ENVS469 Lecture Notes - Lecture 4: Metapopulation, New Urbanism, Landscape Urbanism
25 Feb 2020
School
Department
Course
Professor
Document Summary
Week 4 part ii urban & natural environments. Why are metapop"ns important: many pop"ns in natural systems exist in metapop"ns, human action has transformed many pop"ns into metapop"ns. Colonization: unoccupied patches can be colonized (dispersal ability!, likelihood of colonization related to distance and patch quality. Importance colony/satellite patches: satellites add to persistence, cannot persist w/out colonies , effect of stochasticity: increased stochasticity decreasing persistence. Urban green spaces can act as satellite sites; have potential to be incredibly valuable for maintaining a metapopulation metapopulation persistence. Example: shrews in backyard and park ecology. 26% of all gardens, but 43% of connected gardens & only 6% of unconnected gardens. Spatial configuration (distance to corridor, type of barrier degree of obstacle: built structures as strong barriers (e. g. , small road vs. hwy) Two main types of urban growth: sprawl and densification. Concern with these types of growth: lack of connectedness with nature extinction of experience .
