Ecosystems
- Created by: ashercat
- Created on: 01-05-17 11:29
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- Ecosystems
- definitions
- ecosystem
- group of organisms & all non-living components in habitat, & interactions
- habitat
- place where an organism lives
- community
- all popoulations of all species living & interacting 2gether in a particular place at same time
- niche
- the role an organism has in an ecosystem
- population
- all members same species
- ecosystem
- abiotic vs biotic
- abiotic: sunlight, water availability, mineral ions
- biotic: squirrel, tree, mice, foxes, rabbits, grass
- biotic interactions
- predation
- disease
- competition
- mutualism
- camouflage
- mimcry
- human activity
- climatic e.g. light intensity, temp, location on planet
- edaphic:e.g. pH, texture, soil related
- topographic e.g. altitude, aspect related to shape of land
- biotic interactions
- food webs
- why not over 5-6 trophic levels?
- hard to evolve something capable of predating apex species
- too much energy lost by higher levels
- more complex = more stable bc alternative food sources
- why not over 5-6 trophic levels?
- eco pyramids
- number
- biomass
- energy
- energy budgets
- producer
- GPP = NPP + R
- NPP = GPP - R
- consumer
- GP = NP + R
- trophic eficiencies
- how effective level is at gaining benefit from level below
- light: 99% lost: reflected transmitted, wrong wavelength
- producer
- succession
- primary
- secondary
- definitions
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