Unit 2 Ecology Flashcards
What is Ecology?
- Organisms relationships with each other
- Orgamisms interaction with the environment
Biosphere
The portion of the Earth that supports life
Biotic factors
-Living factors in an organisms environment
ex/: orgamisms, food, competitors, and predators
Abiotic factors
non living factors in an organisms environment
ex/: temp.,air, sunlight, soil, rain
Organism
Living creature/plant/bacteria
Population
Individual organisms of a SINGLE species
Biological Community
A group of interacting populations (Including bacteria)
Ecosystem
A biological community and all abiot factors that affect it
Biome
A large group of ecosystems
Habitat
An area where an organism lives
Nich
An organisms role or position
Competition
2 or more organisms competeing for the same rescource
Predetation
1 organism consuming another
Symbiosis
When 2 or more organisms live together
Commenalism
One benefits, one is neutral
Mutualism
Both organisms benefit
Parasitism
One helped, one is harmed
Autotroph
Capture energy, making it avialible for all members of the food web (Collect energy from the sun)
Heterotroph
Get energy by consuming other organisms
Herbivore
Plant eater
Carnivore
Meat eater
Omnivore
Meat & Plant eater (Humans, Bears)
Detritivore
Dead stuff eaters
Trophic Levels
A step in the food chain/web
Food chain
A simple model showing how energy is transfered through an ecosystem
Food Web
Shows many interconnected food chains
Ecological Pyramids
Shows the reletive amounts of energy, biomass, or numbers of organisms at each trophic level
What percentage of energy is wasted at each step in food chain/web?
90%
What percentage of energy is given to the organism that eats another?
10%
Biomass
The total mass of tliving matter at each trophic level
What is at the bottom of the ecological/energy pyramid?
Primary Producers
What is at the top of the ecological/energy pyramid?
Tercirary Consumers (3-Consumers)
Nutrient
A chemical substance and organism needs to live
Cycles
Essential nutrients are cycled through the ecosystem
Biogeochemical
A cycle involving life, the earth, and chemicals
Watershed
Water collected underground (Groundwater)
Precipitation
Water falling from clouds
Transpiration
Water coming out of plants
Where does phosphorus come from?
Waste
8 steps to Eutrophication
1) Excess phospherous
2) Alge eats waste
3) Algal bloom
4) No sunlight below
5) Plants die
6) Bacteria eat plants
7) Uses up oxygen
8) Fish die