Urban Ecology Urban Habitats

Front 1

Urban environments

Back 1

Create unique habitats, or hyperdynamic, fragmented, diverse, sharp edges

Front 2

Urban biological communities

Back 2

Can be unique even novel, are often stress, composed of unique combinations of native and non-native species

Front 3

Habitat grain

Back 3

Coarse grain, low diversity habitat. Fine grain, High diversity habitat.

Front 4

Island biogeography

Back 4

Habitat patches equal Islands. Biodiversity is a balance of immigration and Extinction. Urban habitat often arrayed as Islands

Front 5

Extinction debt

Back 5

Extinction that equals actual Persistence of species versus predicted persistence species area curve. Highest in type 3 cities type 2 is closer to predicted there for Less debt. Type 1 excluded because the lack of pre-settlement survey species remaining maybe preadapted to altered conditions

Front 6

Tape three cities

Back 6

Extinctions may continue to equilibrium had high Extinction debt

Front 7

Metapopulations

Back 7

A collection of populations that have regular or intermittent gene flow between geographical be separate units

Front 8

Sources and sink populations

Back 8

Urban species can be maintained by rural Source populations, temporary species, my grits, population in one way think Forest Park as a source and Laurelhurst Park as a sink