spongebob
What is an invasive species?
A non-native species (usually introduced by humans) that is causing harm to native species and/or disrupting the ecosystem
What are the 2 types of extinction?
Background extinction
Mass extinction
Species diversity is a measure of...
Species richness and species evenness
What is a species' range?
Geographic distribution (determined by biotic and abiotic factors)
What are the threats to biodiversity that we discussed in class? (5 things)
Habitat fragmentation + destruction
Overexploitation
Invasive species
Pollution
Climate change
What are the causes of background extinction?
Normal environmental change
Disease
Predation
Competition
What is a realized niche?
The resources used by a species in the presence of species interactions e.g., competition
What could cause a uniform spatial pattern?
Negative social interactions between individuals (e.g., territoriality)
What are the consequences of habitat fragmentation and destruction?
Simplification
Increased edges
Fewer safe corridors
Less gene flow
Provide examples of density-dependent factors that limit population size
Competition for limited resources
Disease
Predation
What are the types of mimicry?
Mullerian = dangerous species resemble each other
How is population growth calculated?
r = (birth rate + immigration) - (death rate + emigration)
What can be done to protect and conserve biodiversity?
Education
Genetic restoration
Seed banks
Management plans for invasive species and endangered species
What is generation time?
Age to reproductive maturity
Average time between the birth of an individual and the birth of its offspring
What is resource partitioning?
Species respond to competition by changing how they use the limited resource
What is a metapopulation?
A population of populations connected by migration (e.g., islands)