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25 Cards in this Set

  • Front
  • Back
What id ecology?
the scientific study of interactions among organisms and between organisms and their environment
What is the biosphere?
the place on the planet where all life exists
-8k into sky and 11k below surface of ocean
What are the levels of organization?
What are a species?
organisms that can be interbred
What are populations?
same species living in the same area
What are communities?
groups of different populations living in the same area
What is an ecosystem?
all living and non-living things in an area
What is a biome?
groups of ecosystems with the same climate and dominant population
What is an ecological pyramid?
a pyramid that shows the realtive amounts of energy and nutrients at each trophic level
What are autotrophs/producers?
organisms that can capture energy from sunlight or chemicals and use that energy to produce food
What are heterotrphs/consumers?
organisms that rely on other organisms for their energy and food supply
What are the three levels of consumers?
primary, secondary, tertiary
What are decomposers?
organisms that break down organic matter for their energy
How much energy is passed on/lost from one trophic level to the next?
10% moves on to each level, 9o% escapes to the earth as heat
How much nutrients move in an ecosystem compared to energy?
100% of the nutrients move on in an ecosystem compared to energy (recycled)
How much toxic substances canbuildup in an ecosystem?
the toxic substances are passed through an ecosystem and accumulate (100% passed)
What is a habitat?
the specific surroundings where an organisms lives
What is a niche?
the role that an organisms plays in the ecosystem
What is competition (for resources)?
when members of the same/different species compete for resources in the same environment
What are two different results of competition?
1. local extinction
2. survival
What is a fundamental niche?
the full potential niche that an organisms would occup under ideal conditions
What is a realized niche?
the actual niche that an organism can occupy when it's competing with something else
What is the Competitive Exclusion Principle?
No 2 species can occupy exactly the same niche at the same time. One species will always out-compete the other species.
Refering to the pond water lab, what does respiration do for the water?
respiration takes away oxygen from the water
Referring to the pond water lab, what does photosynthesis do for the water?
photosynthesis adds oxygen to the water