Chapter 56

Question 1

What are the 3 levels of Biodiversity?

Answer 1

Genetic Diversity
Species Diversity
Ecosystem

Question 2

Endagered species vs threatened species

Answer 2

Endangered–> in danger of becoming extinct throughout all or a significant portion ofits range
threatened–> likely to become endangered in the future

Question 3

What are the 4 major threats to Biodiversity

Answer 3

habitat loss
invasive species
overexploitation
climate change

Overexploitation= killing too many of them to rebound

Question 4

What is an extinction vortex

Answer 4

When a small population is vulnerable to inbreeding
and genetic drift, which can draw the population down an
extinction vortex toward smaller and smaller population
size until no individuals survive.
low genetic variation causes it

Question 5

What is minimum viable population

Answer 5

The minimum population size a species needs to survive

Question 6

What is critical load`

Answer 6

amount of added nutrient that can be absorbed by plants without damaging the ecosystem