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bio 1500 lab 13 quiz
N/A
22
Biology
Not Applicable
11/18/2009

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Term
Community
Definition
All populations inhabiting a particular area
Term
Ecosystem
Definition
All the living organisms and nonliving things of a particular environment
Term
Decomposer ecosystem
Definition
fallen leaves, dead grass, sticks, first few cm of soil
Term
Biodiversity
Definition
(aka biological diversity) the variety of the living things on Earth
Term
Abiotic
Definition
NON-living things in the environment
Term
Biotic
Definition
"pertaining to the living organisms of the environment"
Term
What is a trophic level?
Definition
Determines an organisms position in a food chain (<---this is their trophic level) Ex. 1)primary producers, 2)primary consumers, 3)secondary consumers, 4)Tertiary consumers, and 5)Quaternary consumers.
Term
Detritus
Definition
Dead organic matter
Term
Dentritovore
Definition
"a consumer that derives its energy from nonliving organic material"
Term
Primary producer
Definition
Autotrophic, usually photosynthetic organisms; trophic level that supports all other levels.
Term
Herbivore
Definition
An animal that eats plants
Term
Carnivore
Definition
An animal that eats other animals
Term
Saprobe
Definition
An organism that consumes the remains of dead organisms
Term
Trophic Efficiency
Definition
The amount of energy transferred from one trophic level to the next.
Term
Trophic Efficiency (energy) #2
Definition
the amount of energy at each trophic level limits the amount of energy at the next trophic level.
Term
Human Trophic Efficiency
Definition
Humans can be primary consumers or secondary consumers, Ex. primary- humans eat corn, 2ndary- humans eat steak(the steak is from the primary consumer that ate from the primary producer)
Term
Food chain
Definition
the pathway along which food is transferred from trophic level to trophic level, beginning with producers.
Term
Food web
Definition
The elaborate, interconnected feeding relationships in an ecosystem
Term
What is nutrient cycling?
Definition
the process of moving nutrients between organic and inorganic parts of the ecosystem
Term
Nutrient Cycle (4 cycles)
Definition
1)water cycle 2)carbon cycle 3)nitrogen cycle 4)phosphorus cycle
Term
DIS - Coefficient of dispersion
Definition
1)Calculated by dividing variance by the mean 2)measure of the overall distribution of the data
Term
Current and Global biodiversity issues
Definition
CLIMATE CHANGE(polar ice caps, ozone depletion) INVASIVE SPECIES(introduction of nonnative species by humans has allowed them to become dominant because they have no natural predators)HABITAT LOSS(rain forest destruction, logging industry)OVEREXPLOITATION(OVER KILL ON ANIMALS, leads to extinction, ex. beavers, cod, elephants, sea otters.)
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