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Chapter 26 Community Ecology (Concepts (Community (group of species…
Chapter 26 Community Ecology
Concepts
Community
group of species occurring together
Succession
The predictable sequence of community changes
Climax Community
Community that follows a period of disturbance
Restoration
Involves the artificial help of fixing disturbed communities
Habitat Loss/Fragmentation
The altering of a habit either by human or natural interaction
Diversity
Scale
The physical size of the sample area
Follows a species-area relationship curve
Species Abundance
Can be plotted in a distribution
Close to normally distributed
Latitude
#
Can affect species abundance
Predator Prey Interactions
1 Predator, 1 Prey
functional response
feeding rate + handling time
prey dependent
feeding response is related to prey population density
zero growth isocline
population stability
paradox of enrichment
increase in prey could lead to over hunting and killing both species
Harvesting Methods
maximum sustained yield
exist when you harvest as much as the species grows
Fixed quota
Specific number can be harvested
Fixed Effort
Harvesting number is determined by species richness
Predator Selection Among Multiple Prey
Optimal Foraging
#
Study of why herbivores eat the plants they do
Interspecies Competition
Explotation
Limits resource for everyone
Interference
Keeps others from accessing resource
Invasive
Non-Native Competitor
Resource
Any measurable factor that can lead to population growth
Apparent Competition
When two species' population fluctuations are correlated, but not causal to one another
Beneficial Interactions
Mutualism
Benefit for both parties
faciliation
Helping one organism while receiving no benefit
Primary Succession
#
Organism begins life in a new substrate/habitat
Metapopulations in Patchy Environments
Sink Habitat
Place not well suited for growth
Source Habitat
#
Place where a population can grow and exceed normal expectations
Interconnectedness of Species Food Chains and Food Webs
keystone species
Christ is the key stone which upholds the church
Neglecting to honor the keystone is what leads to the ultimate destruction of false prophets and religions
Related by proxy
Can lead to predator selection
Normally a product of
They need each other to exist
