants use this chemical energy to keep the cells working and to grow.
When animals consume plants, they use the plant energy in several ways. What do animals use this energy for?
Most of the chemical energy is used to moves its limbs, to pump blood, keep the body warm, to feed its young, and to manufacture the chemicals it needs to keep the cells and organs in its body working.
Suppose there is 90 000 kJ of energy stored in grasses. If we move to the fourth trophic level where owls may be found, how ideally how much energy would we expect to find stored there?
90Kj
Suppose that the mass of producers is 2000 kg for both a terrestrial ecosystem and an aquatic system.
a) What mass of primary consumers would each be able to sustain in the ideal case?
In a terrestrial ecosystem, the mass of primary consumers would be only 10% of the producers, 10% of 2000 kg which is 200 kg. For an aquatic system the mass would be more than 2000 kg, perhaps 20,000 kg.
