BINF 511 Lecture 1: BIOL 540
25 Jun 2018
School
Department
Course
Professor
Ecology of Species Invasion (January)
Lecture 1 - January 8th 2018
“Non-native, Non-indigenous, Alien, Exotic” Species
Species introduced to a region outside its natural historical range
Biological Invasion
Spread & establishment (forming a self-sustaining pop) of a species into a
region beyond its natural range (where it evolved)
Process where a species passes a geographic barrier new region
Invasion Process Stages
Invasive Species
Defn 1: Species pop outbreak ecological/economic effects
Can apply to native species
May be invasive in some regions but not in others
Defn 2: Non-native species spreads rapidly (v successful invader)
Invasive is relative (used to compare species)
Most introduced species aren’t invasive
A species may spread at diff rates in diff regions
find more resources at oneclass.com
find more resources at oneclass.com
Why care?
Invaders ecological/socioeconomic impacts
Biodiversity, physical habitat, ecosystem functioning (nutrient/contaminant
cycling, ecosystem services), technological systems, human/animal health
Proportion of Animal Extinctions in which Invasions = Causal Factor
Invasion Ecology
Study of causes/consequences of biological invasions
Examines factors that influence establishment, spread and impacts
Combines community bio, pop bio, evolution, biogeography, epidemiology
Lecture 2 - January 10th
Are invasions a unique form of global change?
Opposing views of human-associated invasions
Modern invasions = nothing new
Magnitude/impacts of human-assisted invasions similar to those in fossil
record
Modern invasions = unprecedented global change
Current mass invasion event is unique in scale/impact
Propositions
find more resources at oneclass.com
find more resources at oneclass.com
Invasions occur at unprecedented rates & spatial scales
Result of human activities
Unique form of global change
Natural Invasions Occur Through:
Create dispersal corridors (glacial retreat, continental drift) bypass
geographic barrier
Remove physiological barrier (ex: thermal barrier shifts w/ time)
Lecture 3 - January 12th
Major differences between natural & human-assisted invasions
Prehistoric mass invasions = episodic & regional
Current invasion phenomenon = global & continuous
Human-assisted dispersal
Over much greater distances than natural dispersal
Involve larger # introduced organisms
Current invasion rates = orders of magnitude more rapid
Species moving faster/farther than ever
HUMAN VECTORS OF DISPERSAL
find more resources at oneclass.com
find more resources at oneclass.com
Document Summary
Species introduced to a region outside its natural historical range. Spread & establishment (forming a self-sustaining pop) of a species into a region beyond its natural range (where it evolved) Process where a species passes a geographic barrier new region. Defn 1: species pop outbreak ecological/economic effects. May be invasive in some regions but not in others. Defn 2: non-native species spreads rapidly (v successful invader) A species may spread at diff rates in diff regions. Biodiversity, physical habitat, ecosystem functioning (nutrient/contaminant cycling, ecosystem services), technological systems, human/animal health. Proportion of animal extinctions in which invasions = causal factor. Examines factors that influence establishment, spread and impacts. Combines community bio, pop bio, evolution, biogeography, epidemiology. Magnitude/impacts of human-assisted invasions similar to those in fossil record. Current mass invasion event is unique in scale/impact. Invasions occur at unprecedented rates & spatial scales. Create dispersal corridors (glacial retreat, continental drift) bypass geographic barrier. Remove physiological barrier (ex: thermal barrier shifts w/ time)
