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Biology
Ecosystem (chpter 1)
32
Biology
Undergraduate 1
09/04/2014

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Term
Trophic level
Definition
feeding level
Term
Producers
Definition
Photosynthesizers.
Form lowest trophic level
Term
Consumers
Definition
Use energy stored by producers
Form higher trophic levels
Term
Mass extinction
Definition
large number of species that become extinct over a short time
Term
Background extinction
Definition
occur at lower rates at lower rates during times other than mass extinctions
Term
Ecology
Definition
the study of interactions between organisms and between organismts and the environment
Term
Energy
Definition
supplied by the sun. enters the living world as photosynthetic organisms trap the sun’s energy and transform it into glucose during photosynthesis
carbohydrate
Term
Small plant
Definition
"herba"
Term
To devour
Definition
"vorare"
Term
Flesh
Definition
"carne"
Term
Tertiary Consumers
Definition
Term
All
Definition
"omni"
Term
Decomposers
Definition
Consume dead organic material for energy -bacteria, fungi-
release inorganic material that can be used by producers
Term
Food chain
Definition
Depicts feeding relationships by showing a linear sequence and is simplistic
Term
Food web
Definition
Depicts feeding relationships by showing many organisms and what they eat at several trophic levels
More realistic
Term
BIomass
Definition
Dry weight of an organism
Term
When it is transferred from one trophic level to the next.
10% to the next trophic level
Definition
How is energy lost?
Term
Ecological Pyramids
Definition
Diagrams that compare certain properties in a series of related trophic levels
Term
Pyramid of energy
Definition
Depicts energy available at each trophic level
Term
Pyramid of biomass
Definition
Describes number of individuals at each trophic level
Term
Biological Magnification
Definition
The tendency of non degradable chemicals to become more concentrated in organisms in each successive trophic level
Term
niche
Definition
the organism's role in the ecosystem, defined by all the physical, chemical, and biological factors that keep the organism healthy and allow it to reproduce
Term
habitat
Definition
the physical place where an organism lives
Term
succession
Definition
the sequence of changes in the kinds of species making up a community
Term
Primary succession
Definition
occurs where no community previously existed
Term
Secondary succession
Definition
when an existing ecological community is cleared away and is then left alone by humans- causing to undergo a sequence of changes in species composition
Term
Tertiary Consumer
Definition
carnivores that feed on secondary consumers
Term
Secondary consumers
Definition
Carnivores that feed on herbivores
Term
Producers
Definition
uses the energy of the sun to produce organic molecules
Term
Primary Consumers
Definition
Consume producers
Term
biomass
Definition
the dry weight of the organism
Term
Biological Magnification
Definition
The tendency of a non-degradable chemical to become more concentrated in organisms as it passes along the food chain
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