Biodiversity
This occurs when biodiversity is lost.
What is extinction?
Why are indicator species important?
They indicate the health of an ecosystem
introduction of invasive species, hunting, overexploitation, pollution
A climax community is:
Mature community at the end of succession
What damage can removing the keystone species do?
The ecosystem will collapse; other species will suffer
What is an example of a pioneer species
lichens
What would happen to biodiversity if habitat destruction increases?
Biodiversity would decrease
Threatened is getting close to endangered
Endangered needs protection immediately
What effect does clear-cutting (removing all the trees) have on forest succession?
Causes the ecosystem to go into secondary succession
What is secondary succession?
Succession starting with soil; wildfire, hurricane, flood
Wildfire destroys a forest. What will happen to biodiversity over the next 100 years?
Biodiversity will gradually increase through secondary succession as different species move in
Why are Endemic Species mainly on Islands
Geographical Isolation
How does pollution contribute to species extinction?
It harms organisms and disrupts ecosystems
Describe Primary succession starting with volcano eruption
Volcano Eruption ->
Volcano Eruption -> Lichens → grasses → trees → climax community
Higher genetic diversity = higher resilience = quicker recovery after disturbance
True or False
True
Define Pioneer Species
What is habitat loss?
The ecosystem is changed or altered in a way no organism can survive
Which has more species diversity: a field regularly mowed or a forest that has never been cut down.
Forest