Succession & Ecosystem Change
Type of succession that occurs after a wildfire
secondary succession?
Ecosystems with more species are more
stable
Clearing forests for land
deforestation
rees in dense forests grow tall because they compete for
sunlight
Resources that can be replaced quickly
renewable resources
Type of succession that occurs after a wildfire
primary succession?
Loss of one population affects the ecosystem because
organisms depend on each other
Building cities and roads
urbanization
What happens to Daphnia (water fleas) after pollution
population decreases
Resources that take millions of years to form
nonrenewable resources
A stable, long-lasting ecosystem after succession
climax community
Ecosystem with the least sustainability
low biodiversity ecosystem
Harmful substances entering environment
pollution
Why algae decrease affects Daphnia
Why algae decrease affects Daphnia
Protection of natural resources
conservation
Example of succession: forest regrows after a fire
ecological succession
why biodiversity increases stability
more ecological roles / backup species
Removing salt from ocean water
Removing salt from ocean water
What happens to populations after disturbance
change in population size
Using resources so they last long-term
sustainability
Which succession recovers faster and why
secondary succession because soil already exists
What increases ecosystem sustainability the most
What increases ecosystem sustainability the most
Running out of clean water
water scarcity
A lake ecosystem has a stable population of algae and Daphnia. After a pollution event, the algae population suddenly decreases.
A graph shows the Daphnia population sharply dropping after the pollution event and remaining low over time.
What is the BEST explanation for this trend?
Daphnia population decreased because their food source (algae) was reduced
Toxins building up in organisms
bioaccumulation