The Living World: Biodiversity

Ecosystem A has higher species richness and higher species evenness.

Ecosystem A has higher species richness but lower species evenness.

Ecosystem B has higher species richness and higher species evenness.

Ecosystem B has lower species richness but lower species evenness.

Forest A is likely more resilient to environmental stressors than Forest B.

Forest B has fewer species and less even distribution of individuals than Forest A.

Forest A has a simpler trophic structure and is less resistant to invasive species than Forest B.

Forest B is likely more resilient to environmental stressors than Forest A.

The variety of genes within a single species.

The total number of different species in an ecosystem.

The relative abundance of each species in an ecosystem.

The interactions between different species in an ecosystem.

The number of different species in an ecosystem.

The variety of genes within a species.

The physical appearance of an organism.

The interactions between different species.

Climate regulation

Water purification

Wood for fuel

Pollination

Resistance is the ability to recover from a disturbance, while resilience is the ability to withstand a disturbance.

Resistance is the ability to withstand a disturbance, while resilience is the ability to recover from a disturbance.

Resistance refers to genetic diversity, while resilience refers to species diversity.

Resistance is a measure of ecosystem size, while resilience is a measure of ecosystem health.

Deforestation

Pollution

Volcanic eruption

Urban sprawl

They compete with established species for resources.

They are the first species to colonize a disturbed area and help create soil.

They prevent other species from colonizing the area.

They accelerate the process of secondary succession.

The number of individuals within a single species in an ecosystem.

The variety of life in a particular habitat or ecosystem.

The total biomass of all living organisms in an ecosystem.

The rate at which energy flows through an ecosystem.

Alleles are the physical expressions of genes and do not affect genetic diversity.

More alleles within a population indicate lower genetic diversity.

Alleles are different versions of a gene, and more alleles mean more genetic diversity.

Alleles determine the number of species in an ecosystem.