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accidental species

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accidental species [¦ak·sə¦den·təl ′spē·shēz]
(ecology)
A species which constitutes less than one-fourth of the population of a stand.


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Science itself said that the universe gave no evidence of design, that the evolution of life was accidental and yet (somehow) also determined, and that mankind was simply one accidental species among all the others, a "naked ape" as a later evolutionary writer put it.
The addition or deletion of a single species can change important properties of an ecosystem, influencing the regulation of energy flow and the cycling of chemicals, Vitousek reports after considering examples of deliberate and accidental species introductions.
 
 
 
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