Ecosystems
Give an example of a biotic factor.
Answer varies. A biotic factor is something that is living or has lived.
A biome can contain many _________________.
Ecosystems
What does an energy pyramid represent?
Prey
What is the difference between a population and a community?
A population = group of individuals of the same species. A community = group of populations
What is an ecosystem?
The interactions between both the biotic and abiotic factors in an area.
What is one thing that characterizes a biome?
Temperature, climate, precipitation, seasons, types of organisms, geographic location, etc.
What percentage of energy is transferred between each trophic level?
10%
What are organisms that cannot make their own food called?
Consumers/heterotrophs.
The largest number of individuals of a population that an ecosystem can support is called:
Carrying capacity
The place where an organism lives is called:
A habitat
Can biomes change over time? Why or why not?
What is always at the bottom of an energy pyramid?
A producer is also called a ____________ because it makes its own food.
Autotroph.
Give an example of a limiting factor.
Depends on answer. A limiting factor is something in the ecosystem that restricts a population's growth.
What is a niche?
An organism's role in its habitat: what it eats, how/when it reproduces, what it uses for shelter, etc
If the climate in a biome were to change dramatically, what could happen to the populations in the biome?
They would die or migrate. Eventually, species could adapt.
What trophic level would an herbivore be part of?
Primary consumer.
What are the organisms that eat producers called?
Herbivores.
DAILY DOUBLE: Algae in Lake Erie grows at an uncontrollable rate during summer months, covering the surface of the lake. How might this affect other populations in the lake?
It decreases fish populations because the algae depletes the oxygen, once it has died and starts to decay.
Biomass is made up mainly of these two key chemicals. Both of them have their own cycles.
Water and carbon.
Which type of biome is the coldest on average and receives the lowest amount of precipitation?
Tundra.
What type of consumer would always be part of the last trophic level in an energy pyramid?
Decomposers.
What trophic level holds the most biomass and energy?
Producers.
Why are deer in Ohio often dying from starvation?
The predator populations are low. Predators are considered a limiting factor, there is nothing to limit the deer population.