Biodiversity
What group of organisms is at the base of every energy pyramid?
producers/autotrophs
Which has more biodiversity a forest or a corn field?
forest
Name two species indigenous to Africa.
zebra, giraffe, lion, etc
What type of organisms are usually at the second trophic level of an energy pyramid?
Herbivores/primary consumers
How does biodiversity relate to ecosystem stability?
More biodiversity=greater stability
low biodiversity= less stability
Outcompete native species, are predators of native species, etc.
What do you call an organism that can produce it's own energy from a primary energy source.
A producer or autotroph
What is at the top of the energy pyramid?
If an organism is removed from a food web then the ecosystem will always collapse. True or False? Explain.
False. If the ecosystem is very biodiverse it may be stable enough.
Give an example of an invasive species?
many answers
What is the primary energy source for most food chains?
The sun
Only ten percent of energy is transferred as you go up a trophic level in an Energy pyramid. How is 90% of the energy lost?
Heat and waste
Why is biodiversity so important?
Because all survival depends on a variety of living things so that when disease, invaders and natural life cycles kill species, enough are left for food and resources
How can you prevent invasive species from damaging ecosystems?
Do not allow exotic plants and animals to come into the ecosystem. Regulations on the movement of species from one country to another, educate the public about having exotic species as pets, etc.
What is the other primary energy source found at deep sea vents that non-photosynthesizing autotrophs use to make their own energy?
chemicals
Name one way ecologists can quantify the amount of energy at each level of an energy pyramid?
biomass and number of individuals in the population