3.2 Flashcards
Ecological succession
sequence of community changes
Primary succession
begins in lifeless area without soil that begins to get low growing plants and soil
Seral stages
the stages before a climax community
Secondary succession
existing community cleared but still has base soil
Pioneer species
the first species in an area
Climax community
lots of life and soil
Species Richness
The number of species found in a given area
Species Evenness
the relative distribution of individuals
Genetic Diversity
related to population size
Ecological Diversity
Keystone species
influential ecological role
Invasive Species
non-native species that out competes native species
What is the difference between primary and secondary succession?
Secondary succession starts with soil, primary has nothing
How do keystone species and invasive species affect biodiversity?
invasive species outcompete the native species and dominate, keystone species influence the rest
Melting, receding glaciers
primary
