Unit 2 - AOS1 - Community Interactions Flashcards
Community
“Many populations living in the same area
Each organism has its own _____ (community)
Habitat: place where an organism lives
Each species has its own _____ (community)
Niche: the role/needs of a species
Ecosystem
“All the living & non-living in a given area”
Keystone species
“A species with an unusually large eject on the ecosystem”
(e.g. Otters eat sea urchins which eat kelp –> more kelp)
Biome
“Large rea with distinct climate, plant and animal life”
Examples:
- Taiga (warm summer & long, dry winters)
- Deserts
- Tundra (cold, low precipitation)
- Rainforests (greatest diversity, warm)
- Deciduous forests (well defined seasons, nutrient soils)
- Grasslands
Pattern (in terms of Biome)
“Climate determines where life can survive”
Biosphere
“Area of the earth where life can be found”
Pattern (in terms of biosphere)
“Biosphere changes can affect life”
(e.g. more CO2 in atmosphere causes warmer temps)
Competition
Challenge for resources (occurs when resources are limited)
Limiting factors
Factor that limits the growth of a population (habitats, water, territory)
Competitive exclusion principle
“No two species can occupy the same niche in the same habitat at the same time”
Predation
“When an organisms captures and feeds on another organism”
predator: hunter
prey: hunted
Symbiosis
“relationship where two species live closely together”
- mutualism, commensalism, parasitism, amensalism
Mutualism
Both species involved benefit
e.g. clownfish and sea anemonie
