Levels of Organization
This level includes individual living things such as a single wolf or cactus.
Organism
Bio
Producers
Ecosystems with more producers and more species recover faster because they have a higher...
Biodiversity
This type of succession begins on bare rock with no soil present.
Primary Succession
The basic unit of life.
Cell
A desert has a high/low biodiversity compared to a rainforest.
These organisms eat producers.
Primary Consumers
Logging or land clearing disrupts food webs by removing these essential organisms.
Producers
Lichens and mosses are the first to establish in primary succession.
Grasses are the first to establish in secondary succession.
This term is...
Pioneer Species
All the rabbits living in one meadow represent this level of organization.
Population
Ecosystems with high biodiversity tend to have this quality, making them more resistant to change.
Stability
How much energy moves from one trophic level to another?
10%
After a natural disaster like a volcanic eruption, local food webs change. Superheated gases destroy trees and leaves, preventing plants from producing food by what process?
Photosynthesis
This type of succession occurs after a fire or a flood.
Secondary Succession
This level includes all living organisms plus nonliving factors such as soil, sunlight, and water.
Ecosystem
Which has the greatest biodiversity?
A. a tank that includes several goldfish
B. a tundra that has many penguins
C. a pine tree in which three groups of birds live
D. A forest with many different typese of plants and animals
D. A forest with many different types of plants and animals
What diagram shows how energy moves through the trophic levels?
Energy Pyramid
Look at the food web posted for you.
If this organism experienced a disruption (decreased in population) the grass would increase and the blue bird would decrease in population.
Grasshopper
Mature forests represent this stable, long-lasting stage of succession. Both primary and secondary succession end with this stage.
Climax Community
A group of interacting species—like grasses, mice, snakes, and hawks—forms this level.
Community
A drought occurs in the savanna, but it retains the same number of species.
A drought occurs in a pond ecosystem, but many species die.
Which is more stable?
The savanna.
If primary consumers have 500J of energy, tertiary consumers would receive how much?
5 J
Look at the food web posted by your teacher.
What would happen if the bobcat population increased?
The deer, squirrel, and prairie dog populations will decrease.
After a fire, shrubs and trees slowly return. The ecosystem becomes more stable as new species establish. This increase in the number and variety of species over time shows how succession is directly linked to greater what?
Biodiversity