10.3 Flashcards
What are the benefits of biodiversity?
food, shelter, medicine, indirect services, agriculture
What is species richness?
number of different types of species
What is species evenness?
abundance/proportion of species
greater diversity is ________
greater stability
What are keystone species?
a species on which other species in an ecosystem largely depend
Keystone species exert important regulating effects on ______.
other species
Keystone species ______ diversity in habitat.
increases
Example of keystone species?
beaver is a keystone specie
What are invasive species?
an introduced, nonnative organism that begins to spread or expand
What do invasive species do?
they reduce diversity
Invasive species are ________ species
non-native
Definition of ecological succession
sequence of community changes
What is the Shannon Wiener index?
a popular metric used in ecology
What is the equation for the Shannon Wiener index?
p1 * in(p1)
p1= # of individual species
