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Environmental Science Flashcards Vol. 2
Communities
15
Science
Not Applicable
02/27/2014

Additional Science Flashcards

 


 

Cards

Term
Trophic Level
Definition
each of several hierarchical levels in an ecosystem, comprising organisms that share the same function in the food chain and the same nutritional relationship to the primary sources of energy.
Term
Climax Community
Definition
a historic term that expressed a biological community of plants and animals and fungi which, through the process of ecological succession
Term
Pioneer Species
Definition
hardy species which are the first to colonize previously disrupted or damaged ecosystems, beginning a chain of ecological succesion that ultimately leads to a more biodiverse steady-state ecosystem
Term
Lichen
Definition
a simple slow-growing plant that typically forms a low crustlike, leaflike, or branching growth on rocks, walls, and trees.
Term
Primary Succession
Definition
one of two types of biological and ecological succession of plant life, occurring in an environment in which new substrate devoid of vegetation and usually lacking soil, such as a lava flow or area left from retreated glacier, is deposited
Term
Secondary Succession
Definition

The ecological succession that occurs on a preexisting soil after the primary succession has been disrupted or destroyed due to a disturbance that reduced the population of the initial inhabitants.

 

Term
Biomass
Definition
the total mass of organisms in a given area or volume
Term
Decomposer
Definition
a soil bacterium, fungus, or invertebrate, that decomposes organic material.
Term
Symbiosis
Definition
interaction between two different organisms living in close physical association, typically to the advantage of both.
Term
Mutualism
Definition
a relationship between two species of organisms in which both benefit from the association
Term
Commensalism
Definition
an association between two organisms in which one benefits and the other derives neither benefit nor harm.
Term
Host
Definition

An organism that is infected with or is fed upon by a parasitic or pathogenic organism

 

Term
Parasitism
Definition

 

A form of symbiosis in which one organism benefits at the expense of another organism usually of different species

 

Term
Heterotroph
Definition
an organism that consumes other organisms in a food chain.
Term
Autotroph
Definition
an organism that serves as a primary producer in a food chain.
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