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15 Cards in this Set

  • Front
  • Back
SUCCESSION
the natural changes that an ecosystem goes through as it becomes more established or
mature
ECOLOGISTS
people who study the natural world (nature)
BOTANISTS
people who study the plant life of a region
Cowles believed the "best" ecogolical studies
involved...
observations (watching for change) in the field over time
5 LEVELS of ORGANIZATION of the ENVIRONMENT
(from smallest to largest)
****One Pony Comes Each Birthday
1. Organism
2. Population
3. Community
4. Ecosystem
5. Biosphere
3 CLASSIFICATIONS of ECOSYSTEMS
1. Fresh Water- ponds, lakes, rivers
2. Terrestrial - land
3. Ocean- salty water
3 EXAMPLES of ABIOTIC FACTORS which organisms must fight for in the ENVIRONMENT are:
1. water- abiotic effects the ability of biotic organisms to survive and reproduce
2. sunlight- limits the growth of populations
3. soil- helps determine the types and numbers of organisms able to exist
PRODUCER
organisms that make their own energy
like plants through photosynthesis
CONSUMER
get their energy from eating other organisms, plants or animals
HERBIVORE
an animal that eats plants
CARNIVORE
gets food from killing and eating other animals (meat)
OMNIVORE
an animal or person that eats both meat and plants
SCAVENGER
an organism that mostly eats decaying meat or rotting plants (buzzards)
DECOMPOSER
an organism that breaks down dead plants and animals and turn them into nutrients (bacteria, fungi, and worms)
SYMBIOTIC RELATIONSHIPS
close actions between 2 different species-
MUTUALISM- both species get something
out of it ex. bullhorn acacia tree and ants
COMMENSALISM- one species benefits
and the other is not hurt or helped
ex. cattle and egrets
PARASITISM- 1 species is helped and the other is harmed (hurt) ex. lice and humans