HUMAN IMPACT & ENVIRONMENTAL CHANGE
Cutting down forests causes this loss of biodiversity.
What is habitat loss?
The first level in a food chain that produces its own food.
What is a producer?
This word means the variety of life in an ecosystem.
What is biodiversity?
A relationship where both organisms benefit.
What is mutualism?
Plants take in this gas from the atmosphere during photosynthesis.
What is carbon dioxide?
This human activity increases carbon dioxide and affects the carbon cycle.
What is burning fossil fuels?
Energy decreases as it moves from one trophic level to the next. This rule is called this.
What is the 10% rule?
This level of biodiversity refers to differences in DNA within a species.
What is genetic diversity?
A relationship where one benefits and the other is harmed.
What is parasitism?
This process returns carbon dioxide to the atmosphere from organisms.
What is respiration?
When a new species enters an ecosystem and harms native species, it is called this.
What is an invasive species?
This level eats both plants and animals.
What is an omnivore?
If biodiversity increases, ecosystem stability usually does this.
What is increases?
Lions hunting zebras is an example of this relationship.
What is predation?
Burning fossil fuels increases this gas in the atmosphere.
What is carbon dioxide?
If biodiversity decreases, ecosystems usually become this.
What is less stable?
If producers decrease, this happens to the rest of the food chain.
What is the food chain becomes unstable / higher levels decrease?
This happens when one species disappears from an ecosystem.
What is extinction?
A relationship where one benefits and the other is not affected.
What is commensalism?
This process changes nitrogen gas into a form plants can use.
What is nitrogen fixation?
Climate change affects ecosystems mainly by changing this.
What is temperature / available resources / habitats?
Removing top predators often causes this to happen to prey populations.
What is overpopulation?
Ecosystems with high biodiversity are better able to do this after a disturbance.
What is recover / remain stable?
Two species competing for the same food source is an example of this.
What is competition?
Too much fertilizer entering water systems causes this harmful event.
What is algal bloom?