Chapter 4 Species Interactions and Community Ecology Flashcards
Competition
Organisms seek same limited resource. Intra or interspecific competition
Competitive Exclusion
Complete dominance of species over another, removal
Fundamental Vs Realized Niche
Fundamental is what they would, realized is w/comp
Resource Partitioning
Species divide resources by specializing in different ways
Predation
One species hunts other, drives evolution for both
Parasitism
One organism depends on host for nourishment while harming host.
Coevolution
Two species responding to the other’s adaptations
Herbivores
Plants only
Mutualism
Two or more species benefit from interacting
Symbiosis
Physically close association
Pollination
Encounter only once
Autotrophs
Self feeding, first trophic level
Primary consumers
Eat produces, second level, usually herbivore
Secondary consumers
Eat primary, third level
Tertiary
Feed at higher trophic levels
Detritivores and decomposers
Scavenge; eat dead and recycle
Keystone species
Species with strong/wide reaching impacts far out of proportion of its abundance
Resistance
Able to withstand distrubance/recover from it, resist change
Resilience
Changes in response to disturbance
Primary succession
Biotic community built from scratch
Secondary succession
Some left over, a building block
Pioneer species
Arrive first and colonize new substrates. Lichens
Climax community
Succession over, new habitat that replaces it
Biome
Regional complex of similar communities. recognized by dominant plant type and vegetation structure. Which 10 are there?
